Spiral electrode, electrode pair and shock wave balloon catheter

Abstract

The embodiment of the utility model provides a spiral electrode, an electrode pair and a shock wave balloon catheter, and relates to the field of interventional medical instruments. The spiral electrode is suitable for the shock wave balloon catheter and comprises a spiral part and a first installation part, the spiral part is used for discharging electricity to the spiral part of the other spiral electrode, the first installation part is connected to one end of the spiral part, the first installation part is provided with a first attaching face, and the first attaching face is used for attaching to the outer wall of an inner tube of a shock wave balloon. Due to the fact that the spiral electrode is provided with the first installation part, and the first attaching face of the first installation part can be attached to the outer wall of the inner tube of the shock wave balloon, the contact area of the spiral electrode and the outer wall of the inner tube is increased, and the spiral electrode can be stably installed on the inner tube in the balloon conveniently.

Description

Technical Field

[0001] The utility model relates to the field of interventional medical devices, and more particularly to a spiral electrode, an electrode pair and a shock wave balloon catheter. Background Art

[0002] The shock wave balloon catheter has significant clinical significance for the recanalization of severely calcified blood vessels.

[0003] In the prior art, some shock wave balloon catheters have electrodes with a spiral structure inside the balloon, but it is difficult to firmly fix the electrodes with the spiral structure on the inner tube inside the balloon. Summary of the Utility Model

[0004] The utility model provides a spiral electrode, an electrode pair and a shock wave balloon catheter, which can facilitate the stable installation of the spiral electrode on the inner tube inside the balloon.

[0005] Embodiments of the utility model may be implemented as follows:

[0006] In a first aspect, the utility model provides a spiral electrode suitable for a shock wave balloon catheter, the spiral electrode comprising:

[0007] a spiral part for discharging electricity to the spiral part of another spiral electrode; and

[0008] a first mounting part connected to one end of the spiral part, the first mounting part having a first fitting surface for fitting the outer wall of the inner tube of the shock wave balloon catheter.

[0009] In an alternative embodiment, the spiral electrode further comprises a second mounting part, the second mounting part and the first mounting part are respectively connected to both ends of the spiral part; the second mounting part has a second fitting surface for fitting the outer wall of the inner tube of the shock wave balloon catheter.

[0010] In an alternative embodiment, both the first mounting part and the second mounting part are in the structure of an arc-shaped plate body, both the first fitting surface and the second fitting surface are arc-shaped fitting surfaces, the length of the first mounting part is 1.3 - 2 times the length of the second mounting part, the width of the first mounting part is equal to the width of the second mounting part, and the width of the first mounting part is 0.2 - 0.35 mm.

[0011] In an alternative embodiment, the working length of the spiral part is an integer multiple of the pitch of the spiral part, and the width of the spiral part is 0.18 - 0.36 mm.

[0012] In an alternative embodiment, the first mounting part is provided with a wire connection hole.

[0013] In a second aspect, the present utility model provides an electrode pair, comprising two spiral electrodes according to any one of the foregoing embodiments.

[0014] In a third aspect, the present utility model provides a shock wave balloon catheter, comprising a catheter body, a balloon, and two spiral electrodes according to the foregoing embodiments. The two spiral electrodes are spirally wound around the outer wall of the inner tube of the catheter body, and the two spiral electrodes are spaced apart. The balloon is connected to the catheter body, and the first fitting surface fits the outer wall of the inner tube of the shock wave balloon catheter.

[0015] In an optional embodiment, the shock wave balloon catheter further comprises a first fixing tube and a second fixing tube. The spiral electrode further comprises a second mounting portion, and the second mounting portion and the first mounting portion are respectively connected to two ends of the spiral portion. The second mounting portion has a second fitting surface for fitting the outer wall of the inner tube of the shock wave balloon catheter.

[0016] Wherein, the first fixing tube is sleeved on the outer walls of the first mounting portions of the two spiral electrodes at the same time, and the first fixing tube is connected to the inner tube of the catheter body. The second fixing tube is sleeved on the outer walls of the second mounting portions of the two spiral electrodes at the same time, and the second fixing tube is connected to the inner tube of the catheter body.

[0017] In an optional embodiment, the shock wave balloon catheter further comprises a first insulating member and a second insulating member. The first insulating member is disposed between the first mounting portions of the two spiral electrodes, and the second insulating member is disposed between partial structures of the spiral portions of the two spiral electrodes.

[0018] The first insulating member has a strip-like structure, and the length of the first insulating member is greater than the length of the first mounting portion.

[0019] In an optional embodiment, the shock wave balloon catheter further comprises a first wire and a second wire. Wire connection holes are provided in the first mounting portions of the two spiral electrodes. The first wire is connected to one of the wire connection holes, and the second wire is connected to the other wire connection hole.

[0020] The beneficial effects of the spiral electrode, the electrode pair, and the shock wave balloon catheter according to the embodiments of the present utility model include, for example:

[0021] The present utility model provides a spiral electrode, which is applicable to a shock wave balloon catheter. The spiral electrode includes a spiral part and a first mounting part. The spiral part is used to discharge electricity to the spiral part of another spiral electrode. The first mounting part is connected to one end of the spiral part. The first mounting part has a first fitting surface, which is used to fit the outer wall of the inner tube of the shock wave balloon catheter. Since the spiral electrode has a first mounting part, and the first fitting surface of the first mounting part can fit the outer wall of the inner tube of the shock wave balloon catheter, the contact area between the spiral electrode and the outer wall of the inner tube is increased, facilitating the stable installation of the spiral electrode on the inner tube inside the balloon.

[0022] The present utility model provides an electrode pair, which includes two of the above-mentioned spiral electrodes, and the electrode pair has all the functions of the above-mentioned spiral electrode.

[0023] The present utility model provides a shock wave balloon catheter, which includes a tube body, a balloon, and two of the above-mentioned spiral electrodes. The two spiral electrodes are spirally wound around the outer wall of the inner tube of the tube body, and the two spiral electrodes are spaced apart. The balloon is connected to the tube body, and the first fitting surface fits the outer wall of the inner tube of the shock wave balloon. The shock wave balloon catheter has all the functions of the above-mentioned spiral electrode. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0025] Figure 1 Partial structural schematic diagram of the shock wave balloon catheter provided in the embodiment of the present utility model;

[0026] Figure 2 For Figure 1 Schematic diagram with the balloon, the first fixing tube, and the second fixing tube hidden;

[0027] Figure 3 For Figure 1 Cross-sectional view at A-A in ;

[0028] Figure 4 First perspective schematic diagram of the electrode pair provided in the embodiment of the present utility model;

[0029] Figure 5 Second perspective schematic diagram of the electrode pair provided in the embodiment of the present utility model;

[0030] Figure 6 Third perspective schematic diagram of the electrode pair provided in the embodiment of the present utility model.

[0031] Icons: 100 - helical electrode; 110 - helical part; 120 - first mounting part; 121 - first fitting surface; 122 - wire connection hole; 130 - second mounting part; 200 - inner tube; 300 - balloon; 301 - inner cavity; 410 - first fixing tube; 420 - second fixing tube; 510 - first insulating part; 520 - second insulating part; 530 - third insulating part; 610 - first wire; 620 - second wire; 710 - first imaging ring; 720 - second imaging ring; 1000 - electrode pair. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0036] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0037] It should be noted that the features in the embodiments of the present utility model can be combined with each other without conflict.

[0038] As mentioned in the background art, the shock wave balloon catheter has significant clinical significance for the recanalization of severely calcified blood vessels.

[0039] In the prior art, the internal electrodes of some shock wave balloon catheters adopt a porous hollow tube structure. A plurality of hollow tubes are uniformly fixed on the inner tube inside the balloon to form a plurality of shock wave sources. However, the hollow tube electrodes cause a drastic change in the stiffness of the inner tube. The inner tube between the hollow tubes is prone to folding when passing through a more tortuous diseased blood vessel, resulting in the shock wave balloon being easily stuck at the calcified lesion, thus causing unnecessary harm to the patient (such as the presence of balloon residues remaining in the body and the need for surgical removal of large foreign bodies, etc.). In addition, the length of the hollow tube electrodes is small, and the circular holes of the electrodes are prone to electrocorrosion during the treatment process, resulting in the hollow tube electrodes falling off from the inner tube, affecting the treatment effect and increasing the risk of injury to the patient.

[0040] Some of the shock wave balloon catheters have electrodes with a spiral structure inside the balloon, but it is difficult for the electrodes with a spiral structure to be firmly fixed on the inner tube inside the balloon.

[0041] In view of this, please refer to Figures 1 - 6 , the spiral electrode 100, the electrode pair 1000 and the shock wave balloon catheter provided in the embodiments of the present invention can solve this problem, and will be described in detail below.

[0042] Please refer to Figures 1 - 3 , an embodiment of the present invention provides a shock wave balloon catheter. The shock wave balloon catheter includes a tube body, a balloon 300 and an electrode pair 1000. The electrode pair 1000 includes two spiral electrodes 100. The two spiral electrodes 100 are spirally wound around the outer wall of the inner tube 200 of the tube body. The two spiral electrodes 100 are spaced apart to facilitate the discharge between the two spiral electrodes 100 to form a shock wave. Among them, the balloon 300 is connected to the tube body, and the first fitting surface 121 fits the outer wall of the inner tube 200 of the shock wave balloon catheter.

[0043] The spiral electrodes 100 of the electrode pair 1000 can be firmly installed on the outer wall of the inner tube 200 of the tube body. Specifically, the spiral electrode 100 is applicable to the shock wave balloon catheter. The spiral electrode 100 includes a spiral portion 110 and a first mounting portion 120. The spiral portion 110 is used for discharging to the spiral portion 110 of another spiral electrode 100. The first mounting portion 120 is connected to one end of the spiral portion 110. The first mounting portion 120 has a first fitting surface 121, and the first fitting surface 121 is used for fitting the outer wall of the inner tube 200 of the shock wave balloon catheter.

[0044] Since the helical electrode 100 has a first mounting portion 120, and the first fitting surface 121 of the first mounting portion 120 can fit the outer wall of the inner tube 200 of the shock wave balloon catheter, the contact area between the helical electrode 100 and the outer wall of the inner tube 200 is increased, facilitating the stable installation of the helical electrode 100 on the inner tube 200 inside the balloon 300.

[0045] Meanwhile, since the shock wave balloon catheter has the helical electrode 100, the helical electrode 100 ensures a gradual change in the stiffness of the inner tube 200, preventing the inner tube 200 from folding during passage through tortuous blood vessels or during the treatment process, thereby reducing the risk of the balloon 300 getting stuck at the lesion site due to the folding of the inner tube 200. The electrode length of the helical electrode 100 is much longer than the existing electrode designs, and the electrode is not likely to break due to electrocorrosion during the treatment process, thus improving the success rate of the operation and reducing the risk of injury to the patient.

[0046] It should be noted that in this application, the defined terms "proximal end" and "distal end" are common terms in the medical field. Specifically, the "distal end" refers to the end far from the operator during the surgical operation, and the "proximal end" refers to the end close to the operator during the surgical operation.

[0047] The tube body here can be understood to include the inner tube 200 and an outer tube (not shown in the figure) sleeved outside the inner tube 200. The distal end of the inner tube 200 passes through the inner cavity 301 of the balloon 300, and the distal end of the balloon 300 is fixed to the distal end of the inner tube 200. The balloon 300 can be made of a semi-compliant material Pebax or a non-compliant material nylon. The balloon 300 has an inner cavity 301, and the inner cavity 301 can be filled with a conductive liquid to inflate the balloon 300. The burst pressure of the balloon 300 can reach up to 24 atm at most.

[0048] Among them, the inner tube 200 is a composite tube body structure, and the tube body is composed of a PTFE layer, a pebax layer, and a nylon layer from the inside to the outside.

[0049] The shock wave balloon catheter further includes a first imaging ring 710 (which can be understood as the proximal imaging ring) and a second imaging ring 720 (which can be understood as the distal imaging ring). Both the first imaging ring 710 and the second imaging ring 720 can be installed on the inner tube 200 by forging. The material of the first imaging ring 710 can be tantalum, platinum-tungsten alloy, platinum, or platinum-iridium alloy, and platinum-iridium alloy can be preferably selected.

[0050] Of course, the material of the second imaging ring 720 can also be tantalum, platinum-tungsten alloy, platinum, or platinum-iridium alloy, and platinum-iridium alloy can be preferably selected.

[0051] In addition, it should be noted that the spiral portions 110 of the two spiral electrodes 100 can be left-handed or right-handed. The material of the spiral electrode 100 can be nitinol, stainless steel, platinum, titanium, titanium alloy or tungsten copper alloy. In this way, the spiral electrode 100 can have good corrosion resistance.

[0052] In addition, the spiral electrode 100 in this embodiment can be made by laser cutting a metal round tube (the material of the metal tube can be nitinol, stainless steel, platinum, titanium, titanium alloy or tungsten copper alloy).

[0053] In this embodiment, the pitches P of the two spiral electrodes 100 (as Figure 5 shown) are equal. Specifically, the pitch size of the spiral electrode 100 can be processed according to specific circumstances. In addition, the widths of the two spiral electrodes 100 are also equal. The width W1 of the spiral portion 110 of the spiral electrode 100 can be 0.18 - 0.36 mm. For example, the width W1 of the spiral portion 110 of the spiral electrode 100 is 0.18 mm or 0.36 mm or 0.27 mm. Preferably, the width W1 of the spiral electrode 100 is 0.2 mm. The distance s between the two spiral electrodes 100 can be 0.08 - 0.16 mm. For example, the distance between the two spiral electrodes 100 can be 0.08 mm or 0.16 mm or 0.12 mm. Preferably, the distance between the two spiral electrodes 100 can be 0.08 mm.

[0054] Please continue to refer to Figure 4 and Figure 5 , in addition, in order to enhance the stability of the spiral electrode 100 on the inner tube 200, the spiral electrode 100 further includes a second mounting portion 130. The second mounting portion 130 and the first mounting portion 120 are respectively connected to both ends of the spiral portion 110. The second mounting portion 130 has a second fitting surface, and the second fitting surface is used to fit the outer wall of the inner tube 200 of the shock wave balloon catheter.

[0055] It is easy to understand that the second mounting portion 130 is closer to the distal end of the inner tube 200 than the first mounting portion 120.

[0056] Both the first mounting portion 120 and the second mounting portion 130 are in the shape of an arc-shaped plate structure. The first fitting surface 121 and the second fitting surface are both arc-shaped fitting surfaces. The width W2 of the first mounting portion 120 is equal to the width of the second mounting portion 130.

[0057] Among them, the width W2 of the first mounting portion 120 can be 0.2 - 0.35 mm. For example, the width W2 of the first mounting portion 120 can be 0.2 mm or 0.35 mm or 0.27 mm.

[0058] It should be noted that in this embodiment, the working length L3 of the helical portion 110 is an integer multiple of the pitch of the helical portion 110. Here, the working length L3 of the helical portion 110 can be understood as the distance between the two ends of the helical portion 110.

[0059] In addition, please refer again to Figure 1 and Figure 2 , the shock wave balloon catheter further includes a first wire 610 and a second wire 620. Wire connection holes 122 are provided in the first mounting portions 120 of the two helical electrodes 100. The first wire 610 is connected to one of the wire connection holes 122, and the second wire 620 is connected to the other wire connection hole 122.

[0060] The wire connection hole 122 is a through hole. The shape of the wire connection hole 122 can be square, circular or oval. Preferably, the shape of the wire connection hole 122 is square.

[0061] For example, the first wire 610 can be wound around the first mounting portion 120 by passing through the wire connection hole 122 multiple times. Of course, the first wire 610 can also be connected to the first mounting portion 120 by soldering. The connection method of the second wire 620 to the other wire connection hole 122 can refer to the connection method of the first wire 610 and the first mounting portion 120, which will not be elaborated here.

[0062] Please refer to Figure 5 , it should be noted that in this embodiment, the length L1 of the first mounting portion 120 is 1.3 - 2 times the length L2 of the second mounting portion 130. Since the wire connection hole 122 needs to be opened in the first mounting portion 120, in order to ensure the strength of the first mounting portion 120, the length L1 of the first mounting portion 120 is greater than the length L2 of the second mounting portion 130. At the same time, the contact area between the first mounting portion 120 and the inner tube 200 is increased to avoid the sliding of the helical electrode 100.

[0063] In addition, it should be noted that the sizes or shapes of the first mounting portions 120 of the two helical electrodes 100 can be the same or different. Of course, the sizes or shapes of the second mounting portions 130 of the two helical electrodes 100 can also be the same or different.

[0064] In this embodiment, the lengths L1 of the first mounting portions 120 of the two helical electrodes 100 are equal, the widths W2 of the first mounting portions 120 of the two helical electrodes 100 are equal, the lengths L2 of the second mounting portions 130 of the two helical electrodes 100 are equal, the widths W3 of the second mounting portions 130 of the two helical electrodes 100 are equal, the widths W1 of the helical portions 110 of the two helical electrodes 100 are equal, and the thicknesses of the helical portions 110 of the two helical electrodes 100 are also equal.

[0065] In addition, in this embodiment, please refer to Figure 2 , the shock wave balloon catheter further includes a first insulating member 510 and a second insulating member 520. The materials of the first insulating member 510 and the second insulating member 520 can both be made of polyimide or polyurethane or a mixture of these two, namely polyimide and polyurethane. The first insulating member 510 is disposed between the first mounting portions 120 of the two helical electrodes 100, and the second insulating member 520 is disposed between partial structures of the helical portions 110 of the two helical electrodes 100.

[0066] Specifically, both the first insulating member 510 and the second insulating member 520 can be fixed on the inner tube 200 by laser welding or UV bonding.

[0067] Among them, the first insulating member 510 has a strip structure. The first insulating member 510 is embedded between the first mounting portions 120 of the two helical electrodes 100. The thickness of the first insulating member 510 is equal to the thickness D1 of the first mounting portion 120, and the length of the first insulating member 510 is greater than the length L1 of the first mounting portion 120 to prevent discharge between the two first mounting portions 120. Specifically, the length of the first insulating member 510 is about 0.3 mm longer than the length L1 of the first mounting portion 120, such as 0.29 mm or 0.31 mm.

[0068] In addition, the shock wave balloon catheter further includes a third insulating member 530. The third insulating member 530 also has a strip structure. The third insulating member 530 is embedded between the second mounting portions 130 of the two helical electrodes 100. The thickness of the third insulating member 530 is equal to the thickness D2 of the second mounting portion 130, and the length of the third insulating member 530 is greater than the length L2 of the second mounting portion 130 to prevent discharge between the two second mounting portions 130. Specifically, the length of the third insulating member 530 can be about 0.3 mm longer than the length L1 of the second mounting portion 130, such as 0.29 mm or 0.31 mm.

[0069] In this embodiment, starting from the starting point (which can be understood as the end of the helical portion 110 close to the first mounting portion 120), the second insulating member 520 (which can be in a strip shape) is provided at the end position of each turn of the helix. The width of the second insulating member 520 is equal to the distance between the helical portions 110 of the two helical electrodes 100, and the length of the second insulating member 520 is 0.05 - 0.1 times the pitch of the helical portion 110, specifically it can be 0.05 times or 0.5 times or 0.1 times. Preferably, the length of the second insulating member 520 is 0.05 times the pitch of the helical portion 110.

[0070] Among them, the number of the second insulating members 520 is two. One second insulating member 520 is located at the end position of the first turn of the helix, and the other second insulating member 520 is located at the end position of the second turn of the helix.

[0071] In addition, the second insulating member 520 can be fixed together with the inner tube 200 and the two spiral portions 110 by UV glue to prevent the two spiral electrodes 100 from crossing and short-circuiting during use.

[0072] It should be noted that, please refer to Figure 1 and Figure 2 , for the convenience of firmly installing the two spiral electrodes 100 on the inner tube 200, the shock wave balloon catheter further includes a first fixing tube 410 and a second fixing tube 420. The first fixing tube 410 and the second fixing tube 420 can both be understood to be made of insulating tube bodies. Among them, the first fixing tube 410 is simultaneously sleeved on the outer wall of the first mounting portion 120 of the two spiral electrodes 100, and the first fixing tube 410 and the inner tube 200 of the tube body can be connected by UV bonding or laser welding. The second fixing tube 420 is simultaneously sleeved on the outer wall of the second mounting portion 130 of the two spiral electrodes 100, and the second fixing tube 420 and the inner tube 200 of the tube body can also be connected by UV bonding or laser welding.

[0073] It should be noted that the length of the first fixing tube 410 can be equal to the length of the first insulating member 510, and the thickness of the first fixing tube 410 can be 1-2 times the thickness of the first mounting portion 120, such as 1 time or 2 times or 1.5 times. Preferably, the thickness of the first fixing tube 410 can be 1 time the thickness of the first mounting portion 120. The length of the second fixing tube 420 can be equal to the length of the third insulating member 530, and the thickness of the second fixing tube 420 can be 1-2 times the thickness of the second mounting portion 130, such as 1 time or 2 times or 1.5 times. Preferably, the thickness of the second fixing tube 420 can be 1 time the thickness of the second mounting portion 130.

[0074] It should be noted that, in this embodiment, the thicknesses of the first mounting portion 120 of the spiral electrode 100, the spiral portion 110, and the second mounting portion 130 can be the same.

[0075] In addition, it should be noted that the first imaging ring 710, the second imaging ring 720, the first insulating member 510, the second insulating member 520, the third insulating member 530, the first fixing tube 410, the second fixing tube 420, part of the structure of the electrode pair 1000, part of the structure of the first wire 610, part of the structure of the second wire 620, and the distal structure of the inner tube 200 are all located in the inner cavity 301 of the balloon 300.

[0076] It should also be noted that, in this embodiment, the inner diameter d of the spiral electrode 100 (as Figure 6 shown) is the same as the outer diameter of the inner tube 200.

[0077] In summary, the helical electrode 100 includes a helical portion 110 and a first mounting portion 120. The helical portion 110 is configured to discharge electricity to the helical portion 110 of another helical electrode 100. The first mounting portion 120 is connected to one end of the helical portion 110, and the first mounting portion 120 has a first fitting surface 121, which is used to fit against the outer wall of the inner tube 200 of the shock wave balloon catheter.

[0078] Since the helical electrode 100 has the first mounting portion 120, and the first fitting surface 121 of the first mounting portion 120 can fit against the outer wall of the inner tube 200 of the shock wave balloon catheter, the contact area between the helical electrode 100 and the outer wall of the inner tube 200 is increased, facilitating the stable installation of the helical electrode 100 on the inner tube 200 inside the balloon catheter.

[0079] The electrode pair 1000 includes two such helical electrodes 100, and the electrode pair 1000 has all the functions of the above-mentioned helical electrode 100.

[0080] The shock wave balloon catheter includes a tube body, a balloon 300, and two helical electrodes 100 of the foregoing embodiments. The two helical electrodes 100 are helically wound around the outer wall of the inner tube 200 of the tube body, and the two helical electrodes 100 are spaced apart. The balloon 300 is connected to the tube body, and the first fitting surface 121 fits against the outer wall of the inner tube 200 of the shock wave balloon catheter. The shock wave balloon catheter has all the functions of the above-mentioned helical electrode 100.

[0081] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A spiral electrode suitable for a shock wave balloon catheter, characterized in that: The spiral electrode comprises: a spiral portion (110) for discharging toward a spiral portion (110) of another spiral electrode; and A first mounting portion (120), wherein the first mounting portion (120) is connected to one end of the spiral portion (110), and the first mounting portion (120) has a first fitting surface (121), and the first fitting surface (121) is used to fit the outer wall of the inner tube (200) of the shock wave balloon catheter.

2. The spiral electrode according to claim 1, characterized in that: The spiral electrode further comprises a second mounting portion (130), wherein the second mounting portion (130) and the first mounting portion (120) are respectively connected to two ends of the spiral portion (110); the second mounting portion (130) has a second fitting surface, and the second fitting surface is used to fit the outer wall of the inner tube (200) of the shock wave balloon catheter.

3. The spiral electrode according to claim 2, characterized in that: The first mounting portion (120) and the second mounting portion (130) are both arc-shaped plate structures, the first fitting surface (121) and the second fitting surface are both arc-shaped fitting surfaces, the length of the first mounting portion (120) is 1.3-2 times the length of the second mounting portion (130), the width of the first mounting portion (120) is equal to the width of the second mounting portion (130), and the width of the first mounting portion (120) is 0.2-0.35 mm.

4. The spiral electrode according to claim 3, characterized in that: The working length of the spiral portion (110) is an integral multiple of the pitch of the spiral portion (110), and the width of the spiral portion (110) is 0.18-0.36 mm.

5. The spiral electrode according to claim 1, characterized in that: The first mounting portion (120) is provided with a wire connection hole (122).

6. An electrode pair, characterized in that: The invention comprises two spiral electrodes according to any one of claims 1 to 5.

7. A shock wave balloon catheter, characterized in that: It comprises a tube body, a balloon (300) and two spiral electrodes according to claim 1, wherein the two spiral electrodes are spirally wound around the outer wall of the inner tube (200) of the tube body, the two spiral electrodes are spaced apart, the balloon (300) is connected to the tube body, and the first fitting surface (121) fits the outer wall of the inner tube (200) of the shock wave balloon catheter.

8. The shock wave balloon catheter according to claim 7, characterized in that: The shock wave balloon catheter further comprises a first fixing tube (410) and a second fixing tube (420), and the spiral electrode further comprises a second mounting portion (130), wherein the second mounting portion (130) and the first mounting portion (120) are respectively connected to two ends of the spiral portion (110); the second mounting portion (130) has a second fitting surface, and the second fitting surface is used to fit the outer wall of the inner tube (200) of the shock wave balloon catheter; The first fixed tube (410) is simultaneously sleeved on the outer wall of the first mounting parts (120) of the two spiral electrodes, and the first fixed tube (410) is connected to the inner tube (200) of the tube body; the second fixed tube (420) is simultaneously sleeved on the outer wall of the second mounting parts (130) of the two spiral electrodes, and the second fixed tube (420) is connected to the inner tube (200) of the tube body.

9. The shock wave balloon catheter according to claim 7, characterized in that: The shock wave balloon catheter further comprises a first insulating member (510) and a second insulating member (520), wherein the first insulating member (510) is arranged between the first mounting portions (120) of the two spiral electrodes, and the second insulating member (520) is arranged between partial structures of the spiral portions (110) of the two spiral electrodes; The first insulating member (510) is in a strip-shaped structure, and the length of the first insulating member (510) is greater than the length of the first mounting portion (120).

10. The shock wave balloon catheter according to claim 7, characterized in that: The shock wave balloon catheter also includes a first wire (610) and a second wire (620), and the first mounting portions (120) of the two spiral electrodes are each provided with a wire connection hole (122), the first wire (610) is connected to one of the wire connection holes (122), and the second wire (620) is connected to the other wire connection hole (122).

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