CN118680626A - Human body lumen collecting device, balloon catheter and thrombus taking device - Google Patents

Abstract

The invention relates to a collecting device in a human body lumen, a balloon catheter and a thrombus taking device, wherein the structure of the collecting device comprises a conveying device, a capturing net and a supporting device; the conveying device is tubular or filiform and is used for conveying the capturing net and the supporting device into the lumen of the human body; the capturing net comprises a first end and a second end, the first end is fixedly connected with the conveying device in a sealing way, and the second end is open and is used as an inlet of the capturing net; the capturing net is provided with an inner concave part, and the inner diameter of the inner concave part is smaller than the inner diameter of other sections of the capturing net; the support device is used for controlling the capturing net. According to the invention, the inner concave part is arranged on the capturing net, so that the overflow of collected thrombus, plaque and other fragments can be obviously reduced, when the collecting device is withdrawn, the supporting device is contracted, the inner concave part is closed first, the overflow of the fragments in the collecting device during contraction is reduced or avoided, the occurrence of adverse events is avoided, and the operation effect is ensured.

Description

Human body lumen collecting device, balloon catheter and thrombus taking device

Technical Field

The invention relates to the technical field of interventional medical treatment, in particular to a human body lumen collecting device, a balloon catheter and a thrombus taking device.

Background

In the interventional therapy or the morbidity of blood vessels, plaque and thrombus shedding often occurs, and along with blood circulation and flow, vascular obstruction can be caused, so that tissue necrosis or stroke can be caused.

During surgery of a shock balloon (i.e., a shock wave balloon), some emboli or plaque debris may be generated when the shock wave breaks into calcified lesions, and if the generated debris is not removed or is not completely removed, the debris may flow to different positions of the body along with blood, causing new blockage or sequelae. The generated debris is therefore typically collected and removed by providing a collection device (guard) at the distal end of the shock balloon. The collecting device is generally configured in the form of a net bag, when the shock wave balloon works, the collecting device at the far end is in a unfolding state, and when the shock wave balloon breaks up calcified parts, the broken embolic scraps flow along with blood or liquid, flow into the collecting device, and the collecting device collects generated scraps or solid matters and drags out the scraps or solid matters. In addition, a collection device can be arranged at the distal end of the thrombus removing device to collect and remove thrombus fragments or tiny thrombus blocks generated in the thrombus removing process.

Current collection devices typically retract after collecting debris, and then withdraw from the body through a catheter. During the retraction process, the debris collected in the collection device may be squeezed out, thereby resulting in incomplete collection and possible postoperative complications for the patient.

Disclosure of Invention

The invention discloses a human body lumen collecting device, a balloon catheter and a thrombus taking device, which are used for solving the technical problems in the prior art.

In one aspect, the present invention provides, in one embodiment, an intraluminal collection device for a person, comprising a delivery device, a capture net, and a support device;

The conveying device is tubular or filiform and is axially arranged at the central axis of the collecting device in the human body lumen, and the conveying device is used for conveying the capturing net and the supporting device into the human body lumen;

The capturing net comprises a first end and a second end, the first end is fixedly connected with the conveying device in a sealing way, the second end is open and is used as an inlet of the capturing net, and the first end and the second end are oppositely arranged at two axial ends of the capturing net; the capturing net is provided with an inner concave part, the inner concave part is configured into a waisted reducing section, and the inner diameter of the inner concave part is smaller than the inner diameter of other sections of the capturing net;

a support device is disposed within the capture net for controlling the capture net, wherein the control means of the capture net includes, but is not limited to, support, retraction, expansion, deployment and closure of the capture net.

As a preferred embodiment, a plurality of support devices are provided along the axial direction of the conveying device, and the outer diameter of the support device provided in the concave portion is smaller than the outer diameters of the support devices provided at other positions, so that the concave portion is configured as a waisted variable-diameter section.

As a preferable technical scheme, the supporting device comprises a plurality of net racks, wherein the net racks are in net disk shape and can radially expand, and the net racks are fixedly connected with the inner side of the capturing net and are used for controlling the capturing net;

At least one end of the net rack is connected with the conveying device in a sliding way.

As a preferred solution, the support means comprise a plurality of inflatable stents;

at least one expandable stent is disposed at the second end of the capture net, the distal end of the expandable stent is fixedly attached to the second end, and the expandable stent is at least radially expandable for controlling at least the capture net; the proximal end of the expandable stent is slidably coupled to the delivery device.

As a preferred solution, the support means comprise a shape memory material.

As a preferred technical solution, at least one supporting device is arranged in the inner concave portion, and the supporting device is fixedly connected with the inner concave portion and is used for controlling radial expansion and contraction of the inner concave portion.

As a preferred solution, both the first end and the second end of the capturing net are provided with support means.

As a preferable technical scheme, the device further comprises a control wire, wherein the distal end of the control wire is connected with the supporting device and used for controlling the supporting device to radially expand or contract, and the proximal end of the control wire is arranged along the axial direction of the conveying device and extends to the proximal end of the conveying device.

As a preferred solution, the conveyor is provided with grooves at positions corresponding to the capturing net, the grooves being recessed into the interior of the conveyor for receiving debris.

As a preferred solution, the edge of the second end of the capturing net is provided with an outward extension, which is skirt-like for abutment with the lumen inner wall.

As a preferable technical scheme, the inner side of the concave part is provided with a unidirectional film, the unidirectional film is umbrella-shaped, the large-diameter end of the unidirectional film is connected with the concave part, and the small-diameter end of the unidirectional film is open and faces the first end of the capturing net.

As a preferred embodiment, a layered inner mesh is further provided between the concave portion and the first end, the layered inner mesh having a larger mesh size than the capturing mesh.

In one aspect, the invention provides in one embodiment a balloon catheter comprising the human intraluminal collection device of any preceding claim, further comprising a balloon disposed on the delivery device, the balloon comprising a conventional balloon, a shock wave balloon, a cutting balloon or a spinous process balloon.

In one aspect, the present invention provides in one embodiment a thrombolytic device comprising an intraluminal collection device as defined in any one of the preceding claims, further comprising a catheter and/or a stent;

the catheter comprises a common catheter, a suction catheter and a thrombolysis catheter;

the bracket comprises a common bracket or a thrombus taking bracket.

The technical scheme adopted by the invention can achieve the following beneficial effects:

According to the human body lumen internal collection device provided by the embodiment of the application, the internal concave part is arranged on the capturing net, so that the overflow of collected thrombus, plaque and other fragments can be obviously reduced, when the collection device is withdrawn, the support device is contracted, the internal concave part is firstly closed, the overflow of fragments in the collection device during contraction is reduced or avoided, the occurrence of adverse events is avoided, and the operation effect is ensured.

In addition, the collecting device can be further arranged in the balloon catheter or the thrombus removing device so as to provide better debris collecting effect in the interventional operation in the fields of respiratory system, digestive system, urinary system, reproductive system, auditory canal, nervous system and coronary artery, cerebral artery, lower limb vein, aortic arch, calculus removal of valve, cardiovascular and cerebrovascular thrombolysis and the like in human blood vessels.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments are briefly described below to form a part of the present invention, and the exemplary embodiments of the present invention and the description thereof illustrate the present invention and do not constitute undue limitations of the present invention. In the drawings:

FIG. 1 is a perspective view of an intraluminal collection device according to a preferred embodiment of the present disclosure as disclosed in example 1;

FIG. 2 is a schematic view showing the structure of an intra-lumen collection device for a human body according to a preferred embodiment of the present invention disclosed in example 1;

FIG. 3 is a schematic view showing the structure of an intra-lumen collection device for a human body according to a preferred embodiment of the present invention disclosed in example 1;

FIG. 4 is a schematic view showing the structure of an intra-lumen collection device for a human body according to a preferred embodiment of the present invention disclosed in example 1;

FIG. 5 is a schematic view showing the structure of an intra-lumen collection device for a human body according to a preferred embodiment of the present invention disclosed in example 2;

Fig. 6 is a perspective view of a human intraluminal collection device according to a preferred embodiment of the present disclosure as disclosed in example 2.

Reference numerals illustrate:

A catheter 100; a capture net 200, a first end 210, a first section 211, a second end 220, a second section 221, an indent 230, an extension 240, a layered intranet 250; the rack 300, the first rack 310, the second rack 320, the third rack 330; an expandable stent 400, a fulcrum 410; control line 500; a unidirectional film 600.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. In the description of the present invention, it should be noted that the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the magnetic connection can be mechanical connection or magnetic connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art. In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In order to solve the problems existing in the prior art, the embodiment of the invention provides a human body lumen collecting device, which comprises a conveying device, a capturing net 200 and a supporting device; the conveying device is tubular or filiform and is axially arranged at the central axis of the collecting device in the human body lumen, and the conveying device is used for conveying the capturing net 200 and the supporting device into the human body lumen; the capturing net 200 comprises a first end 210 and a second end 220, the first end 210 is fixedly connected with the conveying device in a sealing way, the second end 220 is open, and the first end 210 and the second end 220 are oppositely arranged at two axial ends of the capturing net 200 as an inlet of the capturing net 200; the capturing net 200 is provided with an inner recess 230, the inner recess 230 being configured to capture a waisted reducing section of the net 200 in the axial direction, the inner diameter of the inner recess 230 being smaller than the inner diameter of the other sections of the capturing net 200; the supporting means is provided in plurality along the axial direction of the transporting means for controlling the capturing net 200.

Example 1

In the vascular intervention process, taking a shock wave balloon as an example, one or a plurality of pairs of discharge electrodes are placed in the balloon to form a set of shock wave generator, and then the electrodes are connected to a high-voltage pulse power supply host at the other end of the balloon catheter through wires. When the balloon is placed at the calcified lesion in the blood vessel, the host computer applies high-voltage electric pulse to make the pressure wave generator in the balloon release shock waves, which can destroy the calcified lesion in the blood vessel and avoid damaging the blood vessel. But can produce some emboli or plaque piece when the shock wave destroys the focus of calcification, can use string bag type collection device to collect the piece at present, but when collecting device is withdrawn from to the postoperative, need shrink to collect the netted in order to reduce its volume, increase its trafficability characteristic in the blood vessel, in the shrink in-process, open collection device often can extrude the piece of collecting, and then cause the collection of piece not thoroughly, probably can cause postoperative complication to the patient.

Referring to fig. 1 to 4, in order to solve the problems existing in the prior art, the present embodiment provides an intra-lumen collection device for collecting thrombus or plaque broken by shock waves during an interventional procedure. The structure of the human body lumen collecting device comprises a conveying device, a capturing net 200 and a supporting device, wherein the conveying device is configured into a tubular shape or a wire shape and is used for conveying the capturing net 200 into the human body lumen and enabling the capturing net 200 to finally reach a focus of a patient or other appointed positions, and preferably, the conveying device can be preset in a catheter passage in a blood vessel or other pipelines of the patient for passing; the supporting devices are axially arranged along the conveying device and are used for supporting the capturing net 200; the capturing net 200 is closed at one end and secured to the conveyor, and is open at one end, the open end being used to collect debris.

Alternatively, the delivery device may be configured as a guide wire or catheter, preferably the delivery device is a catheter 100 and is arranged at the central axis of the collecting device in the lumen of the human body, and is capable of fixing and delivering the capturing mesh 200, the supporting device, on the one hand, the catheter 100 can reach a designated position in the body of the patient under the guidance of the guide wire, on the other hand, after the guide wire is withdrawn, other interventional devices or structures may be arranged in the lumen of the catheter 100.

In a preferred embodiment, as shown in fig. 1, the capturing net 200 is in the shape of a long net bag, and a first end 210 and a second end 220 are divided along the length direction of the capturing net, the first end 210 is fixedly connected with the conveying device in a sealing way, the second end 220 is open, and as an inlet of the capturing net 200, the first end 210 and the second end 220 are oppositely arranged at two axial ends of the capturing net 200.

Preferably, the capturing net 200 is provided with an inner recess 230, the inner recess 230 being configured as a waisted reducing section, the inner diameter of the inner recess 230 being smaller than the inner diameter of the other sections of the capturing net 200. Preferably, the dimples 230 provide a radially inwardly constricted portion of the capturing net 200 such that the capturing net 200 is less prone to spilling outwardly after collecting debris in the lumen of a blood vessel, and the dimples 230 provide a barrier to debris collected by the capturing net 200.

It will be appreciated by those skilled in the art that when the first end 210 is the distal end of the capture net 200, then the second end 220 is the proximal end of the capture net 200; when the first end 210 is the proximal end of the capture net 200, then the second end 220 is the distal end of the capture net 200; in a preferred embodiment, the distal end of the capture net 200 is configured as a first end 210 and the proximal end of the capture net 200 is configured as a second end 220, and in use, the capture net 200 should be positioned distally of the shock wave balloon to collect debris and avoid escape of the debris distally.

As shown in fig. 2, the capturing net 200 is preferably divided into two sections, bounded by a recess 230, the section between the recess 230 and the first end 210 being a first section 211 and the section between the recess 230 and the second end 220 being a second section 221; preferably, first section 211 is used to collect a greater amount of debris and, when contracting the entire capture net 200, second section 221 is able to further collect the extruded debris if it is extruded from first section 211, to act as a dual safety.

In a preferred embodiment, the axial length of the first section 211 is greater than the axial length of the second section 221 in order to be able to collect a greater amount of debris.

Preferably, the maximum outer diameter of the first section 211 and the second section 221 should ensure at least an excessive fit with the vessel lumen wall, the two matching each other to prevent debris from escaping from the gap between the capture net 200 and the vessel wall; it will be appreciated by those skilled in the art that the shape and size of the blood vessels will vary from patient to patient or from lesion to lesion of the same patient, and that the size of the capture net 200, the length of the first section 211 and the second section 221, the length of the recess 230, and the outer diameter may vary as appropriate to the patient's condition.

Specifically, although the capturing net 200 is artificially divided into the first section 211, the second section 221 and the concave portion 230, it should be noted that three sections are integrally formed and smoothly transition, and the capturing net 200 can have the aforementioned three sections by different braiding methods or braiding jigs.

Preferably, the capturing net 200 is woven from metal or elastic fibers, and the specific weaving manner is not particularly limited in this embodiment.

In a preferred embodiment, support means are provided at least at the entrance and the recess 230 of the capturing net 200, such that the entrance and the recess 230 of the capturing net 200 can be opened and closed by controlling radial expansion or contraction of the support means. Those skilled in the art will appreciate that the capture net 200 is supported by the support device to effect expansion when expanded, and that the capture net 200 is radially contracted when contracted due to contraction of the support device. Taking the second section 221 as an example, the maximum diameter of the second section 221 after expansion is the outer diameter of the support device disposed at the inlet (neglecting the thickness of the capturing net 200); taking the concave portion 230 as an example, after the concave portion 230 is expanded, the maximum diameter of the concave portion 230 is the outer diameter of the support device provided in the concave portion 230.

In a preferred embodiment, the intra-body lumen collection device further comprises a control wire 500, the distal end of the control wire 500 being connected to the support means for controlling radial expansion or contraction of the support means, the proximal end of the control wire 500 being arranged axially of the delivery means and extending to the proximal end of the delivery means.

Preferably, when the capturing net 200 is retracted and withdrawn, the supporting means provided at the inlet of the capturing net 200 is first retracted by the control wire 500, so that the inlet of the capturing net 230 can be closed before the inlet is closed, and overflow of the collected debris in the capturing net 200 is reduced or avoided, and if still some of the collected debris overflows at this time, the overflowed debris enters the second section 221, and the supporting means provided at the inlet of the capturing net 200 is retracted by the control wire 500, so that the overflow of the collected debris in the second section 221 is further prevented.

In a preferred embodiment, at least two control lines 500 control two different support devices, so that the support devices can be controlled to be closed and opened separately, and the capturing net 200 can be controlled to be closed according to circumstances, so that the capturing net 200 can be controlled more flexibly.

In a preferred embodiment, the supporting means is configured as a plurality of net frames 300, the net frames 300 having a net disk shape and being radially expandable, the net frames 300 being fixedly connected to the inner side of the capturing net 200 for supporting the capturing net 200; preferably, at least one end of the rack 300 is slidably coupled to the conveyor.

Alternatively, the mesh frame 300 may be made of a shape memory metal material or other material that does not have shape memory properties; when the net frame 300 is made of a shape memory metal material, nickel-titanium alloy can be selected, after the net frame 300 is conveyed to a specified position, the net frame 300 can radially and self-expand to a prefabricated shape, and if the control wire 500 is retracted, the net frame can be controlled to be contracted; when the net frame 300 is made of a material without shape memory property, medical stainless steel or cobalt-chromium alloy can be selected, after the net frame 300 is conveyed to a designated position of a blood vessel cavity, the net frame 300 can be radially expanded by extending the control wire 500 forwards distally, and the control wire 500 can be retracted proximally to realize radial contraction.

In a preferred embodiment, the net frame 300 is made of a shape memory alloy in consideration of that the structural strength of the control wire 500 may not be sufficient to radially expand the net frame 300, and further, the shape memory alloy material has a certain elasticity and can be elastically deformed, so that the net frame 300 can be well attached to the inner wall of a blood vessel cavity when being radially expanded, thereby further increasing the efficiency of collecting the scraps in the blood vessel and avoiding the occurrence of the phenomenon of the scraps escaping.

As shown in fig. 2, the collecting device in the lumen of the human body preferably comprises a first net frame 310, a second net frame 320 and a third net frame 330, wherein the first net frame 310 is arranged at the first section 211 of the capturing net 200, the second net frame 320 is arranged at the entrance of the capturing net 200, and the third net frame 330 is arranged at the concave part 230 of the capturing net 200; more preferably, the third wire mesh 330 has an outer diameter that is smaller than the outer diameters of the first wire mesh 310 and the second wire mesh 320 to form the concave portion 230 of the capturing mesh 200, reducing the overflow of the debris collected by the first section 211; more preferably, the outer diameter of the first mesh frame 310 matches the inner diameter of the vessel lumen, and the first mesh frame 310 supports the inlet of the capturing mesh 200 so that the inlet of the capturing mesh 200 can be fitted as closely as possible to the vessel wall to maximize the collection of debris.

Alternatively, the opening of the inlet of the capturing net 200 may be directly controlled by the radial expansion of the first net frame 310, or the expansion of the inlet of the capturing net 200 may be performed after all of the first net frame 310, the second net frame 320, and the third net frame 330 are expanded.

In a preferred embodiment, the distal ends of the first, second and third wire frames 310, 320 and 330 are fixed to the delivery device, while the proximal ends are slidably connected to the delivery device, the number of control wires 500 is configured such that one control wire is fixed to each of the proximal ends of the three wire frames 300, the proximal ends of the control wires 500 extend to the handle control end of the physician, and the physician can retract the control wires 500 by controlling the operating handle, so that the first, second and third wire frames 310, 320 and 330 are contracted at the same time.

In another preferred embodiment, the distal ends of the first rack 310, the second rack 320 and the third rack 330 are fixed to the delivery device, the proximal ends are slidably connected to the delivery device, the number of the control wires 500 is three, the three control wires 500 are respectively connected to the proximal ends of the three racks 300, after the capturing net 200 collects the chips or the operation is completed, the doctor selectively controls the expansion and contraction of the different racks 300 by controlling different buttons on the operating handle, preferably, after the operation is completed, the third rack 330 is contracted first to seal the chips in the first section 211, then the second rack 320 is contracted to prevent a small amount of chips overflowing from the first section 211 from further overflowing from the second section 221 to the outside of the capturing net 200, and finally the contraction of the first rack 310 is controlled, so that the contraction degree of the first rack 310 can be selectively controlled according to the volume of the chips collected in the first section 211, a sufficient reserving space for the chips is ensured, and the chips are prevented from being excessively squeezed by the first section 211 from escaping the chips.

Preferably, the mesh size of the second mesh frame 320 and the third mesh frame 330 should be set to allow larger debris to pass through, while the mesh size of the first mesh frame 310 may or may not allow debris to pass through.

Alternatively, in the present embodiment, the number of racks 300 can be determined according to the size and axial length of the capturing net 200, but at least the racks 300 need to be provided at the recess 230 and the entrance of the capturing net 200.

In a preferred embodiment, as shown in fig. 4, the edge of the inlet of the capturing net 200 is provided with a radially outward extension 240, and the extension 240 is provided along the circumference of the inlet and is skirt-shaped and is used for being abutted against the inner wall of the lumen of the blood vessel, so that the inlet of the capturing net 200 can be more attached to the inner wall of the lumen of the blood vessel, and the escape of the chips through the gap between the inlet and the wall of the blood vessel is avoided, so that all the chips can be collected by the collecting device in the lumen of the human body. Alternatively, the skirt portion is made of a biopolymer material, such as a bio-hydrogel or a medical sealing membrane.

Preferably, the inlet of the capturing net 200 is inclined, and the angle between the inlet and the inner wall of the lumen of the blood vessel is not equal to 90 °, so that the inlet can be opened to facilitate the entry of debris.

As shown in fig. 4, preferably, the inside of the entrance of the capturing net 200 is provided with a one-way film 600, the one-way film 600 is umbrella-shaped, and the large diameter end of the one-way film 600 is connected to the entrance, and the small diameter end of the one-way film 600 is opened toward the first end 210 of the capturing net 200; more preferably, the one-way film 600 is disposed inside the concave portion 230 and has an umbrella shape, and the large diameter end of the one-way film 600 is connected to the concave portion 230, and the small diameter end of the one-way film 600 is opened toward the first end 210 of the capturing net 200.

Specifically, the opening of the unidirectional membrane 600 is disposed in the same direction as the blood flow direction, and when the debris in the collecting device in the lumen of the human body escapes in the reverse direction, the unidirectional membrane 600 can be closed to avoid the occurrence of the debris escaping under the line.

Specifically, the unidirectional film 600 is made of a biopolymer material, and specifically, the same material as that of the extension portion 240 can be selected; the structure of the one-way membrane 600 may refer to a prosthetic heart valve, formed by two or three leaflets disposed circumferentially of the capture net 200, and the multi-leaflet leaflets may open like a prosthetic heart valve and allow debris to enter when collecting debris; after the collection of debris is completed, the capture net 200 is contracted by the control wire 500, and the multi-leaflet can be passively closed when subjected to the reverse impact of debris, thereby avoiding debris spillage.

As shown in fig. 3, in a preferred embodiment, a layered inner mesh 250 is also provided between the recess 230 and the first end 210, the layered inner mesh 250 having a larger mesh size than the capturing mesh 200 such that large debris can rest on the layered inner mesh 250 and small debris can pass through the layered inner mesh 250 to the first section 211; the layered inner mesh 250 is capable of layering debris of different sizes so that debris of different sizes is distributed at different locations of the capture mesh 200, avoiding accumulation of debris in one portion, causing temporary clogging of blood vessels or other lumens.

Specifically, the layered inner net 250 may be woven from the same material as the capturing net 200, and the layered inner net 250 and the capturing net 200 are fixedly connected by stitching.

In a preferred embodiment, the delivery device is provided with grooves at locations corresponding to the capture net 200, the grooves being recessed into the interior of the delivery device for receiving debris to increase the passability of the collection device within the body lumen.

Specifically, the grooves can be regularly arranged on the conveying device in a matrix manner, and can also be staggered; when a groove is provided on the delivery device, the delivery device is a catheter 100 rather than a guidewire.

In this embodiment, when the above-mentioned collecting device in the human lumen is used, the above-mentioned collecting device in the human lumen can be delivered to the distal end of the focus through the lumen of the guide wire, the guide catheter or the shock wave balloon, the shock wave balloon releases the shock wave to destroy calcified focus in the blood vessel, meanwhile, the emboli or plaque fragments generated by the focus flow to the distal end along with the blood flow, and enter into the capturing net 200 of the collecting device in the human lumen, after the operation is finished, the shock wave balloon can be withdrawn or not withdrawn at this time, then the net rack 300 of the concave portion 230 of the capturing net 200 is contracted first by withdrawing the control wire 500 to avoid the escape of fragments from the first section 211 of the capturing net 200 (along with the impact of the blood flow, most of fragments are accumulated in the first section 211), then withdrawing the other control wire 500 to avoid the shrinkage of the net rack 300 at the entrance of the capturing net 200, if other positions of the capturing net 200 are further provided with the net rack 300, the whole capturing net 200 can be contracted one by one to expand the whole capturing net 200 radially, and then the outside of the guide catheter or the shock wave balloon is withdrawn.

It should be understood by those skilled in the art that the application scenario in the blood vessel lumen provided in this embodiment is only an example, and in fact, the above-mentioned collecting device in the human body lumen may be applied to interventional operations in various fields such as the reproductive system, the digestive system, the urinary system, the auditory canal, the nervous system, and coronary arteries, cerebral arteries, lower limb veins, aortic arch, calculus removal of valves, and cardiovascular and cerebrovascular thrombolysis in the blood vessel of the human body. .

Example 2

Taking still the example of collecting the focus debris broken by the shock wave balloon, in this embodiment, there is provided an intra-lumen collecting device for human body, which also includes a conveying device, a capturing net 200 and a supporting device, and preferably further provided with a control wire 500, unlike the above-mentioned embodiment 1, the supporting device in this embodiment is configured as a plurality of inflatable stents 400, instead of the net frame 300 in embodiment 1; other structures are the same as those of embodiment 1, and the features already described in embodiment 1 are naturally inherited in this embodiment, and will not be described again.

Referring to fig. 5 and 6, in a preferred embodiment, the support means comprises a plurality of expandable stents 400, preferably at least one expandable stent 400 is disposed at the inlet of the capture net 200, the distal end of the expandable stent 400 being fixedly connected to the inlet of the capture net 200; preferably, at least one expandable stent 400 is disposed inside the interior recess 230 of the capture net 200; the expandable stent 400 is radially expandable for supporting the capture net 200; preferably, the proximal end of the expandable stent 400 is slidably coupled to the delivery device and the distal end of the expandable stent 400 is fixedly coupled to the delivery device.

In a preferred embodiment, as shown in fig. 5, the expandable stent 400 comprises a plurality of struts, the proximal ends of the plurality of stents are converged into a ring shape, or are connected with a ring-shaped structure (not shown in the figure), the ring-shaped structure is sleeved on the conveying device and is used for sliding fit with the conveying device, the ring-shaped structure is connected with a control wire 500 (not shown in the figure, please refer to the corresponding drawing of the embodiment 1), and the radial contraction of the expandable stent 400 is realized by retracting the control wire 500; the far ends of the plurality of supporting rods are also converged annularly and fixed on the conveying device; more preferably, the struts are configured to have a bent shape with the direction of bending being radially outward, the bend forming a fulcrum 410 for supporting the capture net 200.

In a preferred embodiment, the outer diameter of the expandable stent 400 matches the inner diameter of the body lumen to ensure that the capture net 200 is able to conform closely to the vessel wall, increasing the efficiency of debris collection in the vessel.

Preferably, the expandable stent 400 disposed in the interior recess 230 has an outer diameter that is smaller than the outer diameter of the expandable stent 400 disposed elsewhere to form the interior recess 230 of the capturing net 200, reducing the occurrence of spillage of debris collected by the first section 211.

Preferably, the expandable stent 400 is made of a shape memory alloy, such as nickel titanium alloy, capable of self-expanding radially to a pre-formed shape after delivery of the expandable stent 400 to a designated location, if the retraction control wire 500 is capable of controlling the retraction thereof; further, since the shape memory alloy material has a certain elasticity, elastic deformation can be generated, so that the expandable stent 400 can be well attached to the inner wall of the blood vessel cavity when being radially expanded, the efficiency of collecting scraps in the blood vessel can be further increased, and the phenomenon of scraps escaping is avoided.

Specifically, when the capturing net 200 is in a delivery state in a guide catheter, the expandable stent 400 is in a compressed state, and when the capturing net 200 is pushed out from the guide catheter and released, the expandable stent 400 self-expands, the capturing net 200 being supported at the fulcrum 410; when the human body intraluminal collection device is withdrawn, the control wire 500 is withdrawn, so that the plurality of expandable stents 400 are contracted one by one to reduce the radial size thereof and increase the trafficability of the human body intraluminal collection device.

When a plurality of expandable stents 400 are provided, the proximal ends of the expandable stents 400 may be fixedly connected to the same control wire 500, or may be respectively connected to different control wires 500, so that a physician may selectively control the expansion and contraction of different expandable stents 400, which is not described in detail herein with reference to embodiment 1.

Preferably, after the operation is finished, the expandable stent 400 positioned in the concave portion 230 is first contracted so that the chips are enclosed in the first section 211, then the expandable stent 400 positioned at the inlet is contracted, a small amount of chips overflowed from the first section 211 is prevented from further overflowing the capturing net 200 from the second section 221, and finally the contraction of the other expandable stents 400 (such as the expandable stent 400 arranged at the first end 210) is controlled, so that the chips are ensured to have enough reserve space by selectively controlling the contraction degree of the first net frame 310 according to the volume of the chips collected by the first section 211, and the excessive extrusion of the chips by the first section 211 is prevented from being escaped.

Alternatively, in the present embodiment, the number and size of the expandable stents 400 may be determined according to the size and axial length of the capturing mesh 200, and examples are not listed herein.

In this embodiment, as shown in fig. 6, the edges of the entrance to the capturing net 200 are preferably provided with radially outward extensions 240; preferably, the inlet of the capturing net 200 is disposed obliquely, and the angle between the inlet and the inner wall of the lumen of the blood vessel is not equal to 90 °; preferably, a unidirectional film 600 is provided inside the entrance of the capturing net 200; preferably, a layered inner web 250 is also provided between the inner recess 230 and the first end 210, and the layered inner web 250 has a larger mesh size than the capturing web 200. The specific arrangement of each of the foregoing structures is as in embodiment 1, and will not be described in detail here.

It should be understood by those skilled in the art that the application scenario in the blood vessel lumen provided in this embodiment is only an example, and in fact, the above-mentioned collecting device in the human body lumen may be applied to interventional operations in various fields such as coronary artery, cerebral artery, lower limb vein, aortic arch, calculus removal of valve, cardiovascular and cerebrovascular thrombolysis in the reproductive system, auditory canal, digestive system, urinary system, nervous system and blood vessel of human body. Example 3

In this embodiment, a balloon catheter is provided, which further includes the human body intraluminal collecting device according to embodiment 1 or 2, and the technical features already included in embodiment 1 or 2 are naturally inherited in this embodiment, and are not described in detail.

Preferably, the balloon catheter comprises a balloon and an intra-lumen collection device, the balloon being disposed on a delivery device of the intra-lumen collection device, when the delivery device is configured as catheter 100, i.e. the balloon shares the same catheter with capture net 200, and both are fixed to the same catheter. Preferably, the balloon is disposed at the proximal end of the capture net 200.

In another alternative embodiment, the balloon is disposed on the catheter 100, in which case the delivery device of the human intraluminal collection device is preferably configured as a guidewire to pass through the balloon catheter.

Alternatively, the balloon in this embodiment may be a conventional balloon, a shock wave balloon, a cutting balloon, or a spinous process balloon, and when the balloon is in operation, the focal debris flows distally with the blood flow and is collected by the capture net 200, preventing the debris from escaping distally.

In this embodiment, the balloon catheter can be applied to the fields of coronary artery, cerebral artery, lower limb vein, aortic arch, calculus removal of valve, cardiovascular and cerebrovascular thrombolysis and the like in the digestive system, urinary system, reproductive system, respiratory system, lymphatic system and human blood vessels.

Example 4

In this embodiment, a thrombus taking device is provided, which further includes the human lumen collecting device in embodiment 1 or 2, and the technical features already included in embodiment 1 or 2 are naturally inherited in this embodiment, and are not described in detail.

In a preferred embodiment, the thrombolysis device further comprises a catheter, which may be a conventional catheter, an aspiration catheter, a thrombolysis catheter, in which case the delivery device of the intraluminal collection device is preferably configured as a guidewire to pass through the catheter of the thrombolysis device, and a capture net 200 is disposed at the distal end of the catheter for capturing the debris of the lesion.

In a preferred embodiment, the thrombolysis device further comprises a stent, which may be a conventional stent or a thrombolysis stent; optionally, the stent is disposed on a catheter, in which case the delivery device of the human intraluminal collection device is preferably configured as a guidewire to pass through the catheter of the thrombectomy device; alternatively, the stent and the capture net 200 share the same delivery device, where the delivery device is configured as a catheter 100, and the stent and the capture net 200 are disposed on the same catheter.

In this embodiment, the thrombus removing device can be applied to interventional operations in various fields such as coronary artery, cerebral artery, lower limb vein, aortic arch, calculus removal of valve, cardiovascular and cerebrovascular thrombolysis in the reproductive system, auditory canal, digestive system, urinary system, nervous system and blood vessels of human body.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims (10)

1. An intra-lumen collecting device for a human body, which is characterized in that,

Comprises a conveying device, a capturing net and a supporting device;

The conveying device is axially arranged at the central axis of the collecting device in the human body lumen and is used for conveying the capturing net and the supporting device into the human body lumen;

The capturing net comprises a first end and a second end, the first end is fixedly connected with the conveying device in a sealing way, the second end is open and is used as an inlet of the capturing net,

The first end and the second end are oppositely arranged at two axial ends of the capturing net; the capturing net is provided with an inner concave part, and the inner diameter of the inner concave part is smaller than the inner diameter of other sections of the capturing net;

The supporting device is arranged in the capturing net and used for controlling the capturing net;

at least one supporting device is arranged in the inner concave part, and is fixedly connected with the inner concave part and used for controlling radial expansion and contraction of the inner concave part.

2. The human intraluminal collection device of claim 1, wherein the device comprises a plurality of medical devices,

The support device is provided with a plurality of support devices along the axial direction of the conveying device, and the outer diameter of the support device arranged in the concave part is smaller than the outer diameter of the support devices arranged at other positions, so that the concave part is configured into a waisted reducing section.

3. The human body intraluminal collection device of claim 1, wherein the support means comprises a plurality of mesh frames, the mesh frames being in the shape of a mesh disc and being radially expandable, the mesh frames being fixedly connected to the inner side of the capture mesh for controlling the capture mesh;

at least one end of the net rack is in sliding connection with the conveying device.

4. The human intraluminal collection device of claim 1, wherein the support means comprises a plurality of expandable stents;

At least one of said expandable stents is disposed at said second end of said capture net, one end of said expandable stent being fixedly attached to said second end and said expandable stent being at least radially expandable for controlling at least said capture net; one end of the expandable bracket is in sliding connection with the conveying device.

5. The human intraluminal collection device of any one of claims 1-4, wherein the first end and the second end of the capture net are each provided with the support means.

6. The human intraluminal collection device of any one of claims 1-4, further comprising a control wire, a distal end of the control wire being coupled to the support means for controlling radial expansion or contraction of the support means, a proximal end of the control wire being disposed axially of the delivery means and extending to a proximal end of the delivery means.

7. The human intraluminal collection device of any one of claims 1-4, wherein an edge of the second end of the capture net is provided with an outward extension, the extension being skirt-like for abutment with an intraluminal wall.

8. The human body intraluminal collection device of any one of claims 1-4, wherein,

The inner side of the concave part is provided with a unidirectional film, the unidirectional film is umbrella-shaped, the large-diameter end of the unidirectional film is connected with the concave part, and the small-diameter end of the unidirectional film is open and faces the first end of the capturing net;

A layered inner mesh is also provided between the recess and the first end, the layered inner mesh having a larger mesh size than the capture mesh.

9. A balloon catheter comprising the human intraluminal collection device of any one of claims 1-8, further comprising a balloon disposed on the delivery device, the balloon comprising a conventional balloon, a shock wave balloon, a cutting balloon, or a spinous process balloon.

10. A thrombolysis device comprising the human intraluminal collection device of any one of claims 1-8, further comprising a catheter and/or stent;

The catheter comprises a common catheter, a suction catheter and a thrombolysis catheter;

The bracket comprises a common bracket or a thrombus taking bracket.