CN218961584U - Body surface interface system combined with intravascular fistula - Google Patents

Abstract

The present utility model provides a body surface interface system for incorporation into an intravascular fistula, comprising: the artificial blood vessel is embedded in human tissue, one end of the artificial blood vessel is an arterial port and is connected with a patient autologous artery, and the other end of the artificial blood vessel is a venous port and is connected with a patient autologous vein; the 2 flat-mouth needle tube connectors are respectively and integrally connected to the artificial blood vessel, form 2 side branch structures with the artificial blood vessel, and the ports of the 2 flat-mouth needle tube connectors are exposed on the surface of the skin and are flush with the surface of the skin to form a channel for connecting the human blood vessel with the outside of the body; the flat-mouth puncture outfit comprises a flat-mouth needle tube which can be inserted on a flat-mouth needle tube connector and a needle seat for installing the flat-mouth needle tube, and the flat-mouth puncture outfit is used for connecting an extracorporeal blood pipeline. The structure combines the artificial vascular fistula, the flat-mouth puncture outfit and the flat-mouth needle tube connector, is convenient for maintenance of the internal fistula, reduces internal fistula lesions, saves vascular resources of the fistulizable patients, and prolongs the service lives of the internal fistula and the patients.

Description

Body surface interface system combined with intravascular fistula

Technical Field

The utility model relates to the field of medical instruments, in particular to a body surface interface system combined with an intravascular fistula.

Background

Hemodialysis is one of the renal replacement therapy modes for patients with acute and chronic renal failure. The method comprises the steps of draining in-vivo blood to the outside of the body, passing through a dialyzer composed of hollow fibers, and carrying out substance exchange on blood and dialysate by using the dispersion, ultrafiltration, adsorption and convection principles, so as to remove metabolic wastes in the body and maintain electrolyte and acid-base balance; at the same time, the whole process of removing excessive water from the body and reinfusion of the purified blood is called hemodialysis. The patient needs to establish a blood path for hemodialysis treatment, i.e., an intravascular fistula, which can increase blood flow rate and thicken the venous vessel wall thickness, facilitating puncture, a procedure known as fistulization.

At present, the fistulization is preferably carried out by selecting autologous arteriovenous fistula of the upper limb of a patient, namely, artificial vascular fistula, vascular fistula of the lower limb, central venous cannula and the like. Compared with artificial vascular fistula, the autologous arteriovenous fistula has small probability of occurrence of stenosis, infection and other lesions and long survival time. The central vein is a key part of a human body, the cannula is easy to be changed, the life of a patient can be endangered, the central vein is not easy to be adopted, and the central vein cannula also causes the inconvenience of the patient in movement. In long-term dialysis treatment, even autologous arteriovenous fistula can be diseased, repair is difficult, and finally, the internal fistula is abandoned and needs to be replaced with a new internal fistula. Vascular resources by which a human body can establish an autologous arteriovenous fistula are limited, and an artificial vascular fistula is also required to connect autologous blood vessels, so that the blood vessels are scarce resources; if depleted, the patient eventually fails to dialyze for treatment, which is life threatening.

In addition to the limitations of the site of fistulization, each dialysis requires the penetration of an internal fistula with a fistula needle, typically two fistula needles each. Fistula needle tubes are 1.5-1.6mm thick in diameter, and patients generally need more than twice a week for dialysis. Fistula needle puncture has serious injury to skin tissue of an internal fistula part of a patient, and the puncture is very painful when the fistula needle punctures, so that the fistula needle has great injury to the body and the mind of the patient. In addition, at present, a metal needle tube with an acute angle is mostly adopted for puncturing the skin in clinic, so that patients and nurses are easily injured by mistake, and accidental infection is caused.

Disclosure of Invention

In view of this, the present utility model is directed to a body surface interface system incorporating an intravascular fistula that incorporates an artificial vascular fistula and a flat-necked needle cannula connector that facilitates maintenance of the fistula, reduces internal fistula lesions, saves vascular resources for the fistula in the patient, and extends internal fistula and patient life.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a body surface interface system for incorporation into an intravascular fistula, comprising:

the artificial blood vessel is buried in human tissue, one end of the artificial blood vessel is an arterial port and is connected with a patient autologous artery, and the other end of the artificial blood vessel is a venous port and is connected with a patient autologous vein;

the 2 flat-mouth needle tube connectors are respectively and integrally connected to the artificial blood vessel, form 2 side branch structures with the artificial blood vessel, and the ports of the 2 flat-mouth needle tube connectors are exposed on the surface of the skin and are flush with the surface of the skin to form a channel for connecting the human blood vessel with the outside of the body; the size of the flat-mouth needle tube connector can be determined according to the thickness of subcutaneous tissue of a patient;

the flat mouth puncture outfit comprises a flat mouth needle tube which can be inserted on a flat mouth needle tube connector and a needle seat for installing the flat mouth needle tube, wherein the flat mouth puncture outfit is used for connecting an extracorporeal blood pipeline, and the flat mouth needle tube is made of medical polymer materials.

Further, the flat-mouth needle tube connector comprises a shell, a fixed ring, a one-way valve and a protective cap; one end of the shell is inserted into the artificial blood vessel and integrally formed with the artificial blood vessel, a plurality of stacked one-way valves are arranged in the shell, a fixing ring with a fixing effect is arranged above the one-way valves, a jack for inserting a flat-mouth puncture outfit is arranged in the center of the fixing ring, and a protective cap with a sealing effect is arranged above the fixing ring.

Further, the shell comprises an integrally formed shell body and a shell tail, the diameter of the shell body is larger than that of the shell tail, the shell tail is inserted into the artificial blood vessel, and a step for supporting the one-way valve is formed at the joint of the shell body and the shell tail.

Further, the port of the shell body and the port of the tail of the shell are both chamfer surfaces.

Further, the distance between the lowest end of the chamfer surface and the step in the shell body is equal to or slightly larger than the sum of the thicknesses of the fixed ring and the plurality of one-way valves.

Further, be equipped with the holding ring on the lateral wall of shell body, the holding ring buries in skin for prevent that the interface atress from removing, cause the damage to the human body.

Further, a connecting nose is arranged on the protective cap, and a through hole is arranged on the connecting nose.

The inside of the protective cap is also provided with a groove, after dialysis, the absorbent cotton immersed with disinfectant is put into the groove at the bottom of the protective cap, and then the protective cap is covered on the port of the flat-mouth needle tube connector to prevent liquid and foreign matters from entering the inside and prevent infection.

Further, the outer side wall of the flat-mouth needle tube is provided with a raised limiting table, and the fixing ring is provided with a notch for the limiting table to pass through.

Further, the fixing ring is in threaded connection with the housing.

Further, the balloon catheter also comprises a balloon catheter, the balloon end of the balloon catheter penetrates through the one-way valve and stretches into the shell, the balloon end can be used for blocking a blood vessel after being inflated, and the one-way valve can slide along the balloon catheter.

Compared with the prior art, the body surface interface system combined with the intravascular fistula has the following advantages:

(1) The body surface interface system combined with the intravascular fistula can be buried in human tissues in advance, only the port of the flat-mouth needle tube connector is leaked on the surface of the skin to form a channel outside the human vascular connector, the structure can avoid puncturing the skin, and the pain of a dialysis patient in each puncture is reduced; the damage of the metal needle tube with the puncture bevel angle to the blood vessel is avoided, the blood vessel resource is protected, the blood vessel resource of a patient is saved, the normal use of the artificial blood vessel is ensured, and the service life is prolonged.

(2) The flat needle tube connector comprises the shell, the fixed ring, the one-way valve and the protective cap, when in use, the protective cap is pulled out, and the flat needle tube sequentially penetrates through the fixed ring and the one-way valve to be inserted into the shell so as to realize connection of pipelines, and the operation is simple and convenient. After the dialysis is finished, a protective cap is covered, so that the flat-mouth needle tube connector is protected.

(3) The body surface interface system combined with the intravascular fistula can also be used for replacing and maintaining the plain-mouth needle tube connector by the balloon catheter, so that the service life of the instrument is prolonged. The flat-mouth needle tube connector can be opened, the pathological blood vessel is dredged and treated, the service life of the internal fistula is prolonged, and a new internal fistula is not required to be regenerated.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic diagram of a body surface interface system incorporating an intravascular fistula according to an embodiment of the utility model;

FIG. 2 is a schematic view of a flat-mouth needle tubing connector according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a flat-mouth needle cannula connector according to an embodiment of the present utility model;

FIG. 4 is a schematic structural view of a fixing ring according to an embodiment of the present utility model;

FIG. 5 is a block diagram of the installation of a flat-nose needle tubing connector according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a flat-nose puncture outfit according to an embodiment of the present utility model;

FIG. 7 is a cross-sectional view of a flat-nose penetrator in accordance with an embodiment of the present utility model;

fig. 8 is a diagram illustrating a use state of a body surface interface system for a vascular fistula according to an embodiment of the utility model;

FIG. 9 is a schematic diagram of the operation of replacing a check valve;

fig. 10 is a maintenance operation structure diagram of the structure.

Reference numerals illustrate:

1-artificial blood vessel; 11-arterial port; 12-venous port; 2-plain-mouth needle tubing connector; 21-a housing; 211-a housing body; 212-shell tail; 213-steps; 22-a fixed ring; 221-a jack; 222-notch; 23-a one-way valve; 24-protecting cap; 25-positioning rings; 26-connecting nose; 261-through holes; 3-flat mouth puncture outfit; 31-flat mouth needle tube; 32-needle stand; 33-a limiting table; 4-linker; 5-extracorporeal arterial side blood line; 6-extracorporeal venous side blood line; 7-patient autologous arteries; 8-patient autologous veins; 9-balloon catheter.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, 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; can be mechanically or electrically connected; 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 utility model can be understood by those of ordinary skill in the art in a specific case.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

A body surface interface system for incorporation into an intravascular fistula, comprising:

an artificial blood vessel 1 is embedded in human tissue, one end of the artificial blood vessel is an arterial port 11 and is connected with a patient autologous artery 7, and the other end of the artificial blood vessel is a venous port 12 and is connected with a patient autologous vein 8;

the 2 flat needle tube connectors 2 are respectively and integrally connected to the artificial blood vessel, form 2 side branch structures with the artificial blood vessel, and the ports of the 2 flat needle tube connectors are exposed on the surface of the skin and are level with the surface of the skin to form a channel for connecting the human blood vessel with the outside of the body;

the flat-mouth needle tube connector is made of a material with excellent biocompatibility, so that rejection reaction is reduced, service life is prolonged, the flat-mouth needle tube connector can be manufactured by a 3D printing technology, and is self-organized and naturally combined with a human body by using an interface.

Specifically, the flat-mouth needle tube connector comprises a shell 21, a fixed ring 22, a one-way valve 23 and a protective cap 24; one end of the shell is inserted into the artificial blood vessel and integrally formed with the artificial blood vessel, a plurality of stacked one-way valves are arranged in the shell, a fixing ring with a fixing effect is arranged above the one-way valves, a jack 221 for inserting a flat-mouth puncture outfit is arranged in the center of the fixing ring, and a protective cap with a sealing effect is arranged above the fixing ring. More specifically, the check valve can be 2, and the check valve can adopt soft elastic material, and the direct card can in the shell during the installation, convenient to detach and change.

The structure also comprises a balloon catheter 9, wherein the balloon end of the balloon catheter extends into the shell through the one-way valve, the balloon end can be used for blocking a blood vessel after being inflated, and the one-way valve can slide out of the shell along the balloon catheter.

After the check valve is used for many times, if the bleeding phenomenon needs to be replaced, as shown in fig. 9, the new check valve is sleeved on the balloon catheter, the balloon catheter is used to pass through the dialysis interface check valve, the balloon is used to inflate and block the blood vessel, the old check valve is taken out along the catheter, the old check valve is sheared off, and the new check valve on the catheter is placed in the dialysis interface to complete replacement.

If it is diagnosed that there is a lesion such as a blockage, a stenosis, an infection, etc. in a blood vessel near an internal fistula, as shown in fig. 10, the fixing ring is removed, and if necessary, the check valve is removed, and a catheter is inserted from the flat-mouth needle tube connector by using the existing interventional treatment technology, so that the lesion blood vessel is dredged and treated, and the service life of the internal fistula is prolonged. Such an open channel facilitates maintenance of the internal fistula.

More specifically, the housing includes an integrally formed housing body 211 and a housing tail 212, the housing body having a diameter greater than that of the housing tail, the housing tail being inserted into the interior of the artificial blood vessel, and a step 213 for supporting the check valve being formed at the junction of the housing body and the housing tail.

The port of the shell body and the port of the tail part of the shell are both chamfer surfaces, the chamfer surface of the port of the shell body is convenient to be kept flush with the skin, and the chamfer surface of the port of the tail part of the shell is convenient for the flow of blood in the artificial blood vessel.

The distance between the lowest end of the chamfer and the step in the shell body is equal to or slightly smaller than the sum of the thicknesses of the fixed ring and the plurality of one-way valves, so that the fixed ring and the one-way valves can be conveniently installed.

The retaining ring may be plugged directly into the housing or, preferably, the retaining ring is threadably connected to the housing.

The outer side wall of the shell body is provided with a positioning ring 25 which is buried in the skin and used for preventing the interface from moving under the force and damaging the human body.

The protective cap is provided with a connecting nose 26, and the connecting nose is provided with a through hole 261. If the protective cap is adhered to the flat-mouth needle tube connector and is not easy to take down, a metal wire can pass through the through hole 261 to take down the protective cap.

The inside of the protective cap is also provided with a groove, after dialysis, the absorbent cotton immersed with disinfectant is put into the groove at the bottom of the protective cap, and then the protective cap is covered on the port of the flat-mouth needle tube connector to prevent liquid and foreign matters from entering the inside and prevent infection. The outer side wall of the flat-mouth needle tube is provided with a raised limit table 33, and the fixed ring is provided with a notch 222 for the limit table to pass through. The flat needle is inserted into the notch to align the limiting table with the notch, and after the limiting table is completely inserted, the flat needle tube is rotated to stagger the limiting table and the notch, so that the flat puncture outfit is prevented from falling off during dialysis treatment.

The flat-mouth puncture outfit 3 comprises a flat-mouth needle tube 31 which can be inserted into a flat-mouth needle tube connector and a needle seat 32 for installing the flat-mouth needle tube, and the flat-mouth puncture outfit is used for connecting an extracorporeal blood pipeline, such as an extracorporeal arterial side blood pipeline 5 and an extracorporeal venous side blood pipeline 6 respectively.

The arterial port is used for leading out arterial blood, so that the arterial blood flows back to the vein of a human body after dialysis through the arterial extracorporeal blood pipeline, the dialyzer, the vein extracorporeal blood pipeline and the vein port.

The specific use principle is as follows:

the artificial blood vessel 1 is connected with the autologous artery and vein blood vessel of the patient at both ends through operation, and the operation is the mature technology at present. The artificial blood vessel 1 and the flat-mouth needle tube connector are embedded into human tissues in advance by one circle, and the ports of the two flat-mouth needle tube connectors are flush with the surface of the skin, so that the human blood vessel connector becomes a channel outside the human blood vessel connector. The positioning ring 25 on the shell is clamped in the skin and used for preventing the interface from moving under force and damaging the human body.

3-4 weeks after the operation, the internal fistula can be tried out for hemodialysis.

A flat-mouth needle connector is used for leading out blood from the artery and inputting the blood into the dialysis pipeline. Another flat-mouth needle tubing connector is used to introduce blood from the dialysis tubing into the venous blood vessel of the human body.

The body surface interface system combined with the intravascular fistula can be buried in human tissues in advance, and only the port of the flat-mouth needle tube connector is leaked on the surface of the skin to form a channel outside the human vascular connector; meanwhile, the vascular resources are protected, the vascular resources of a patient are saved, the normal use of the artificial vascular internal fistula is ensured, and the service life is prolonged.

The utility model can also be applied to continuous kidney replacement therapy (CRRT), blood perfusion or plasma exchange and other extracorporeal circulation blood purification treatments similar to hemodialysis.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A body surface interface system for use in conjunction with an intravascular fistula, comprising: comprising the following steps:

the artificial blood vessel is embedded in human tissue, one end of the artificial blood vessel is an arterial port and is connected with a patient autologous artery, and the other end of the artificial blood vessel is a venous port and is connected with a patient autologous vein;

the 2 flat-mouth needle tube connectors are respectively and integrally connected to the artificial blood vessel, form 2 side branch structures with the artificial blood vessel, and the ports of the 2 flat-mouth needle tube connectors are exposed on the surface of the skin and are flush with the surface of the skin to form a channel for connecting the human blood vessel with the outside of the body;

the flat-mouth puncture outfit comprises a flat-mouth needle tube which can be inserted on a flat-mouth needle tube connector and a needle seat for installing the flat-mouth needle tube, and the flat-mouth puncture outfit is used for connecting an extracorporeal blood pipeline.

2. The intravascular fistula-associated body surface interface system of claim 1 wherein: the flat-mouth needle tube connector comprises a shell, a fixed ring, a one-way valve and a protective cap; one end of the shell stretches into the artificial blood vessel to be communicated with the artificial blood vessel, a plurality of stacked one-way valves are arranged in the shell, a fixing ring with a fixing function is arranged above the one-way valves, a jack for inserting a flat-mouth puncture outfit is arranged in the center of the fixing ring, and a protective cap with a sealing function is arranged above the fixing ring.

3. The intravascular fistula-associated body surface interface system of claim 2 wherein: the shell includes integrated into one piece's shell body and shell afterbody, and the diameter of shell body is greater than the diameter of shell afterbody, and shell afterbody connection is in the inside of vascular prosthesis, and the junction of shell body and shell afterbody forms the step that is used for supporting the check valve.

4. The intravascular fistula-associated body surface interface system of claim 3, wherein: the port of the shell body and the port of the tail part of the shell are both chamfer surfaces.

5. The intravascular fistula-combining body surface interface system of claim 4, wherein: the distance between the lowest end of the chamfer and the step in the shell body is equal to or slightly larger than the sum of the thicknesses of the fixed ring and the plurality of one-way valves.

6. The intravascular fistula-associated body surface interface system of claim 3, wherein: the outer side wall of the shell body is provided with a positioning ring which is buried in the skin and used for preventing the interface from moving under the force and damaging the human body.

7. The intravascular fistula-associated body surface interface system of claim 2 wherein: the protective cap is provided with a connecting nose, and the connecting nose is provided with a through hole.

8. The intravascular fistula-associated body surface interface system of claim 2 wherein: the outer side wall of the flat-mouth needle tube is provided with a raised limiting table, and the fixing ring is provided with a notch for the limiting table to pass through.

9. The intravascular fistula-associated body surface interface system of claim 2 wherein: the fixed ring is in threaded connection with the shell.

10. The intravascular fistula-associated body surface interface system of claim 2 wherein: the balloon catheter also comprises a balloon catheter, the balloon end of the balloon catheter penetrates through the one-way valve to extend into the shell, the balloon end can be used for blocking a blood vessel after being inflated, and the one-way valve can slide along the balloon catheter.

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