A balloon stent assembly

Abstract

The application discloses a balloon stent assembly, which comprises a stent, a balloon group and a valve mechanism. The stent is hollow tubular, and a plurality of openings are arranged on the stent. The balloon group is arranged in the stent, and the balloon group comprises a first balloon group and a second balloon group. The first balloon group is arranged in a position corresponding to the openings, and the second balloon group is arranged in a position corresponding to the inner wall of the stent. The valve mechanism is connected with the balloon group. In the filled state, the first balloon group protrudes from the openings of the stent, and in the filled state, the second balloon group abuts against the inner wall of the stent to support the stent.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to a balloon stent assembly. Background Technology

[0002] The human ear and nasal passages are relatively narrow. When the body is diseased, the tissues in the ear and nasal passages may extend into the passages, which can easily cause blockage.

[0003] In related technologies, during the treatment of the ear and nasal cavities in the human body, medical devices cannot effectively reach the lesion site, cannot effectively expand the ear and nasal cavities, and are inconvenient to remove, thus failing to effectively solve the problem of ear and nasal cavity blockage. Summary of the Invention

[0004] One object of this disclosure is to provide a new technical solution for a balloon stent assembly.

[0005] According to a first aspect of this disclosure, a balloon stent assembly is provided. The balloon stent assembly includes a stent, a balloon assembly, and a valve mechanism; the stent is a hollow tube with multiple openings; the balloon assembly is disposed within the stent, and the balloon assembly includes a first balloon assembly and a second balloon assembly, the first balloon assembly being positioned corresponding to the openings, and the second balloon assembly being positioned corresponding to the inner wall of the stent; the valve mechanism is connected to the balloon assembly; wherein, in an inflated state, the first balloon assembly protrudes beyond the openings of the stent, and the second balloon assembly abuts against the inner wall of the stent in an inflated state to support the stent.

[0006] Optionally, the first balloon group and the second balloon group are arranged alternately within the stent.

[0007] Optionally, the first balloon group includes a plurality of first balloons and a first balloon tube, with adjacent first balloons connected by the first balloon tube; the second balloon group includes a plurality of second balloons and a second balloon tube, with adjacent second balloons connected by the second balloon tube; the plurality of first balloons and the plurality of second balloons are arranged alternately.

[0008] Optionally, the first balloon tube passes through an adjacent second balloon; the second balloon tube passes through an adjacent first balloon.

[0009] Optionally, the valve mechanism includes a fixed valve and a selector valve; the fixed valve has a positioning hole at its center and two first injection holes, one of which is connected to a first balloon tube and the other to a second balloon tube; the selector valve forms a seal with the fixed valve, and has a positioning post at its center, which is rotatably connected to the positioning hole; the selector valve has two second injection holes and one third injection hole, the third injection hole being located between the two second injection holes; in a first state, the two second injection holes are respectively 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 staggered from the two first injection holes, and the third injection hole is staggered from the two first injection holes.

[0010] Optionally, the selection valve includes a valve body and a positioning pin. The valve body includes a first wall and a second wall, which form a communicating cavity. The positioning pin is disposed on the first wall. Two second injection holes and a third injection hole are provided on the first wall. The first wall is sealed to the fixed valve. A fourth injection hole is provided on the second wall.

[0011] Optionally, the first wall and the fixed valve are sealed by an annular sealing ring.

[0012] Optionally, the position of the fourth injection hole corresponds to the position of the positioning post.

[0013] Optionally, the support has a mesh structure and is made of a biodegradable material.

[0014] Optionally, the support includes multiple half-supports and multiple ribs, the multiple half-supports and the multiple ribs forming a hollow tube, adjacent two half-supports being connected by the ribs, the ribs extending along the axial direction of the support, and the degradation rate of the ribs being greater than that of the half-supports.

[0015] According to one embodiment of this disclosure, a first balloon assembly is positioned at the opening of the stent. The inflated first balloon assembly protrudes from the stent surface to initially dilate the ear and nasal canal, reducing the excessive impact on the lesion site caused by directly opening the stent and thus minimizing patient discomfort. A second balloon assembly is positioned inside the stent and abuts against the inner wall of the stent. The inflated second balloon assembly supports the stent and further dilates the ear and nasal canal. By alternately positioning the first and second balloons within the stent, the lesion site can be gradually dilated, thereby reducing patient discomfort. A valve mechanism adjusts the degree of expansion of the first and second balloon assemblies to suit patients with different ear and nasal canal diameters, effectively dilating the ear and nasal canals and reducing the risk of internal adhesions within the ear and nasal canals.

[0016] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0018] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present disclosure.

[0019] Figure 2 This is a schematic diagram of the simultaneous filling state of the first balloon group and the second balloon group according to an embodiment of this disclosure.

[0020] Figure 3 This is a schematic cross-sectional view of the balloon assembly after filling, according to an embodiment of this disclosure.

[0021] Figure 4 This is a schematic cross-sectional view of the balloon assembly during filling according to an embodiment of the present disclosure.

[0022] Figure 5 This is a schematic cross-sectional view of the balloon assembly before filling, according to an embodiment of this disclosure.

[0023] Figure 6 This is a schematic diagram of the selective valve on the side away from the fixed valve according to an embodiment of this disclosure.

[0024] Figure 7 This is a schematic diagram of a fixed valve according to an embodiment of this disclosure.

[0025] Figure 8 This is a schematic diagram of the selector valve near the fixed valve in an embodiment of this disclosure.

[0026] Figure 9 This is an exploded cross-sectional view of the selector valve and the fixed valve according to an embodiment of this disclosure.

[0027] Figure 10 This is a schematic diagram of the cross-sectional structure combination of the selector valve and the fixed valve according to an embodiment of this disclosure.

[0028] Figure 11 This is a schematic diagram of a bracket according to an embodiment of the present disclosure.

[0029] Figure 12 This is a schematic diagram illustrating the usage state of an embodiment of this disclosure.

[0030] In the diagram, 1-support; 11-opening; 12-half-support; 13-rib; 2-balloon assembly; 21-first balloon assembly; 211-first balloon; 212-first balloon tube; 22-second balloon assembly; 221-second balloon; 222-second balloon tube; 3-valve mechanism; 31-fixed valve; 311-positioning hole; 32-selection valve; 312-first injection hole; 321-positioning pin; 322-second injection hole; 323-third injection hole; 324-valve body; 3241-first wall; 3242-second wall; 3243-connecting cavity; 3244-fourth injection hole; 33-sealing ring. Detailed Implementation

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0032] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0033] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0034] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0036] This disclosure provides a balloon stent assembly, which includes a stent 1, a balloon assembly 2, and a valve mechanism 3. The stent 1 is a hollow tube with multiple openings 11. The balloon assembly 2 is disposed within the stent 1. The balloon assembly 2 includes a first balloon assembly 21 and a second balloon assembly 22. The first balloon assembly 21 is positioned corresponding to the openings 11. The second balloon assembly 22 is positioned corresponding to the inner wall of the stent 1. The valve mechanism 3 is connected to the balloon assembly 2. The first balloon assembly 21, when inflated, protrudes from the openings 11 of the stent 1. The second balloon assembly 22, when inflated, abuts against the inner wall of the stent 1 to support the stent 1.

[0037] like Figures 1 to 5 As shown, the stent 1 has a hollow tubular interior for housing the balloon assembly 2. The first balloon assembly 21 corresponds to the opening 11 on the stent 1. When the first balloon assembly 21 is filled with gas or liquid, it protrudes from the opening 11 of the stent 1, expanding the tissue at the lesion site through the opening 11 on the side wall of the stent 1. The balloon assembly 2 is made of flexible material, reducing damage to the skin tissue and minimizing patient discomfort. The second balloon assembly 22 abuts against the inner wall of the stent 1. When the second balloon assembly 22 is filled with gas or liquid, it supports the stent 1, further expanding the lesion site. Through the coordinated expansion of the first balloon assembly 21 and the second balloon assembly 22, effective support can be provided for the ear and nasal cavity, and patient discomfort can be significantly reduced.

[0038] Of course, the balloon assembly 2 in this embodiment is not limited to the structure described above. Multiple balloon assemblies 2 may also be provided. Multiple balloon assemblies 2 may contact the stent 1 at different positions.

[0039] In one example, the first balloon group 21 and the second balloon group 22 are arranged alternately within the stent 1.

[0040] like Figures 1 to 5 As shown, the first balloon group 21 and the second balloon group 22 are arranged alternately, which allows for uniform expansion of the stent 1 as a whole. This avoids situations where the stent 1 expands excessively in one area while other parts of the stent 1 remain uncontacted with the skin tissue. Furthermore, by arranging the first balloon group 21 and the second balloon group 22 alternately, the space occupied by the stent 1 can be reduced, allowing the stent 1 to be contracted as much as possible, making placement into the ear and nasal cavity easier and reducing patient discomfort.

[0041] In one example, the first balloon group 21 includes a plurality of first balloons 211 and a first balloon tube 212. Adjacent first balloons 211 are connected via the first balloon tube 212. The second balloon group 22 includes a plurality of second balloons 221 and a second balloon tube 222. Adjacent second balloons 221 are connected via the second balloon tube 222. The plurality of first balloons 211 and the plurality of second balloons 221 are arranged alternately.

[0042] like Figures 3 to 5 As shown, the first balloon 211 and the second balloon 221 have the same shape, both being elongated or elliptical structures. The top and bottom of the first balloon 211 face the opening 11 on the stent 1. Gas or liquid is injected into the first balloon 221 for filling. After filling, the top and bottom of the first balloon 211 extend out of the opening 11 of the stent 1 and contact the skin tissue, thereby initially expanding the tissue through the first balloon 211. The top and bottom of the second balloon 221 face the inner wall of the stent 1. Gas or liquid is injected into the second balloon 221 for filling. After filling, the top and bottom of the second balloon 221 abut against the inner wall of the stent 1, supporting and expanding the stent 1, thereby expanding the stent 1 through the second balloon 221, and further expanding the tissue.

[0043] 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.

[0044] like Figures 3 to 5 As shown, the first balloon 211 and the second balloon 221 are staggered inside the stent 1. The two ends of the first balloon tube 212 are connected to adjacent first balloons 211. The two ends of the second balloon tube 222 are connected to adjacent second balloons 221. The first balloon group 21 and the second balloon group 22 occupy little space, thus reducing the volume of the stent 1. 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 passing through the second balloon 221 not only reduces the space occupied inside the stent 1 but also reduces the filling space of the second balloon 221. The second balloon tube 222 passes through the first balloon 211 between adjacent second balloons 221. The second balloon tube 222 passing through the first balloon 211 not only reduces the space occupied inside the stent 1 but also reduces the filling space of the first balloon 211. The arrangement of the first balloon group 21 and the second balloon group 22 reduces the internal space used by the stent 1, thereby reducing the volume of the stent 1, making it easier to place the stent 1 in the ear and nose cavity, and reducing patient pain.

[0045] In one example, the valve mechanism 3 includes a fixed valve 31. The fixed valve 31 has a positioning hole 311 at its center. The fixed valve 31 has two first injection holes 312. One of the two first injection holes 312 is connected to the first balloon tube 212. The other is connected to the second balloon tube 222.

[0046] like Figure 7 As shown, the valve mechanism 3 is used to control the filling of the balloon assembly 2. A fixed valve 31 is connected to the balloon assembly 2. A positioning hole 311 is located at the center of the fixed valve 31 and is used to connect the fixed valve 31. Two first injection holes 312 are respectively connected to the first balloon tube 212 and the second balloon tube 222, and can respectively control the filling of the first balloon assembly 21 and the second balloon assembly 22.

[0047] Of course, the fixed valve in this embodiment is not limited to the structure described above. The position of the first injection hole 312 is also not limited to the structure described above. For example, the two first injection holes 312 are arranged symmetrically with respect to the positioning hole 311. Multiple first injection holes 312 may also be provided on the fixed valve 31 for connection with the balloon assembly 2 to control the filling of the balloon assembly 2.

[0048] In one example, the valve mechanism 3 further includes a selection valve 32. The selection valve 32 forms a seal with the fixed valve 31. A positioning post 321 is provided at the center of the selection valve 32. The positioning post 321 is rotatably connected to the positioning hole 311. The selection valve 32 is provided with two second injection holes 322 and one third injection hole 323. The third injection hole 323 is located between the two second injection holes 322.

[0049] like Figure 6 and Figure 10 As shown, the two second injection holes 322 on the selector valve 32 correspond in position to the two first injection holes 312 on the fixed valve 31, and have the same diameter. There is one third injection hole 323. The position of the third injection hole 323 corresponds to the position of one of the first injection holes 312. The diameter of the third injection hole 323 is the same as the diameter of the first injection hole 312. The positioning pin 321 of the selector valve 32 matches the positioning hole 311 of the fixed valve 31, thus allowing the selector valve 32 and the fixed valve 31 to be rotatably connected.

[0050] Of course, the selection valve 32 in this embodiment is not limited to the structure described above. The positions of the second injection port 322 and the third injection port 323 are also not limited to the structure described above. For example, the two second injection ports 322 are centrally symmetrically arranged on the selection valve 32 with respect to the positioning post 321. The selection valve 32 may also be provided with multiple second injection ports 322 and multiple third injection ports 323 for connection to the balloon assembly 2 to control the filling of the balloon assembly 2.

[0051] The connection method between the fixed valve 31 and the selector valve 32 is not limited to the above structure; it can be achieved by making the fixed valve 31 and the selector valve 32 rotatably connected.

[0052] In the first state, the two second injection holes 322 are respectively positioned opposite to the two first injection holes 312.

[0053] like Figure 10 As shown, when the two second injection holes 322 correspond to the positions of the two first injection holes 312, the first balloon assembly 21 and the second balloon assembly 22 can be simultaneously filled with gas or liquid. At the same time, the opening 11 on the stent 1 and the stent 1 are expanded. At this time, the third injection hole 323 is in a closed state.

[0054] In the second state, the third injection hole 323 is opposite to one of the first injection holes 312.

[0055] like Figure 1 As shown, when the third injection port 323 corresponds to one of the first injection ports 312, gas or liquid can be filled into one of the first balloon group 21 or the second balloon group 22. The opening 11 on the stent 1 or the stent 1 itself is then expanded. At this time, both second injection ports 322 are closed.

[0056] In the third state, the two second injection holes 322 are respectively offset from the two first injection holes 312. The third injection hole 323 is also offset from the two first injection holes 312.

[0057] When neither the second injection port 322 nor the third injection port 323 corresponds to the position of the first injection port 312, the first injection port 312, the second injection port 322, and the third injection port 323 are all in a sealed state. At this time, the first balloon assembly 21 and / or the second balloon assembly 22 are sealed, remaining in an empty or filled state.

[0058] In one example, the selection 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 form a communicating cavity 3243. The positioning post 321 is disposed on the first wall 3241. Two second injection holes 322 and a third injection hole 323 are provided on the first wall 3241. The first wall 3241 is sealingly connected to the fixed valve 31. A fourth injection hole 3244 is provided on the second wall 3242.

[0059] like Figure 9 and Figure 10As shown, the first wall 3241 is the valve body 324 portion connected to the positioning post 321. The second wall 3242 is the valve body 324 portion away from the positioning post 321. A communicating cavity 3423 is formed between the first wall 3241 and the second wall 3242. The side of the communicating cavity 3243 closest to the first wall 3241 communicates with two second injection holes 322 and a third injection hole 323. A fourth injection hole 3244 on the first wall 3241 communicates with the communicating cavity 3243.

[0060] Selector valve 32 and fixed valve 31 are connected to positioning hole 311 via positioning pin 321. The second injection hole 322 or the third injection hole 323 corresponds to the position of the first injection hole 312.

[0061] like Figure 10 As shown, when the first balloon assembly 21 and the second balloon assembly 22 are filled simultaneously, the valve body 324 is rotated to align the second injection port 322 with the first injection port 312. Gas or liquid is injected through the fourth injection port 3244. The gas or liquid flows through the connecting cavity 3243 to the second injection port 322 respectively. It then flows through the first injection port 342 into the first balloon tube 212 and the second balloon tube 222, thereby filling the first balloon 211 and the second balloon 221.

[0062] When only the first balloon assembly 21 or the second balloon assembly 22 needs to be filled, the valve body 324 is rotated to align the position of one of the first injection holes 312 in the third injection hole 323. Gas or liquid is then injected through the fourth injection hole 3244. At this time, the two second injection holes 322 are sealed. The gas or liquid flows through the connecting cavity 3243 to the third injection hole 323. It then 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.

[0063] In one example, the first wall 3241 and the fixed valve 31 are sealed by an annular sealing ring 33.

[0064] like Figure 9 As shown, the selector valve 32 and the fixed valve 21 are sealed by a sealing ring 33. The sealing ring 33 is disposed between the first wall 3241 and the fixed valve 21. The sealing ring 33 can be made of materials with certain flexible deformation properties, such as rubber or silicone. In this way, during assembly, the sealing ring 33 can deform between the fixed valve 31 and the first wall 3241 to adapt to the shape of the gap between the fixed valve 31 and the first wall 3241, thus effectively sealing the gap. Moreover, after the sealing ring 33 is deformed under pressure, it can also accumulate elastic force to return to its original shape, ensuring the reliability of the connection between the fixed valve 31 and the first wall 3241.

[0065] In one example, the position of the fourth injection hole 3244 corresponds to the position of the positioning post 321.

[0066] like Figure 9 and Figure 10 As shown, the two second injection holes 322 are centrally symmetrically arranged relative to the positioning post 321. The third injection hole 323 is located between the two second injection holes 322. Positioning the fourth injection hole 3244 at a location corresponding to the positioning post 321 ensures that the distance between the fourth injection hole 3244 and the two second injection holes 322 and the third injection hole 323 is consistent. Gas and liquid injected through the fourth injection hole 3244 can flow evenly to the second injection holes 322 located in both directions. This effectively ensures the filling speed and expansion state of the first balloon assembly 21 and the second balloon assembly 22.

[0067] In one example, the support 1 has a mesh structure. The support 1 is made of a biodegradable material.

[0068] like Figure 11 As shown, the surface of the stent 1 has a mesh structure. The first balloon 211 in the filled state extends out of the mesh opening 11, and the second balloon 221 in the filled state abuts against the intersection of the mesh structure inside the stent 1.

[0069] Of course, the support 1 in this embodiment is not limited to the structure described above. The support 1 may also be configured in other ways with an opening 11, such as an opening 11 extending along the axial direction of the support 1.

[0070] In one example, the support 1 includes a plurality of half-supports 12 and a plurality of ribs 13. The plurality of half-supports 12 and the plurality of ribs 13 form a hollow tube. Adjacent half-supports 12 are connected by the ribs 13. The ribs 13 extend along the axial direction of the support 1. The degradation rate of the ribs 13 is greater than that of the half-supports 12.

[0071] like Figure 11 As shown, the degradation rate of the ligament 13 is greater than that of the semi-scaffold 12. That is, after the stent 1 is placed in the ear and nasal canal for a certain period, the ligament 13 degrades first. The degradation of the ligament 13 causes the hollow tubular stent 1 to split into multiple semi-scaffolds 12. This splitting of the stent 1 into multiple semi-scaffolds 12 accelerates the degradation rate of the stent 1 within the ear and nasal canal. During the degradation process of the ligament 13 and the semi-scaffolds 12, substances that aid in the recovery of lesions in the ear and nasal canal are released, accelerating the healing of the lesions.

[0072] like Figure 12As shown, this disclosure effectively reduces the space occupied by the first balloon group 21 and the second balloon group 21 within the stent 1 by staggering them, thereby maximizing the compression of the stent 1's volume, facilitating placement into the ear and nasal cavity, and reducing patient discomfort. The valve mechanism 3, connected to the balloon group 2, allows for selective control of the balloon group 2's filling, making it easier to use the stent 1 to expand the lesion in the ear and nasal cavity according to different patients' conditions, resulting in high adaptability.

[0073] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0074] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can 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

1. A balloon stent assembly, characterized in that, include: The support (1) is a hollow tube, the support (1) has a mesh structure, and the support (1) is made of a biodegradable material; the support (1) has multiple openings (11). A balloon assembly (2) is disposed within the stent (1). The balloon assembly (2) includes 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 stent (1). The first balloon group (21) includes multiple first balloons (211) and a first balloon tube (212), and adjacent first balloons (211) are connected through the first balloon tube (212). The second balloon group (22) includes multiple second balloons (221) and a second balloon tube (222), and adjacent second balloons (221) are connected through the second balloon tube (222). Multiple first balloons (211) and multiple second balloons (221) are arranged alternately; The first balloon tube (212) passes through the adjacent second balloon (221); the second balloon tube (222) passes through the adjacent first balloon (211); and Valve mechanism (3), which is connected to the balloon assembly (2); The first balloon assembly (21) protrudes from the opening (11) of the stent (1) when inflated, and is used to initially expand the lesion site of the ear and nose cavity; the second balloon assembly (22) abuts against the inner wall of the stent (1) when inflated, and supports and expands the stent (1), thereby further expanding the lesion site of the ear and nose cavity.

2. The balloon stent assembly according to claim 1, characterized in that, The valve mechanism (3) includes: A fixed valve (31) is provided with a positioning hole (311) at the center of the fixed valve (31). 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 is connected to the second balloon tube (222). Select valve (32) forms a seal with the fixed valve (31). The center of the select valve (32) is provided with a positioning post (321). The positioning post (321) is rotatably connected to the positioning hole (311). The select valve (32) is provided with two second injection holes (322) and a third injection hole (323). The third injection hole (323) is located 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 the 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 respectively staggered from the two first injection holes (312), and the third injection hole (323) is staggered from the two first injection holes (312).

3. A balloon stent assembly according to claim 2, characterized in that, The selector valve (32) includes a valve body (324), which includes a first wall (3241) and a second wall (3242). The first wall (3241) and the second wall (3242) form a communicating cavity (3243). The positioning post (321) is disposed on the first wall (3241). Two second injection holes (322) and a third injection hole (323) are provided on the first wall (3241). The first wall (3241) is sealed to the fixed valve (31). A fourth injection hole (3244) is provided on the second wall (3242).

4. A balloon stent assembly according to claim 3, characterized in that, The first wall (3241) and the fixed valve (31) are sealed by an annular sealing ring (33).

5. A balloon stent assembly according to claim 4, characterized in that, The position of the fourth injection hole (3244) corresponds to the position of the positioning post (321).

6. A balloon stent assembly according to claim 1, characterized in that, The support (1) includes multiple half-support bodies (12) and multiple ribs (13). The multiple half-support bodies (12) and the multiple ribs (13) form a hollow tube. Two adjacent half-support bodies (12) are connected by the ribs (13). The ribs (13) extend along the axial direction of the support (1). The degradation rate of the ribs (13) is greater than that of the half-support bodies (12).

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