CN217067377U

CN217067377U - Balloon system

Info

Publication number: CN217067377U
Application number: CN202123389729.7U
Authority: CN
Inventors: 范碧波; 王佳豪; 刘群超; 史光明; 王丽文; 徐晓红; 袁振宇
Original assignee: Shanghai Lanmai Medical Technology Co ltd
Current assignee: Shanghai Lanmai Medical Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-07-29
Anticipated expiration: 2031-12-29
Also published as: AR127809A1; WO2023124491A1

Abstract

The utility model provides a balloon system, it includes: a balloon, a catheter assembly and a sizing structure; the balloon is sleeved outside the catheter component and is connected with the catheter component; the balloon has an expanded state and a folded state in a radial direction; the shaping structure is movably sleeved outside the catheter assembly along the axial direction of the catheter assembly and is provided with an initial position and a storage position in the axial direction; when the shaping structure is positioned at the initial position, the shaping structure is sleeved outside the catheter assembly and positioned at one side of the proximal end of the balloon; when the shaping structure is located at the accommodating position, the shaping structure is sleeved on the outer surface of the balloon so as to limit the balloon to the folded state. So the configuration, through the setting of design structure, can be with the sacculus of using the back release stereotype fast, can realize retrieving again and releasing of sacculus for this sacculus can be used many times in same operation.

Description

Balloon system

Technical Field

The utility model relates to the technical field of medical equipment, in particular to sacculus system.

Background

The medical balloon has wide application in clinic, on one hand, the drug coating can be coated on the surface of the balloon, and the targeted release of the drug coating can be realized after intervention, for example, the drug balloon; on the other hand, the balloon can be inserted into the body of the patient to realize blood occlusion after the body of the patient is full, such as the occlusion balloon.

Medical balloons may also be used to expand a diseased lumen in a blood vessel or for secondary expansion of a device (e.g., for expansion of a stent) at a target location within a patient. In both cases, there are higher requirements on the internal pressure of the medical balloon. Currently, to meet the pressure and non-compliance requirements during the expansion process, high pressure balloons may be used, as well as some medical balloons with reinforcing structures. Among the reinforcing structures of medical balloons, a fiber woven reinforcing structure is a common method.

However, the existing medical balloon can be inflated/retracted only once in the same operation, and cannot be used for multiple times, on one hand, a plurality of medical balloons need to be replaced in the operation, so that the treatment cost is improved, on the other hand, the success rate and efficiency of the operation are indirectly reduced, and the operation time is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sacculus system to solve the unable repetitious usage's of current medical sacculus problem.

In order to solve the above technical problem, the utility model provides a balloon system, it includes: a balloon, a catheter assembly and a sizing structure;

the balloon is sleeved outside the catheter component and is connected with the catheter component; the balloon has an expanded state and a folded state in a radial direction;

the shaping structure is movably sleeved outside the catheter assembly along the axial direction of the catheter assembly and is provided with an initial position and a storage position in the axial direction; when the shaping structure is positioned at the initial position, the shaping structure is sleeved outside the catheter assembly and positioned at one side of the proximal end of the balloon; when the shaping structure is located at the accommodating position, the shaping structure is sleeved on the outer surface of the balloon so as to limit the balloon to the folded state.

Optionally, the shaped structure has a lumen running through it in the axial direction of the catheter assembly, the lumen fitting the outer circumferential profile of the balloon in the folded state.

Optionally, the shaped structure has a flared section that gradually flares towards the distal end.

Optionally, the inner surface of the shaping structure has a wave-shaped or thread-shaped texture.

Optionally, the number of the lines in the axial direction is 3-30 at the same circumferential position of the inner cavity.

Optionally, the axial length of the shaping structure is 0.1-2 times of the axial length of the balloon; and/or the radial dimension of the inner cavity is 1-3 times of the radial outer dimension of the balloon in the folded state.

Optionally, the outer surface of the shaped structure has anti-slip lines.

Optionally, the catheter assembly includes an outer tube, an inner tube, and a stop, the proximal end of the inner tube is inserted into the outer tube, and the distal end of the inner tube extends out from the distal end of the outer tube; the near end of the balloon is connected with the outer tube, and the far end of the balloon is connected with the inner tube penetrating out of the outer tube;

the limiting table is fixedly arranged on the inner tube and located on one side of the far end of the outer tube, and the limiting table is used for abutting against the far end of the outer tube.

Optionally, the limiting table is in a conical shape gradually shrinking from the proximal end to the distal end; the conical bottom surface of the limiting table is used for abutting against the far end of the outer pipe.

Optionally, the outer tube has a communication port located within the balloon; when the far end of the outer pipe is abutted against the limiting table, the interior of the outer pipe is communicated with the exterior of the outer pipe through the communicating port.

Optionally, the distal end of the outer tube is recessed towards the proximal end along the axial direction to form the communication port.

Optionally, the number of the communication ports is 1-5, and/or the length of the communication ports along the axial direction of the duct assembly is 1-5 mm.

Optionally, the balloon system further comprises a connector; the connecting piece is provided with an accommodating cavity which is opened towards the far end, and the near end of the catheter assembly is inserted into the accommodating cavity; the radial size of the accommodating cavity is gradually increased from the proximal end to the distal end; or the accommodating cavity comprises more than two sections which are sequentially arranged along the axial direction of the catheter component, and the radial sizes of the more than two sections are sequentially increased from the proximal end to the distal end.

Optionally, the outer surface of the balloon has a hydrophobic coating.

To sum up, the utility model provides a sacculus system includes: a balloon, a catheter assembly and a sizing structure; the balloon is sleeved outside the catheter component and is connected with the catheter component; the balloon has an expanded state and a folded state in a radial direction; the shaping structure is movably sleeved outside the catheter assembly along the axial direction of the catheter assembly and is provided with an initial position and a storage position in the axial direction; when the shaping structure is positioned at the initial position, the shaping structure is sleeved outside the catheter assembly and positioned at one side of the proximal end of the balloon; when the shaping structure is located at the accommodating position, the shaping structure is sleeved on the outer surface of the balloon so as to limit the balloon to the folded state.

So dispose, through the setting of design structure, can finalize the design fast with the sacculus of using the back release, can realize retrieving once more and release of sacculus for this sacculus can be used many times in same platform operation, has practiced thrift the treatment expense on the one hand, has avoided the waste, and on the other hand has also improved the success rate and the efficiency of operation, has reduced the operation time.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

fig. 1 is a schematic view of a balloon system according to an embodiment of the present invention;

fig. 2a is a schematic cross-sectional view of a balloon in a folded state according to an embodiment of the invention;

fig. 2b is a schematic cross-sectional view of a balloon in an expanded state according to an embodiment of the invention;

fig. 3 is a schematic view of a preferred example of a styling form of an embodiment of the present invention;

fig. 4 is a schematic view of another preferred example of a styling form of an embodiment of the present invention;

fig. 5 is an axial sectional schematic view of a preferred example of the styling form of the embodiment of the present invention;

fig. 6 is a schematic axial cross-sectional view of another preferred example of a shaped structure of an embodiment of the present invention;

fig. 7 is a schematic axial cross-sectional view of a balloon and catheter assembly in accordance with an embodiment of the present invention;

fig. 8 is a schematic axial cross-sectional view of a connector according to an embodiment of the present invention.

In the drawings:

10-a balloon; 11-folding wings; 12-a bulk layer; 13-a reinforcement layer;

20-a catheter assembly; 21-an outer tube; 22-an inner tube; 23-a limiting table; 24-a communication port;

30-forming structure; 31-an inner cavity; 32-texture; 33-a flared section; 34-anti-slip texture;

40-a connector; 41-an accommodating cavity; 42-a segment; 43-main trunk cavity; 44-branch lumen.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a", "an" and "the" are generally employed in a sense including "at least one", the terms "at least two" and "two or more" are generally employed in a sense including "two or more", and moreover, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or imply that there is a number of technical features being indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or at least two of that feature, "one end" and "the other end" and "proximal end" and "distal end" generally refer to the corresponding two parts, including not only the endpoints. The terms "proximal" and "distal" are defined herein with respect to a balloon system having one end for insertion into a human body and a steering end extending out of the body. The term "proximal" refers to a position of the element closer to the steering end of the balloon system outside the extension, and the term "distal" refers to a position of the element closer to the end of the balloon system that is inserted into the human body and thus further away from the steering end of the balloon system. Alternatively, in a manual or hand-operated application scenario, the terms "proximal" and "distal" may also be defined herein with respect to an operator, such as a surgeon or clinician. The term "proximal" refers to a location of an element that is closer to the operator, and the term "distal" refers to a location of an element that is closer to the balloon system and thus further from the operator. Furthermore, as used in the present application, the terms "mounted," "connected," and "disposed" on another element should be construed broadly, and generally only mean that there is a connection, coupling, fit, or drive relationship between the two elements, and that the connection, coupling, fit, or drive between the two elements can be direct or indirect through intervening elements, and should not be construed as indicating or implying any spatial relationship between the two elements, i.e., an element can be located in any orientation within, outside, above, below, or to one side of another element unless the content clearly dictates otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. Moreover, directional terminology, such as above, below, up, down, upward, downward, left, right, etc., is used with respect to the exemplary embodiments as they are shown in the figures, with the upward or upward direction being toward the top of the corresponding figure and the downward or downward direction being toward the bottom of the corresponding figure.

The following description refers to the accompanying drawings.

Fig. 1 shows a balloon system comprising: balloon 10, catheter assembly 20, and sizing structure 30; the balloon 10 is sleeved outside the catheter assembly 20 and connected with the catheter assembly 20; the balloon 10 has an expanded state and a folded state in the radial direction and can be switched between the expanded state and the contracted state in the radial direction of the balloon; the shaping structure 30 is movably sleeved outside the catheter assembly 20 along the axial direction (horizontal direction in fig. 1) of the catheter assembly 20, and the shaping structure 30 has an initial position and a storage position in the axial direction and can move between the initial position and the storage position; the shaping structure 30 is sleeved outside the catheter assembly 20 and located on the proximal end side of the balloon 10 (left side of the proximal end 10a of the balloon 10 in fig. 1) when located at the initial position; when the shaping structure 30 is located at the receiving position, the shaping structure is sleeved outside the balloon 10 to limit the balloon 10 to the folded state.

The balloon 10 provided in this embodiment is primarily a non-compliant balloon, i.e., the circumferential length of the balloon wall does not change significantly as the internal filling pressure changes, and the radial expansion and contraction thereof is primarily dependent upon the folding and unfolding of the balloon wall. The expanded and collapsed states of the balloon 10 will now be described with reference to figures 2a and 2 b. The balloon 10 is radially movable between a collapsed position (as shown in fig. 2 a) and an expanded position (as shown in fig. 2 b) depending on the internal inflation pressure and the constraints. The balloon 10 is initially unfilled, and when the balloon 10 is loaded into the sheath, the balloon 10 is shaped to have a small radial outer dimension, a plurality of folded wings 11, and a compact folded state. The balloon 10 in its folded state has a small radial outer dimension for convenient interventional delivery to a predetermined location in the body. After the balloon 10 is conveyed to the preset position, the sheath tube is removed, the balloon 10 is inflated, and after a certain inflation pressure is reached, the balloon wall of the balloon 10 is unfolded and radially expanded until the balloon 10 is converted to the expanded state, and the outer peripheral profile of the cross section of the balloon is approximately circular. After the balloon 10 in the expanded state is released from the human body, the balloon 10 will return to the fluffy half-folded state and be in the folded state. The present embodiment utilizes the shaping structure 30 to perform secondary shaping, so that the balloon 10 can be restricted to be converted to the folded state again, and the balloon 10 can be reused.

Here, the radially outer dimension of the balloon 10 refers to an outer width of the balloon 10 in the radial direction thereof, and if the outer peripheral contour of the balloon 10 is a circle (e.g., when the balloon 10 is in an expanded state), the radially outer dimension is a diameter of the circle. If the outer peripheral contour of the balloon 10 is not a complete circle (e.g., the folded balloon 10 has a plurality of folding wings 11 on its outer periphery), the radial outer dimension is the diameter of the outer envelope circle of the outer peripheral contour of the balloon 10. Of course, in some cases, the balloon system of the present embodiment is also suitable for the balloon 10 with certain compliance, and the present embodiment is not limited thereto.

Continuing to refer to fig. 1, the holding structure 30 is shown in its initial position. The sizing structure 30 is then positioned over the catheter assembly 20 and on the proximal side of the balloon 10, i.e., on the left side of the balloon 10 in fig. 1. It should be noted that the distance between the shaping structure 30 and the proximal end of the balloon 10 when the shaping structure is in the initial position is not particularly limited. In use, after completing one operation in vivo, the balloon 10 is depressurized, and then the balloon 10 is withdrawn from the body, at this time, the balloon 10 returns to a fluffy half-folded state and is in a folded state, an operator can hold the shaping structure 30 to drive the shaping structure 30 to move from the initial position to the storage position along the axial direction of the catheter assembly 20, and the shaping structure 30 is gradually sleeved outside the balloon 10 from the proximal end to the distal end of the balloon 10, so that the balloon 10 is limited to the folded state. So dispose, through the setting of design structure 30, can finalize the design fast with the sacculus 10 of using the back release, can realize retrieving once more and release of sacculus 10 for this sacculus 10 can be used many times in same operation, has practiced thrift treatment cost on the one hand, has avoided the waste, and on the other hand has also improved the success rate and the efficiency of operation, has reduced the operation time.

Referring to fig. 3 to 6, optionally, the shaping structure 30 has a lumen 31 extending through the catheter assembly 20 in the axial direction, and the lumen 31 is adapted to the outer peripheral contour of the balloon 10 in the folded state. In some embodiments, the inner surface of the shaped structure 30 may be smooth, and the cross-section of the lumen 31 in the radial direction may be circular (or regular polygon). The diameter of the circle may be similar to the outer contour of the balloon 10 or slightly larger than the outer contour of the balloon 10, so that the balloon 10 can be restricted to the folded state.

In some embodiments, the diameter of the inner cavity 31 is uniform along the axial direction, and the entire inner cavity 31 is substantially cylindrical. Of course, the diameter of the inner cavity 31 along the axial direction is not limited to be uniform, and in other embodiments, the inner cavity 31 may be drum-shaped or tapered along the axial direction, and the configuration may be performed by those skilled in the art according to the actual application.

In other embodiments, the inner surface of the shaped structure 30 may also have axially extending ridges 32 to help smooth the folding wings 11 of the balloon 10. Preferably, ridges 32 may be undulating (as shown in FIG. 5) or threaded (as shown in FIG. 6). Preferably, lines 32 are recessed and arranged on the inner surface of the shaping structure 30, and the arrangement of the lines 32 increases the acting force acting on the surface of the balloon 10 when the shaping structure 30 moves from the initial position to the storage position, so that the used balloon 10 can be shaped for the second time quickly.

The vein 32 may be a whole piece or a plurality of pieces spirally coiled and extended shapes, or a plurality of pieces circumferentially closed and looped shapes, and one skilled in the art can select a suitable vein 32 according to the actual situation. Preferably, the number of the lines 32 along the axial direction is 3-30 at the same circumferential position of the inner cavity 31. It should be noted that the number of the ridges 32 at the same circumferential position of the inner cavity 31 along the axial direction refers to the number of the ridges that are cut at any one circumferential position along one circle of the inner cavity 31 and are axially extended and cut. Taking the example shown in fig. 6 as an example, the ridges 32 are in the shape of a whole spiral extending in a spiral shape, and the number of the ridges 32 cut in the axial direction is 11 at the same circumferential position of the inner cavity 31, for example, at the upper end of the inner cavity 31 in fig. 6.

In some embodiments, the axial length of the sizing structure 30 is 0.1-2 times the axial length of the balloon 10; the sizing structure 30 may pass through the balloon 10 during movement from the initial position to the storage position, or may partially or entirely cover the balloon 10.

In other embodiments, the radial dimension of the inner lumen 31 is 1-3 times the radial outer dimension of the balloon 10 in the folded state. The definition of the radial dimension of the inner lumen 31 can be understood with reference to the definition of the radial outer dimension of the balloon 10 described above, and in particular, the radial dimension of the inner lumen 31 refers to the width of the inner lumen 31 in the radial direction thereof, and if the cross-sectional shape of the inner lumen 31 is a circle, the radial dimension is the diameter of the circle. If the cross-sectional shape of the lumen 31 is not perfectly circular due to the presence of the ridges 32, the radial dimension is the diameter of the circle inscribed in the lumen 31. The radial dimension of the inner cavity 31 is 1-3 times of the radial outer dimension of the folded balloon 10, and the shaping structure 30 can be sleeved outside the balloon 10 from the near end of the balloon 10 quickly.

Further, the shaped structure 30 has a flared section 33 that gradually expands toward the distal end. The flared section 33 is provided to facilitate guided reception of the fluffy folded wings 11 into the inner cavity 31. Further, the outer surface of the shaped structure 30 has anti-slip lines 34 for the operator to hold.

Referring to fig. 7, in an exemplary embodiment, the catheter assembly 20 includes an outer tube 21 and an inner tube 22, a proximal end (left side in fig. 7) of the inner tube 22 is disposed through the outer tube 21, and a distal end (right side in fig. 7) of the inner tube 22 extends from a distal end of the outer tube 21; the proximal end of the balloon 10 is connected to the outer tube 21, and the distal end of the balloon 10 is connected to the inner tube 22 that passes out of the outer tube 21. With such a configuration, a closed space is formed inside the balloon 10, the gap between the outer tube 21 and the inner tube 22 is communicated with the closed space inside the balloon 10, and the inside of the balloon 10 can be inflated and depressurized through the gap between the outer tube 21 and the inner tube 22 in use. And the middle of the inner tube 21 can be used for the guide wire to pass through. Since, in use, for propelling the balloon 10 towards the distal end, an axial force is usually applied to the outer tube 21 or the manipulating end connected to the outer tube 21 externally, in order to improve the propelling performance of the balloon 10, the catheter assembly 20 further comprises a stop 23, the stop 23 is fixedly arranged on the inner tube 22 and is located at the distal end side of the outer tube 21, and the stop 23 is used for abutting against the distal end of the outer tube 21. When the balloon 10 is used, when the outer tube 21 is applied with force to the distal end, the outer tube 21 displaces towards the distal end relative to the inner tube 22 until the outer tube abuts against the limiting table 23 and is limited by the limiting table 23, and when the outer tube 21 is applied with force to the distal end, the thrust drives the balloon 10 to advance towards the distal end through a force transmission path from the end part of the outer tube 21 to the limiting table 23 to the inner tube 22 to the distal end of the balloon 10. Preferably, the limiting table 23 is tapered from the proximal end to the distal end; the conical bottom surface of the stop 23 is adapted to abut the distal end of the outer tube 21. The limiting table 23 is conical, so that the pushing resistance of the balloon 10 is further reduced.

Preferably, the outer tube 21 has a communication port 24, the communication port 24 being located within the balloon 10; when the distal end of the outer tube 21 abuts against the stopper table 23, the inside of the outer tube 21 communicates with the outside of the outer tube 21 through the communication port 24. That is, the communication port 24 is opened at the distal end portion of the outer tube 21. In an alternative example, the distal end of the outer tube 21 is axially recessed toward the proximal end to form the communication opening 24, i.e., the distal end surface of the outer tube 21 is not flush but is axially wavy. In some embodiments, the number of the communication ports 24 is 1 to 5, that is, the distal end of the outer tube 21 has a wave shape with 1 to 5 depressions in the circumferential direction. Optionally, the length of the communication port 24 along the axial direction of the catheter assembly 20 is between 1 and 5mm, that is, the distance from the deepest part of the communication port 24 along the axial direction to the far end of the outer tube 21 is between 1 and 5 mm. The communication port 24 ensures that the gap between the outer tube 21 and the inner tube 22 can be reliably communicated with the closed space inside the balloon 10 no matter whether the distal end of the outer tube 21 abuts against the limit table 23 or not, the distal end of the outer tube 21 does not abut against the limit table 23 to be blocked by the limit table 23, and the withdrawing time of the balloon 10 is effectively shortened. In other embodiments, the communication port 24 is not limited to be opened at the distal end of the outer tube 21, but may be opened on the outer tube 21 in a radial direction, and the embodiment is not limited thereto.

Referring to fig. 8, optionally, the balloon system further includes a connector 40; the connecting member 40 has a receiving cavity 41 opened toward the distal end, and the proximal end of the catheter assembly 20 is inserted into the receiving cavity 41; the radial dimension of the accommodating cavity 41 gradually increases from the proximal end to the distal end; or the accommodating cavity 41 comprises more than two sections which are sequentially arranged along the axial direction of the catheter assembly 20, and the radial sizes of the more than two sections are sequentially increased from the proximal end to the distal end. The radial dimensions of the receiving chamber 41 and of the segments can be understood here with reference to the above definitions relating to the radial dimensions of the inner chamber 31. Progressively larger receiving cavities 41 or sections of different radial dimensions may be compatible with catheter assemblies 20 of different gauge sizes. For example, in the example shown in fig. 8, the receiving cavity 41 includes 4 segments, which are

segments

421, 422, 423, 424 from the proximal end to the distal end. The segments may be cylindrical (e.g.,

segments

421, 422, 424) or may be tapered (e.g., segment 3). The adjacent sections can be in step connection or slope transition connection. The receiving chamber 41, the section 421 and the section 422 in this exemplary embodiment are mainly used for inserting the inner tube 22, so that they can fit at least two sizes of inner tubes 22. While the

sections

423 and 424 are mainly intended for the insertion of an outer tube 21, which can fit at least two sizes of outer tube 21. During assembly, the inner tube 22 and the outer tube 21 may be fixed by dispensing after being inserted into the corresponding sections. The accommodating cavity 41 of the connecting piece 40 comprises a plurality of sections, can be compatible with various inner tubes 22 and outer tubes 21, does not need to be opened specially for adapting to a certain specification of the catheter assembly 20, and reduces the production cost.

In an alternative example, the cavity inside the connecting member 40 may be Y-shaped, and further has a trunk lumen 43 coaxially communicating with the receiving lumen 41 and opening toward the proximal end, and a branch lumen 44 intersecting and communicating with the receiving lumen 41 at an angle. The trunk lumen 43 communicates with the inner tube 22 for the passage of a guidewire therethrough, and the branch lumen 44 communicates with the outer tube 21 for the infusion or aspiration of an inflation fluid. Other structures and principles of the connecting member 40 will be understood by those skilled in the art from the prior art, and the embodiment will not be described herein.

Optionally, the outer surface of the balloon 10 has a hydrophobic coating. Referring to fig. 2, in order to meet the requirements of pressure resistance and non-compliance during the expansion process, the balloon 10 provided in this embodiment may include a body layer 12 and a reinforcing layer 13 disposed outside the body layer 12, where the reinforcing layer 13 may be a fiber woven fabric, and the fiber woven fabric is easy to infiltrate blood during the treatment process of the balloon 10 intervening in the human body, on one hand, the strength of the reinforcing layer 13 is reduced, and on the other hand, the difficulty of withdrawing the balloon 10 is also increased. Thus, this embodiment applies a hydrophobic coating, such as PTFE or dodecamethylsiloxane, on top of the reinforcing layer 13. Due to the arrangement of the hydrophobic coating, on one hand, the reinforcing layer 13 cannot be soaked, the strength of the reinforcing layer 13 is ensured, and on the other hand, the withdrawing resistance of the balloon 10 is also reduced. Further, the provision of a hydrophobic coating also enables the balloon 10 to be more easily received within the lumen 31 of the sizing structure 30.

To sum up, the utility model provides a sacculus system includes: a balloon, a catheter assembly and a sizing structure; the balloon is sleeved outside the catheter component and is connected with the catheter component; the balloon has an expanded state and a folded state in a radial direction; the sizing structure is movably sleeved outside the catheter assembly along the axial direction of the catheter assembly, and the sizing structure is provided with an initial position and a storage position in the axial direction; when the shaping structure is positioned at the initial position, the shaping structure is sleeved outside the catheter assembly and positioned at one side of the proximal end of the balloon; when the shaping structure is located at the accommodating position, the shaping structure is sleeved on the outer surface of the balloon so as to limit the balloon to the folded state. So dispose, through the setting of design structure, can finalize the design fast with the sacculus of using the back release, can realize retrieving once more and release of sacculus for this sacculus can be used many times in same platform operation, has practiced thrift the treatment expense on the one hand, has avoided the waste, and on the other hand has also improved the success rate and the efficiency of operation, has reduced the operation time.

It should be noted that, several of the above embodiments may be combined with each other. The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. A balloon system, comprising: a balloon, a catheter assembly and a sizing structure;

2. The balloon system of claim 1, wherein the shaped structure has a lumen therethrough in an axial direction of the catheter assembly, the lumen conforming to a peripheral profile of the balloon in the folded state.

3. The balloon system of claim 2, wherein the sizing structure has a flared section that gradually expands toward the distal end.

4. The balloon system of claim 2, wherein the inner surface of the shaped structure has a wave or thread-like texture.

5. The balloon system of claim 4, wherein the ridges are axially 3-30 in number at the same circumferential location of the lumen.

6. The balloon system of claim 2, wherein the axial length of the shaped structure is 0.1-2 times the axial length of the balloon; and/or the radial dimension of the inner cavity is 1-3 times of the radial outer dimension of the balloon in the folded state.

7. The balloon system of claim 1, wherein an outer surface of the shaped structure has a non-slip texture.

8. The balloon system of claim 1, wherein the catheter assembly comprises an outer tube, an inner tube, and a stop, wherein a proximal end of the inner tube is disposed within the outer tube, and wherein a distal end of the inner tube extends from a distal end of the outer tube; the near end of the balloon is connected with the outer tube, and the far end of the balloon is connected with the inner tube penetrating out of the outer tube;

9. The balloon system of claim 8, wherein the stop is tapered to taper from a proximal end to a distal end; the conical bottom surface of the limiting table is used for abutting against the far end of the outer pipe.

10. The balloon system of claim 8, wherein the outer tube has a communication port located within the balloon; when the far end of the outer pipe is abutted against the limiting table, the interior of the outer pipe is communicated with the exterior of the outer pipe through the communicating port.

11. The balloon system of claim 10, wherein the distal end of the outer tube is axially proximally recessed, forming the communication port.

12. The balloon system according to claim 11, wherein the number of the communication ports is 1-5, and/or the length of the communication ports along the axial direction of the catheter assembly is 1-5 mm.

13. The balloon system of claim 1, further comprising a connector; the connecting piece is provided with an accommodating cavity which is opened towards the far end, and the near end of the catheter assembly is inserted into the accommodating cavity; the radial size of the accommodating cavity is gradually increased from the proximal end to the distal end; or the accommodating cavity comprises more than two sections which are sequentially arranged along the axial direction of the catheter assembly, and the radial sizes of the more than two sections are sequentially increased from the proximal end to the distal end.

14. The balloon system of claim 1, wherein an outer surface of the balloon has a hydrophobic coating.