CN118215443A

CN118215443A - Ablation needle driving system, pressure relief anti-scalding pipe, steam ablation system and control method

Info

Publication number: CN118215443A
Application number: CN202380014053.6A
Authority: CN
Inventors: 鄢正清; 付建新; 徐孙希; 刘宇浩; 郑大路
Original assignee: Suzhou Hengrui Hongyuan Medical Technology Co ltd
Current assignee: Suzhou Hengrui Hongyuan Medical Technology Co ltd
Priority date: 2022-09-15
Filing date: 2023-09-11
Publication date: 2024-06-18
Also published as: WO2024055914A1

Abstract

The application discloses an ablation needle driving system, a pressure relief anti-scalding pipe, a steam ablation system and a control method, wherein the ablation needle driving system comprises: an ablation needle fixing device for fixing the ablation needle; and the driving device drives the ablation needle fixing device to move so as to drive the ablation needle to move. The driving device drives the ablation needle fixing device to move, so that the ablation needle is driven, a larger driving force can be obtained, the movement of the ablation needle is more reliable, and the driving effect is better.

Description

Ablation needle driving system, pressure relief anti-scalding pipe, steam ablation system and control method

The application claims priority of Chinese patent application with the application number 2022111213595 filed on the year 2022, month 09 and 15, and the name of a steam ablation system and a control method thereof; priority of chinese patent application entitled "pressure relief burn tube and steam ablation system" filed on 27/06/2023, application number 2023216402837; the priority of chinese patent application No. 2023109193121, entitled "an ablation needle drive system", filed 25 at 2023, 07, is fully incorporated herein by reference.

[ Field of technology ]

The application belongs to the technical field of medical instruments, and particularly relates to an ablation needle driving system, a pressure relief anti-scalding pipe, a steam ablation system and a control method.

[ Background Art ]

The ablation operation has the advantages of small trauma, short operation time, less complications and the like. Some ablation systems, such as steam ablation systems, operate on the principle that high-temperature steam is discharged from the tip of an ablation needle through the ablation needle tube to ablate tissue at the affected part, wherein the tip of the ablation needle is pricked into the tissue at the affected part during treatment, and the tip is retracted during treatment idle period so as not to search for the next treatment position or scratch healthy tissue when treatment is finished. Therefore, the driving effect of the ablation needle directly affects the safety and therapeutic effect of the ablation. However, the current ablation needle is poorly driven.

[ Invention ]

The application provides an ablation needle driving system, a pressure relief anti-scalding pipe, a steam ablation system and a control method, and aims to solve the technical problem of poor ablation needle driving effect.

To solve the above technical problems, the present application provides an ablation needle driving system, including: an ablation needle fixing device for fixing the ablation needle; and the driving device drives the ablation needle fixing device to move so as to drive the ablation needle to move.

Wherein, include: the ablation needle fixing device is a magneto-philic inner core; the driving device comprises a driving coil, the driving coil is arranged outside the nucleophilic inner core in a surrounding mode, and the driving coil is electrified to attract the nucleophilic inner core so as to drive the nucleophilic inner core to move relative to the driving coil.

Wherein the drive system comprises: a coil support, wherein an inner cavity is formed in the coil support, and the inner cavity is provided with a first end and a second end which are oppositely arranged along a first direction; the nucleophilic inner core is movably arranged in the inner cavity along the first direction and is used for fixing the ablation needle; the driving coil is wound on the outer side of the coil support, and is electrified to attract the magnetic core so as to provide power for the magnetic core to move towards the first end or the second end.

Wherein the drive system further comprises: the first check ring is arranged at the end part of the coil bracket, which is close to the first end; the second check ring is arranged at the end part of the coil bracket, which is close to the second end; the first magnet is arranged on one side of the first check ring, which is away from the nucleophilic inner core; the second magnet is arranged on one side of the second check ring, which is away from the nucleophilic inner core.

Wherein, the area of the first retainer ring corresponding to the inner cavity can extend into the inner cavity; the area of the second retainer ring corresponding to the inner cavity can extend into the inner cavity.

Wherein, include: the first end cover is covered on one side of the first check ring, which is opposite to the coil bracket, and the first magnet is positioned in the first end cover; the second end cover is covered on one side of the second check ring, which is opposite to the coil bracket, and the second magnet is positioned in the first end cover.

And when the nucleophilic inner core is attached to the second retainer ring, the nucleophilic inner core at least partially overlaps with the driving coil.

The driving coil is a unidirectional coil and is formed by winding a single coil on the outer side of the coil bracket.

Wherein, in the first direction, the driving coil is arranged centrally on the coil support or is arranged at one end in a deflection manner.

Wherein, include: the ablation needle is inserted into the magneto-philic inner core and extends out of the coil support from the first end of the inner cavity; and the conveying pipe is communicated with the ablation needle and extends to the outside of the coil bracket from the second end of the inner cavity.

Wherein, the interior grafting groove that runs through of following the first direction of parent magnetism inner core is formed with, melts the needle and inserts and locate the grafting inslot, and the parent magnetism inner core surface has still seted up and has held gluey groove, holds gluey groove intercommunication grafting groove.

Wherein, include: the viscose passage is arranged at the end part of the nucleophilic inner core, facing the first end, of the nucleophilic inner core, the viscose passage is communicated with the splicing groove, and the inner diameter of the viscose passage is matched with the outer diameter of the ablation needle so as to be penetrated by the ablation needle.

Wherein, include: the guide channel is arranged at the end part of the nucleophilic inner core, which faces the second end, and is communicated with the inserting groove, and the conveying pipe penetrates through the guide channel.

The inner wall of the coil bracket is provided with a plurality of supporting ribs which are arranged at intervals and extend along the first direction.

Wherein, include: the pull rod is arranged on the magneto-philic inner core and extends to the outside of the coil bracket from the second end of the inner cavity.

Wherein, include: the first sensor is arranged outside the coil bracket and positioned at one side of the pull rod facing the first end, and when the nucleophilic inner core moves to the first check ring, the first sensor senses the pull rod; and/or the second sensor is arranged outside the coil bracket and positioned at one side of the pull rod towards the second end, and when the nucleophilic inner core moves to the second check ring, the second sensor senses the pull rod.

In order to solve the above technical problems, the present application further provides a steam ablation system, wherein the steam ablation system includes any one of the driving systems described above. In order to solve the technical problems, the application also provides a pressure-relief scalding-prevention pipe which is used for a steam ablation system, and the pressure-relief scalding-prevention pipe comprises a pipeline main body and a scalding-prevention structure; the pipeline main body is communicated with the steam ablation system; the anti-scalding structure is arranged on the periphery of the pipeline main body so as to prevent the pipeline main body from scalding a user.

The anti-scalding structure comprises one or more heat dissipation rib plates, and the heat dissipation rib plates are arranged on the outer wall of the pipeline main body so as to reduce the surface temperature of the pipeline main body.

Wherein the pipeline main body is communicated with a steam generating coil in the steam ablation system; gaps are formed between any adjacent radiating rib plates to form a radiating cavity.

The plurality of radiating rib plates are sequentially connected and spirally arranged on the outer wall of the pipeline main body.

The plurality of radiating rib plates are arranged at intervals along the outer circumferential direction of the pipeline main body, and the plurality of radiating rib plates face the center of the pipeline main body.

The heat dissipation rib plates are arranged in a ring shape, and the plurality of heat dissipation rib plates are arranged at intervals along the axial direction of the pipeline main body.

The pressure relief anti-scalding pipe further comprises a heat insulation pipeline; the heat insulation pipeline is sleeved on the pipeline main body, and the plurality of radiating rib plates are connected with the inner wall of the heat insulation pipeline.

In order to solve the technical problems, the application also provides a steam ablation system, which comprises any one of the pressure relief and scald preventing pipes.

Wherein the steam ablation system comprises an ablation needle, a flexible connecting pipe and a steam generating coil; two ends of the flexible connecting pipe are respectively communicated with the ablation needle and the steam generating coil pipe, and the pipeline main body is communicated with the flexible connecting pipe.

Wherein the steam ablation system further comprises an ingress pipe; the side wall of the ingress pipe is provided with an opening, the end part of the ablation needle far away from the flexible connecting pipe is provided with a steam ejection part, the steam ejection part stretches into the ingress pipe, and the steam ejection part can stretch into or stretch out through the opening.

Wherein the steam ablation system further comprises a drive member; the driving force generated by the driving member acts on the ablation needle, and the driving member is used for driving the ablation needle to move along the axial direction of the ingress pipe.

Wherein the steam ablation system further comprises a heating portion; the heating part is sleeved outside the steam generating coil, and is used for heating the steam generating coil.

In order to solve the above technical problem, the present application further provides a steam ablation system, including: a steam device; a sterile water delivery device configured to introduce sterile water to the steaming device at a constant flow rate to cause the steaming device to discharge steam; the pressure relief device and the ablation needle can be pushed out or retracted relative to the steam device; when the ablation needle is pushed out relative to the steam device, steam discharged by the steam device is discharged through the ablation needle; when the ablation needle is retracted relative to the vapor device, vapor expelled from the vapor device can be expelled through the pressure relief device.

The steam device opens the steam hole when the ablation needle is pushed out relative to the steam device, so that steam exhausted by the steam device is exhausted through the steam hole; when the ablation needle is retreated relative to the steam device, the steam device seals the steam hole, so that steam discharged by the steam device can be discharged through the pressure relief device.

Wherein, steam device includes: one end of the steam generating coil pipe is communicated with the sterile water conveying device, and the other end of the steam generating coil pipe is communicated with the ablation needle; a heating coil, which is arranged around the periphery of the steam generating coil, and is configured to heat the steam generating coil so as to enable the steam generating coil to discharge steam; the plugging ring is sleeved on the periphery of the ablation needle; when the ablation needle is pushed out relative to the plugging ring, the plugging ring opens the steam hole; when the ablation needle retreats relative to the plugging ring, the plugging ring plugs the steam hole.

Wherein, steam device includes: one end of the steam generating coil is communicated with the sterile water conveying device; the head of the steam conveying pipe is in an opening shape, the steam conveying pipe penetrates through a cavity in the ablation needle, the steam conveying pipe is connected with the pressure relief device, the heating coil is arranged on the periphery of the steam generating coil in a surrounding mode and is configured to heat the steam generating coil, and steam is generated by the steam generating coil and is led into the steam conveying pipe; when the ablation needle is pushed out relative to the steam delivery tube, the steam delivery tube opens the steam hole; when the ablation needle is retreated relative to the steam delivery tube, the steam delivery tube seals the steam hole.

Wherein, the steam delivery pipe is clearance fit with the cavity wall of the cavity inside the ablation needle.

Wherein the steaming device further comprises: one end of the flexible connecting pipe is connected and communicated with the steam generating coil pipe, and the other end of the flexible connecting pipe is connected and communicated with the steam conveying pipe.

Wherein the steaming device further comprises: the sealing ring is fixed on the cavity wall at the tail part of the ablation needle and is clamped between the cavity wall of the ablation needle and the outer wall of the steam delivery pipe.

The cavity wall of the ablation needle is provided with a plurality of steam holes at intervals, and when the ablation needle retreats relative to the steam device, the steam device seals each steam hole.

Wherein, the cavity wall of ablation needle is equipped with a plurality of steam holes at intervals, has seted up first exhaust hole on the pipe wall of steam delivery pipe, and when the relative steam delivery pipe of ablation needle was returned, at least one steam hole just switched on with first exhaust hole, and remaining steam hole all is by the shutoff of steam delivery pipe.

The cavity wall of the ablation needle is also provided with a vent hole, and when the ablation needle is pushed out or retreated relative to the steam conveying pipe, the vent hole is communicated with the steam conveying pipe.

Wherein the steam ablation system further comprises: and the waste liquid recovery device is communicated with the pressure relief device and is configured to collect the steam discharged by the pressure relief device.

Wherein the steam ablation system further comprises: a drive system configured to drive the ablation needle out or back relative to the vapor device.

Wherein the steam ablation system further comprises: the ablation needle is movably arranged in the first cavity in a penetrating way, and the head of the ablation needle can extend out of the ingress pipe through the first cavity and the second cavity; and the endoscope is arranged in the second cavity in a penetrating way, and the lens of the endoscope is arranged opposite to the head of the ablation needle.

Wherein the head of the ablation needle is provided with a marking ring.

Wherein, a gap is formed between the endoscope and the cavity wall of the second cavity, so that the washed physiological saline can circulate in the gap.

In order to solve the above technical problem, the present application further provides a steam ablation system, including: a steam device; a sterile water delivery device configured to introduce sterile water to the steaming device at a constant flow rate to cause the steaming device to discharge steam; the cavity wall of the ablation needle is provided with a steam hole, and the ablation needle can be pushed out or retracted relative to the steam device; when the ablation needle is pushed out relative to the steam device, the steam device opens the steam hole so that steam discharged by the steam device is discharged through the steam hole; when the ablation needle is retracted relative to the vapor device, the vapor device occludes the vapor aperture.

Wherein, steam device includes: one end of the steam generating coil is communicated with the sterile water conveying device; the head of the steam conveying pipe is in an opening shape, the steam conveying pipe penetrates through the cavity in the ablation needle, the heating coil is arranged on the periphery of the steam generating coil in a surrounding mode and is configured to heat the steam generating coil, and steam is generated by the steam generating coil and is introduced into the steam conveying pipe; when the ablation needle is pushed out relative to the steam delivery tube, the steam delivery tube opens the steam hole; when the ablation needle is retreated relative to the steam delivery tube, the steam delivery tube seals the steam hole.

In order to solve the technical problems, the application also provides a control method of a steam ablation system, which is used for the steam ablation system, wherein the steam ablation system comprises a steam device, a sterile water conveying device, a pressure relief device and an ablation needle, and the driving system adopts the driving system, wherein the control method of the steam ablation system comprises the following steps: after the steam ablation system is started, the sterile water is introduced into the steam device through the sterile water conveying device at a constant flow rate so that the steam device discharges steam; when the ablation is performed on the tissue, the driving system controls the ablation needle to push out relative to the steam device, and steam discharged by the steam device is discharged through the ablation needle; when the ablation needle is in the treatment gap, all the steam exhausted by the steam device is exhausted through the pressure relief device or part of the steam exhausted by the steam device is exhausted through the pressure relief device.

The beneficial effects of the application are as follows: by momentarily energizing the drive coil, the drive coil windings form a momentary strong magnetic field that attracts the magnetically receptive core, causing the magnetically receptive core to move toward the drive coil center to the first end of the coil support. And the driving coil is instantly electrified again, and the nucleophilic inner core is ejected to the second end of the coil bracket in the same way, so that the needle insertion and the needle withdrawal of the ablation needle are realized. According to the driving system, the high-voltage high current is conducted through the driving coil to form a strong magnetic field, the magnetic core is attracted to move, the driving force and the driving speed of the magnetic core are high, and the driving force and the driving speed can be changed by adjusting different instantaneous voltages, so that the quick response of the ablation needle is realized, the larger driving force is obtained, the movement of the ablation needle is more reliable, and the driving effect is better. The driving coil can drive the magnet-philic inner core to move when being electrified instantly, so that the driving coil can not generate heat due to continuous electrification, the magnetic force of a magnetic field formed by the driving coil can be ensured, and the driving force is prevented from being reduced.

The pressure relief anti-scalding pipe is used for a steam ablation system, is communicated with a steam generating coil pipe in the steam ablation system through a pipeline main body, hot steam enters the pipeline main body through the steam generating coil pipe, one or more heat dissipation rib plates are arranged on the outer wall of the pipeline main body, gaps between the heat dissipation rib plates form a heat dissipation cavity, heat of the pipeline main body is dissipated in the heat dissipation cavity through the surfaces of the heat dissipation rib plates, the temperature of the surface of the pipeline main body is further reduced, the heat dissipation rib plates can reduce the contact area between skin and the pipeline main body, scalding of operators or patients is effectively avoided, the technical problem that in the prior art, during a treatment interval period, steam flows into a waste liquid recovery device through a pressure relief valve, the surface temperature of the whole pressure relief pipeline is high, and the patients or operators are easy to scald is solved.

According to the steam ablation system provided by the application, the pressure relief device is connected to the steam device, when the ablation needle is pushed out relative to the steam device, namely in the treatment period, steam exhausted by the steam device is exhausted through the ablation needle, so that thermal ablation of tissues is realized, and when the ablation needle is retracted relative to the steam device, namely in the treatment interval period, the steam exhausted by the steam device can be exhausted through the pressure relief device, so that excessive steam is prevented from being exhausted through the ablation needle to scald a patient. In addition, the setting of pressure release device makes aseptic water conveyor can be throughout with invariable velocity of flow to steam device in treatment period and treatment interval period and lets in aseptic water, has avoided the emergence of the negative pressure phenomenon of ablation needle position at the treatment interval period, has also reduced the steam response time when treating next time for the ablation needle can be in the steam of producing when treating next time in the twinkling of an eye, has improved treatment efficiency.

According to the steam ablation system provided by the application, when the ablation needle is pushed out relative to the steam device, namely in a treatment period, the steam device opens the steam hole so that steam exhausted by the steam device is exhausted through the steam hole, thermal ablation of tissues is realized, and when the ablation needle is retracted relative to the steam device, namely in a treatment interval period, the steam device seals the steam hole, so that excessive steam is prevented from being exhausted through the ablation needle to scald a patient. In addition, the setting of pressure release device makes aseptic water conveyor can be throughout with invariable velocity of flow to steam device in treatment period and treatment interval period and lets in aseptic water, has avoided the emergence of the negative pressure phenomenon of ablation needle position at the treatment interval period, has also reduced the steam response time when treating next time for the ablation needle can be in the steam of producing when treating next time in the twinkling of an eye, has improved treatment efficiency.

According to the control method of the steam ablation system, provided by the application, during the treatment period, the steam exhausted by the ablation needle can realize thermal ablation of tissues, and during the treatment interval period, excessive steam can be prevented from being exhausted from scalding patients through the ablation needle. In addition, the setting of pressure release device makes aseptic water conveyor can be throughout with invariable velocity of flow to steam device in treatment period and treatment interval period and lets in aseptic water, has avoided the emergence of the negative pressure phenomenon of ablation needle position at the treatment interval period, has also reduced the steam response time when treating next time for the ablation needle can be in the steam of producing when treating next time in the twinkling of an eye, has improved treatment efficiency.

[ Description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic view of an embodiment of a steam ablation system of the application with an ablation needle in an advanced state;

FIG. 2 is a schematic view of an embodiment of a steam ablation system of the application with an ablation needle in a retracted state;

FIG. 3 is a schematic overall construction of an embodiment of the ablation needle drive system of the application, wherein the magnetically receptive core is positioned at a first end;

FIG. 4 is a schematic view of a portion of one embodiment of an ablation needle drive system of the application wherein the drive coil is short in length in a and is not centered in position on the coil support in b;

FIG. 5 is a partial schematic view of an embodiment of an ablation needle drive system of the application with a magnetically active core at a second end;

FIG. 6 is a schematic partial structural view of an embodiment of an ablation needle drive system of the application in which the magnetically permeable core is positioned with a side of the magnetically permeable core facing the first end aligned with a side of the drive coil facing the second end;

FIG. 7 is a schematic overall construction of yet another embodiment of an ablation needle drive system of the application;

FIG. 8 is a schematic cross-sectional view of a nucleophilic core of one embodiment of an ablation needle drive system of the application;

FIG. 9 is a schematic perspective view of a nucleophilic core of an embodiment of an ablation needle drive system of the application;

FIG. 10 is a schematic overall construction of yet another embodiment of an ablation needle drive system of the application;

FIG. 11 is a schematic illustration of a portion of one embodiment of a steam ablation system of the application;

Fig. 12 is a cross-sectional view of an ingress pipe body portion of an embodiment of a steam ablation system of the application;

FIG. 13 is a schematic diagram of a portion of one embodiment of a steam ablation system of the application;

FIG. 14 is a partial cross-sectional view of an ablation needle and vapor delivery tube of an embodiment of a vapor ablation system of the application;

FIG. 15 is a schematic view of the structure of an ablation needle of a further embodiment of the steam ablation system of the application in an advanced state;

FIG. 16 is a schematic view of a structure of a steam ablation system of yet another embodiment of the application with an ablation needle in a retracted state;

FIG. 17 is a partial cross-sectional view of an ablation needle and occlusion ring of yet another embodiment of the steam ablation system of the application;

FIG. 18 is a partial cross-sectional view of an ablation needle and steam delivery tube of yet another embodiment of a steam ablation system of the application;

FIG. 19 is a partial cross-sectional view of an ablation needle and steam delivery tube of yet another embodiment of a steam ablation system of the application;

FIG. 20 is a partial cross-sectional view of an ablation needle and steam delivery tube of yet another embodiment of the steam ablation system of the application;

FIG. 21 is a partial cross-sectional view II of an ablation needle and a vapor delivery tube provided by yet another embodiment of a vapor ablation system of the application;

FIG. 22 is a cross-sectional view of the entire structure of the first embodiment of the pressure relief burn tube of the present application;

Fig. 23 is a schematic overall structure of the pressure release scalding prevention pipe according to the first embodiment of the present application;

fig. 24 is a cross-sectional view of the entire structure of the second embodiment of the pressure relief burn resistant tube of the present application;

Fig. 25 is a schematic view of the overall structure of the pressure relief burn-proof tube according to the second embodiment of the present application;

Fig. 26 is a cross-sectional view of the entire structure of a third embodiment of the pressure relief burn resistant tube of the present application;

fig. 27 is a schematic view of the overall structure of a third embodiment of the pressure relief burn-proof tube of the present application;

Fig. 28 is a cross-sectional view of the entire structure of a fourth embodiment of the pressure relief burn resistant tube of the present application;

fig. 29 is a schematic view of the overall structure of a fourth embodiment of the pressure release and scald preventing tube according to the present application.

[ Detailed description ] of the invention

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings.

First, a simple description will be given of a steam ablation system according to an embodiment of the present application, and an embodiment of the present application provides a steam ablation system that can be inserted into an affected area of a patient and perform thermal ablation on tissue of the affected area of the patient, so as to achieve a therapeutic purpose. For example, the steam ablation system can be inserted into the urethra of a patient and thermally ablate the prostatic hyperplasia tissue of the patient to treat the prostatic hyperplasia.

The steam ablation system provided by the embodiment comprises an ingress pipe 7, a steam device 2, a sterile water conveying device 3 and an ablation needle 1, wherein the ingress pipe 7 can be inserted into the urethra of a patient, a first cavity 711 is formed in the ingress pipe 7, the ablation needle 1 is movably arranged in the first cavity 711 in a penetrating mode, the head of the ablation needle 1 can extend out of the ingress pipe 7, the sterile water conveying device 3 is communicated with the steam device 2, the sterile water conveying device 3 can be used for introducing sterile water into the steam device 2, the steam device 2 can be used for heating and converting the introduced sterile water into steam, steam exhausted by the steam device 2 can be discharged into a cavity inside the ablation needle 1, and the ablation needle 1 can be pushed out or retracted relative to the steam device 2 and the ingress pipe 7. When the ablation needle 1 is required to perform thermal ablation on the prostatic hyperplasia tissue of the patient as shown in fig. 1, the ablation needle 1 is pushed out relative to the steam device 2 and the ingress pipe 7, the head of the ablation needle 1 can extend out of the ingress pipe 7, and steam in the cavity of the ablation needle 1 can be discharged to the prostatic hyperplasia tissue of the patient through the head of the ablation needle 1, and when the thermal ablation is completed, or during a treatment interval, the ablation needle 1 can be retracted relative to the steam device 2 and the ingress pipe 7 as shown in fig. 2, so that the head of the ablation needle 1 is retracted into the first cavity 711 of the ingress pipe 7.

Furthermore, as shown in fig. 1 and 2, the steam ablation system further comprises an ablation needle driving system 6, and the ablation needle driving system 6 is used for driving the ablation needle 1 to push out or retract relative to the steam device 2 and the ingress pipe 7.

The long-term research of the inventor discovers that the existing ablation needle driving systems adopt screw rod driving or gear rack driving, and have the defects of large size and slow response of a driving module. Some existing ablation needle driving systems also adopt spring driving, the elastic potential energy of the spring is weakened, the driving force is unstable, and an operator is required to manually withdraw the needle to compress the spring.

Some existing ablation needle driving systems also adopt a bidirectional winding coil to lead forward and reverse currents, so that a magnetic field is pushed and pulled, and then the permanent magnet iron core is driven to move. The permanent magnet iron core is attached to the check ring by continuously electrifying the two coils (or electrifying with a duty ratio), so that the position is kept, but in the scheme, the continuously electrified coils are easy to generate heat, and the magnetic field formed by the heated coils weakens the magnetic force, so that the driving force is reduced; meanwhile, the permanent magnet can be demagnetized in a reverse magnetic field, and the permanent magnet is easy to demagnetize in a high-voltage and high-current strong magnetic field, so that the coil cannot use high-voltage and high-current in the scheme, and the driving force is small; in addition, the high temperature of steam during steam ablation can cause demagnetization of the permanent magnet, thereby influencing the driving effect of the ablation needle; because the permanent magnet iron core is arranged in the two coils at the same time, the driving stroke is limited. Therefore, the scheme of matching the bidirectional winding coil with the permanent magnet has the defects of limited driving stroke, general driving force and general holding force.

The drive system 6 of the present application includes an ablation needle fixture and a drive. The ablation needle fixing device is used for fixing the ablation needle 1. The driving device drives the ablation needle fixing device to move so as to drive the ablation needle 1 to move. The ablation needle fixing device is driven to move by the driving device, so that the ablation needle 1 is driven, a larger driving force can be obtained, the movement of the ablation needle 1 is more reliable, and the driving effect is better.

Wherein the ablation needle fixture may be a magneto-philic inner core 61. The driving device comprises a driving coil 62, the driving coil 62 is arranged outside the nucleophilic inner core 61 in a surrounding way, and the driving coil 62 is electrified to attract the nucleophilic inner core 61 so as to drive the nucleophilic inner core 61 to move relative to the driving coil 62. Specifically, the driving system 6 in the embodiment of the application includes a nucleophilic inner core 61 and a driving coil 62, where the nucleophilic inner core 61 is fixed with the outer wall of the ablation needle 1, the driving coil 62 is enclosed outside the nucleophilic inner core 61, and the driving coil 62 can drive the nucleophilic inner core 61 to move relative to the driving coil 62. Specifically, when the driving coil 62 is energized in the forward direction, the nucleophilic inner core 61 drives the ablation needle 1 to push out relative to the steam device 2 and the ingress pipe 7 under the action of magnetic force, and when the driving coil 62 is energized in the reverse direction, the nucleophilic inner core 61 drives the ablation needle 1 to retract relative to the steam device 2 and the ingress pipe 7 under the action of magnetic force.

First, referring to fig. 1, an ablation needle driving system 6 drives an ablation needle 1 to enter the needle and extend out of an ingress pipe 7 to perform ablation. The ablation needle driving system 6 can also drive the ablation needle 1 to withdraw into the ingress pipe 7, so that the use safety under non-ablation work is ensured.

Referring now to the ablation needle drive system 6 in detail, one embodiment of the present application provides an ablation needle drive system 6, see fig. 3, comprising a coil support 610, a magnetically permeable core 61, and a drive coil 62. Wherein a lumen 611 is formed within the coil support 610. The lumen 611 has a first end 601 and a second end 602 disposed opposite in a first direction X. The magnetically permeable core 61 is movably disposed within the cavity 611 along a first direction X. The ablation needle 1 is fixed to a magneto-philic inner core 61. The ablation needle 1 may extend from the first end 601 out of the coil support 610. The driving coil 62 is wound around the outside of the coil holder 610. The drive coil 62 is energized to attract the magnetically receptive core 61 to provide motive force to the magnetically receptive core 61 to move toward the first end 601 or the second end 602.

Before the driving system 6 is operated, the nucleophilic inner core 61 can be driven to move to the second end 602 of the inner cavity 611, and the ablation needle 1 is in the needle withdrawing state, wherein the center of the nucleophilic inner core 61 is deviated from the center of the driving coil 62. When the driving coil 62 is continuously energized, the driving coil 62 forms a magnetic field, the nucleophilic core 61 is attracted under the action of the magnetic field, and the nucleophilic core 61 moves toward the first end 601 under the action of the magnetic field due to the coil holder 610 being a fixed member, and fluctuates back and forth due to inertia when moving to a position where the center of the nucleophilic core 61 is aligned with the center of the driving coil 62, and finally stops at a position where the center of the nucleophilic core 61 is aligned with the center of the driving coil 62. Therefore, if the driving coil 62 is controlled to be powered on instantaneously, the driving coil 62 is powered off to lose the magnetic field, meanwhile, the nucleophilic inner core 61 is demagnetized rapidly, and no magnetic field acts at this time, the nucleophilic inner core 61 also has potential energy moving towards the center of the driving coil 62, and can continue to move towards the first end 601 until moving to the first end 601, and the ablation needle 1 is in the needle insertion state.

Thus, by momentarily energizing the drive coil 62, the drive coil 62 windings form a momentary strong magnetic field that attracts the magnetically receptive core, causing the magnetically receptive core 61 to move toward the center of the drive coil 62 until the first end 601 of the coil support 610. Once again, momentary energization of the drive coil 62 will eject the magnetically receptive core 61 to the second end 602 of the coil support 610 in the same manner, thereby effecting needle advancement and needle withdrawal of the ablation needle 1.

The driving system 6 of the application adopts the driving coil 62 to match with the nucleophilic inner core 61, can form a strong magnetic field by high voltage and high current through the driving coil 62, and attracts the nucleophilic inner core 61 to move, has large driving force and driving speed for the nucleophilic inner core 61, and can change the driving force and the driving speed by adjusting different instantaneous voltages, thereby realizing the quick response of the ablation needle 1, obtaining larger driving force, ensuring more reliable movement of the ablation needle 1 and better driving effect. The nucleophilic inner core 61 is not magnetic, can be attracted by a magnetic field, can be demagnetized rapidly after magnetization, and has no problems of demagnetization at high voltage and high current and steam high temperature during steam ablation. In addition, the driving coil 62 can drive the magneto-philic inner core 61 to move by instant power-on, so that the driving coil 62 can not generate heat due to continuous power-on, the magnetic force of the magnetic field formed by the driving coil 62 can be ensured, and the driving force is prevented from being reduced.

Because the driving system 6 has the advantage of quick response, the needle can be quickly advanced and retracted, and the experience of operators can be improved on the first aspect; in the second aspect, the ablation work can be performed immediately after the needle insertion instruction is triggered, and healthy tissues cannot be scalded; the third aspect can retract the ablation needle 1 to the introduction shaft immediately after the needle retraction command is issued, without scratching the tissue.

Because the driving system 6 has the advantage of large driving force, the ablation needle 1 can be stably pricked into an affected part during needle insertion, and the ablation effect is improved. Referring to fig. 4, the length of the coil support 610 in the first direction X is S, the length of the magneto-philic core 61 in the first direction X is L,0< L < S, and the stroke of the magneto-philic core 61 is n,0< n < S. Since the driving force of the driving coil 62 is larger in this embodiment, referring to a diagram a in fig. 4, the driving coil 62 may be set shorter in length. Because the application adopts the single driving coil 62 to drive the nucleophilic inner core 61 to move, compared with the driving mode of adopting two positive and negative coils, the driving system 6 of the application has wider driving stroke range under the same size limitation, the ablation needle 1 can touch far affected parts, the setting mode of the driving coil 62 is more flexible, and the ablation effect is improved.

Referring to a diagram a in fig. 4, in the first direction X, the driving coil 62 is centrally disposed on the coil support 610, and at this time, the driving force of the driving coil 62 for driving the nucleophilic core 61 to move toward the first end 601 and the second end 602 is the same, so that the driving force of the ablation needle 1 during needle insertion and needle withdrawal is the same. Referring to fig. 4 b, in the first direction X, the driving coil 62 may be disposed at one end of the coil holder 610, that is, the driving coil 62 may be disposed asymmetrically, so that driving forces of the ablation needle 1 for needle insertion and needle withdrawal are different. Specifically, in the b-diagram of fig. 4, the driving coil 62 is disposed biased toward the first end 601 so that the nucleophilic core 61 moves toward the first end 601 in a direction to drive the ablation needle 1 into the needle, and the driving force is greater when the ablation needle 1 is driven into the needle.

The driving coil 62 is a unidirectional coil, and is formed by a single coil wound on the outside of the coil support 610. Specifically, referring to fig. 3, a groove may be formed outside the coil support 610 for winding the driving coil 62. The drive coil 62 may be a single turn multi-layer coil wound with wire having a wire diameter of 0.4-1.0 mm. For example, enameled wires with a wire diameter of 0.4mm, 0.6mm or 0.8 mm. Specifically, the drive coil 62 is a single winding, with about 800 turns of awg#30 magnet wire wound, and the ablation needle 1 is pushed out/retracted through its full stroke of about 11mm in 0.02 seconds under the action of the drive coil 62. Increasing the length of the drive coil 62 may increase the driving force of the drive system 6 to some extent, or increasing the number of turns of the drive coil 62 and the coil current may achieve the same effect.

Specifically, the voltage of the high-voltage instant power which can be passed through the driving system 6 of the present application is 80V-400V, for example 80V, 120V, 230V, 370V or 400V, and the higher the voltage, the stronger the magnetic field and the larger the driving force. Wherein the current can be stored through the capacitor and then released instantaneously to form a high voltage and large current, thereby driving the magneto-philic core 61.

Specifically, the nucleophilic core 61 may be a soft iron core, which is non-magnetic, and is easily magnetized after being attracted by a magnetic field, and is easily and rapidly demagnetized after being magnetized. Preferably, the soft iron core is generally DT4 or 1j117, etc., so that the magnet-philic core 61 is prevented from being magnetized into a permanent magnet, and can be rapidly demagnetized, thereby avoiding influence on driving force and driving direction after being magnetized. Because the magnetic core 61 adopts the soft iron core, the magnetic core 61 is driven to move by the attraction of the magnetic field formed by the electrified driving coil 62 to the metal, the magnetic core is not influenced by time and high temperature, and the reliability of driving the ablation needle 1 is higher. The magnetically attracting core 61 is a material that is non-magnetic and attracted by a magnetic field, and is also rapidly demagnetized after being magnetized. In other embodiments, the magneto-philic core 61 may also be made of a metal material such as diamond, nickel, etc.

In order to reduce friction during movement of the inner core 61 within the cavity 611, in some embodiments, referring to fig. 3 and 8, the inner wall of the coil support 610 has a plurality of spaced apart support ribs 612 extending in the first direction X. The support ribs 612 may space the magnetically receptive core 61 from the inner wall of the coil support 610 to reduce friction during movement of the magnetically receptive core 61 within the lumen 611. Specifically, the support rib 612 has two ribs, three ribs, or four ribs.

In some embodiments, referring to fig. 3, the drive system 6 further includes a first collar 641 and a second collar 642. The first collar 641 is disposed at an end of the coil support 610 near the first end 601, and a region of the first collar 641 corresponding to the inner cavity 611 may extend into the inner cavity 611. The second collar 642 is disposed at an end of the coil support 610 near the second end 602, and a region of the second collar 642 corresponding to the inner cavity 611 may extend into the inner cavity 611. By providing the second collar 642 to limit the movement of the inner core 61 within the lumen 611 toward the second end 602, and by providing the first collar 641 to limit the movement of the inner core 61 within the lumen 611 toward the first end 601, the inner core 61 is prevented from disengaging the coil support 610.

The driving stroke of the ablation needle 1 in the embodiment of the application has various adjustment modes.

First kind: the coil support 610 can be replaced, and the length of the inner cavity 611 can be changed by adjusting the length of the coil support 610, so that the moving stroke of the nucleophilic inner core 61 in the inner cavity 611 is adjusted, and the driving stroke of the ablation needle 1 is adjusted.

Second kind: the nucleophilic inner core 61 can be replaced, and the moving stroke of the nucleophilic inner core 61 in the inner cavity 611 can be adjusted by adjusting the length of the nucleophilic inner core 61, so that the driving stroke of the ablation needle 1 can be adjusted.

Third kind: the first collar 641 and/or the second collar 642 may be replaced, and by changing the positions of the first collar 641 and the second collar 642 extending into the inner cavity 611 in the region corresponding to the inner cavity 611, for example, the first collar 641 and the second collar 642 may be protruded into the inner cavity 611, thereby shortening the movable stroke of the nucleophilic inner core 61, and further adjusting the driving stroke of the ablation needle 1, so as to achieve the optimal driving effect.

The ablation needle driving system 6 in the embodiment of the application not only can replace the coil support 610, but also can realize the adjustment of the driving stroke of the ablation needle 1 by replacing the first retaining ring 641 and/or the second retaining ring 642 under the condition that the length of the coil support 610 is fixed, and the adjustment is more convenient without adjusting the whole length of the coil support 610. Besides, besides adjusting the first collar 641 and/or the second collar 642 to adjust the driving stroke of the ablation needle 1, the driving stroke of the ablation needle 1 can be changed by adjusting the length of the nucleophilic inner core 61, the length of the coil support 610 is not required to be adjusted, the whole structure is not required to be adjusted, the module volume is small, and the universality is high.

In some embodiments, referring to fig. 3, the ablation needle 1 extends from the first end 601 of the lumen 611 to the outside of the coil support 610, so that the magnetically permeable core 61 can be moved toward the first end 601 in a direction to drive the ablation needle 1 into the needle. Under normal conditions, before needle insertion, the nucleophilic inner core 61 is attached to the second retaining ring 642, and the driving coil 62 is electrified to drive the nucleophilic inner core 61 to move to the first end 601 to be attached to the first retaining ring 641, so that the needle insertion of the ablation needle 1 is realized; the driving coil 62 is electrified, and can also drive the nucleophilic inner core 61 to retract from the first end 601 to be attached to the second retainer 642, so as to realize needle withdrawing of the ablation needle 1.

In order to better realize the driving of the ablation needle 1, referring to fig. 5, when the nucleophilic inner core 61 is attached to the second retaining ring 642, the nucleophilic inner core 61 is at least partially overlapped with the driving coil 62, and the driving coil 62 is energized to provide an attractive force to the nucleophilic inner core 61 toward the first end 601, so that a certain attractive force strength can be ensured, the nucleophilic inner core 61 is ensured to have a power to move toward the first end 601, and a rapid response and a larger driving force of the ablation needle 1 are realized. It should be noted that, at least a part of the nucleophilic core 61 overlaps the driving coil 62, including the alignment of the end of the nucleophilic core 61 facing the first end 601 and the end of the driving coil 62 facing the second end 602, referring to fig. 6, the alignment of the end of the nucleophilic core 61 facing the first end 601 and the end of the driving coil 62 facing the second end 602, the other end of the nucleophilic core 61 is attached to the second collar 642, and at this time, the critical position on the right side of the nucleophilic core 61 is only ensured, and only the overlapping of the nucleophilic core 61 and the driving coil 62 is ensured, so that the driving coil 62 can have a good driving effect on the nucleophilic core 61. Of course, in other embodiments, when the magnetic field formed by energizing the driving coil 62 is strong enough, when the nucleophilic inner core 61 is attached to the second collar 642, driving of the nucleophilic inner core 61 can be achieved even if the nucleophilic inner core 61 and the driving coil 62 do not overlap, without limitation.

Normally, the nucleophilic inner core 61 is moved from the first end 601 to the limit position where the second end 602 is attached to the second collar 642 in the inner cavity 611 and from the second end 602 to the limit position where the first end 601 is attached to the first collar 641 by the momentary power-on of the driving coil 62, so as to reciprocate between the first end 601 and the second end 602 of the inner cavity 611, but the driving system 6 may have abnormal jamming, so as to ensure safe operation of the driving system 6, in some embodiments, please refer to fig. 7, the driving system 6 includes a pull rod 280. The pull rod 280 is disposed on the magnetically permeable core 61 and extends from the second end 602 of the inner cavity 611 to the outside of the coil support 610. When the driving system 6 is abnormally jammed, an operator can manually pull the pull rod 280 to drive the magneto-philic inner core 61 to move, so that the ablation needle 1 is retracted to the safe position. In addition, the position of the nucleophilic inner core 61 before needle insertion can be manually adjusted by pulling the pull rod 280, and the distance between the nucleophilic inner core 61 and the second retainer 642 can be adjusted, so that the driving stroke of the ablation needle 1 can be adjusted.

In some embodiments, referring to fig. 3, the drive system 6 further includes a first magnet 651 and a second magnet 652. The first magnet 651 is disposed on a side of the first collar 641 facing away from the magnetically permeable core 61. The second magnet 652 is disposed on a side of the second collar 642 facing away from the magnetically permeable core 61. Specifically, when the nucleophilic core 61 is located at the second end 602, the driving coil 62 is energized instantaneously, so as to drive the nucleophilic core 61 to overcome the attractive force of the second magnet 652 and move toward the first end 601, the nucleophilic core 61 moves to the first collar 641 and is attracted and held by the first magnet 651, at this time, the nucleophilic core 61 can be stabilized in the needle-insertion state, and the first magnet 651 provides sufficient holding force for the nucleophilic core 61, so that the ablation needle 1 is maintained in a stable position in the working state. The driving coil 62 is energized instantaneously again to drive the nucleophilic inner core 61 to overcome the attractive force of the first magnet 651 and move toward the second end 602, the nucleophilic inner core 61 moves to the second retaining ring 642 and is attracted and held by the second magnet 652, at this time, the nucleophilic inner core 61 can be stabilized in the needle withdrawing state, and the second magnet 652 provides sufficient holding force for the nucleophilic inner core 61, so that the ablation needle 1 realizes stable needle withdrawing. By providing the first magnet 651 and the second magnet 652, sufficient holding force can be provided to the magnetically receptive core 61 such that the ablation needle 1 is held in a stable position in a shipping or operating state.

The first magnet 651 and the second magnet 652 are used for attracting the nucleophilic core 61 under the power-off condition, and providing a holding force for stabilizing the nucleophilic core 61 in the needle-inserted state or the needle-withdrawn state. The first magnet 651 and the second magnet 652 are centrally perforated for passing accessories such as ablation needles 1, delivery tubes 272, endoscopes, and the like. Specifically, the first magnet 651 and the second magnet 652 are permanent magnets.

At this time, the first collar 641 and the second collar 642 play a role of buffering the nucleophilic core 61 in addition to a limiting role on the nucleophilic core 61, and according to the requirement of the holding force of the ablation needle 1, the first collar 641 and the second collar 642 may use different materials or different thicknesses, thereby adjusting the attraction force of the first magnet 651 and the second magnet 652 and the nucleophilic core 61, thereby adjusting the holding force.

In some embodiments, referring to fig. 3, the drive system 6 further includes a first end cap 661 and a second end cap 662. The first end cap 661 is disposed on a side of the first collar 641 facing away from the coil holder 610, and the first magnet 651 is disposed within the first end cap 661. The second end cap 662 is provided on a side of the second collar 642 facing away from the coil support 610, and the second magnet 652 is located within the second end cap 662. The first end cap 661 positions and protects the first magnet 651 and the first collar 641 and the second end cap 662 positions and protects the second magnet 652 and the second collar 642.

In some embodiments, referring to fig. 3, the drive system 6 further includes an ablation needle 1 and a delivery tube 272. Wherein the ablation needle 1 is inserted into the magneto-philic inner core 61 and extends from the first end 601 of the inner cavity 611 to the outside of the coil support 610 for performing an ablation treatment. The delivery tube 272 communicates with the ablation needle 1 and extends from the second end 602 of the lumen 611 to the outside of the coil support 610 for passage of external instruments or drugs and the like.

The ablation needle 1 may be a steam ablation needle 1, external high-temperature steam is delivered to the ablation needle 1 through a delivery tube 272, and the high-temperature steam is discharged from the tip of the ablation needle 1 to ablate the tissue at the affected part. Ablation needle 1 may also be an electrode ablation needle 1, with the delivery tube 272 providing a pathway for electrode conduction. The ablation needle 1 may also be another type of ablation needle 1, selected according to the actual situation, without limitation.

The delivery tube 272 is generally made of plastic materials such as PEEK (polyetheretherketone), has physical and chemical properties such as high temperature resistance, chemical corrosion resistance, good insulation, and the like, and is suitable for various ablation needles 1.

In some embodiments, referring to fig. 3, 8 and 9, the nucleophilic core 61 is formed with a socket 6101 therethrough along the first direction X, and the ablation needle 1 is inserted into the socket 6101. The magnetically philic inner core 61 and the ablation needle 1 may be fixed by gluing. In order to facilitate the injection of the adhesive material into the insertion groove 6101, the surface of the magneto-philic inner core 61 is further provided with a glue containing groove 6102, and the glue containing groove 6102 is communicated with the insertion groove 6101. Through the glue containing groove 6102 on the surface of the nucleophilic inner core 61, the adhesive material can be conveniently injected into the insertion groove 6101, thereby facilitating the fixation of the ablation needle 1 in the insertion groove 6101 and improving the fixation effect of the ablation needle 1 and the nucleophilic inner core 61. Specifically, the adhesive material may be an instant adhesive, an epoxy adhesive, a structural adhesive, or the like.

Further, the drive system 6 further comprises an adhesive channel 6103. The viscose channel 6103 is disposed at the end of the nucleophilic inner core 61 facing the first end 601, the viscose channel 6103 is communicated with the insertion groove 6101, and the inner diameter of the viscose channel 6103 is matched with the outer diameter of the ablation needle 1 for the ablation needle 1 to pass through. The adhesive channel 6103 improves the contact area with the ablation needle 1 and the supporting force to the ablation needle 1, and also improves the fixing effect of the nucleophilic inner core 61 with the ablation needle 1.

Referring to fig. 10, under the high-speed and strong driving of the driving system 6, the conveying tube 272 may bend, which affects the conveying function inside the conveying tube 272, especially when the ablation needle 1 is a steam ablation needle 1, the conveying tube 272 bends to cause poor steam conveying, so as to avoid other adverse effects such as bending the conveying tube 272 under the high-speed and strong driving of the driving system 6, and in some embodiments, the driving system 6 further includes a guiding channel 6104. The guiding channel 6104 is arranged at the end of the nucleophilic inner core 61 facing the second end 602, and the guiding channel 6104 is communicated with the insertion groove 6101. The conveying pipe 272 penetrates through the guiding channel 6104. The guide channel 6104 increases the contact area with the conveying pipe 272, thereby increasing the supporting force to the conveying pipe 272 and avoiding the bending of the conveying pipe 272 when moving along with the magneto-philic inner core 61.

Further, the second end cap 662 may be provided with a reinforcing tube 2621 for the conveying tube 272 to pass through, and the reinforcing tube 2621 may further promote the supporting effect on the conveying tube 272, so as to avoid the bending phenomenon of the conveying tube 272.

In some embodiments, when using the ablation needle driving system 6 of the present application, the operator first performs an initial reset operation, that is, pulls the pull rod 280 to retract the nucleophilic inner core 61 to a position attached to the second retainer ring 642 and absorbed by the second magnet 652, the ablation needle 1 is in a needle retracted state, and the host count is 0; then the operator presses the switch, the control host computer instantly releases high-voltage electricity in the capacitor to the driving coil 62, and the nucleophilic inner core 61 is driven to move towards the first end 601 under the action of the magnetic field, and is absorbed to a position attached to the first check ring 641 by the first magnet 651, so that the ablation needle 1 is ejected and is in a needle inserting state. After the capacitor is discharged, the host computer is controlled to charge the capacitor immediately, preparation is made for the next discharging, and meanwhile, the host computer count is 1. When the capacitor discharges again, the nucleophilic inner core 61 moves to be attracted by the second magnet 652, and is in the needle withdrawing state, and the host count is 2; repeatedly, the current ablation needle 1 is in the needle inserting state when the host counts to the singular number, and the current ablation needle 1 is in the needle withdrawing state when the host counts to the even number. By initial reset and host counting, the control host or operator is enabled to know whether the current ablation needle 1 is in the needle-in state or the needle-out state.

In some embodiments, the drive system 6 further comprises a first sensor (not shown) and/or a second sensor (not shown). The first sensor is disposed outside the coil support 610, and is located at a side of the pull rod 280 toward the first end 601, and senses the pull rod 280 when the nucleophilic inner core 61 moves to be attracted by the first magnet 651. The second sensor is disposed outside the coil support 610, and is located at a side of the pull rod 280 facing the second end 602, and senses the pull rod 280 when the nucleophilic inner core 61 moves to be attracted by the second magnet 652. The current state of the ablation needle 1 may be determined by sensing the pull rod 280 with the first sensor and/or the second sensor.

Specifically, the first sensor and the second sensor may be set at the same time, and the position of the pull rod 280 may be directly determined by sensing the pull rod 280 by the first sensor and the second sensor, so that the control host does not need to determine whether the ablation needle 1 is located at the needle insertion position or the needle withdrawal position by counting. Specifically, when the space size is limited, only the second sensor may be provided, and when the nucleophilic inner core 61 is located at the position attracted by the second magnet 652, that is, when the ablation needle 1 is located at the needle withdrawing position, the pull rod 280 may trigger the second sensor, and the control host may know that the ablation needle 1 is located at the needle withdrawing state, and in combination with the capacitor discharge times, the position of the ablation needle 1 may be determined.

Specifically, the driving system 6 further includes a housing (not shown in the drawings), where the housing is covered outside the coil support 610, and the first sensor and the second sensor may be disposed on an inner wall of the housing. The first sensor may be any applicable sensor such as a photoelectric sensor, an infrared sensor, a micro switch or a hall sensor. The second sensor may be any applicable sensor such as a photoelectric sensor, an infrared sensor, a micro switch or a hall sensor.

Several embodiments of the ablation needle drive system 6 are provided below:

Example 1: the coil support 610 is 28mm long, the driving coil 62 is 18mm long, and the nucleophilic inner core 61 is 16mm long. The first collar 641 and the second collar 642 are positioned at both sides of the coil holder 610, and the movement stroke of the nucleophilic inner core 61 is 12mm at this time, and when the nucleophilic inner core 61 is attached to the second collar 642, the nucleophilic inner core 61 coincides with the driving coil 62 by 11mm.

Example 2: the coil support 610 is 28mm long and the drive coil 62 is 18mm long. When a larger driving stroke is required, the size of the nucleophilic inner core 61 can be adjusted to a minimum of 5mm, and the driving stroke is 23mm. The first collar 641 and the second collar 642 are positioned at both sides of the coil support 610.

Example 3: the coil support 610 is 28mm long and the drive coil 62 is 18mm long. When the required driving stroke is smaller, the areas of the first collar 641 and the second collar 642 corresponding to the inner cavity 611 may be extended into the inner cavity 611 of the coil support 610, or the length of the driving core may be directly increased.

A steam ablation system provided by the present application may include the drive system 6 of any of the embodiments described above.

The above embodiment describes the drive system 6 of the ablation needle 1 in detail, and the following describes the other components of the steam ablation system in detail:

In order to facilitate insertion of the introduction tube 7 into the urethra of the patient, as shown in fig. 1 and 2, the introduction tube 7 includes an introduction tube main body 71 and an introduction tube tip 72, wherein the introduction tube main body 71 is screwed with the introduction tube tip 72, the introduction tube tip 72 is fitted over the outer periphery of the introduction tube main body 71, and a first cavity 711 is opened in the introduction tube main body 71. By screwing the introduction tube tip 72 to the introduction tube main body 71, the resistance of the introduction tube 7 to insertion into human tissue such as the urethra of a patient is reduced, and the injury of the introduction tube 7 to the urethra or other tissue of the patient is avoided. Preferably, the ingress pipe body 71 and ingress pipe tip 72 are in interference fit, and the fit length of the ingress pipe body 71 and ingress pipe tip 72 in a sleeved connection is about 6mm, so that the stability of fixing ingress pipe body 71 and ingress pipe tip 72 is further improved, and the sealing performance of the connection part of ingress pipe body 71 and ingress pipe tip 72 is also improved. In this embodiment, the ingress tube 7 is made of biocompatible material, and is inserted parallel to the urethra of the patient during treatment, the ingress tube tip 72 may be conical in shape, and the tip of the conical shape may have a smooth rounded transition.

In addition, as shown in fig. 1 and 2, and fig. 11 and 12, the steam ablation system further includes an endoscope 8 and a handle (not shown in the drawings), wherein the ingress pipe body 71 is fixed on the handle, a second cavity 712 is further provided in the ingress pipe body 71, the second cavity 712 is arranged at intervals from the first cavity 711, the endoscope 8 includes a mounting portion and a working portion connected with each other, the mounting portion is mounted on the handle, the working portion can penetrate into the second cavity 712, a lens is provided on the working portion, the head of the ablation needle 1 can extend out of the ingress pipe 7 through the first cavity 711 and the second cavity 712, and the lens on the working portion is disposed opposite to the head of the ablation needle 1, so that the lens of the endoscope 8 can observe the pushing and retracting actions of the ablation needle 1 relative to the ingress pipe 7 and the steam device 2. In this embodiment, the view angle of the lens may be 30 °, a certain amount of lubricant needs to be applied to the mounting portion before the mounting portion is mounted on the handle, axial limitation of the mounting portion is achieved by using the housing of the handle after mounting, and circumferential limitation of the endoscope 8 relative to the handle is achieved by using both sides of the light source interface on the endoscope 8.

Preferably, as shown in fig. 12, a gap is formed between the outer wall of the working portion of endoscope 8 and the lumen wall of second lumen 712 so that the irrigated saline can circulate at the gap, ensuring that the irrigated saline can pass through the gap within introduction tube 7, providing both a cleaning and irrigation action to the tissue during insertion of the steam ablation system and during delivery of steam to the tissue. In this embodiment, since the second cavity 712 and the first cavity 711 are arranged at intervals, almost no steam can leak from the gap of the second cavity 712.

In the prior art, during the interval of ablation treatment, the sterile water delivery device 3 stops delivering sterile water to the steaming device 2, the steaming device 2 no longer generates steam, so that a part of the pipeline in the steaming device 2 is inevitably condensed, the volume of steam is reduced to the volume of water, the vacuum is caused to generate on the ablation needle 1, blood, tissue or other substances at the injection site are sucked into the needle point from the urethra through the steam delivery port, and when the treatment is restarted, the substances are ejected from the needle before new steam is delivered into the tissue, and the treatment effect is affected. In addition, the material may clog the vapor delivery site, resulting in uneven distribution of vapor, thereby affecting the therapeutic effect. In order to solve the above-mentioned problem, the steam ablation system makes the sterile water delivery device 3 input sterile water to the steam device 2 at a low speed in the treatment interval period, so that the steam device 2 sprays a small amount of steam, so that the pressure of the ablation needle 1 in the treatment interval period keeps positive pressure, and substances are prevented from being sucked into the needle, therefore, the sterile water delivery device 3 needs to inject sterile water at different flow rates in the treatment period and the treatment interval period, the time for steam to re-occur can be obviously increased due to different flow rates of the injected sterile water, the steam response time of the next treatment is prolonged, and the treatment efficiency is reduced.

In order to solve the above-mentioned problems, as shown in fig. 1 and 2, the steam ablation system provided in this embodiment further includes a pressure release device 4, the sterile water delivery device 3 can supply sterile water to the steam device 2 at a constant flow rate, when the ablation needle 1 is pushed out relative to the steam device 2 and the inlet tube 7 under the driving of the driving system 6, the steam discharged from the steam device 2 is discharged to the tissue of the prostate hyperplasia of the patient through the ablation needle 1, so as to realize thermal ablation on the tissue, and when the ablation needle 1 is retracted relative to the steam device 2 and the inlet tube 7 under the driving of the driving system 6 during a treatment interval, the steam discharged from the steam device 2 can be discharged through the pressure release device 4, so that excessive steam is prevented from being discharged from scalding the patient through the ablation needle 1. In addition, the setting of pressure release device 4 makes aseptic water conveyor 3 can be throughout with invariable velocity of flow to steam device 2 in the treatment period and treatment interval period, has avoided the emergence of the negative pressure phenomenon in the ablation needle 1 position at the treatment interval period, has also reduced the steam response time when treating next time for ablation needle 1 can produce the steam that is used for the ablation in the twinkling of an eye when treating next time, has improved treatment efficiency.

Specifically, in this embodiment, the sterile water delivery device 3 always supplies sterile water to the steaming device 2 at a flow rate of 3.0ml/min, and the pressure relief device 4 may be a pressure relief valve having a pressure of about 10psi. In addition, as shown in fig. 1 and 2, the steam ablation system further includes a waste liquid recovery device 5, the waste liquid recovery device 5 is communicated with the pressure release device 4, and when the steam inside the steam device 2 continuously generates the pressure release value reaching the pressure release valve during the treatment interval, the steam inside the steam device 2 can flow into the waste liquid recovery device 5 through the pressure release valve.

Referring now to fig. 1 and 2, a specific structure of an ablation needle 1 will be described, and as shown in fig. 1 and 2, the ablation needle 1 is a single lumen tube, the ablation needle 1 includes an ablation needle main body 11 and an ablation needle tip 12 that are connected, and by setting the ablation needle tip 12, the ablation needle 1 is facilitated to perform a puncturing operation. Specifically, the ablation needle 1 may be made of PEEK material. The length of the ablation needle 1 is about 220mm, and the inner and outer diameters of the whole ablation needle 1 are 0.76mm and 1.27mm respectively.

In order to facilitate the ablation needle 1 to extend out of the introduction tube 7, as shown in fig. 1 and 2, a through hole 713 is formed in the cavity wall of the introduction tube main body 71, the through hole 713 is located at the connection and matching position of the introduction tube main body 71 and the introduction tube tip 72, and the head of the ablation needle 1 is designed to be bent at an angle of about 90 °, so that the head of the ablation needle 1 can conveniently extend out of the introduction tube 7 through the through hole 713 in the push-out state. Specifically, in the present embodiment, the extension length of the head bending portion of the ablation needle 1 is about 12mm. In this embodiment, the hole diameter of the penetrating hole 713 is larger than the outer diameter of the head of the ablation needle 1, so that the ablation needle 1 can be pushed out and retracted relative to the penetrating hole 713.

Since the penetrating hole 713 is located at the junction and the mating position of the ingress pipe body 71 and the ingress pipe tip 72, the lens of the endoscope 8 is located at the junction and the mating position of the ingress pipe body 71 and the ingress pipe tip 72, thereby ensuring that the lens of the endoscope 8 and the head of the ablation needle 1 are arranged right opposite to each other, and ensuring that the endoscope 8 has enough space to observe the action of the ablation needle 1. Preferably, in this embodiment, the head of the ablation needle 1 is provided with a marker ring, facilitating the observation of the specific position of the head of the ablation needle 1 through the lens of the endoscope 8.

In addition, a steam hole 111 is formed in the cavity wall of the ablation needle body part 11, and when the ablation needle 1 is pushed out relative to the steam device 2, the steam device 2 opens the steam hole 111 so that steam discharged by the steam device 2 is discharged through the steam hole 111; when the ablation needle 1 is retreated relative to the steam device 2, the steam device 2 blocks the steam hole 111, so that the steam discharged by the steam device 2 can be discharged into the waste liquid recovery device 5 through the pressure relief device 4.

A further embodiment of the present application will be described with reference to fig. 1 and 2, wherein the steam device 2 includes a steam generating coil 21, a steam delivery pipe 22 and a heating coil 23, as shown in fig. 1 and 2, wherein one end of the steam generating coil 21 is communicated with the sterile water delivery device 3, the head of the steam delivery pipe 22 is opened, the steam delivery pipe 22 is inserted into a cavity inside the ablation needle 1, the heating coil 23 is enclosed on the periphery of the steam generating coil 21, and the heating coil 23 is used for heating the steam generating coil 21 so as to heat the sterile water inside the steam generating coil 21 to generate steam and introduce the steam into the steam delivery pipe 22. When the ablation needle 1 is required to perform thermal ablation on the prostatic hyperplasia tissue of a patient, the ablation needle 1 is pushed out relative to the steam delivery pipe 22, and at the moment, the part of the ablation needle main body part 11 provided with the steam hole 111 is far away from the steam delivery pipe 22, so that the steam delivery pipe 22 opens the steam hole 111, and steam in the steam delivery pipe 22 can be discharged through the steam hole 111 after being discharged through the head opening; when the ablation needle 1 retreats relative to the steam delivery pipe 22, the steam delivery pipe 22 is located at the cavity wall of the ablation needle main body 11 provided with the steam hole 111, so that the steam delivery pipe 22 seals the steam hole 111, at the moment, the ablation needle 1 cannot discharge steam, the pressure relief device 4 is opened, and steam inside the steam delivery pipe 22 can be completely discharged into the waste liquid recovery device 5 through the pressure relief device 4.

Specifically, the head of the steam delivery tube 22 adopts a sloped isosceles trapezoid structure, the slope angle is about 45 degrees, when the ablation needle 1 retreats relative to the steam delivery tube 22, the head of the steam delivery tube 22 is just positioned at the joint of the ablation needle main body 11 and the ablation needle tip 12, in addition, the steam delivery tube 22 is a single-cavity straight-through tube made of PEEK capillary tubes, the inner diameter and the outer diameter of the steam delivery tube 22 are respectively 0.50mm and 0.73mm, and the length of the steam delivery tube 22 is about 230mm. The heating coil 23 is an RF coil, and the heating power of the RF coil is between 10W and 1000W. The steam generating coil 21 is made of RW Inconel625 pipe or TW Inconel625 pipe, the inner diameter of the steam generating coil 21 ranges from 0.75mm to 0.95mm, and good electrical contact is provided between adjacent turns of the steam generating coil 21.

Preferably, as shown in fig. 14, a plurality of steam holes 111 are provided on the cavity wall of the ablation needle body 11 at intervals, and when the ablation needle 1 is retracted relative to the steam delivery tube 22, the steam delivery tube 22 blocks each steam hole 111. Specifically, three steam hole groups are arranged on the cavity wall of the ablation needle main body part 11 along the circumferential direction of the cavity wall, and four steam holes 111 are arranged in each steam hole group at intervals along the axial direction of the cavity wall, so that 12 steam holes 111 are formed in the cavity wall of the ablation needle main body part 11, the aperture of each steam hole 111 is about 0.6mm, the steam discharge amount of the ablation needle 1 is ensured, and the treatment effect is also ensured. It should be noted that, in other embodiments, the specific number and arrangement of the steam holes 111 may be defined according to specific requirements.

Preferably, the steam generating coil 21 is provided with a temperature sensor for detecting the temperature of the steam generating coil 21 heated by the heating coil 23, and in principle, the temperature of steam generated in the steam generating coil 21 should be higher than 100 ℃ so that the temperature of steam discharged from the steam hole of the ablation needle is 80-110 ℃ to rapidly heat the tissue to 60-80 ℃ for ablation, thereby achieving the therapeutic effect. Specifically, the heating coil 23 heats according to the temperature value detected by the temperature sensor, thereby preventing the patient from being scalded by the excessive temperature of the steam. In the present embodiment, the temperature measuring probe of the temperature sensor is electromagnetically shielded by a metal foil, and the probe of the temperature sensor is prevented from being inductively heated by the heating coil 23.

Further, in this embodiment, the steam delivery tube 22 is in clearance fit with the cavity wall of the cavity inside the ablation needle 1, so that the ablation needle 1 can be pushed out or retracted more smoothly relative to the steam delivery tube 22, and friction between the cavity wall of the ablation needle 1 and the outer wall of the steam delivery tube 22 is reduced. Specifically, the bilateral clearance between the steam delivery tube 22 and the cavity wall of the cavity inside the ablation needle 1 is 0.03mm.

In addition, as shown in fig. 1 and 2, the steam device 2 further includes a flexible connection pipe 24, one end of the flexible connection pipe 24 is connected and conducted with the steam generating coil 21, and the other end of the flexible connection pipe 24 is connected and conducted with the steam delivery pipe 22, so that after the sterile water delivered by the sterile water delivery device 3 is introduced into the steam generating coil 21 and converted into steam, the steam is introduced into the steam delivery pipe 22 through the flexible connection pipe 24. The steam generating coil 21 and the steam delivery pipe 22 are connected and conducted through the flexible connecting pipe 24, leakage at the connecting positions is avoided in the process of the action of the ablation needle 1, the tightness of each connecting position is ensured, the difference of the inner diameters of all pipelines is reduced, and therefore condensation caused by the change of the volumes of the pipelines is avoided.

In this embodiment, the steam device 2 further comprises a sealing ring 25, the sealing ring 25 is fixed on the cavity wall at the tail of the ablation needle 1, and the sealing ring 25 is clamped between the cavity wall of the ablation needle 1 and the outer wall of the steam delivery tube 22. By providing the sealing ring 25, the steam discharged into the cavity wall of the ablation needle 1 by the steam delivery tube 22 is prevented from being discharged from the tail of the ablation needle 1. Specifically, the sealing ring 25 may be a silica gel sealing ring, and the silica gel sealing ring is in interference fit with the outer wall of the steam delivery pipe 22.

A steam ablation system according to still another embodiment of the present application has substantially the same structure as the above-described corresponding embodiment, and the steam ablation system according to the present embodiment is different from the above-described corresponding embodiment in that: the specific structure of the steaming device 2 is different.

As shown in fig. 15 to 17, the steam device 2 provided in this embodiment does not have the steam delivery pipe 22, but has the plugging ring 26, wherein one end of the steam generating coil 21 is communicated with the sterile water delivery device 3, the other end of the steam generating coil 21 is communicated with the ablation needle 1, the heating coil 23 is surrounded on the periphery of the steam generating coil 21, the heating coil 23 is used for heating the steam generating coil 21 so as to make the steam generating coil 21 discharge steam, thereby introducing the steam in the steam generating coil 21 into the cavity of the ablation needle 1, the plugging ring 26 is fixed inside the ingress pipe 7, and the plugging ring 26 is sleeved on the periphery of the ablation needle 1, when the ablation needle 1 is pushed out relative to the plugging ring 26, as shown in fig. 15, the part of the ablation needle body 11 where the steam holes 111 are opened is far away from the plugging ring 26, the steam holes 111 are opened, and the steam in the cavity of the ablation needle 1 can be discharged through the respective steam holes 111; as shown in fig. 16 and 17, when the ablation needle 1 is retracted relative to the plugging ring 26, the plugging ring 26 is located at the cavity wall of the ablation needle body 11 where the steam holes 111 are formed, so that each steam hole 111 is plugged by the plugging ring 26, at this time, the ablation needle 1 does not discharge steam, the ablation needle 1 can be connected with the pressure relief device 4, the pressure relief device 4 is opened, and steam in the cavity of the ablation needle 1 can be completely discharged into the waste liquid recovery device 5 through the pressure relief device 4.

A steam ablation system according to still another embodiment of the present application has substantially the same structure as the above-described corresponding embodiment, and the steam ablation system according to the present embodiment is different from the above-described corresponding embodiment in that: when the ablation needle 1 is retreated relative to the steam delivery tube 22, a large amount of steam in the steam delivery tube 22 is still discharged into the waste liquid recovery device 5 through the pressure relief device 4, and a small amount of steam in the steam delivery tube 22 can be discharged through the head of the ablation needle 1.

Specifically, as shown in fig. 18, the cavity wall of the ablation needle tip 12 is provided with a vent hole 121, the aperture of the vent hole 121 is smaller than that of the steam hole 111, and when the ablation needle 1 is pushed out or retreated relative to the steam delivery pipe 22, the vent hole 121 is communicated with the steam delivery pipe 22, so that a small amount of steam can be discharged through the vent hole 121 after the steam in the steam delivery pipe 22 can be discharged through the head opening. When the ablation needle 1 is retracted relative to the steam delivery tube 22, the steam delivery tube 22 is just located at the junction between the ablation needle body 11 and the ablation needle tip 12, so that the steam delivery tube 22 does not block the vent hole 121, and a large amount of steam in the steam delivery tube 22 is still discharged into the waste liquid recovery device 5 through the pressure relief device 4, and in this embodiment, the aperture range of the vent hole 121 is 0.2mm to 0.6mm.

A steam ablation system according to still another embodiment of the present application has substantially the same structure as the above embodiment, and the steam ablation system according to the present embodiment is different from the above corresponding embodiment in that:

As shown in fig. 1, a first air vent 221 is formed on the pipe wall of the steam delivery pipe 22, when the ablation needle 1 retreats relative to the steam delivery pipe 22, one of the steam vents 111 is in opposite conduction with the first air vent 221, and the remaining steam vents 111 are all blocked by the steam delivery pipe 22, so that a small amount of steam in the steam delivery pipe 22 can be discharged through the first air vent 221 and the steam vents 111 in conduction with the first air vent 221, and a large amount of steam in the steam delivery pipe 22 is still discharged into the waste liquid recovery device 5 through the pressure relief device 4.

In this embodiment, the steam hole 111 facing the first steam hole 221 is the steam hole 111 closest to the ablation tip end 12, and in other embodiments, the first steam hole 221 may be facing the steam hole 111 of another portion.

A steam ablation system according to still another embodiment of the present application has substantially the same structure as the above-described corresponding embodiment, and the steam ablation system according to the present embodiment is different from the above-described corresponding embodiment in that:

As shown in fig. 20, the cavity wall at the connection position of the ablation needle body 11 and the ablation needle tip 12 is provided with a vent hole 121, the cavity wall at the head of the vapor delivery tube 22 is provided with a second vent hole 222, and when the ablation needle 1 retreats relative to the vapor delivery tube 22, the second vent hole 222 just faces to the vent hole 121 to be conducted, so that a small amount of vapor in the vapor delivery tube 22 can be sequentially discharged through the second vent hole 222 and the vent hole 121, and a large amount of vapor in the vapor delivery tube 22 is still discharged into the waste liquid recovery device 5 through the pressure relief device 4.

Preferably, as shown in fig. 21, the cavity wall where the ablation needle body 11 and the ablation needle tip 12 are connected is provided with a plurality of ventilation holes 121 at intervals along the circumferential direction thereof, each ventilation hole 121 is provided with one second ventilation hole 222 correspondingly, and in this embodiment, two ventilation holes 121 are provided at intervals.

In addition, in the steam ablation system, during the treatment interval, most of the hot steam flows into the waste liquid recovery device through the pressure relief device 4, and the surface accessible position temperature of the pressure relief pipeline used by the waste liquid recovery device is up to about 80-100 ℃, so that the scald of a patient or an operator is easily caused in the operation, and unnecessary harm is brought. In view of this, an embodiment of the present application provides a pressure relief burn-in prevention tube 310 for use in the steam ablation system described above. The pressure release burn-proof tube 310 includes a tube body 311 and a burn-proof structure. The conduit body 311 is in communication with a steam ablation system. The anti-scalding structure is arranged on the periphery of the pipeline main body 311 to prevent the pipeline main body 311 from scalding a user. Specifically, the burn-proof structure includes a heat dissipation rib 312; one or more heat dissipation rib plates 312 are provided, and the heat dissipation rib plates 312 are provided on the outer wall of the pipe body 311.

The pipeline main body 311 is of a tubular structure, the pipeline main body 311 is communicated with the steam generating coil 21 in the steam ablation system, and hot steam in the steam generating coil 21 can enter the pipeline main body 311; and gaps are formed between any adjacent heat dissipation rib plates 312 to form a heat dissipation cavity 313, heat in the pipeline main body 311 is dissipated through the heat dissipation rib plates 312, and heat is dissipated in the heat dissipation cavity 313, so that the surface temperature of the pipeline main body 311 is effectively reduced, and scalding is avoided.

The pressure release scald-proof pipe 310 provided by the embodiment is used for a steam ablation system, and is communicated with a steam generation coil 21 in the steam ablation system through a pipeline main body 311, hot steam in the steam generation coil 21 enters the pipeline main body 311, one or more heat dissipation rib plates 312 are arranged on the outer wall of the pipeline main body 311, a heat dissipation cavity 313 is formed in a gap between the heat dissipation rib plates 312, heat of the pipeline main body 311 is dissipated in the heat dissipation cavity 313 through the surface of the heat dissipation rib plates 312, so that the temperature of the surface of the pipeline main body 311 is reduced, and the heat dissipation rib plates 312 can reduce the contact area between skin and the pipeline main body 311, thereby effectively avoiding scalding of a patient or a patient, relieving the technical problem that in the prior art, the steam flows into a waste liquid recovery device through a pressure release device 4 in a treatment interval period, and the surface temperature of the whole pressure release pipeline is higher, and the patient or the patient is easy to scald.

In the first embodiment, as shown in fig. 22 and 23, a plurality of heat dissipation rib plates 312 are sequentially connected, and the plurality of heat dissipation rib plates 312 may be integrally formed to form a single heat dissipation rib plate 312, and the single heat dissipation rib plate 312 is spirally disposed on the outer wall of the pipe body 311, so that the spiral heat dissipation rib plates 312 are formed on the outer wall of the pipe body 311, gaps between the spiral heat dissipation rib plates 312 form a heat dissipation cavity 313, and heat in the pipe body 311 is released into the external environment in the heat dissipation cavity 313 through the surface of the heat dissipation plate, so that the surface temperature of the pipe body 311 can be reduced.

In the second embodiment, as shown in fig. 24 and 25, a plurality of heat dissipation rib plates 312 are disposed at intervals along the outer circumferential direction of the pipe body 311, and the plurality of heat dissipation rib plates 312 face the center of the pipe body 311, so that the heat dissipation rib plates 312 are arranged on the outer circumferential surface of the pipe body 311 in a zigzag shape, and a heat dissipation cavity 313 is formed between two adjacent heat dissipation rib plates 312.

In the third embodiment, as shown in fig. 26 and 27, the heat radiation rib plates 312 are arranged in a ring shape, a plurality of heat radiation rib plates 312 are arranged at intervals along the axial direction of the pipe body 311, and a heat radiation cavity 313 is formed between two adjacent heat radiation rib plates 312.

Note that, in the first, second and third embodiments described above, the heat radiation rib 312 and the pipe body 311 are integrally structured.

In the fourth embodiment, as shown in fig. 28 and 29, the pressure relief burn-proof pipe 310 further includes an insulated pipeline 314; the heat insulation pipeline 314 is sleeved on the pipeline main body 311, and the plurality of heat dissipation rib plates 312 are connected with the inner wall of the heat insulation pipeline 314.

Specifically, on the basis of the first embodiment, the second embodiment or the third embodiment, a heat insulation pipeline 314 may be further provided, and the inside diameter of the heat insulation pipeline 314 is larger than the outside diameters of the pipeline main body 311 and the heat dissipation rib plate 312, so that the heat insulation pipeline 314 can be sleeved outside the pipeline main body 311, one end of the heat dissipation rib plate 312, which is far away from the heat dissipation pipeline, is connected with the heat insulation pipeline 314, so that the heat insulation pipeline 314, the heat dissipation rib plate 312 and the pipeline main body 311 form a whole, and an operator and a patient can only touch the heat insulation pipeline 314, so that scalding cannot be caused to the operator and the patient.

As shown in fig. 1, a steam ablation system according to another embodiment of the present application includes the pressure relief burn-in prevention tube 310 according to any of the above embodiments.

Further, the steam ablation system also comprises an ablation needle 1, a flexible connecting tube 24 and a steam generating coil 21; the two ends of the flexible connecting pipe 24 are respectively communicated with the ablation needle 1 and the steam generating coil 21, and the pipeline main body 311 is communicated with the flexible connecting pipe 24.

Specifically, the steam generating coil 21 communicates with the ablation needle 1 through the flexible connection pipe 24, hot steam in the steam generating coil 21 enters the ablation needle 1 through the flexible connection pipe 24, and during pressure relief, the hot steam in the flexible connection pipe 24 enters the pipe body 311, and the hot steam is discharged through the pipe body 311.

In an alternative embodiment, the steam ablation system further comprises an ingress pipe 7; the side wall of the ingress pipe 7 is provided with an opening, the end of the ablation needle 1 far away from the flexible connecting pipe 24 is provided with a steam ejection part, the steam ejection part stretches into the ingress pipe 7, the steam ejection part can penetrate out of the opening, when ablation is needed, the steam ejection part stretches out of the opening, hot steam is ejected from the porous structure of the steam ejection part to ablate tissue of a patient, and after ablation is finished, the steam ejection part is retracted into the ingress pipe 7.

In addition, the end part of the ingress pipe 7 is provided with the ingress pipe tip 72, the ingress pipe tip 72 is in a conical structure, so that the resistance applied to the ingress pipe tip 72 in the process of inserting into a human body is effectively reduced, and the ingress pipe 7 is more conveniently inserted into the human body.

Furthermore, an endoscope 8 is provided in the introduction tube 7, and one or more lumens are provided in the introduction tube 7, which lumens are sized to accommodate the endoscope 8 or camera head to provide additional viewing and feedback to the operator during use, and a marker ring may be provided on the steam ejection portion of the ablation needle 1 to allow the endoscope 8 or camera head to view whether the specific location of insertion of the ablation needle 1 into the tissue to be ablated after extending out of the introduction tube 7 is correct.

In an alternative embodiment, the steam ablation system further comprises a drive system 6; the driving force generated by the driving system 6 acts on the ablation needle 1, and the driving system 6 is used for driving the ablation needle 1 to move along the axial direction of the ingress pipe 7. In an alternative embodiment, the steam ablation system further comprises a heating portion; the heating portion is sleeved outside the steam generating coil 21, the heating portion is used for heating the steam generating coil 21, the heating portion is specifically provided with a heating coil 23, after the heating portion is electrified, the steam generating coil 21 is heated, sterile water in the steam generating coil 21 is heated, and then the sterile water is boiled to generate steam, and the hot steam enters the flexible connecting pipe 24.

According to the steam ablation system provided by the embodiment, the driving system 6 drives the steam spraying part of the head of the ablation needle 1 to extend out of the opening formed in the side wall of the ingress pipe 7, hot steam in the steam generating coil 21 is sprayed out of the steam spraying part sequentially through the flexible connecting pipe 24 and the ablation needle 1 to ablate a patient, after ablation is finished, the driving system 6 drives the ablation needle 1 to move, the steam spraying part is retracted into the ingress pipe 7, the pressure relief device 4 on the pipeline main body 311 is opened, the hot steam in the flexible connecting pipe 24 enters the pipeline main body 311, the hot steam is released through the pipeline main body 311, part of steam in the flexible connecting pipe 24 is released in an ablation interval period, and normal tissue damage caused by steam when a treatment part is switched can be avoided.

A further embodiment of the present application provides a steam ablation system control method for a steam ablation system including a steam device 2, a sterile water delivery device 3, a pressure relief device 4, and an ablation needle 1, the steam ablation system control method including the steps of:

After the steam ablation system is started, the sterile water is introduced into the steam device 2 through the sterile water conveying device 3 at a constant flow rate so that the steam device 2 can discharge steam; when the ablation needle 1 carries out thermal ablation on the tissue, the ablation needle 1 is pushed out relative to the steam device 2, and steam discharged by the steam device 2 is discharged through the ablation needle 1; when the ablation needle 1 is in the treatment gap, the ablation needle 1 is retracted relative to the steam device 2, and all steam discharged by the steam device 2 is discharged through the pressure relief device 4 or a steam part discharged by the steam device 2 is discharged through the pressure relief device 4.

According to the control method of the steam ablation system, provided by the application, during the treatment period, the ablation needle 1 discharges steam to realize thermal ablation of tissues, and during the treatment interval period, excessive steam can be prevented from being discharged out of a scalded patient through the ablation needle. In addition, the setting of pressure release device 4 makes aseptic water conveyor 3 can be throughout with invariable velocity of flow to steam device 2 in the treatment period and treatment interval period, has avoided the emergence of the negative pressure phenomenon of ablation needle position in the treatment interval period, has also reduced the steam response time when treating next time for ablation needle 1 can produce the steam that is used for the ablation in the twinkling of an eye when treating next time, has improved treatment efficiency.

The control method of the steam ablation system provided by the application can be adaptively applied to the steam ablation system in any of the above embodiments, and will not be described herein.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.

Claims

An ablation needle drive system comprising:

An ablation needle fixing device for fixing the ablation needle;

and the driving device drives the ablation needle fixing device to move so as to drive the ablation needle to move.
The drive system of claim 1, comprising:

the ablation needle fixing device is a magneto-philic inner core;

the driving device comprises a driving coil, the driving coil is arranged outside the nucleophilic inner core in a surrounding mode, and the driving coil is electrified to attract the nucleophilic inner core so as to drive the nucleophilic inner core to move relative to the driving coil.
The drive system of claim 2, wherein the drive system comprises:

A coil support having an interior cavity formed therein, the interior cavity having a first end and a second end disposed opposite along the first direction; the nucleophilic inner core is movably arranged in the inner cavity along the first direction; the driving coil is wound on the outer side of the coil support, and the driving coil is electrified to attract the magnetic core so as to provide power for the magnetic core to move towards the first end or the second end.
A drive system according to claim 3, wherein the drive system further comprises:

the first check ring is arranged at the end part of the coil bracket, which is close to the first end;

the second check ring is arranged at the end part of the coil bracket, which is close to the second end;

The first magnet is arranged on one side of the first check ring, which is away from the nucleophilic inner core;

The second magnet is arranged on one side, away from the nucleophilic inner core, of the second check ring.
The drive system of claim 4, wherein a region of the first collar corresponding to the interior cavity is extendable into the interior cavity; the second retainer ring may extend into the inner cavity in a region corresponding to the inner cavity.
The drive system according to claim 4 or 5, wherein comprising:

The first end cover is covered on one side of the first check ring, which is opposite to the coil bracket, and the first magnet is positioned in the first end cover;

The second end cover is covered on one side of the second check ring, which is opposite to the coil support, and the second magnet is positioned in the first end cover.
The drive system of any one of claims 4 to 6, wherein the magnetically permeable core at least partially overlaps the drive coil when the magnetically permeable core is engaged with the second collar in a direction in which the magnetically permeable core is moved toward the first end to drive the ablation needle into the needle.
A drive system according to any one of claims 3 to 7, wherein the drive coil is a unidirectional coil and is formed by a single coil wound on the outside of the coil support.
A drive system according to any one of claims 3 to 8, wherein in the first direction the drive coil is centrally located on the coil support or is offset to one of its ends.
A drive system according to any one of claims 3 to 8, comprising:

an ablation needle inserted into the magneto-philic inner core and extending from the first end of the inner cavity to the outside of the coil support;

and the conveying pipe is communicated with the ablation needle and extends to the outside of the coil bracket from the second end of the inner cavity.
The drive system of claim 10, wherein a socket is formed in the inner core along the first direction, the ablation needle is inserted into the socket, and a glue containing groove is further formed on the surface of the inner core, and the glue containing groove is communicated with the socket.
The drive system of claim 11, comprising: the viscose passage is arranged at the end part of the nucleophilic inner core, which faces the first end, the viscose passage is communicated with the inserting groove, and the inner diameter of the viscose passage is matched with the outer diameter of the ablation needle so as to enable the ablation needle to pass through.
The drive system according to claim 11 or 12, wherein comprising: the guide channel is arranged at the end part of the nucleophilic inner core, which faces the second end, the guide channel is communicated with the inserting groove, and the conveying pipe penetrates through the guide channel.
The drive system of any one of claims 3 to 13, wherein the coil support inner wall has a plurality of spaced apart support ribs extending in the first direction.
The drive system according to any one of claims 4 to 14, comprising: and the pull rod is arranged on the nucleophilic inner core and extends from the second end of the inner cavity to the outside of the coil bracket.
The drive system of claim 15, comprising:

the first sensor is arranged outside the coil bracket and positioned at one side of the pull rod facing the first end, and when the nucleophilic inner core moves to the first check ring, the first sensor senses the pull rod; and/or the number of the groups of groups,

The second sensor is arranged outside the coil bracket and positioned on one side of the pull rod towards the second end, and when the nucleophilic inner core moves to the second check ring, the second sensor senses the pull rod.
A steam ablation system, wherein the steam ablation system comprises the drive system of any of claims 1-16.
A pressure relief burn-in prevention tube for a steam ablation system, wherein the pressure relief burn-in prevention tube comprises a pipeline body and a burn-in prevention structure;

The pipeline main body is communicated with the steam ablation system;

the anti-scalding structure is arranged on the periphery of the pipeline main body so as to prevent the pipeline main body from scalding a user.
The pressure relief burn-proof tube of claim 18, wherein the burn-proof structure comprises a heat dissipating gusset provided with one or more and disposed on an outer wall of the tube body to reduce a surface temperature of the tube body.
The pressure relief burn-in tube of claim 18 or 19, wherein the tube body is in communication with a steam generating coil in the steam ablation system; gaps are formed between any adjacent radiating rib plates to form a radiating cavity.
The pressure relief burn-in prevention tube of claim 20, wherein a plurality of the heat dissipating webs are connected in sequence and disposed in a spiral on the outer wall of the tube body.
The pressure relief burn-in prevention tube of claim 20, wherein a plurality of the heat dissipating ribs are disposed at intervals along an outer circumferential direction of the tube body, and wherein the plurality of heat dissipating ribs are each oriented toward a center of the tube body.
The pressure relief burn-in prevention tube of claim 20, wherein the heat dissipating rib is configured in a ring shape, and a plurality of the heat dissipating ribs are disposed at intervals along an axial direction of the tube body.
The pressure relief burn resistant tube of any one of claims 19 to 23 wherein the pressure relief burn resistant tube further comprises an insulated conduit; the heat insulation pipeline is sleeved on the pipeline main body, and the heat dissipation rib plates are connected with the inner wall of the heat insulation pipeline.
A steam ablation system, wherein the steam ablation system comprises the pressure relief burn tube of any of claims 18-24.
The steam ablation system of claim 25, wherein the steam ablation system comprises an ablation needle, a flexible connection tube, and a steam generation coil; and two ends of the flexible connecting pipe are respectively communicated with the ablation needle and the steam generating coil, and the pipeline main body is communicated with the flexible connecting pipe.
The steam ablation system of claim 26, wherein,

The steam ablation system further comprises an ingress pipe;

The side wall of the ingress pipe is provided with an opening, the end part of the ablation needle, which is far away from the flexible connecting pipe, is provided with a steam ejection part, the steam ejection part stretches into the ingress pipe, and the steam ejection part can stretch into or stretch out through the opening.
The steam ablation system of claim 27, wherein the steam ablation system further comprises a drive member; the driving force generated by the driving member acts on the ablation needle, and the driving member is used for driving the ablation needle to move along the axial direction of the ingress pipe.
The steam ablation system of any of claims 26 to 28, wherein the steam ablation system further comprises a heating portion; the heating part is sleeved outside the steam generating coil, and is used for heating the steam generating coil.
A steam ablation system, comprising:

a steam device;

A sterile water delivery device configured to deliver sterile water to the steam device at a constant flow rate to cause the steam device to expel steam;

The pressure relief device and the ablation needle can be pushed out or retracted relative to the steam device; when the ablation needle is pushed out relative to the steam device, the steam exhausted by the steam device is exhausted through the ablation needle; when the ablation needle is retracted relative to the vapor device, the vapor expelled by the vapor device can be expelled through the pressure relief device.
The steam ablation system of claim 30, wherein a steam hole is formed in a cavity wall of the ablation needle, the steam device opening the steam hole when the ablation needle is pushed out relative to the steam device to allow the steam expelled by the steam device to be expelled through the steam hole; when the ablation needle is retracted relative to the vapor device, the vapor device blocks the vapor hole so that the vapor discharged by the vapor device can be discharged through the pressure relief device.
The steam ablation system of claim 31, wherein the steam device comprises:

One end of the steam generating coil is communicated with the sterile water conveying device, and the other end of the steam generating coil is communicated with the ablation needle;

A heating coil, surrounding the outer periphery of the steam generating coil, configured to heat the steam generating coil so that the steam generating coil discharges the steam; and

The plugging ring is sleeved on the periphery of the ablation needle;

When the ablation needle is pushed out relative to the plugging ring, the plugging ring opens the steam hole; when the ablation needle is retreated relative to the blocking ring, the blocking ring blocks the steam hole.
The steam ablation system of claim 31, wherein the steam device comprises:

a steam generating coil, one end of which is communicated with the sterile water conveying device;

The head of the steam conveying pipe is in an opening shape, the steam conveying pipe penetrates through the cavity in the ablation needle, the steam conveying pipe is connected with the pressure relief device, the heating coil is arranged on the periphery of the steam generating coil in a surrounding mode and is configured to heat the steam generating coil so that the steam generating coil generates steam and is led into the steam conveying pipe;

When the ablation needle is pushed out relative to the steam delivery tube, the steam delivery tube opens the steam hole; when the ablation needle is retreated relative to the steam delivery pipe, the steam delivery pipe seals the steam hole.
The steam ablation system of claim 33, wherein the steam delivery tube is a clearance fit with a wall of the ablation needle interior cavity.
The steam ablation system of claim 33, wherein the steam device further comprises: and one end of the flexible connecting pipe is connected and communicated with the steam generating coil pipe, and the other end of the flexible connecting pipe is connected and communicated with the steam conveying pipe.
The steam ablation system of claim 33, wherein the steam device further comprises: the sealing ring is fixed on the cavity wall at the tail part of the ablation needle and is clamped between the cavity wall of the ablation needle and the outer wall of the steam delivery pipe.
The steam ablation system of any of claims 31 to 36, wherein a plurality of said steam holes are spaced apart on a lumen wall of said ablation needle, said steam device blocking each of said steam holes when said ablation needle is retracted relative to said steam device.
The steam ablation system of any of claims 33 to 36, wherein a plurality of steam holes are formed in a cavity wall of the ablation needle at intervals, a first vent hole is formed in a wall of the steam delivery pipe, and when the ablation needle retreats relative to the steam delivery pipe, at least one steam hole is in opposite conduction with the first vent hole, and the rest steam holes are blocked by the steam delivery pipe.
The steam ablation system of any of claims 33 to 36, wherein the lumen wall of the ablation needle is further provided with vent holes, the vent holes being in communication with the steam delivery tube when the ablation needle is pushed out or retracted relative to the steam delivery tube.
The steam ablation system of any of claims 30 to 36, wherein the steam ablation system further comprises:

and the waste liquid recovery device is communicated with the pressure relief device and is configured to collect the steam discharged by the pressure relief device.
The steam ablation system of any of claims 30 to 36, further comprising:

A drive system configured to drive the ablation needle out or back relative to the vapor device.
The steam ablation system of claim 41, wherein the drive system is any of the drive systems of claims 1-16.
The steam ablation system of any of claims 30 to 42, wherein the steam ablation system further comprises:

The ablation needle is movably arranged in the first cavity in a penetrating mode, and the head of the ablation needle can penetrate through the first cavity and the second cavity to extend out of the ingress pipe; and

The endoscope is arranged in the second cavity in a penetrating way, and the lens of the endoscope is arranged opposite to the head of the ablation needle.
The steam ablation system of claim 43, wherein the head of the ablation needle is provided with a marker ring.
The steam ablation system of claim 43, wherein a gap is formed between the endoscope and a wall of the second lumen to allow the flow of irrigation saline at the gap.
A steam ablation system, comprising:

a steam device;

a sterile water delivery device configured to deliver sterile water to the steam device at a constant flow rate to cause the steam device to expel steam; and

The cavity wall of the ablation needle is provided with a steam hole, and the ablation needle can be pushed out or retracted relative to the steam device; when the ablation needle is pushed out relative to the steam device, the steam device opens the steam hole so that the steam discharged by the steam device is discharged through the steam hole; when the ablation needle is retracted relative to the vapor device, the vapor device blocks the vapor aperture.
The steam ablation system of claim 46, wherein the steam device comprises:

One end of the steam generating coil is communicated with the sterile water conveying device, and the other end of the steam generating coil is communicated with the ablation needle;

A heating coil, surrounding the outer periphery of the steam generating coil, configured to heat the steam generating coil so that the steam generating coil discharges the steam; and

The plugging ring is sleeved on the periphery of the ablation needle;

When the ablation needle is pushed out relative to the plugging ring, the plugging ring opens the steam hole; when the ablation needle is retreated relative to the blocking ring, the blocking ring blocks the steam hole.
The steam ablation system of claim 46, wherein the steam device comprises:

a steam generating coil, one end of which is communicated with the sterile water conveying device;

The head of the steam conveying pipe is in an opening shape, the steam conveying pipe penetrates through the cavity in the ablation needle, the heating coil is arranged on the periphery of the steam generating coil in a surrounding mode and is configured to heat the steam generating coil so that the steam generating coil generates steam and is led into the steam conveying pipe;

When the ablation needle is pushed out relative to the steam delivery tube, the steam delivery tube opens the steam hole; when the ablation needle is retreated relative to the steam delivery pipe, the steam delivery pipe seals the steam hole.
A method of controlling a steam ablation system for a steam ablation system comprising a steam device, a sterile water delivery device, a pressure relief device, and an ablation needle, wherein the method of controlling a steam ablation system comprises the steps of:

after the steam ablation system is started, the sterile water conveying device is used for introducing sterile water to the steam device at a constant flow rate so as to enable the steam device to discharge steam;

When the ablation is performed on the tissue, the ablation needle is pushed out relative to the steam device, and the steam exhausted by the steam device is exhausted through the ablation needle; when the ablation needle is in a treatment gap, the ablation needle is retracted relative to the vapor device, and all vapor discharged by the vapor device is discharged through the pressure relief device or a portion of the vapor discharged by the vapor device is discharged through the pressure relief device.