CN115969570A - Sacculus support subassembly - Google Patents

Abstract

The application discloses sacculus support subassembly, including support, sacculus group and valve mechanism: the support is in a hollow tubular shape, and a plurality of openings are formed in the support; the balloon group is arranged in the bracket and comprises a first balloon group and a second balloon group, the position of the first balloon group corresponds to the opening, and the position of the second balloon group corresponds to the inner wall of the bracket; the valve mechanism is connected with the balloon group; wherein the first balloon group protrudes out of the opening of the stent in the filling state, and the second balloon group abuts against the inner wall of the stent in the filling state so as to support the stent.

Description

Sacculus support subassembly

Technical Field

The invention relates to the field of medical equipment, in particular to a balloon stent assembly.

Background

The ear-nose cavity of the human body is narrow, and under the condition that the human body is diseased, tissues in the ear-nose cavity can extend into the cavity, so that the problem of cavity blockage is easily caused.

In the related art, in the process of treating the ear and nasal cavity in the human body, the medical apparatus cannot effectively reach the focus position, cannot effectively expand the ear and nasal cavity, is inconvenient to pick up and cannot effectively solve the problem of blockage of the ear and nasal cavity.

Disclosure of Invention

It is an object of the present disclosure to provide a new solution for a balloon stent assembly.

According to a first aspect of the present disclosure, a balloon support assembly is provided. The sacculus bracket component comprises a bracket, a sacculus group and a valve mechanism; the support is in a hollow tubular shape, and a plurality of openings are formed in the support; the balloon group is arranged in the bracket and comprises a first balloon group and a second balloon group, the position of the first balloon group corresponds to the opening, and the position of the second balloon group corresponds to the inner wall of the bracket; the valve mechanism is connected with the balloon group; wherein the first balloon group protrudes out of the opening of the stent in the filling state, and the second balloon group abuts against the inner wall of the stent in the filling state so as to support the stent.

Optionally, the first balloon group and the second balloon group are arranged in the stent in a staggered manner.

Optionally, the first balloon set comprises a plurality of first balloons and first balloon tubes, and adjacent first balloons are connected by the first balloon tubes; the second balloon group comprises a plurality of second balloons and second balloon tubes, and the adjacent second balloons are connected through the second balloon tubes; the plurality of first balloons are staggered with the plurality of second balloons.

Optionally, the first balloon tube passes from within the adjacent second balloon; the second balloon tube passes through adjacent the first balloon.

Optionally, the valve mechanism comprises a fixed valve and a selection valve; a positioning hole is formed in the center of the fixed valve, the fixed valve is provided with two first injection holes, one of the two first injection holes is connected with the first balloon tube, and the other one of the two first injection holes is connected with the second balloon tube; the selection valve and the fixed valve form sealing, a positioning column is arranged at the center of the selection valve and rotatably connected with the positioning hole, two second injection holes and a third injection hole are arranged on the selection valve, and the third injection hole is positioned between the two second injection holes; in the first state, the two second injection holes are respectively arranged opposite to the two first injection holes; in a second state, the third injection hole is opposite to one of the first injection holes; in a third state, the two second injection holes are respectively arranged to be staggered with the two first injection holes, and the third injection hole is arranged to be staggered with the two first injection holes.

Optionally, the selection valve includes a valve body and the positioning column, the valve body includes a first wall and a second wall, the first wall and the second wall enclose a communication cavity, the positioning column is disposed on the first wall, the first wall is provided with two second injection holes and a third injection hole, the first wall is connected to the fixed valve in a sealing manner, and the second wall is provided with a fourth injection hole.

Optionally, the first wall forms a seal with the stationary valve by means of an annular sealing ring.

Optionally, the position of the fourth injection hole corresponds to the position of the positioning column.

Optionally, the scaffold is a mesh structure, and the scaffold is a degradable material.

Optionally, the stent comprises a plurality of half stents and a plurality of ribs, the half stents and the ribs enclose a hollow tubular shape, two adjacent half stents are connected through the ribs, the ribs extend along the axial direction of the stent, and the degradation speed of the ribs is greater than that of the half stents.

According to an embodiment of the present disclosure, the first balloon group is disposed at an opening of the stent, and the filled first balloon group protrudes out of the surface of the stent, so as to initially expand the ear-nose cavity, reduce the impact of the directly-opened stent on the lesion site, and increase the pain of the patient. The second balloon group is arranged in the bracket and is abutted against the inner wall of the bracket, and the filled second balloon group supports the bracket to further expand the ear and nasal passages. Through setting up first sacculus and second sacculus in the crisscross support, can expand the lesion site step by step to reduce patient's misery. The expansion degree of the first balloon group and the second balloon group is adjusted through the valve mechanism to adapt to patients with different ear-nose cavity diameters, so that the ear and nose cavity channels are effectively propped open, and the risk of adhesion inside the ear-nose cavity channels is reduced.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present disclosure.

Fig. 2 is a schematic view of a first balloon set and a second balloon set simultaneously filled in accordance with an embodiment of the present disclosure.

Fig. 3 is a schematic cross-sectional structure diagram of a balloon set in a filled state according to an embodiment of the disclosure.

Fig. 4 is a schematic cross-sectional structural view of a balloon set filling in-state according to an embodiment of the present disclosure.

Fig. 5 is a schematic cross-sectional structure view of a balloon set in a pre-filling state according to an embodiment of the disclosure.

FIG. 6 is a schematic view of a side of the selection valve away from the fixed valve according to an embodiment of the disclosure.

Fig. 7 is a schematic view of a fixed valve according to an embodiment of the disclosure.

FIG. 8 is a schematic view of a side of a selection valve adjacent to a fixed valve according to an embodiment of the disclosure.

Fig. 9 is an exploded view of a cross-sectional structure of a selection valve and a fixed valve according to an embodiment of the present disclosure.

Fig. 10 is a schematic view of a combination of cross-sectional structures of a selection valve and a fixed valve according to an embodiment of the present disclosure.

Fig. 11 is a schematic view of a stent according to an embodiment of the present disclosure.

Fig. 12 is a schematic view of a use state of an embodiment of the present disclosure.

In the figures, 1-stent; 11-opening; 12-half a scaffold; 13-ribs; 2-group of saccules; 21-a first balloon group; 211-a first balloon; 212-a first balloon tube; 22-a second balloon group; 221-a second balloon; 222-a second balloon tube; 3-a valve mechanism; 31-a fixed valve; 311-positioning holes; 32-selection valve; 312 — a first injection hole; 321-a positioning column; 322-a second injection hole; 323-third injection hole; 324-a valve body; 3241-first wall; 3242-a second wall; 3243-communicating chamber; 3244-fourth injection hole; 33-sealing ring.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The disclosed embodiment provides a balloon stent assembly, which comprises a stent 1, a balloon set 2 and a valve mechanism 3. The support 1 is in a hollow tubular shape. A plurality of openings 11 are provided on the support 1. The balloon group 2 is arranged in the bracket 1. The balloon set 2 includes a first balloon set 21 and a second balloon set 22. The first balloon group 21 is located corresponding to the opening 11. The second balloon group 22 is located corresponding to the inner wall of the stent 1. The valve mechanism 3 is connected with the balloon group 2. Wherein the first balloon group 21 protrudes out of the opening 11 of the stent 1 in the inflated state. The second balloon set 22 abuts against the inner wall of the stent 1 in the inflated state to support the stent 1.

As shown in fig. 1 to 5, the stent 1 has a hollow tubular interior for placing the balloon set 2. The first balloon group 21 corresponds to the opening 11 in the stent 1. When the first balloon group 21 is filled with gas or liquid, the first balloon group 21 protrudes from the opening 11 of the stent 1, and the opening 11 on the side wall of the stent 1 is used for opening the tissue at the lesion. The sacculus group 2 is made of flexible materials, so that the damage to skin tissues is reduced, and the pain of a patient is reduced. The second balloon group 22 abuts against the inner wall of the stent 1. When the second balloon group 22 is filled with gas or liquid, the second balloon group 22 supports the stent 1, so that the lesion site can be further expanded. The first balloon group 21 and the second balloon group 22 are matched for expansion, so that the ear-nose-cavity channel can be effectively supported, and the pain of a patient can be effectively reduced.

Of course, the balloon group 2 is not limited to the above structure in the disclosed embodiment. The balloon group 2 may be provided in plurality. A plurality of balloon sets 2 may be in contact with the stent 1 at different locations.

In one example, the first balloon group 21 and the second balloon group 22 are staggered in the stent 1.

As shown in fig. 1 to 5, the first balloon groups 21 and the second balloon groups 22 are staggered to uniformly expand the stent 1 as a whole. Avoid the situation that the local expansion of the stent 1 is larger, and the other positions of the stent 1 are not contacted with the skin tissue. And through arranging first sacculus group 21 and second sacculus group 22 with crisscross, can reduce to occupy support 1 inner space, can contract support 1 as far as possible, it is easier in the process of placing to otorhinomeatus, and reduce the misery to the patient.

In one example, the first balloon set 21 includes a plurality of first balloons 211 and a first balloon tube 212. Adjacent first balloons 211 are connected by the first balloon tube 212. The second balloon set 22 includes a plurality of second balloons 221 and a second balloon tube 222. Adjacent second balloons 221 are connected by the second balloon tube 222. The plurality of first balloons 211 are staggered with the plurality of second balloons 221.

As shown in fig. 3 to 5, the first balloon 211 and the second balloon 221 have the same shape, and both have a long strip or oval structure. The top and bottom of the first balloon 211 are respectively facing the opening 11 of the stent 1. The first balloon 221 is filled with gas or liquid. The filled first balloon 211 protrudes from the top and bottom, respectively, of the opening 11 of the stent 1 to contact with the skin tissue, thereby performing the preliminary expansion of the tissue by the first balloon 211. The top and bottom of the second balloon 221 are respectively towards the inner wall of the stent 1. The second balloon 221 is filled with gas or liquid. The top and the bottom of the filled second balloon 221 respectively abut against the inner wall of the stent 1 to support and expand the stent 1, so that the stent 1 is expanded by the second balloon 221, and tissues are further expanded.

In one example, the first balloon tube 212 passes through the adjacent second balloon 221. The second balloon tube 222 passes through the adjacent first balloon 211.

As shown in fig. 3 to 5, the first balloon 211 and the second balloon 221 are arranged inside the stent 1 in a staggered manner. The two ends of the first balloon tube 212 are respectively communicated with the adjacent first balloons 211. The two ends of the second balloon tube 222 are respectively communicated with the adjacent second balloons 221. The first balloon group 21 and the second balloon group 22 occupy a small space, so that the size of the stent 1 can be reduced. In a preferred embodiment, the first balloon tube 212 passes through the second balloon 221 between adjacent first balloons 21. The first balloon tube 212 passes through the second balloon 221, so that the occupied space inside the stent 1 is reduced, and the filling space of the second balloon 221 can be reduced. The second balloon tube 222 passes through the first balloon 211 between adjacent second balloons 221. The passage of the second balloon tube 222 from within the first balloon 211 not only reduces the space occupied within the stent 1, but also allows the first balloon 211 to reduce the fill space. The arrangement layout of the first balloon group 21 and the second balloon group 22 reduces the use of the internal space of the bracket 1, thereby reducing the size of the bracket 1, facilitating the placement of the bracket 1 in the ear-nose cavity and reducing the pain of the patient.

In one example, the valve mechanism 3 includes a fixed valve 31. The fixed valve 31 is provided with a positioning hole 311 at the center. The fixed valve 31 is provided with two first injection holes 312. One of the two first injection holes 312 is connected to the first balloon tube 212. And the other to a second balloon tube 222.

As shown in fig. 7, the valve mechanism 3 is used to control the filling of the balloon set 2. The fixed valve 31 is connected with the balloon set 2. A positioning hole 311 is provided at the center of the stationary valve 31 for connecting the stationary valve 31. The two first injection holes 312 are connected to the first and second balloon tubes 212 and 222, respectively, and can control the filling of the first and second balloon groups 21 and 22, respectively.

Of course, the fixed valve in the disclosed embodiment is not limited to the above structure. The position of the first injection hole 312 is not limited to the above-described structure. For example, two first injection holes 312 are arranged in central symmetry with respect to the positioning hole 311. The fixed valve 31 may also be provided with a plurality of first injection holes 312 for connecting with the balloon set 2 to control the filling of the balloon set 2.

In one example, the valve mechanism 3 further includes a selector valve 32. The selection valve 32 forms a seal with the fixed valve 31. A positioning column 321 is arranged at the center of the selection valve 32. The positioning post 321 is rotatably connected with the positioning hole 311. The selector valve 32 is provided with two second injection holes 322 and one third injection hole 323. The third injection hole 323 is located between two of the second injection holes 322.

As shown in fig. 6 and 10, the two second injection holes 322 of the selector valve 32 correspond to the two first injection holes 312 of the fixed valve 31 in position and have the same diameter. The number of the third injection holes 323 is one. The position of the third injection hole 323 corresponds to the position of one of the first injection holes 312. The third injection hole 323 has a diameter that is the same size as the first injection hole 312. The positioning post 321 of the selection valve 32 matches with the positioning hole 311 of the fixed valve 31, so that the selection valve 32 and the fixed valve 31 are rotatably connected.

Of course, the selection valve 32 in the disclosed embodiment is not limited to the above-described structure. The positions of the second and third injection holes 322 and 323 are not limited to the above-described structure. For example, two second injection holes 322 are disposed on the selector valve 32 in a central symmetry manner with respect to the positioning column 321. The selector valve 32 may also be provided with a plurality of second injection holes 322 and a plurality of third injection holes 323 for connecting with the balloon set 2 to control the filling of the balloon set 2.

The connection mode of the fixed valve 31 and the selection valve 32 is not limited to the above structure, and the fixed valve 31 and the selection valve 32 may be rotatably connected.

In the first state, the two second injection holes 322 are respectively disposed opposite to the two first injection holes 312.

As shown in fig. 10, when the two second injection holes 322 correspond to the positions of the two first injection holes 312, respectively, the first and second groups of capsules 21 and 22 may be simultaneously filled with gas or liquid. Simultaneously, the opening 11 of the stent 1 and the stent 1 are expanded. The third injection hole 323 is in a closed state at this time.

In the second state, the third injection hole 323 is opposite to one of the first injection holes 312.

As shown in fig. 1, when the third injection hole 323 corresponds to the position of one of the first injection holes 312, one of the first or second balloon groups 21 or 22 may be filled with a gas or a liquid. The opening 11 in the stent 1 or the stent 1 is expanded. The two second injection holes 322 are closed.

In the third state, the two second injection holes 322 are respectively offset from the two first injection holes 312. The third injection holes 323 are offset from the two first injection holes 312.

When neither the second injection hole 322 nor the third injection hole 323 corresponds to the position of the first injection hole 312, the second injection hole 322, and the third injection hole 323 are in a sealed state. The first balloon set 21 and/or the second balloon set 22 are sealed and remain in a deflated or filled state.

In one example, the selector valve 32 includes a valve body 324. The valve body 324 includes a first wall 3241 and a second wall 3242. The first wall 3241 and the second wall 3242 define a communication cavity 3243. The positioning post 321 is disposed on the first wall 3241. Two second injection holes 322 and the third injection hole 323 are provided on the first wall 3241. The first wall 3241 is sealingly connected to the fixed valve 31. The second wall 3242 is provided with a fourth injection hole 3244.

As shown in fig. 9 and 10, first wall 3241 is the portion of valve body 324 that is connected to locating post 321. Second wall 3242 is the portion of valve body 324 distal from locating post 321. A communication cavity 3423 is formed between the first wall 3241 and the second wall 3242. A side of the communication chamber 3243 near the first wall 3241 communicates with the two second injection holes 322 and the third injection hole 323. The fourth injection hole 3244 in the first wall 3241 communicates with the communication chamber 3243.

The selection valve 32 and the fixed valve 31 are connected with the positioning hole 311 through the positioning column 321. The second or third injection hole 322 or 323 corresponds to the position of the first injection hole 312.

As shown in fig. 10, when the first and second balloon groups 21 and 22 are simultaneously filled, the valve body 324 is rotated to correspond the position of the second injection hole 322 to the first injection hole 312. A gas or liquid is injected through the fourth injection hole 3244. The gas or liquid flows toward the second injection holes 322 through the communication chamber 3243, respectively. Flows through the first injection hole 342 into the first and second balloon tubes 212 and 222, thereby filling the first and second balloons 211 and 221.

When only the first or second balloon group 21 or 22 needs to be filled, the valve body 324 is rotated to correspond the position of one of the first injection holes 312 of the third injection holes 323. A gas or liquid is injected through the fourth injection hole 3244. The two second injection holes 322 are in a sealed state. The gas or liquid flows toward the third injection hole 323 through the communication chamber 3243. Flows through the first injection hole 312 into the first balloon tube 212 or the second balloon tube 222, thereby filling the first balloon 211 or the second balloon 221.

In one example, the first wall 3241 forms a seal with the stationary valve 31 via an annular sealing ring 33.

As shown in fig. 9, the selector valve 32 and the fixed valve 21 are sealed by a packing 33. The sealing ring 33 is disposed between the first wall 3241 and the stationary valve 21. The material of the seal ring 33 may be rubber, silica gel, or other material having a certain flexible deformation property. Thus, during assembly, the gasket 33 can deform between the stationary valve 31 and the first wall 3241 to conform to the shape of the gap between the stationary valve 31 and the first wall 3241 to better seal the gap. Moreover, after the sealing ring 33 is deformed by pressure, the sealing ring 33 itself can accumulate elastic force for restoring the original shape, and the connection reliability of the fixed valve 31 and the first wall 3241 can be ensured.

In one example, the position of the fourth injection hole 3244 corresponds to the position of the positioning column 321.

As shown in fig. 9 and 10, the two second injection holes 322 are arranged in a central symmetry with respect to the positioning column 321. The third injection hole 323 is located between the two second injection holes 322. The fourth injection hole 3244 is provided at a position corresponding to the positioning column 321, and the distance between the fourth injection hole 3244 and the two second injection holes 322 and the third injection hole 323 may be made uniform. The gas and liquid injected through the fourth injection hole 3244 may uniformly flow to the second injection 322 positioned in two directions. The filling speed and the expansion state of the first balloon set 21 and the second balloon set 22 can be effectively ensured.

In one example, the stent 1 is in a mesh structure. The stent 1 is made of degradable materials.

As shown in fig. 11, the surface of the stent 1 is in a net structure, the first balloon 211 in a filling state extends out from the net opening 11, and the second balloon 221 in a filling state abuts against the intersection of the net structure in the stent 1.

Of course, the bracket 1 in the embodiment of the present disclosure is not limited to the above structure. The holder 1 may also be provided in other states with openings 11. Such as an opening 11 extending in the axial direction of the holder 1, etc.

In one example, the stent 1 comprises a plurality of half-stents 12 and a plurality of ribs 13. A plurality of said half-stents 12 and said plurality of ribs 13 enclose a hollow tube shape. Two adjacent half-brackets 12 are connected through the ribs 13. The ribs 13 extend in the axial direction of the holder 1. The degradation rate of the ribs 13 is greater than that of the semi-stent 12.

As shown in fig. 11, the degradation speed of the ribs 13 is greater than that of the half-stent 12, that is, after the stent 1 in the ear-nose cavity is placed for a certain time, the ribs 13 are degraded first. The ribs 13 degrade to split the hollow tubular stent 1 into a plurality of half-stents 12. The bracket 1 is split into a plurality of half brackets 12, so that the degradation speed of the bracket 1 in the ear-nose cavity channel can be accelerated. In the degradation process of the ribs 13 and the semi-bracket 12, substances which are beneficial to recovery of the focuses of the ear-nose cavity are released, and the healing of the focuses is accelerated.

As shown in fig. 12, according to the present disclosure, the first balloon group 21 and the second balloon group 21 are staggered in the stent 1, so that the occupied internal space of the stent 1 is effectively reduced, the volume of the stent 1 can be further compressed to a greater extent, the placement in the ear-nose cavity is facilitated, and the pain of the patient is reduced. The valve mechanism 3 is connected with the sacculus group 2, the filling of the sacculus group 2 can be selectively controlled, the bracket 1 can be used for expanding the focus of the ear-nose cavity according to the conditions of different patients, and the adaptability is high.

In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. A balloon stent assembly, comprising:

the support (1), the support (1) is in a hollow tubular shape, and a plurality of openings (11) are formed in the support (1);

the balloon group (2) is arranged in the bracket (1), the balloon group (2) comprises a first balloon group (21) and a second balloon group (22), the position of the first balloon group (21) corresponds to the opening (11), and the position of the second balloon group (22) corresponds to the inner wall of the bracket (1); and

the valve mechanism (3), the said valve mechanism (3) is connected with said sacculus group (2);

wherein the first balloon group (21) protrudes out of the opening (11) of the stent (1) in the filling state, and the second balloon group (22) abuts against the inner wall of the stent (1) in the filling state to support the stent (1).

2. A balloon stent assembly according to claim 1, wherein the first and second balloon groups (21, 22) are staggered within the stent (1).

3. A balloon stent assembly according to claim 1 wherein the first balloon set (21) comprises a plurality of first balloons (211) and first balloon tubes (212), adjacent first balloons (211) being connected by the first balloon tubes (212); the second balloon group (22) comprises a plurality of second balloons (221) and second balloon tubes (222), and the adjacent second balloons (221) are connected through the second balloon tubes (222);

the plurality of first balloons (211) is staggered from the plurality of second balloons (221).

4. A balloon stent assembly according to claim 1 wherein the first balloon tube (212) passes through adjacent the second balloon (221); the second balloon tube (222) passes through adjacent the first balloon (211).

5. A balloon support assembly according to claim 1, wherein the valve mechanism (3) comprises:

the fixed valve (31), the fixed valve (31) is provided with a positioning hole (311) at the center, the fixed valve (31) is provided with two first injection holes (312), one of the two first injection holes (312) is connected with the first balloon tube (212), and the other one is connected with the second balloon tube (222);

the selection valve (32) is sealed with the fixed valve (31), a positioning column (321) is arranged at the center of the selection valve (32), the positioning column (321) is rotatably connected with the positioning hole (311), two second injection holes (322) and a third injection hole (323) are arranged on the selection valve (32), and the third injection hole (323) is positioned between the two second injection holes (322);

in the first state, the two second injection holes (322) are respectively arranged opposite to the two first injection holes (312);

in a second state, the third injection hole (323) is opposite to one of the first injection holes (312);

in the third state, the two second injection holes (322) are provided so as to be offset from the two first injection holes (312), respectively, and the third injection hole (323) is provided so as to be offset from the two first injection holes (312).

6. A balloon support assembly according to claim 5, wherein the selector valve (32) comprises a valve body (324), the valve body (324) comprises a first wall (3241) and a second wall (3242), the first wall (3241) and the second wall (3242) enclose a communication cavity (3243), the positioning column (321) is arranged on the first wall (3241), two second injection holes (322) and the third injection hole (323) are arranged on the first wall (3241), the first wall (3241) is connected with the fixed valve (31) in a sealing manner, and a fourth injection hole (3244) is arranged on the second wall (3242).

7. A balloon support assembly according to claim 6, wherein the first wall (3241) forms a seal with the stationary valve (31) by means of an annular sealing ring (33).

8. A balloon holder assembly according to claim 7, wherein the position of the fourth injection hole (3244) corresponds to the position of the positioning post (321).

9. A balloon stent assembly according to claim 1, wherein the stent (1) is a mesh structure, the stent (1) being of a degradable material.

10. A balloon stent assembly according to claim 9, wherein the stent (1) comprises a plurality of half stents (12) and a plurality of ribs (13), the plurality of half stents (12) and the plurality of ribs (13) enclose a hollow tubular shape, two adjacent half stents (12) are connected by the ribs (13), the ribs (13) extend along the axial direction of the stent (1), and the degradation speed of the ribs (13) is greater than that of the half stents (12).

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