balloon catheter with outer braiding

Abstract

This invention provides a balloon catheter with an external braided covering, relating to the field of medical device technology. The balloon catheter with the external braided covering uses a catheter element that passes through a balloon, and the catheter element has an infusion channel in fluid communication with the balloon. A braided mesh protects the outside of the balloon, and at least two connecting ribs are circumferentially spaced along the outer surface of the braided mesh, connecting the balloon and / or the braided mesh. This increases the burst pressure of the balloon, allows the braided mesh to contact harder calcified areas, preventing balloon burst damage, and improves the balloon's puncture resistance. In the inflated state, the braided mesh adheres to the outer surface of the balloon, and at least two connecting ribs expand radially along the balloon. In the deflated state, the braided mesh contracts and folds with the balloon, and the connecting ribs support the folded balloon and braided mesh, improving the structural stability of the balloon catheter.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a balloon catheter with an outer braided coating. Background Technology

[0002] When using a balloon catheter, the balloon is inflated to open up the calcified lesion. Combined with the shock wave applied to the balloon, the softening effect on the calcified lesion can be improved. However, because the calcified sites vary in shape and are relatively hard, they are prone to balloon rupture damage. Especially under the action of the shock wave, the balloon rupture pressure is relatively low, further increasing the risk of balloon rupture or puncture.

[0003] In addition, the woven mesh and balloon will produce irregular wrinkles when in the contracted state, which will cause the radial dimension of the balloon catheter to be larger when in the contracted state, increasing the difficulty of implantation and withdrawal. Summary of the Invention

[0004] The purpose of this invention is to provide a balloon catheter with an outer braided material to alleviate the technical problem of easy breakage of balloon catheters in the prior art.

[0005] In a first aspect, the balloon catheter with an outer braided covering provided by the present invention includes: a balloon, a catheter component, a braided mesh, and at least two connecting ribs;

[0006] The catheter extends through the balloon and is provided with an infusion channel in fluid communication with the balloon;

[0007] The woven mesh is disposed on the outside of the balloon;

[0008] At least two of the connecting ribs are spaced apart circumferentially along the outer surface of the woven mesh, and at least two of the connecting ribs are connected to the balloon and / or the woven mesh;

[0009] When the balloon is inflated, the woven mesh is attached to the outer surface of the balloon, and at least two of the connecting ribs are extended radially along the balloon.

[0010] In the balloon's contracted state, the woven mesh contracts and folds along with the balloon, and the connecting ribs restrain the folded balloon and the woven mesh.

[0011] In conjunction with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the woven mesh has a plurality of bendable portions, the plurality of bendable portions being arranged at circumferential intervals along the balloon;

[0012] A shaping portion is configured between any two adjacent bendable portions;

[0013] Both the connecting rib and the balloon are connected to the shaping part.

[0014] In conjunction with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the weaving density of the shaping portion is greater than the weaving density of the bendable portion.

[0015] In conjunction with the first possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the balloon includes multiple sidewalls, and the multiple sidewalls are sequentially arranged and connected along the circumference of the balloon;

[0016] Any section of the sidewall includes: an inner arc segment, a first side wing segment, and a second side wing segment, wherein the inner arc segment, the first side wing segment, and the second side wing segment are connected in sequence;

[0017] The inner arc segment and the second side wing segment form a first bend, the inner arc segment and the first side wing segment form a second bend, and the first side wing segment and the second side wing segment form a third bend.

[0018] When the balloon is inflated, multiple inner arc segments, multiple first lateral wing segments, and multiple second lateral wing segments unfold along the circumferential direction of the balloon.

[0019] In the balloon's contracted state, multiple inner arc segments are spliced ​​together along the circumference of the balloon, and any two adjacent first and second side wing segments are folded and attached to the outer side of the inner arc segment.

[0020] In conjunction with the third possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein both the first wing segment and the second wing segment are elastic;

[0021] During the process from the filled state to the contracted state, the first side wing segment and the second side wing segment are folded together along the third bend and extended along the involute.

[0022] The third bending portion abuts against the inside of the easily bending portion.

[0023] In conjunction with the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the connecting rib includes: a first elastic segment, a side arm segment, and a second elastic segment;

[0024] The proximal end of the first elastic segment is connected to the catheter, and the distal end of the first elastic segment is connected to the side arm segment. From the proximal end to the distal end, the first elastic segment is inclined in a direction away from the axis of the catheter.

[0025] The proximal end of the second elastic segment is connected to the side arm segment, and the distal end of the second elastic segment is connected to the catheter or guide head. From the proximal end to the distal end, the second elastic segment is inclined in a direction close to the axis of the catheter.

[0026] In conjunction with the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the woven mesh includes a plurality of woven loops, the plurality of woven loops being spaced apart along the axial direction of the balloon and respectively surrounding the outside of the balloon.

[0027] In conjunction with the sixth possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the braided ring is woven from filaments;

[0028] The cross-section of the filament is circular, and the diameter of the cross-section of the filament is 10μm to 300μm;

[0029] Alternatively, the cross-section of the filament is flat, and the cross-section of the filament in the axial direction of the balloon is 100μm to 500μm, and the cross-section of the filament in the radial direction of the balloon is 30μm to 200μm.

[0030] In conjunction with the first aspect, the present invention provides an eighth possible implementation of the first aspect, wherein the conduit includes: an outer tube and an inner tube;

[0031] The proximal end of the balloon is connected to the outer tube, the inner tube passes through the outer tube and the balloon, and the distal end of the balloon is connected to the inner tube.

[0032] The infusion channel is formed between the outer tube and the inner tube, and the infusion channel is connected to the balloon.

[0033] In conjunction with the first aspect, the present invention provides a ninth possible implementation of the first aspect, wherein a shock wave generator is installed inside the balloon and the shock wave generator is connected to the catheter.

[0034] The embodiments of this invention bring the following beneficial effects: By using a catheter that passes through the balloon and has an infusion channel in fluid communication with the balloon, and a braided mesh placed outside the balloon to protect it, at least two connecting ribs are spaced circumferentially along the outer surface of the braided mesh and connect it to the balloon and / or the braided mesh. This increases the burst pressure of the balloon, allows the braided mesh to contact harder calcified areas, preventing balloon burst damage, and improves the balloon's puncture resistance. In the inflated state, the braided mesh adheres to the outer surface of the balloon, and at least two connecting ribs expand radially along the balloon. In the deflated state, the braided mesh contracts and folds with the balloon, and the connecting ribs restrain the folded balloon and braided mesh, alleviating irregular wrinkles and preventing breakage due to these wrinkles. It also helps to reduce the radial dimension of the balloon catheter in the deflated state, lowering the difficulty of balloon catheter implantation and withdrawal.

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a front view of a balloon catheter with an outer braided covering provided in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram showing the unfolding of the braided mesh and connecting ribs of a balloon catheter with an outer braided cover provided in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram showing the unfolding of another type of braided mesh and connecting ribs of the balloon catheter with an outer braided covering provided in an embodiment of the present invention;

[0040] Figure 4 Left view of a balloon catheter with an outer braided fabric provided in an embodiment of the present invention;

[0041] Figure 5 A radial cross-sectional schematic diagram of a balloon catheter with an outer braided fabric provided in an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the radial cross section of the outer woven fabric provided in the embodiment of the present invention during the process from the self-filled state to the shrinkage state;

[0043] Figure 7 This is a schematic diagram of the radial cross-section of the outer woven fabric in a contracted state, as provided in an embodiment of the present invention.

[0044] Icons: 100 - Balloon; 101 - First bend; 102 - Second bend; 103 - Third bend; 110 - Inner arc segment; 120 - First lateral segment; 130 - Second lateral segment; 200 - Catheter fitting; 201 - Infusion channel; 210 - Outer tube; 220 - Inner tube; 300 - Braided mesh; 301 - Flexible section; 302 - Shaping section; 400 - Connecting rib; 410 - First elastic segment; 420 - Side arm segment; 430 - Second elastic segment; 500 - Guide head; 600 - Imaging ring. Detailed Implementation

[0045] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] like Figure 1 , Figure 2 and Figure 3As shown, the balloon catheter with an outer braided covering provided in this embodiment of the invention includes: a balloon 100, a catheter component 200, a braided mesh 300, and at least two connecting ribs 400; the catheter component 200 passes through the balloon 100, and the catheter component 200 is provided with an infusion channel 201 in fluid communication with the balloon 100; the braided mesh 300 is disposed on the outside of the balloon 100; at least two connecting ribs 400 are circumferentially spaced along the outer surface of the braided mesh 300, and at least two connecting ribs 400 are connected to the balloon 100 or the braided mesh 300, and it is also possible to connect both the balloon 100 and the braided mesh 300 to the connecting ribs 400.

[0049] In this embodiment, there are 3 connecting ribs 400, and the two ends of the connecting ribs are connected and fixed to the two ends of the balloon axially.

[0050] The connecting ribs 400 are elastic. When the balloon 100 is inflated, the braided mesh 300 adheres to the outer surface of the balloon 100. At least two connecting ribs 400 expand with the balloon 100 and unfold radially along the balloon 100. The braided mesh 300 provides protection for the balloon 100, increasing its burst pressure. It can contact harder calcified areas, preventing burst damage and improving the balloon 100's puncture resistance. The connecting ribs 400 connect and fix the balloon 100 and the braided mesh 300, binding them and causing regular bends along the ribs. This reduces the risk of rupture compared to irregular folds and allows for a smaller radial dimension of the balloon catheter in the deflated state.

[0051] When the balloon 100 is in the contracted state, the woven mesh 300 contracts and folds along with the balloon 100, and the connecting rib 400 supports the folded balloon 100 and the woven mesh 300. By supporting and binding the folded balloon 100 and the woven mesh 300 with the connecting rib 400, the compression of the balloon 100 can be promoted, while avoiding irregular shapes of the balloon 100 and the woven mesh 300 after contraction.

[0052] like Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the woven mesh 300 has multiple bendable portions 301, which are spaced apart along the circumference of the balloon 100; a shaping portion 302 is configured between any two adjacent bendable portions 301; the connecting rib 400 and the balloon 100 are both connected to the shaping portion 302.

[0053] The bendable portion 301 is more flexible than the shaping portion 302. When the balloon 100 is in the contracted state, the braided mesh 300 can produce creases at the bendable portion 301, thereby forming a regular folded contraction. This can avoid irregular wrinkles that could cause damage to the balloon 100 and the braided mesh 300, and can also make the radial dimension of the balloon catheter smaller after contraction, which is easier for the balloon catheter to be implanted and withdrawn.

[0054] In this embodiment, the weaving density of the shaping part 302 is greater than that of the bendable part 301, thereby giving the shaping part 302 better bending strength than the bendable part 301. When the balloon 100 contracts, the bendable part 301 bends first, which in turn causes the woven mesh 300 to compress the balloon 100, and the woven mesh 300 and the balloon 100 fold and contract synchronously.

[0055] In an alternative embodiment, the shaping part 302 and the bendable part 301 may be made of different materials, so that the bendable part 301 can be bent more easily than the shaping part 302.

[0056] like Figure 6 and Figure 7 As shown, the balloon 100 includes multiple sidewalls, which are sequentially arranged and connected along the circumference of the balloon 100. Each sidewall includes an inner arc segment 110, a first wing segment 120, and a second wing segment 130, which are sequentially connected. Any two adjacent sidewalls are connected by the inner arc segment 110 and the second wing segment 130, forming a first bend 101 at the connection between the inner arc segment 110 and the second wing segment 130, and a second bend 102 at the connection between the inner arc segment 110 and the first wing segment 120. A third bend 103 is formed at the connection point 130; when the balloon 100 is inflated, multiple inner arc segments 110, multiple first lateral wing segments 120, and multiple second lateral wing segments 130 unfold along the circumference of the balloon 100; when the balloon 100 is contracted, the multiple inner arc segments 110 are spliced ​​together along the circumference of the balloon 100 to form a circle, and any two adjacent first lateral wing segments 120 and second lateral wing segments 130 are folded and attached to the outside of the inner arc segment 110. The woven net 300 folds and contracts with the balloon 100, thereby achieving regular deformation and avoiding irregular wrinkles in the balloon 100 and the woven net 300 in the contracted state.

[0057] It should be noted that both the first side wing segment 120 and the second side wing segment 130 are elastic. During the process from the inflated state to the contracted state, the first side wing segment 120 and the second side wing segment 130 are folded along the third bend 103 and extend along the involute. The third bend 103 abuts against the inner side of the easily bendable portion 301. The concave side of the involute after the first side wing segment 120 and the second side wing segment 130 are oriented in the same direction as the circumferential direction of the guide tube 200. The orientation of the involute can be limited by the elastic direction of the first side wing segment 120 and the second side wing segment 130, or the size of the second side wing segment 130 in the circumferential direction of the balloon 100 can be slightly shorter than the size of the first side wing segment 120, so that the second side wing segment 130 is located on the concave side of the involute after the first side wing segment 120 and the second side wing segment 130 are folded.

[0058] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the connecting rib 400 includes: a first elastic segment 410, a side arm segment 420, and a second elastic segment 430; the proximal end of the first elastic segment 410 is connected to the conduit 200, and the distal end of the first elastic segment 410 is connected to the side arm segment 420, with the first elastic segment 410 inclined in a direction away from the axis of the conduit 200 from the proximal end to the distal end; the proximal end of the second elastic segment 430 is connected to the side arm segment 420, and the distal end of the second elastic segment 430 is connected to the guide head 500, with the second elastic segment 430 inclined in a direction close to the axis of the conduit 200 from the proximal end to the distal end.

[0059] When the balloon 100 contracts, the angle between the first elastic segment 410 and the axis of the catheter 200 decreases, and the angle between the second elastic segment 430 and the axis of the catheter 200 also decreases, thereby reducing the radial dimension of the balloon catheter. When the balloon catheter is inserted into the sheath of the delivery device, the inner wall of the sheath compresses the first elastic segment 410, thereby compressing the radial dimension of the balloon catheter, which allows the balloon catheter to be smoothly withdrawn.

[0060] In this embodiment of the invention, the woven mesh 300 includes a plurality of woven rings, which are spaced apart along the axial direction of the balloon 100 and respectively surround the outside of the balloon 100. This not only facilitates processing and assembly but also provides comprehensive circumferential protection for the balloon 100. Furthermore, increasing the density of the woven rings can increase the burst pressure of the balloon 100.

[0061] In one embodiment, the braided ring is made of woven filament; the cross-section of the filament is circular, and the diameter of the cross-section of the filament is 10μm to 300μm.

[0062] In another embodiment, the cross-section of the filament is flat, and the cross-section of the filament in the axial direction of the balloon 100 has a size of 100μm to 500μm, while the cross-section of the filament in the radial direction of the balloon 100 has a size of 30μm to 200μm.

[0063] In the above embodiments, the cross-sectional size of the filament is small, forming a fine filament structure, and preferably a flexible polymer material is used so that the braided ring can deform or stretch accordingly as the balloon 100 expands and contracts.

[0064] Furthermore, the spacing between any two adjacent braided loops is 1mm to 20mm. This spacing can be evenly distributed along the axial direction, and the density of the braided loops can be increased in localized axial regions, thereby increasing the burst pressure of the balloon 100 in those areas. In addition, the spacing between two adjacent braided loops can be radially adjusted according to the degree of calcification at the lesion site. To address severely calcified lesions, the balloon 100's puncture resistance can be improved by reducing the spacing between the braided loops and increasing the density of the braided loops.

[0065] In an alternative embodiment, the woven mesh 300 may be made of an elastic material and have a tendency to deform radially contract along the balloon 100 so that the woven mesh 300 fits tightly against the outside of the balloon 100.

[0066] like Figure 1 and Figure 5 As shown, the catheter assembly 200 includes an outer tube 210 and an inner tube 220; the proximal end of the balloon 100 is connected to the outer tube 210, the inner tube 220 passes through the outer tube 210 and the balloon 100, and the distal end of the balloon 100 is connected to the inner tube 220; an infusion channel 201 is formed between the outer tube 210 and the inner tube 220, and the infusion channel 201 communicates with the balloon 100.

[0067] By injecting fluid medium into the infusion channel 201, the balloon 100 can expand when the fluid medium is filled into it; when the fluid medium in the infusion channel 201 is aspirated outward, the fluid medium inside the balloon 100 can flow outward, creating a negative pressure state inside the balloon 100, which in turn causes the balloon 100 to contract.

[0068] In this embodiment, the balloon 100 may be a semi-compliant balloon or a non-compliant balloon.

[0069] Furthermore, a shock wave generator is installed inside the balloon 100 and is connected to the catheter component 200.

[0070] The shock wave generated by the shock wave generator can penetrate the balloon 100 and its internal fluid medium to impact the calcified lesion. The braided mesh 300 can prevent the calcified lesion from directly contacting the balloon 100. The wall thickness at the junction of the braided mesh 300 and the balloon 100 is increased, and the circumferential stress of the balloon 100 expansion is also reduced due to the restraint of the external braided mesh 300. The burst pressure is increased accordingly, and the balloon 100 can be prevented from being punctured by the calcified area.

[0071] Furthermore, the balloon 100 has an axial dimension of 10mm to 200mm in the catheter 200. Balloons 100 with various axial dimensions can be configured as needed to select the appropriate balloon 100 according to the size of the lesion site.

[0072] Furthermore, the diameter of the balloon 100 in its inflated state is greater than or equal to 2 mm. Inside the balloon 100, 1 to 20 shock wave generators are arranged axially. When the balloon 100 expands, the woven mesh 300 can undergo slight deformation along with the balloon 100, thereby generating expansion, compression and impact on the calcified area, thus softening the lesion.

[0073] Furthermore, a contrast-enhancing ring 600 is installed inside the balloon 100, and the contrast-enhancing ring 600 is connected to the catheter component 200. Contrast-enhancing rings 600 can be placed at the proximal and distal ends of the balloon 100 to detect and determine the implantation location of the balloon 100.

[0074] It should be noted that the braided mesh 300 is made of rigid polymer materials such as nylon or polyethylene. By configuring the density and width of the braided rings, the burst pressure of the balloon 100 can be adjusted, thereby improving the design flexibility of the balloon catheter burst pressure and puncture resistance.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A balloon catheter with an outer braided covering, characterized in that, include: The balloon (100), the catheter fitting (200), the braided mesh (300), and at least two connecting ribs (400). The catheter (200) passes through the balloon (100), and the catheter (200) is provided with an infusion channel (201) in fluid communication with the balloon (100). The woven mesh (300) is disposed on the outside of the balloon (100); At least two of the connecting ribs (400) are spaced apart circumferentially along the outer surface of the braided mesh (300), and at least two of the connecting ribs (400) are connected to the balloon (100) and / or the braided mesh (300). When the balloon (100) is inflated, the woven mesh (300) is attached to the outer surface of the balloon (100), and at least two of the connecting ribs (400) are spread out radially along the balloon (100); When the balloon (100) is in a contracted state, the woven mesh (300) contracts and folds along with the balloon (100), and the connecting rib (400) binds the folded balloon (100) and the woven mesh (300). The woven mesh (300) has a plurality of bendable portions (301) that are spaced apart circumferentially along the balloon (100); a shaping portion (302) is configured between any two adjacent bendable portions (301); the connecting rib (400) and the balloon (100) are both connected to the shaping portion (302).

2. The balloon catheter with an outer braided covering according to claim 1, characterized in that, The weaving density of the shaping part (302) is greater than that of the bendable part (301).

3. The balloon catheter with an outer braided covering according to claim 1, characterized in that, The balloon (100) includes multiple sidewalls, which are sequentially arranged and connected along the circumference of the balloon (100); Each of the aforementioned sidewalls includes: an inner arc segment (110), a first side wing segment (120), and a second side wing segment (130), wherein the inner arc segment (110), the first side wing segment (120), and the second side wing segment (130) are connected in sequence; The inner arc segment (110) forms a first bend (101) at the connection with the second side wing segment (130), the inner arc segment (110) forms a second bend (102) at the connection with the first side wing segment (120), and the first side wing segment (120) forms a third bend (103) at the connection with the second side wing segment (130). When the balloon (100) is inflated, multiple inner arc segments (110), multiple first wing segments (120) and multiple second wing segments (130) unfold along the circumferential direction of the balloon (100); In the contracted state of the balloon (100), multiple inner arc segments (110) are spliced ​​together along the circumferential direction of the balloon (100), and any two adjacent first wing segments (120) and second wing segments (130) are folded and attached to the outside of the inner arc segment (110).

4. The balloon catheter with an outer braided covering according to claim 3, characterized in that, Both the first wing section (120) and the second wing section (130) are elastic; During the process from the filled state to the contracted state, the first side wing segment (120) and the second side wing segment (130) are folded together along the third bend (103) and extended along the involute; The third bending portion (103) abuts against the inside of the easily bendable portion (301).

5. The balloon catheter with an outer braided covering according to claim 1, characterized in that, The connecting rib (400) includes: a first elastic segment (410), a side arm segment (420), and a second elastic segment (430); The proximal end of the first elastic segment (410) is connected to the catheter (200), and the distal end of the first elastic segment (410) is connected to the side arm segment (420). From the proximal end to the distal end, the first elastic segment (410) is inclined in a direction away from the axis of the catheter (200). The proximal end of the second elastic segment (430) is connected to the side arm segment (420), and the distal end of the second elastic segment (430) is connected to the guide head (500). From the proximal end to the distal end, the second elastic segment (430) is inclined in a direction close to the axis of the catheter (200).

6. The balloon catheter with an outer braided covering according to claim 1, characterized in that, The woven mesh (300) includes a plurality of woven loops, which are spaced apart along the axial direction of the balloon (100) and respectively surround the outside of the balloon (100).

7. The balloon catheter with an outer braided covering according to claim 6, characterized in that, The braided ring is made of woven wire. The cross-section of the filament is circular, and the diameter of the cross-section of the filament is 10μm to 300μm; Alternatively, the cross-section of the filament is flat, and the cross-section of the filament in the axial direction of the balloon (100) is 100μm to 500μm, and the cross-section of the filament in the radial direction of the balloon (100) is 30μm to 200μm.

8. The balloon catheter with an outer braided covering according to claim 1, characterized in that, The conduit fitting (200) includes: an outer tube (210) and an inner tube (220); The proximal end of the balloon (100) is connected to the outer tube (210), the inner tube (220) passes through the outer tube (210) and the balloon (100), and the distal end of the balloon (100) is connected to the inner tube (220); The infusion channel (201) is formed between the outer tube (210) and the inner tube (220), and the infusion channel (201) is connected to the balloon (100).

9. The balloon catheter with an outer braided covering according to claim 1, characterized in that, A shock wave generator is installed inside the balloon (100) and is connected to the catheter (200).

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