TIPS covered stent

Abstract

The invention provides a TIPS covered stent. The TIPS covered stent comprises a stent body, a reinforcing part and a capsule. The stent main body is tubular; the support body is provided with a first channel, and the first channel is used for allowing liquid to penetrate. The inner side wall of the stent main body serves as a film covering layer; the reinforcing piece is arranged in the bracket main body and is used for reinforcing the bracket main body; the bag body is connected to the stent main body, expands during liquid filling and blocks part of the first channel, so that the pipe diameter of the first channel is gradually reduced; the bag body shrinks during liquid drainage, the first channel is gradually opened, the pipe diameter of the first channel is gradually increased, the pipe diameter of the first channel is reduced and increased in a liquid filling or liquid drainage mode, and therefore the pipe diameter of the first channel can be conveniently adjusted, and the situation that the pipe diameter of the first channel cannot be adjusted, and the pipe diameter of the first channel cannot be adjusted is avoided. Therefore, the TIPS covered stent can regulate and control the blood flow, and thrombus formation can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of TIPS covered stent, and particularly to a TIPS covered stent. BACKGROUND

[0002] With the development of science and technology, TIPS is a transjugular intrahepatic portosystemic shunt, which is a new treatment method for treating portal hypertension, esophageal and gastric variceal rupture, and intractable ascites. The basic principle is to use special interventional treatment instruments to establish an artificial shunt channel between the hepatic vein and the main branch of the portal vein under the guidance of X-ray perspective, and to maintain its permanent patency with a metal stent, so as to reduce the portal hypertension and control and prevent esophageal and gastric variceal rupture, and promote ascites absorption.

[0003] In the prior art, the existing TIPS covered stent includes a stent body and a reinforcing member. The stent body is provided with a first channel for liquid to pass through. The reinforcing member is built-in the stent body and reinforces the stent body. However, the diameter of the first channel cannot be adjusted, which leads to the fact that the existing TIPS covered stent cannot regulate the blood flow. SUMMARY

[0004] The purpose of the present application is to provide a TIPS covered stent. The stent body is in the shape of a tube. The stent body is provided with a first channel for liquid to pass through. The inner side wall of the stent body serves as a covering layer. The reinforcing member is built-in the stent body and reinforces the stent body. The capsule is connected to the stent body. The capsule expands when filled with liquid and blocks part of the first channel, so that the diameter of the first channel gradually decreases. The capsule shrinks when the liquid is drained and gradually opens the first channel, so that the diameter of the first channel gradually increases. The diameter of the first channel is reduced and increased by means of liquid filling or draining, so as to facilitate the adjustment of the diameter of the first channel, avoid the adjustment of the diameter of the first channel, and regulate the blood flow of the TIPS covered stent, so as to reduce the formation of thrombus.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a TIPS covered stent, comprising: a stent body in the shape of a tube; the stent body is provided with a first channel for liquid to pass through; the inner side wall of the stent body serves as a covering layer; a reinforcing member built-in the stent body and reinforcing the stent body; A capsule connected to the stent body, the capsule expands when filled with liquid and blocks part of the first channel, so that the diameter of the first channel gradually decreases; the capsule shrinks when drained, and gradually opens the first channel, so that the diameter of the first channel gradually increases.

[0006] Optionally, the capsule is arranged in the stent body and connected to the inner side wall of the stent body. The capsule gradually reduces the diameter of the part of the first channel relative to the capsule when it expands. The capsule gradually increases the diameter of the part of the first channel relative to the capsule when it shrinks.

[0007] Optionally, the first channel is provided with an opening. The capsule is close to the opening and on one side of the end of the first channel where the opening is formed.

[0008] Optionally, the capsule is arranged in a long strip shape, a ring shape or a mesh shape.

[0009] Optionally, when the capsule is arranged in a long strip shape, the capsule extends along the length direction of the stent body, the capsule gradually expands to both sides along the axis of the capsule when it expands, and the diameter of the first channel gradually decreases from one side. When the capsule is in an expanded state, the cross section of the capsule is in a circular arch shape, and one end of the capsule is a circular arc end.

[0010] Optionally, when the capsule is arranged in a ring shape, the capsule is arranged along the ring direction of the stent body, the capsule gradually expands towards the axis of the stent body when it expands, the capsule approaches the axis of the stent body from all directions, and the diameter of the first channel gradually decreases from all directions. When the capsule is in an expanded state, the circumferential side wall of the capsule is arranged in a circular arc shape.

[0011] Optionally, when the capsule is arranged in a mesh shape, the capsule extends along the ring direction of the stent body, the capsule gradually expands towards the axis of the stent body when it expands, the capsule approaches the axis of the stent body from all directions, and the diameter of the first channel gradually decreases. When the capsule is in an expanded state, the circumferential side wall of the capsule is arranged in a circular arc shape.

[0012] Optionally, the reinforcing member is a ring-shaped stent and is arranged in the film layer to reinforce the stent body and the film layer. The reinforcing member extends along the length direction of the stent body and supports the film layer. The reinforcing member has a support exposed part that is exposed from the support body.

[0013] Optionally, the inner cavity of the capsule body serves as a flow storage cavity. The TIPS covered stent further comprises a liquid delivery member and a conduit, the conduit being in communication with the liquid delivery member and the capsule body; the liquid delivered by the liquid delivery member enters the flow storage cavity through the conduit. With the increase of the liquid in the flow storage cavity, the capsule body gradually expands.

[0014] Optionally, the capsule body is externally arranged on the support body and is close to one end of the support body that is provided with an opening. The capsule body can be separated from the support body, the second channel formed by the capsule body is connected to the first channel, the diameter of the second channel decreases with the expansion of the capsule body, and the diameter of the second channel increases with the contraction of the capsule body.

[0015] Compared with the prior art, the present application has the following beneficial effects: The present application provides a TIPS covered stent, the support body is in the shape of a tube; the support body is provided with a first channel for liquid to pass through; the inner side wall of the support body serves as a covered layer; a reinforcing member is internally arranged in the support body and reinforces the support body; a capsule body is connected to the support body, the capsule body expands when being filled with liquid and blocks part of the first channel, so that the diameter of the first channel gradually decreases; the capsule body contracts when being drained of liquid and gradually opens the first channel, so that the diameter of the first channel gradually increases; the diameter of the first channel is reduced and increased by means of liquid filling and draining, so as to facilitate the adjustment of the diameter of the first channel and avoid the diameter of the first channel being unable to be adjusted, so as to realize the regulation of blood flow by the TIPS covered stent and facilitate the reduction of thrombus formation. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort.

[0017] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings. In the following description, the same reference numerals represent the same parts.

[0018] Fig. 1 A schematic view of a TIPS covered stent according to one embodiment of the present application is shown.

[0019] Fig. 2A cross-sectional view of a TIPS covered stent according to an embodiment of the present application is shown.

[0020] Fig. 3 A cross-sectional view of a TIPS covered stent according to an embodiment of the present application is shown, with the capsule arranged in a long strip shape.

[0021] Fig. 4 A cross-sectional view of a TIPS covered stent according to an embodiment of the present application is shown, with the capsule arranged in a ring shape.

[0022] Fig. 5 A cross-sectional view of a TIPS covered stent according to an embodiment of the present application is shown, with the capsule arranged in a mesh shape. ACCOMPA

[0023] 100, TIPS covered stent; 10, stent body; 10a, first channel; 10b, opening; 11, covered layer; 12, stent bare part; 13, stent covered part; 20, reinforcing member; 30, capsule; 30a, flow storage cavity; 30b, drainage channel; 30c, second channel; 40, infusion member; 50, catheter. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application.

[0025] Please refer to the drawings Figs. 1-5 The embodiments of the present application provide a TIPS covered stent 100, which is used to reduce direct contact with blood, effectively reduce the risk of thrombosis, and improve the prognosis of patients.

[0026] Please refer to the drawings Figs. 1-5In the embodiment of the present application, the TIPS covered stent 100 comprises a stent body 10, a reinforcing member 20 and a capsule 30; the stent body 10 is in the shape of a tube; the stent body 10 is provided with a first channel 10a for liquid to pass through; the inner side wall of the stent body 10 serves as a covering layer 11; the reinforcing member 20 is built in the stent body 10 and reinforces the stent body 10; the capsule 30 is connected to the stent body 10; the capsule 30 expands when filled with liquid and blocks part of the first channel 10a, so that the pipe diameter of the first channel 10a gradually decreases; the capsule 30 shrinks when drained and gradually opens the first channel 10a, so that the pipe diameter of the first channel 10a gradually increases; the pipe diameter of the first channel 10a is reduced and increased by means of filling or draining, so as to facilitate the adjustment of the pipe diameter of the first channel 10a, avoiding the pipe diameter of the first channel 10a being unable to be adjusted, so as to realize the TIPS covered stent 100 regulating the blood flow, so as to reduce the formation of thrombus. Optionally, TIPS is transjugular intrahepatic portosystemic shunt.

[0027] Please refer to the accompanying drawings Figs. 1-5 In the embodiment of the present application, the stent body 10 serves as the supporting component of the TIPS covered stent 100, and the stent body 10 is used to support the reinforcing member 20 and the capsule 30. The stent body 10 is in the shape of a tube; the stent body 10 is provided with a first channel 10a for liquid to pass through; so as to facilitate the blood flowing through the first channel 10a relative to the stent body 10, and the inner side wall of the stent body 10 serves as a covering layer 11.

[0028] The reinforcing member 20 is built in the stent body 10 and reinforces the stent body 10; so as to strengthen the strength of the stent body 10, avoiding the deformation of the stent body 10.

[0029] The capsule 30 is connected to the stent body 10; the capsule 30 expands when filled with liquid and blocks part of the first channel 10a, so that the pipe diameter of the first channel 10a gradually decreases; the capsule 30 shrinks when drained and gradually opens the first channel 10a, so that the pipe diameter of the first channel 10a gradually increases; the pipe diameter of the first channel 10a is reduced and increased by means of filling or draining, so as to facilitate the adjustment of the pipe diameter of the first channel 10a, avoiding the pipe diameter of the first channel 10a being unable to be adjusted, so as to realize the TIPS covered stent 100 regulating the blood flow, so as to reduce the formation of thrombus.

[0030] Please refer to the accompanying drawings Figs. 1-2In the embodiment of the present application, the capsule 30 is arranged in the stent main body 10 and connected to the inner side wall of the stent main body 10, so as to facilitate the fixation of the capsule 30 to the inner side wall of the stent main body 10. When the capsule 30 is inflated, the diameter of the part of the first channel 10a relative to the capsule 30 is gradually reduced, so as to gradually reduce the diameter of the first channel 10a with the gradual inflation of the capsule 30, so as to achieve the state of adjusting the smaller diameter of the first channel 10a. When the capsule 30 is deflated, the diameter of the part of the first channel 10a relative to the capsule 30 is gradually increased, so as to gradually increase the diameter of the first channel 10a with the gradual deflation of the capsule 30, so as to achieve the state of adjusting the larger diameter of the first channel 10a, avoiding the adjustment of the diameter of the first channel 10a, so as to achieve the regulation of the blood flow by the TIPS stent graft 100, so as to reduce the formation of thrombus.

[0031] Please refer to the accompanying drawings Figs. 1-3 In the embodiment of the present application, the first channel 10a is provided with an opening 10b; the capsule 30 is close to the opening 10b and is located on one side of the end of the first channel 10a forming the opening 10b, so as to facilitate the arrangement of the capsule 30 relative to the opening 10b, thereby facilitating the adjustment of the diameter of the opening 10b by the capsule 30, so as to facilitate the adjustment of the diameter of the first channel 10a with the adjustment of the diameter of the opening 10b. When the opening 10b is gradually increased, the diameter of the first channel 10a is gradually increased, and when the opening 10b is gradually reduced, the diameter of the first channel 10a is gradually reduced, so as to achieve the regulation of the diameter of the first channel 10a.

[0032] Please refer to the accompanying drawings Figs. 1-2 In the embodiment of the present application, the reinforcing member 20 is a ring-shaped stent and is located in the covering layer 11, so as to reinforce the stent main body 10 and the covering layer 11; the reinforcing member 20 extends along the length direction of the stent main body 10 and supports the covering layer 11; so as to facilitate the stent main body 10 to better support the covering layer 11 through the reinforcing member 20. The reinforcing member 20 has a stent exposed part 12 beyond the stent main body 10. So as to ensure that the outer diameter of the stent main body 10 remains unchanged while the capsule 30 is inflated to expand inward to regulate the diameter of the first channel 10a.

[0033] Please refer to the accompanying drawings Figs. 1-2 In the embodiment of the present application, the inner cavity of the capsule 30 serves as a flow storage cavity 30a; the TIPS stent graft 100 further comprises a liquid delivery member 40 and a catheter 50, the catheter 50 being communicated with the liquid delivery member 40 and the capsule 30; the liquid output by the liquid delivery member 40 enters the flow storage cavity 30a through the catheter 50; with the increase of the liquid in the flow storage cavity 30a, the capsule 30 gradually inflates, so as to achieve the inflation of the capsule 30 when the liquid is filled, thereby facilitating the capsule 30 to block part of the first channel 10a, so that the diameter of the first channel 10a is gradually reduced.

[0034] When the infusion member 40 draws the liquid in the storage cavity 30a through the catheter 50, the capsule 30 gradually shrinks as the liquid in the storage cavity 30a decreases, so as to realize the shrinkage of the capsule 30 during the liquid discharge, thereby facilitating the capsule 30 to gradually open the first channel 10a, and gradually increase the pipe diameter of the first channel 10a.

[0035] The stent body 10 comprises a stent bare portion 12 and a stent covering portion 13, the stent bare portion 12 is connected to the stent covering portion 13, the capsule 30 is located at the inner side wall of the stent covering portion 13, and the inner side space of the stent covering portion 13 is divided into a drainage channel 30b and a storage cavity 30a, the storage cavity 30a is used for communicating with the catheter 50, so as to inject or discharge the liquid.

[0036] In the embodiment of the present application, the capsule 30 is arranged outside the stent body 10 and close to one end of the opening 10b in the stent body 10; the capsule 30 can be separated from the stent body 10, the second channel 30c formed by the capsule 30 is connected to the first channel 10a, the pipe diameter of the second channel 30c decreases as the capsule 30 expands, and the pipe diameter of the second channel 30c increases as the capsule 30 shrinks, so as to facilitate the pipe diameter of the first channel 10a to be adjusted according to the pipe diameter of the second channel 30c.

[0037] Please refer to the accompanying drawings Figs. 3-5 In the embodiment of the present application, the capsule 30 is arranged in a long strip shape, a ring shape or a mesh shape.

[0038] Please refer to the accompanying drawings Fig. 3 When the capsule 30 is arranged in a long strip shape, the capsule 30 extends along the length direction of the stent body 10, the capsule 30 gradually expands along the axis of the capsule 30 to both sides when the capsule 30 expands, and the pipe diameter of the first channel 10a gradually decreases from one side; when the capsule 30 is in the expanded state, the cross section of the capsule 30 is in a circular arch shape, and one end of the capsule 30 is a circular arc end.

[0039] At this time, the edge of the capsule 30 is fixedly connected to the inner side wall of the covering layer 11, the drainage channel 30b is formed between the inner surface of the capsule 30 and the inner side wall of the covering layer 11, and the storage cavity 30a is formed between the outer surface of the capsule 30 and the inner side wall of the covering layer 11, so that the storage cavity 30a is located at the inner side of the drainage channel 30b, and the size of the pipe diameter of the first channel 10a is adjusted by adjusting the volume of the storage cavity 30a.

[0040] When the storage cavity 30a is filled with liquid to pressurize and expand, the capsule 30 bulges under the action of liquid filling to increase the volume of the storage cavity 30a, thereby adjusting the flow area of the drainage channel 30b to be small, so that the blood flow becomes small; when the storage cavity 30a is drained to release pressure and shrink, the capsule 30 is close to the inner side wall of the covering layer 11 to reduce the volume of the storage cavity 30a, thereby adjusting the flow area of the drainage channel 30b to be large, so that the blood flow becomes large. The pipe diameter of the first channel 10a is adjusted, and the pipe diameter of the first channel 10a cannot be adjusted to realize the TIPS covering stent 100 to regulate the blood flow, so as to reduce the formation of thrombus.

[0041] The capsule 30 extends axially on the inner side wall of the covering layer 11 to increase the overall length of the capsule 30, which is beneficial to improve the deformation ability of the capsule 30, so as to increase the regulation range of the pipe diameter of the first channel 10a.

[0042] Please refer to the accompanying drawings Fig. 4 When the capsule 30 is arranged in a ring shape, the capsule 30 is arranged along the ring direction of the stent body 10, and the capsule 30 gradually expands towards the axis of the stent body 10 when it is inflated, and the capsule 30 approaches the axis of the stent body 10 from all directions, and the pipe diameter of the first channel 10a gradually decreases from all directions; when the capsule 30 is in an inflated state, the peripheral side wall of the capsule 30 is arranged in a circular arc shape.

[0043] At this time, the edge of the capsule 30 is fixedly connected to the inner side wall of the covering layer 11, the inner surface of the capsule 30 surrounds the drainage channel 30b, and the outer surface of the capsule 30 and the inner side wall of the covering layer 11 form the storage cavity 30a, so that the storage cavity 30a surrounds the periphery of the drainage channel 30b, so as to adjust the inner diameter of the storage cavity 30a to regulate the size of the pipe diameter of the first channel 10a.

[0044] When the storage cavity 30a is filled with liquid to pressurize and expand, the capsule 30 bulges under the action of liquid filling to increase the volume of the storage cavity 30a, so that the inner diameter of the storage cavity 30a is reduced, thereby adjusting the flow area of the drainage channel 30b to be small, so that the blood flow becomes small; when the storage cavity 30a is drained to release pressure and shrink, the capsule 30 is close to the inner side wall of the covering layer 11 to reduce the volume of the storage cavity 30a, so that the inner diameter of the storage cavity 30a is increased, thereby adjusting the flow area of the drainage channel 30b to be large, so that the blood flow becomes large. The pipe diameter of the first channel 10a is adjusted, and the pipe diameter of the first channel 10a cannot be adjusted to realize the TIPS covering stent 100 to regulate the blood flow, so as to reduce the formation of thrombus.

[0045] Please refer to the accompanying drawings Fig. 5When the capsule 30 is arranged in a mesh shape, the capsule 30 extends along the annular direction of the stent body 10, and the capsule 30 gradually expands towards the axis of the stent body 10 when inflated, the capsule 30 approaches the axis of the stent body 10 from the four directions, and the pipe diameter of the first channel 10a gradually shrinks; when the capsule 30 is in an inflated state, the peripheral wall of the capsule 30 is arranged in a circular arc shape.

[0046] At this time, the edge of the capsule 30 is fixedly connected to the inner side wall of the covering layer 11, the inner surface of the capsule 30 surrounds the drainage channel 30b, and the outer surface of the capsule 30 and the inner side wall of the covering layer 11 form a flow storage cavity 30a, so that the flow storage cavity 30a surrounds the periphery of the drainage channel 30b, so as to adjust the inner diameter of the flow storage cavity 30a to regulate the size of the pipe diameter of the first channel 10a.

[0047] When the flow storage cavity 30a is filled with liquid to pressurize and expand, the capsule 30 bulges under the action of liquid filling to increase the volume of the flow storage cavity 30a, so that the inner diameter of the flow storage cavity 30a is reduced, thereby reducing the flow area of the drainage channel 30b, so that the blood flow becomes smaller; when the flow storage cavity 30a is drained to release pressure and shrink, the capsule 30 is close to the inner side wall of the covering layer 11 to reduce the volume of the flow storage cavity 30a, so that the inner diameter of the flow storage cavity 30a is increased, thereby increasing the flow area of the drainage channel 30b, so that the blood flow becomes larger. The pipe diameter of the first channel 10a is adjusted, which avoids that the pipe diameter of the first channel 10a cannot be adjusted, so as to realize the regulation of the blood flow by the TIPS covering stent 100, thereby reducing the formation of thrombus.

[0048] The axial length of the capsule 30 can be increased without the problem that the capsule 30 cannot shrink to be close to the inner side wall of the covering layer 11 after draining due to the large axial length.

[0049] Compared with the prior art, the beneficial effects of the present application are: The present application provides a TIPS covering stent 100, the stent body 10 is in the form of a pipe body; the stent body 10 is provided with a first channel 10a for liquid to pass through; the inner side wall of the stent body 10 serves as a covering layer 11; a reinforcing member 20 is built in the stent body 10 and reinforces the stent body 10; a capsule 30 is connected to the stent body 10, the capsule 30 expands when filled with liquid and blocks part of the first channel 10a, so that the pipe diameter of the first channel 10a gradually decreases; the capsule 30 shrinks when drained and gradually opens the first channel 10a, so that the pipe diameter of the first channel 10a gradually increases, the pipe diameter of the first channel 10a is reduced and increased by means of liquid filling or draining, thereby facilitating the adjustment of the pipe diameter of the first channel 10a, avoiding that the pipe diameter of the first channel 10a cannot be adjusted, so as to realize the regulation of the blood flow by the TIPS covering stent 100, thereby reducing the formation of thrombus.

[0050] It should be noted that all directional indications, such as upper, lower, left, right, front, back, under, over, upper, lower, left, right, front, back, etc., are intended to facilitate the description of the relative position relationship and movement between components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0051] It should also be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element through a middle element.

[0052] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated or implying the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the person skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0053] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made on the basis of the inventive concept of the present application, and directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A TIPS coated stent, characterized in that, include: The support body is tubular in shape; the support body has a first channel for liquid to pass through; the inner sidewall of the support body serves as a coating layer. The reinforcing component is built into the main body of the bracket and reinforces the main body of the bracket. The capsule is connected to the main body of the support. When the capsule is filled with liquid, it expands and partially blocks the first channel, causing the diameter of the first channel to gradually decrease. The bladder contracts during drainage and gradually opens the first channel, causing the diameter of the first channel to gradually increase.

2. The TIPS coated stent according to claim 1, characterized in that, The cyst is disposed within the main body of the support structure and is connected to the inner sidewall of the main body of the support structure; As the capsule expands, the diameter of the portion of the first channel relative to the capsule gradually decreases. As the capsule contracts, the diameter of the portion of the first channel relative to the capsule gradually increases.

3. The TIPS coated stent according to claim 2, characterized in that, The first channel has an opening; The capsule is located near the opening and on one side of the end that forms the opening in the first channel.

4. The TIPS coated stent according to claim 2, characterized in that, The capsules are arranged in a long strip, a ring, or a mesh.

5. The TIPS coated stent according to claim 4, characterized in that, When the capsule is arranged in a long strip shape, the capsule extends along the length of the support body. When the capsule expands, it gradually expands to both sides along the axis of the capsule, and the diameter of the first channel gradually decreases from one side. When the capsule is inflated, its cross-section is a circular arch, and one end of the capsule is an arc end.

6. The TIPS coated stent according to claim 4, characterized in that, When the bladder is arranged in a ring, the bladder is arranged along the ring direction of the support body. When the bladder expands, it gradually expands toward the axis of the support body. The bladder moves toward the axis of the support body from all directions, and the diameter of the first channel gradually decreases from all directions. When the capsule is inflated, the peripheral walls of the capsule are all arranged in an arc shape.

7. The TIPS coated stent according to claim 4, characterized in that, When the bladder is arranged in a mesh-like pattern, the bladder extends along the annular direction of the support body. When the bladder expands, it gradually expands toward the axis of the support body. The bladder moves closer to the axis of the support body from all directions, and the diameter of the first channel has a gradually shrinking shape. When the capsule is inflated, the peripheral walls of the capsule are all arranged in an arc shape.

8. The TIPS coated stent according to claim 4, characterized in that, The reinforcing member is a ring-shaped bracket and is located within the coating layer to reinforce the bracket body and the coating layer; The reinforcing member extends along the length of the support body and supports the coating layer; The reinforcement has an exposed portion of the support extending beyond the main body of the support.

9. The TIPS coated stent according to claim 1, characterized in that, The inner cavity of the capsule serves as a reservoir. The TIPS covered stent also includes an infusion device and a catheter, the catheter connecting the infusion device and the capsule; the fluid output from the infusion device enters the reservoir through the catheter; As the liquid in the reservoir increases, the capsule gradually expands.

10. The TIPS coated stent according to claim 1, characterized in that, The capsule is placed outside the support body and near one end of the opening in the support body; The capsule can detach from the support body. The second channel formed by the capsule itself connects to the first channel. The diameter of the second channel decreases as the capsule expands and increases as the capsule contracts.

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