CN116942359A

CN116942359A - Interventional device

Info

Publication number: CN116942359A
Application number: CN202210391220.6A
Authority: CN
Inventors: 方义圣; 易博; 罗七一; 常兆华
Original assignee: Cardiopower Medtech Shanghai Co ltd
Current assignee: Cardiopower Medtech Shanghai Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2023-10-27

Abstract

The application relates to an interventional device, which comprises an artificial blood vessel, a sheath tube and a hemostatic valve. The wall of the artificial blood vessel is provided with a first interface. The first end of the sheath tube is in butt joint communication with the first interface, and the second end of the sheath tube is used for extending out of the skin. The hemostatic valve is disposed at the first end and/or the first port of the sheath. When used in interventional percutaneous devices, the percutaneous device is delivered through the second end into the sheath, through the hemostatic valve, into the vascular prosthesis, and through the vascular prosthesis into the axillary or femoral artery. Before the percutaneous equipment is inserted, the hemostatic valve is in a closed state, has good sealing performance, and can prevent the adverse phenomenon of blood loss caused by the fact that arterial blood of axillary arteries or femoral arteries enters into a sheath; after the percutaneous equipment is inserted, the cable of the percutaneous equipment is arranged in the hemostatic valve in a penetrating way, the hemostatic valve is attached to the outer wall of the cable, the hemostatic valve has good sealing performance, and the adverse phenomenon that blood is lost due to the fact that arterial blood of axillary arteries or femoral arteries enters into a sheath can be prevented.

Description

Interventional device

Technical Field

The application relates to the technical field of medical instruments, in particular to an interventional device.

Background

When high-risk percutaneous coronary intervention operation is performed, the heart of a patient is fragile, the blood supply capacity is insufficient, and the operation risk is high. Therefore, related companies develop percutaneous interventional vascular blood pumps (also called percutaneous blood pumps for short), when in actual use, the percutaneous interventional vascular blood pumps cross valves through the aorta, the inlet window is placed in the left ventricle, the outlet window is placed in the aorta, the impeller is driven by the micro motor to rotate at a high speed, blood in the left ventricle is pumped into the aorta, the blood circulation is assisted, the work load of the heart is reduced, and the high-risk percutaneous coronary intervention operation is ensured to be smoothly carried out. The intervention operation of the blood pump needs to build an intervention passage from the outside to the blood vessel through the intervention sheath, the process is long, and the bad phenomenon of blood loss easily occurs at the opening of the blood vessel.

Disclosure of Invention

The present application provides an interventional device to address one or more of the technical problems of the prior art.

The technical scheme is as follows: an interventional device, the interventional device comprising: the artificial blood vessel is provided with two ends connected with the blood vessel, and a first connector is arranged on the wall of the artificial blood vessel; the first end of the sheath is connected with the artificial blood vessel and is in butt joint communication with the first interface; and a hemostatic valve disposed within the first end of the sheath and/or at the first interface.

In one embodiment, the interventional device further comprises a one-way valve disposed at the second end of the sheath.

In one embodiment, the second end of the sheath is provided with a transparent viewing portion or a translucent viewing portion.

In one embodiment, a second connector and a connecting pipe which is in butt joint communication with the second connector are arranged on the wall of the sheath pipe, and the connecting pipe is used for being communicated with a pressure bag containing heparin.

In one embodiment, the interventional device further comprises a locking assembly coupled to the second end of the sheath for adjusting the inner diameter of the second end of the sheath.

In one embodiment, the locking assembly includes at least one fixed block and a tension member; the fixed block is fixedly connected to the outer wall of the second end, and a wire slot is formed in one side, facing the outer wall of the second end, of the fixed block; the tensioning piece is arranged in the wire slot in a penetrating mode to form a locking ring for adjusting the inner diameter of the second end.

In one embodiment, the fixing blocks are more than two and are arranged at intervals along the circumferential direction of the outer wall of the second end.

In one embodiment, the interventional device further comprises a fixation post, the tightening end of the tightening member is connected to the fixation post, and the fixation post is connected to the fixation block, the sheath, or the skin.

In one embodiment, the tightening end is in a closed ring shape and is sleeved on the fixing column.

In one embodiment, the number of the fixing columns is more than two, and the fixing columns are sequentially arranged at intervals around the periphery of the sheath tube.

In one embodiment, the inside diameter of the human hematopoietic tube is defined as D ₁ ，D ₁ Is set to 8mm-10mm.

In one embodiment, the inner diameter of the sheath is defined as D ₂ ，D ₂ Is set to be not less than 7mm.

In one embodiment, the material of the sheath is a biocompatible material; the outer wall of the sheath tube is provided with a coating for preventing tissue growth.

In one embodiment, the sheath is disposed at an angle to the vascular prosthesis, the angle between the sheath and the vascular prosthesis being defined as a, a being set to greater than 90 °.

In one embodiment, the sheath is integrally constructed with the vascular prosthesis, adhesively attached, sutured or snap-fit.

The above-described interventional device is inserted, for example, into a percutaneous apparatus, which is fed into the sheath via the second end, through the hemostatic valve, into an artificial blood vessel, and through the artificial blood vessel into an axillary or femoral artery. Because the hemostatic valve is arranged at the first end and/or the first interface of the sheath tube, the hemostatic valve is in a closed state before the percutaneous equipment is inserted, has better sealing performance, and can prevent the adverse phenomenon of blood loss caused by the arterial blood of axillary artery or femoral artery entering the sheath tube through the hemostatic valve; after the percutaneous equipment is accessed into the body, the cable of the percutaneous equipment is arranged in the hemostatic valve in a penetrating way, the hemostatic valve is attached to the outer wall of the cable, the hemostatic valve has good sealing performance, and the adverse phenomenon that the arterial blood of the axillary artery or the femoral artery enters into the sheath through the hemostatic valve to cause blood loss can be prevented.

Drawings

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

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.

FIG. 1 is a schematic diagram of an interventional device according to an embodiment of the present application;

FIG. 2 is a schematic view of a structure of a tensioning member tensioning a second end of a sheath according to an embodiment of the present application;

fig. 3 is a schematic view showing a structure of a second end of a tensioning sheath of a tensioning member according to another embodiment of the present application.

10. An artificial blood vessel; 11. a first interface; 12. a proximal end; 13. a distal end; 20. a sheath; 21. a first end; 22. a second end; 23. a second interface; 24. a connecting pipe; 30. a hemostatic valve; 40. a one-way valve; 50. a locking assembly; 51. a fixed block; 511. a wire slot; 52. a tension member; 521. a tensioning end; 60. and fixing the column.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of an interventional device according to an embodiment of the present application, and the interventional device according to an embodiment of the present application includes: vascular prosthesis 10, sheath 20, and hemostatic valve 30. The vascular prosthesis 10 has two ends connected to the blood vessel so that it can be accessed in series to the blood vessel. Wherein the blood vessel includes, but is not limited to, an axillary artery or a femoral artery. The wall of the artificial blood vessel 10 is provided with a first interface 11. The first end 21 of the sheath 20 is connected to the vascular prosthesis 10 and in abutting communication with the first port 11, and the second end 22 of the sheath 20 is adapted to extend outside the skin (not shown). A hemostatic valve 30 is disposed within the first end 21 of the sheath 20 and/or at the first port 11.

It should be noted that the specific method for serially accessing the vascular prosthesis 10 to the blood vessel (the blood vessel is exemplified by the axillary artery or the femoral artery) includes the steps of: firstly, one of axillary artery or femoral artery is taken for hemostasis to obtain a hemostasis segment; then dividing one of the hemostatic segments of the axillary or femoral artery into two segments, for example by means of a cutting operation, in other words forming an incision in the hemostatic segment; subsequently, the proximal end 12 of the artificial blood vessel 10 is sutured together end-to-end with the end on the side closer to the heart, and the distal end 13 of the artificial blood vessel 10 is sutured together end-to-end with the end on the side farther from the heart; and after the suturing is finished, restoring the blood flow of the hemostatic segment.

The interventional device includes, but is not limited to, an interventional pathway as a percutaneous device, but may also be used as an interventional pathway for other medical devices. In addition, the percutaneous apparatus in the present embodiment includes, but is not limited to, a percutaneous blood pump, and the present embodiment will be specifically described by taking an example of implantation of the percutaneous blood pump into the heart through an axillary artery or a femoral artery.

The above-described interventional device is inserted, for example, through a percutaneous device, into the vascular prosthesis 10 through the hemostatic valve 30, through the second end 22 of the sheath 20, and into the axillary or femoral artery through the vascular prosthesis 10. Because the hemostatic valve 30 is arranged at the first end 21 and/or the first interface 11 of the sheath 20, the hemostatic valve 30 is in a closed state before the percutaneous equipment is inserted, so that the hemostatic valve has better sealing performance, and the adverse phenomenon of blood loss caused by the arterial blood of the axillary artery or the femoral artery entering the sheath 20 through the hemostatic valve 30 can be prevented; after the percutaneous equipment is accessed into the body, the cable of the percutaneous equipment is arranged in the hemostatic valve 30 in a penetrating way, the hemostatic valve 30 is attached to the outer wall of the cable, the hemostatic valve has good sealing performance, and the phenomenon that arterial blood of an axillary artery or a femoral artery enters the sheath 20 through the hemostatic valve 30 to cause blood loss can be prevented.

In one embodiment, after the percutaneous apparatus is withdrawn from the heart and interventional device, the vascular prosthesis 10 may be removed from the original human blood vessel and the original human blood vessel may be re-sutured.

Referring again to fig. 1, in one embodiment, the interventional device further includes a one-way valve 40. A one-way valve 40 is disposed at the second end 22 of the sheath 20. In this way, the one-way valve 40 can ensure the sealing performance of the second end 22 of the sheath 20, and prevent the blood and/or other liquid entering the interior of the sheath 20 from flowing out through the second end 22 of the sheath 20, i.e. avoid the adverse phenomenon of blood loss.

Referring again to fig. 1, in one embodiment, the second end 22 of the sheath 20 is provided with a transparent viewing portion (not shown) or a translucent viewing portion (not shown). Thus, the transparent observation portion or the translucent observation portion of the sheath tube 20 can observe whether or not there is outflow of blood in the sheath tube 20. Wherein the transparent observation part is a part made of transparent materials. The semitransparent observation portion is a member made of semitransparent material.

The blood pressure in the artery is pulsatile, and since the artificial blood vessel 10 is connected in series to the axillary artery or the femoral artery, the hemostatic valve 20 is disposed at the first port 11 or the first end 21, that is, the hemostatic valve 30 receives the pulsatile pressure.

Referring to fig. 1, in one embodiment, a second port 23 and a connection tube 24 in butt-connection with the second port 23 are provided on the wall of the sheath 20. The connection tube 24 is adapted to extend outside the skin and communicate with a pressure bag (not shown) containing heparin. On the one hand, the hydraulic pressure provided by the pressure bag acts on one side surface of the hemostatic valve 30 to counter the pulsating blood pressure born by the other side surface of the hemostatic valve 30, so that the blood in the artificial blood vessel 10 can be prevented from flowing out to the sheath 20 through the hemostatic valve 30, and a better isolation effect is achieved. On the other hand, heparin of the pressure bag enters the sheath tube 20, and blood in the sheath tube 20 can be prevented from coagulation.

The hydraulic pressure of the pressure bag is a constant value, and the arterial blood pressure applied to the hemostatic valve 30 is also a pulsating value. In order to improve the hemostatic effect, the hydraulic pressure of the pressure bag can be correspondingly adjusted and set according to the pulsating blood pressure born by the hemostatic valve 30, so that the hydraulic pressure of the pressure bag is the average value of the upper and lower limits of arterial blood pressure, and the pressure born by the hemostatic valve 30 pulsates up and down at 0 pressure.

It should be noted that when the tightness of the hemostatic valve 30 is sufficient to prevent arterial blood inside the vascular prosthesis 10 from entering the interior of the sheath 20, it is also possible to attempt to add alcohol to the pressure bag and use the sheath 20 as a disinfection transition zone into the body.

It should be noted that, when the hemostatic valve 30 is acted on by the hydraulic pressure of the pressure bag to avoid blood loss at the hemostatic valve 30, the one-way valve 40 may not be provided at the second end 22 of the sheath 20. Of course, the check valve 40 may be synchronously disposed at the second end 22 of the sheath 20, and the check valve 40 further prevents the blood inside the sheath 20 and the liquid inside the pressure bag from flowing out through the second end 22 of the sheath 20.

It should be noted that the connection tube 24 is integrally formed with the sheath tube 20, and is connected by adhesive, suture, or clip.

It should be noted that, after the percutaneous apparatus is implanted at the preset position in the body through the interventional device, the cable passes through the second end 22 and is led out to the outside of the body to be electrically connected with the related control apparatus, so that the interventional apparatus communicates with the outside.

Referring to fig. 1 to 3, fig. 2 is a schematic diagram showing a structure of the tensioning member 52 tensioning the second end 22 of the sheath 20 according to an embodiment of the present application, and fig. 3 is a schematic diagram showing a structure of the tensioning member 52 tensioning the second end 22 of the sheath 20 according to another embodiment of the present application. In one embodiment, the interventional device further includes a locking assembly 50. A locking assembly 50 is coupled to the second end 22 of the sheath 20 for adjusting the inner diameter of the second end 22 of the sheath 20. Specifically, for example, the second end 22 is reduced in inner diameter and closely conforms to the outer wall of the cable of the percutaneous apparatus. Thus, the locking component 50 acts on the second end 22 to adjust the inner diameter of the second end 22, so that the second end 22 is tightly attached to the outer wall of the cable, on one hand, the tightness between the second end 22 and the outer wall of the cable can be ensured, and the phenomenon of blood loss caused by the outflow of blood and other liquid in the sheath 20 to the outside through the second end 22 is avoided; on the other hand, the second end 22 enables fixation of the cable, thereby enabling fixation of the transcutaneous device, i.e. positioning of the sheath 20 as a positioning part on the skin.

Referring to fig. 1-3, in one embodiment, the locking assembly 50 includes at least one securing block 51 and a tensioning member 52. The fixed block 51 is fixedly connected to the outer wall of the second end 22, and a wire slot 511 is formed in one side of the fixed block 51 facing the outer wall of the second end 22. The tightening piece 52 is inserted into the wire groove 511 to form a locking ring for adjusting the inner diameter of the second end 22, and the locking ring is specifically wound around the sheath 20. Thus, on one hand, the slot 511 plays a limiting role on the tightening piece 52, so that the tightening piece 52 is arranged on the second end 22, and the tightening piece 52 is prevented from being separated from the second end 22; on the other hand, when the inner diameter of the second end 22 needs to be reduced, the two ends of the tightening piece 52 are pulled, the collar formed by the tightening piece 52 is reduced so as to correspondingly act on the sheath 20 to reduce the inner diameter of the second end 22, and thus the tight fitting on the outer wall of the cable can be realized; conversely, when the tension member 52 is released, the second end 22 returns to its original shape under its own elastic force, and the cable can be released accordingly.

Referring to fig. 1 to 3, in one embodiment, the number of windings of the tightening member 52 on the outer wall of the second end 22 includes, but is not limited to, one, two, three or more windings, which can be flexibly set and adjusted according to practical needs, and is not limited herein.

In one embodiment, the number of the tensioning members 52 includes, but is not limited to, one, two, three or more, and can be flexibly set and adjusted according to practical needs, which is not limited herein. The locking and unlocking is achieved by a tightening piece 52 shown in fig. 2; in fig. 3, two tensioning members 52 are adopted, and the pulling parts of the two tensioning members 52 are distributed on two sides of the sheath tube, so that quick tensioning is realized.

In one embodiment, the tension member 52 includes, but is not limited to, a pulling rope, a pulling wire, a pulling chain. In addition, the tensioning member 52 includes, but is not limited to, an elastic member, a flexible member, a metal member, a plastic member, etc., and can be flexibly arranged and adjusted according to practical needs, which is not limited herein.

Referring to fig. 2 and 3, in one embodiment, the tightening member 52 may be a closed ring, or an unsealed structure, and the combination of the closed ring and the unsealed structure may be wound around the outer wall of the second end 22, and may be flexibly selected and adjusted according to practical needs, which is not limited herein.

Referring to fig. 2 and 3, in one embodiment, the fixing blocks 51 are more than two and are spaced apart along the circumferential direction of the outer wall of the second end 22. In this way, the tightening piece 52 is disposed in the slot 511 of more than two fixing blocks 51, so that the limiting effect on the tightening piece 52 is better, and the tightening piece 52 is not easy to separate from the second end 22.

Referring to fig. 2 and 3, specifically, two fixing blocks 51 are provided, one fixing block 51 is fixedly disposed on one side of the outer wall of the second end 22 around the circumferential direction of the outer wall of the second end 22, the other fixing block 51 is fixedly disposed on the other side of the outer wall of the second end 22 around the circumferential direction of the outer wall of the second end 22, and a space is reserved between the ends of the two fixing blocks 51 for the pulling end of the tensioning member 52 to pass through, so that pulling is facilitated.

In one embodiment, the material hardness of the anchor 51 is greater than the material hardness of the sheath 20. In this way, when the sheath 20 meets the requirement of the material, the fixing block 51 with high hardness is arranged outside the sheath, and the fixing block 51 is arranged on the skin to have good stability, so that the second end 22 of the sheath 20 and the cable are well stabilized.

Referring to fig. 1 and 2, in one embodiment, the interventional device further includes a fixation post 60. The tightening end 521 of the tightening member 52 is fixed to the fixing post 60, and the fixing post 60 is connected to the fixing block 51, the sheath 20 or the skin. Thus, when the tightening member 52 is tightly wound around the outer wall of the second end 22, the tightening end 521, which controls the tightness of the tightening member 52, is fixed to the fixing post 60, so that the tightening member 52 is ensured to continuously press the second end 22, so that the second end 22 is tightly fitted to the outer wall of the cable. And the tightening end 521 is removed from the fixing post 60 when the tightening piece 52 needs to be loosened.

As an alternative, the tightening end 521 of the tightening member 52 may be fixedly secured directly to the skin after the tightening member 52 is tightly wrapped around the outer wall of the second end 22.

Referring to fig. 1 and 2, in one embodiment, the tightening end 521 is in a closed loop shape and is sleeved on the fixing post 60. Thus, the tightening end 521 is in a closed ring shape, and the tightening end 521 is sleeved on the fixing column 60 to be fixed on the fixing column 60; when the tensioning piece 52 is required to be loosened, the tensioning piece 52 is separated from the fixing column 60, and the operation is convenient and quick.

Referring to fig. 1 and 2, in one embodiment, the number of the fixing posts 60 is more than two, and the fixing posts are sequentially spaced around the periphery of the sheath 20. The tightening end 521 is selectively fastened to one of the fixing posts 60. In this way, the fixing post 60 at a proper position can be correspondingly selected to fix the tightening end 521 according to the tightness of the actual requirement, so that the second end 22 can be tightly attached to the cable according to the preset pressing force. In addition, since there are more fixing posts 60 for fixing the tightening end 521, the fixing operation of the tightening end 521 is convenient.

Referring to FIG. 1, in one embodiment, the inside diameter of a vascular prosthesis 10 is defined as D ₁ ，D ₁ Is set to 8mm-10mm. Thus, the inner diameter of the artificial blood vessel 10 is approximately equal to the inner diameters of the axillary artery and the femoral artery, thereby ensuring the sealing performance of the artificial blood vessel 10 after being connected in series to the axillary artery or the femoral artery and avoiding the occurrence of blood loss at the end suture positionLike a Chinese character.

Referring to FIG. 1, in one embodiment, the inner diameter of the sheath 20 is defined as D ₂ ，D ₂ Is set to be not less than 7mm. Thus, the inner diameter of the sheath 20 is larger than the maximum outer diameter of the percutaneous apparatus, and the percutaneous apparatus can be smoothly introduced.

It should be noted that the length of the sheath 20 can be flexibly set and adjusted according to the actual requirement, and needs to be greater than the length of the axillary artery or the femoral artery to the skin, and it can be ensured that the outlet window of the percutaneous blood pump is already introduced into the sheath 20 when the inlet window of the percutaneous blood pump is introduced from the sheath 20 to the vascular prosthesis 10 through the hemostatic valve 30. This prevents blood from flowing out of the interior of the artificial blood vessel 10 through the percutaneous blood pump by way of the one-way valve 40 during the intervention of the percutaneous blood pump through the hemostatic valve 30.

In one embodiment, the sheath 20 is an elastic tube with some ability to flex. In addition, the sheath 20 is required to have a certain radial supporting ability so that the sheath 20 is prevented from being bent or contracted in the body.

In one embodiment, the material of the sheath 20 is a biocompatible material. Further, optionally, the outer wall of the sheath 20 is provided with a coating that prevents tissue growth. In this way, the risk of infection can be avoided or reduced.

Referring to fig. 1, in one embodiment, the sheath 20 is disposed at an angle to the vascular prosthesis 10, the angle between the sheath 20 and the vascular prosthesis 10 being defined as a, which is set to be greater than 90 °. Alternatively, a is set to include, but is not limited to, 100 ° -170 °, such as 120 °, 135 °, 145 °, 160 °. In this manner, the percutaneous device can be conformed to the direction of access to the vascular prosthesis 10, allowing for smooth access of the percutaneous device through the proximal end 12 into the axillary or femoral artery.

In one embodiment, the sheath 20 is integrally constructed, adhesively attached, suture attached, or snap attached to the vascular prosthesis 10.

Referring to fig. 1, in one embodiment, the above-mentioned interventional device is provided with a hemostatic valve 30, a one-way valve 40 at the second end 22, a connecting tube 24 for connecting a pressure bag at the tube wall of the sheath 20, and a locking assembly 50 at the second end 22. In this way, the blood outflow in the artificial blood vessel 10 can be prevented by the hemostatic valve 30 without inserting an interventional device; after the insertion device is installed, the hemostatic valve 30 is opened by the insertion device to affect the tightness to a certain extent, and the blood in the artificial blood vessel 10 can be prevented from flowing out into the sheath 20 by combining with the hydraulic pressure provided by the pressure bag, and in addition, the hemostatic valve is combined with the sealing function of the one-way valve 40, and the second end 22 is tightly attached to the outside of the cable by the locking assembly 50, so that the hemostatic valve can play a good role in preventing blood loss.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

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" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims

1. An interventional device, the interventional device comprising:

the artificial blood vessel is provided with two ends connected with the blood vessel, and a first connector is arranged on the wall of the artificial blood vessel;

the first end of the sheath is connected with the artificial blood vessel and is in butt joint communication with the first interface; and

a hemostasis valve disposed within the first end of the sheath and/or at the first interface.

2. The interventional device of claim 1, further comprising a one-way valve disposed at the second end of the sheath.

3. The interventional device of claim 2, wherein the second end of the sheath is provided with a transparent or translucent viewing portion.

4. The interventional device of claim 1, wherein a second port is provided on a wall of the sheath and a connection tube in abutting communication with the second port is provided for communication with a heparin-containing pressure bag.

5. The interventional device of claim 1, further comprising a locking assembly coupled to the second end of the sheath for adjusting an inner diameter of the second end of the sheath.

6. The interventional device of claim 5, wherein said locking assembly comprises at least one fixed block and a tension member; the fixed block is fixedly connected to the outer wall of the second end, and a wire slot is formed in one side, facing the outer wall of the second end, of the fixed block; the tensioning piece is arranged in the wire slot in a penetrating mode to form a locking ring for adjusting the inner diameter of the second end.

7. The interventional device of claim 6, wherein the fixation blocks are two or more and are spaced apart along the outer wall of the second end in a circumferential direction.

8. The interventional device of claim 6, further comprising a fixation post, wherein the tightening end of the tightening member is coupled to the fixation post, wherein the fixation post is coupled to the fixation block, the sheath, or the skin.

9. The interventional device of claim 8, wherein the tightening end is closed loop-shaped and fits over the fixed post.

10. The interventional device of claim 8, wherein the fixation posts are two or more and are sequentially spaced around the periphery of the sheath.

11. The interventional device of claim 1, wherein an inside diameter of said human hematopoietic vessel is defined as D ₁ ，D ₁ Is set to 8mm-10mm.

12. The interventional device of claim 1, wherein an inner diameter of the sheath is defined as D ₂ ，D ₂ Is set to be not less than 7mm.

13. The interventional device of claim 1, wherein the material of the sheath is a biocompatible material; the outer wall of the sheath tube is provided with a coating for preventing tissue growth.

14. The interventional device of claim 1, wherein said sheath is disposed at an angle to said vascular prosthesis, said angle defined by a, a being set to be greater than 90 °.

15. The interventional device of claim 1, wherein said sheath is integrally constructed with said vascular prosthesis, adhesively attached, sutured attached, or snap-fit attached.