Electrode pair and shock wave balloon catheter

Abstract

The utility model discloses an electrode pair and a shock wave balloon catheter, which comprise an inner electrode arranged at the periphery of an inner tube of the shock wave balloon catheter, and an outer electrode arranged at the periphery of an outer tube of the shock wave balloon catheter, an insulator provided on the outer periphery of the inner electrode; the outer electrode is arranged on the periphery of the insulating part, the outer electrode is provided with a first opening so that the outer electrode can form a circumferential non-closed structure, and a buckling structure is formed at the first opening so that the two sides of the first opening can be connected together in a clamped mode. Due to the existence of the first opening, the outer electrode has the capacity of changing the radial size, the outer electrode is assembled by changing the radial size of the outer electrode, the outer electrode is in gapless fit with the insulating part, the overall radial size of the electrode pair is reduced, and the outer diameter of the shock wave balloon catheter corresponding to the electrode pair is reduced; the ability of the shock wave balloon catheter to pass through narrow tortuous blood vessels is improved. The buckle structure can prevent the outer electrode from falling off. The structure of the outer electrode can reduce the requirement for the inner diameter and the outer diameter of the outer electrode.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices. More specifically, it relates to an electrode pair. In addition, the utility model also relates to a shock wave balloon catheter including the above electrode pair and a shock wave balloon catheter system including the above shock wave balloon catheter. Background Art

[0002] Cardiovascular diseases have always been one of the important causes of death in the world population. Among them, atherosclerosis caused by plaque deposition on the blood vessel wall has a very high fatality and disability rate. The plaque on the blood vessel wall is composed of fat, cholesterol, calcium, thrombus, connective tissue, and other substances in the blood.

[0003] In recent years, intravascular lithotripsy (IVL) using shock waves has been widely used in the treatment of vascular calcification lesions. IVL uses a shock wave balloon catheter to emit unfocused, circumferential, and pulsed shock waves to the lesion site, which can efficiently and safely destroy superficial and deep calcifications, thereby improving vascular compliance and achieving the treatment purpose.

[0004] In the related art, the overall outer diameter at the electrode pair in the shock wave balloon catheter is too large, making the electrode pair the position with the largest outer diameter of the entire shock wave balloon catheter, thus weakening the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels and affecting the treatment effect.

[0005] Therefore, how to reduce the outer diameter size of the electrode pair is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0006] In view of this, the purpose of the utility model is to provide an electrode pair with a small outer diameter size.

[0007] Another purpose of the utility model is to provide a shock wave balloon catheter including the above electrode pair, and the size of the electrode pair is small.

[0008] Another purpose of the utility model is to provide a shock wave balloon catheter system including the above shock wave balloon catheter, and the size of the electrode pair is small.

[0009] In order to achieve the above purposes, the utility model provides the following technical solutions:

[0010] An electrode pair is applied to a shock wave balloon catheter and includes:

[0011] An inner electrode for being arranged on the outer peripheral part of the inner tube of the shock wave balloon catheter;

[0012] An insulating member arranged on the outer peripheral part of the inner electrode;

[0013] The outer electrode is provided on the outer peripheral portion of the insulating member. The outer electrode is provided with a first opening so that the outer electrode forms a circumferentially non-closed structure, and a snap structure is formed at the first opening so that both sides of the first opening are snap-connected together.

[0014] Optionally, the snap structure includes:

[0015] A first clamping portion and a second clamping portion are respectively provided on both sides of the outer electrode corresponding to the first opening. The first clamping portion and the second clamping portion are engaged with each other, and there is a gap between the two.

[0016] Optionally, the snap structure includes:

[0017] A third clamping portion and a fourth clamping portion are respectively provided on both sides of the outer electrode corresponding to the first opening;

[0018] A clamping member includes a fifth clamping portion and a sixth clamping portion. The fifth clamping portion is engaged with the third clamping portion, the sixth clamping portion is engaged with the fourth clamping portion, and the clamping member is detachably connected to the outer electrode or the clamping member is connected to the insulating member.

[0019] Optionally, one of the first clamping portion and the second clamping portion is a clamping groove, and the other is a snap projection. The clamping groove is provided on the first side of the outer electrode corresponding to the first opening; the snap projection protrudes from the second side of the outer electrode corresponding to the first opening.

[0020] Optionally, the snap projection includes:

[0021] A connecting portion, one end of which is connected to the second side and extends in the circumferential direction of the outer electrode away from the second side;

[0022] A clamping portion, which is connected to the end of the connecting portion away from the second side, and the clamping portion protrudes from at least one side of the connecting portion.

[0023] Optionally, the clamping portion and the connecting portion form at least one of a T-shaped structure and an L-shaped structure.

[0024] Optionally, the clamping portion is in a shape of a straight line, a circle or an ellipse.

[0025] Optionally, along the direction from the end of the snap projection connected to the second side to the end thereof away from the second side, at least a part of the width of the snap projection is greater than the width of the connection portion of the snap projection and the second side.

[0026] Optionally, along the direction from the end of the snap projection connected to the second side to the end thereof away from the second side, the width of the snap projection gradually increases.

[0027] Optionally, the first clamping portion has an L-shaped structure, and the second clamping portion has a "7"-shaped structure.

[0028] Optionally, the first clamping portion is provided at the first end of the first side of the outer electrode corresponding to the first opening, the second clamping portion is provided at the second end of the second side of the outer electrode corresponding to the first opening, and the first end and the second end are respectively located at both ends of the outer electrode.

[0029] Optionally, at least two of the first openings are provided along the circumference of the outer electrode.

[0030] Optionally, at least two of the snap structures are formed at the first opening.

[0031] Optionally, the insulating member is provided with a second opening penetrating through both ends thereof, so that the insulating member forms a circumferentially non-closed structure.

[0032] Optionally, the insulating member is a non-integral structure along its circumferential direction.

[0033] Optionally, the insulating member includes at least one first insulating portion, and the first insulating portion is provided with a first through hole penetrating through its thickness to form a first discharge port, and the first discharge port corresponds to a second discharge port on the outer electrode.

[0034] Optionally, the insulating member includes at least one group of second insulating portions, and all the second insulating portions in the same group enclose to form a first discharge port, and the first discharge port corresponds to a second discharge port on the outer electrode.

[0035] An electrode pair, applied to a shock wave balloon catheter, includes:

[0036] An inner electrode, configured to be disposed on the outer peripheral portion of the inner tube of the shock wave balloon catheter;

[0037] An insulating member, disposed on the outer peripheral portion of the inner electrode, and the insulating member is a non-integral structure along its circumferential direction;

[0038] An outer electrode, disposed on the outer peripheral portion of the insulating member, and the outer electrode is provided with a first opening, so that the outer electrode forms a circumferentially non-closed structure.

[0039] An electrode pair, applied to a shock wave balloon catheter, includes:

[0040] An inner electrode, configured to be disposed on the outer peripheral portion of the inner tube of the shock wave balloon catheter;

[0041] An insulating member, disposed on the outer peripheral portion of the inner electrode, and the insulating member is a non-integral structure along its circumferential direction;

[0042] An outer electrode is provided on the outer peripheral portion of the insulating member.

[0043] A shock wave balloon catheter, comprising:

[0044] An inner tube;

[0045] A balloon, sleeved on the outer peripheral portion of the inner tube;

[0046] Any one of the above electrode pairs is provided inside the balloon, and the inner electrode of the electrode pair is provided on the outer peripheral portion of the inner tube.

[0047] An electrode pair provided by the present utility model has the following beneficial effects:

[0048] During assembly, the inner electrode is arranged on the outer peripheral portion of the inner tube of the shock wave balloon catheter, and then, the insulating member and the outer electrode are sequentially arranged from the inside to the outside, so as to form an electrode pair with a three-layer stacked structure. Since the outer electrode is provided with a first opening to make the outer electrode form a circumferentially non-closed structure, therefore, when the outer electrode is arranged on the outer peripheral portion of the insulating member, one situation is that: due to the existence of the first opening, the outer electrode can be expanded from the first opening, making the radial dimension of the outer electrode larger, so as to realize the installation of the outer electrode and the insulating member, that is, an outer electrode with a smaller inner and outer diameter can be adopted, and during assembly, the outer electrode is sleeved on the outer peripheral portion of the insulating member by expanding the outer electrode from the first opening, and after the outer electrode is assembled in place, by using the elastic restoring force of the outer electrode itself, the outer electrode retracts to its original size, making the outer electrode closely attached to the outer peripheral portion of the insulating member, realizing the gapless fit between the outer electrode and the insulating member. Another situation is that: due to the existence of the first opening, an outer electrode with a larger inner and outer diameter can be adopted, and during assembly, by increasing the process step of pressing and holding, the radial dimension of the outer electrode becomes smaller and closely adheres to the outer peripheral portion of the insulating member. During this process, the first opening becomes smaller to absorb the deformation amount of the reduction of the radial dimension of the outer electrode, so as to realize the gapless fit between the outer electrode and the insulating member. Since the outer electrode and the insulating member are in gapless fit, compared with the related art, it is equivalent to canceling the gap between the outer electrode and the insulating member. Therefore, the overall radial dimension of the electrode pair can be relatively reduced. When the electrode pair is applied to a shock wave balloon catheter, it is beneficial to reduce the outer diameter of the shock wave balloon catheter at the corresponding electrode pair, thereby enhancing the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels, reducing the surgical risk, increasing the surgical success rate, and ensuring the treatment effect.

[0049] Furthermore, since a buckle structure is formed at the first opening, the parts on both sides of the first opening of the outer electrode are clamped together. In this way, after the outer electrode is sleeved on the outer peripheral portion of the insulating member, during the use of the electrode pair, the buckle structure can be used to prevent the outer electrode from falling off, thereby enhancing the reliability and stability of the fixation of the outer electrode, the insulating member and the inner electrode, and improving the reliability of the electrode pair.

[0050] In addition, it can be understood that the related art realizes the assembly of the outer electrode and the insulating member by means of clearance fit, which greatly increases the precision requirements for the inner and outer diameters of the outer electrode, increases the processing difficulty and cost. After adopting the outer electrode with the structure described above, only the wall thickness of the outer electrode needs to be controlled, and the requirements for the inner and outer diameters of the outer electrode are greatly reduced, that is, the dimensional precision requirements for the outer electrode are reduced, thereby reducing the processing difficulty and cost.

[0051] Another pair of electrodes provided by the present utility model has the following beneficial effects:

[0052] Since the insulating member is a non-integral structure along its circumferential direction, that is, the insulating member includes at least two split structural members and is a non-integral sleeve structure in the circumferential direction. When installing the insulating member, each split structural member can be independently installed. In this way, a clearance-free fit can be achieved between the insulating member and the inner electrode. In addition, since the outer electrode is provided with a first opening to form a circumferentially non-closed structure, when the outer electrode is disposed on the outer peripheral portion of the insulating member, a clearance-free fit can be achieved between the outer electrode and the insulating member. It can be seen that, compared with the related art, this pair of electrodes is equivalent to eliminating the clearance between the insulating member and the inner electrode and the clearance between the outer electrode and the insulating member. Therefore, the overall radial dimension of the pair of electrodes can be relatively reduced. When this pair of electrodes is applied to a shock wave balloon catheter, it is beneficial to reduce the outer diameter of the shock wave balloon catheter corresponding to the pair of electrodes, thereby enhancing the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels, reducing the surgical risk, increasing the surgical success rate, and ensuring the treatment effect.

[0053] Another pair of electrodes provided by the present utility model has the following beneficial effects:

[0054] Since the insulating member is a non-integral structure along its circumferential direction, that is, the insulating member includes at least two split structural members and is a non-integral sleeve structure in the circumferential direction. When installing the insulating member, each split structural member can be independently installed. In this way, a clearance-free fit can be achieved between the insulating member and the inner electrode. Compared with the related art, it is equivalent to eliminating the clearance between the insulating member and the inner electrode. Therefore, the overall radial dimension of the pair of electrodes can be relatively reduced. When this pair of electrodes is applied to a shock wave balloon catheter, it is beneficial to reduce the outer diameter of the shock wave balloon catheter corresponding to the pair of electrodes, thereby enhancing the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels, reducing the surgical risk, increasing the surgical success rate, and ensuring the treatment effect.

[0055] A shock wave balloon catheter, comprising:

[0056] An inner tube;

[0057] A balloon sleeved on the outer peripheral portion of the inner tube;

[0058] Any one of the above electrode pairs is disposed inside the balloon, and the inner electrode of the electrode pair is disposed on the outer peripheral portion of the inner tube.

[0059] The shock wave balloon catheter provided by the present utility model includes the above electrode pair and has the above beneficial effects.

[0060] A shock wave balloon catheter system includes the above shock wave balloon catheter.

[0061] The shock wave balloon catheter system provided by the present utility model includes the above shock wave balloon catheter and has the above beneficial effects. Description of the Drawings

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the provided drawings.

[0063] Figure 1 It is a schematic structural diagram when the electrode pair provided by the specific embodiment of the present utility model is installed on the inner tube of the shock wave balloon catheter;

[0064] Figure 2 For Figure 1 a schematic structural diagram of the inner and outer electrodes;

[0065] Figure 3 It is a schematic structural diagram of the second structure of the outer electrode;

[0066] Figure 4 It is a schematic structural diagram of the third structure of the outer electrode;

[0067] Figure 5 For Figure 1 a schematic structural diagram of the insulating member in;

[0068] Figure 6 It is a schematic structural diagram of the shock wave balloon catheter system provided by the specific embodiment of the present utility model.

[0069] Reference Signs:

[0070] 1 - inner electrode; 2 - insulating member; 21 - second opening; 22 - first through hole; 3 - outer electrode; 31 - first opening; 32 - snap structure; 321 - card slot; 322 - snap projection; 3221 - connecting portion; 3222 - snap portion; 33 - second through hole; 10 - inner tube; 20 - balloon; 30 - electrode pair; 40 - outer tube; 50 - main unit; 60 - wire. Detailed Embodiments

[0071] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0072] The core of the present invention is to provide an electrode pair with a small outer diameter size and a low requirement for the dimensional accuracy of the outer electrode. Another core of the present invention is to provide a shock wave balloon catheter and a shock wave balloon catheter system including the above electrode pair, and the size of the electrode pair is small.

[0073] Please refer to Figure 1 , an embodiment of the present invention provides an electrode pair applied to a shock wave balloon catheter. The electrode pair includes an inner electrode 1, an insulating member 2, and an outer electrode 3. The inner electrode 1 is used to be disposed on the outer peripheral portion of the inner tube 10 of the shock wave balloon catheter; the insulating member 2 is disposed on the outer peripheral portion of the inner electrode 1; the outer electrode 3 is disposed on the outer peripheral portion of the insulating member 2. The outer electrode 3 is provided with a first opening 31 to make the outer electrode 3 form a circumferentially non-closed structure, and a buckle structure 32 is formed at the first opening 31 to make both sides of the first opening 31 snap together.

[0074] During assembly, the inner electrode 1 is disposed on the outer peripheral portion of the inner tube 10 of the shock wave balloon catheter. Then, the insulating member 2 and the outer electrode 3 are sleeved in sequence from the inside to the outside, thereby forming an electrode pair with a three-layer stacked structure. Since the outer electrode 3 is provided with a first opening 31 to form a circumferentially non-closed structure for the outer electrode 3, when the outer electrode 3 is sleeved on the outer peripheral portion of the insulating member 2, there are two cases: In one case, due to the existence of the first opening 31, the outer electrode 3 can be expanded from the first opening 31, increasing the radial dimension of the outer electrode 3, thereby realizing the installation of the outer electrode 3 and the insulating member 2. That is, an outer electrode 3 with a smaller inner and outer diameter can be used. During assembly, the outer electrode 3 is sleeved on the outer peripheral portion of the insulating member 2 by expanding the outer electrode 3 from the first opening 31. After the outer electrode 3 is assembled in place, the elastic restoring force of the outer electrode 3 itself causes the outer electrode 3 to retract to its original size, making the outer electrode 3 closely adhere to the outer peripheral portion of the insulating member 2, realizing a gapless fit between the outer electrode 3 and the insulating member 2. In another case, due to the existence of the first opening 31, an outer electrode 3 with a larger inner and outer diameter can be used. During assembly, by adding a pressing process step, the radial dimension of the outer electrode 3 is reduced to closely adhere to the outer peripheral portion of the insulating member 2. During this process, the first opening 31 becomes smaller to absorb the deformation amount of the reduction in the radial dimension of the outer electrode 3, thereby realizing a gapless fit between the outer electrode 3 and the insulating member 2. Since the outer electrode 3 and the insulating member 2 have a gapless fit, compared with the related art, it is equivalent to eliminating the gap between the outer electrode 3 and the insulating member 2. Therefore, the overall radial dimension of the electrode pair can be relatively reduced. When the electrode pair is applied to the shock wave balloon catheter, it is beneficial to reduce the outer diameter of the shock wave balloon catheter at the corresponding electrode pair, thereby enhancing the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels, reducing the surgical risk, increasing the surgical success rate, and ensuring the treatment effect.

[0075] Furthermore, since a snap structure 32 is formed at the first opening 31 of the outer electrode 3 to clamp the portions on both sides of the first opening 31 of the outer electrode 3 together, in this way, after the outer electrode 3 is sleeved on the outer peripheral portion of the insulating member 2, during the use of the electrode pair, the snap structure 32 can be used to prevent the outer electrode 3 from falling off, thereby enhancing the reliability and stability of the fixation of the outer electrode 3, the insulating member 2, and the inner electrode 1, and enhancing the reliability of the electrode pair.

[0076] In addition, it can be understood that the related art uses an outer electrode 3 and an insulating member 2 with a clearance fit to realize the assembly of the two, which greatly increases the precision requirements for the inner and outer diameters of the outer electrode 3, increasing the processing difficulty and processing cost. After using the outer electrode 3 with the structure described above, only the wall thickness of the outer electrode 3 needs to be controlled, and the requirements for the inner and outer diameters of the outer electrode 3 are greatly reduced, that is, the requirements for the dimensional accuracy of the outer electrode 3 are reduced, thereby reducing the processing difficulty and processing cost.

[0077] It should be noted that the specific material of the outer electrode 3 in the embodiments of the present utility model is not limited. For example, the outer electrode 3 is a metal outer electrode 3. In some embodiments, the outer electrode 3 is a stainless steel elastic metal outer electrode 3, which can be assembled by being expanded from the first opening 31 during assembly. After the assembly is in place, it retracts to its original size by the elasticity of the outer electrode 3 itself. In other embodiments, the outer electrode 3 is a plastic metal outer electrode 3, and the assembly of the outer electrode 3 is achieved by adding a process step of pressing and holding during assembly.

[0078] It should be noted that the specific structure of the buckle structure 32 in this embodiment is not limited, as long as it can make the two sides of the first opening 31 of the outer electrode 3 be clamped together.

[0079] In some embodiments, the buckle structure 32 includes a first clamping portion and a second clamping portion. The first clamping portion and the second clamping portion are respectively arranged on both sides of the outer electrode 3 corresponding to the first opening 31. The first clamping portion and the second clamping portion are buckled together, and there is a gap between them. That is to say, in this embodiment, the two sides of the outer electrode 3 corresponding to the first opening 31 are clamped together by buckling the first clamping portion and the second clamping portion arranged on both sides of the outer electrode 3 corresponding to the first opening 31. There is a gap between the first clamping portion and the second clamping portion, ensuring the non-closed state of the circumferential direction of the outer electrode 3. During the assembly process, the gap between the first clamping portion and the second clamping portion is used to absorb the deformation of the outer electrode 3 to ensure the smooth assembly of the outer electrode 3; at the same time, after the outer electrode 3 is assembled and restored to its deformed state, the buckling relationship between the first clamping portion and the second clamping portion can be used to ensure that the two sides of the outer electrode 3 corresponding to the first opening 31 are connected together.

[0080] Of course, in some other embodiments, the solution may also be as follows: The snap structure 32 includes a third latching portion, a fourth latching portion, and a latching member. The third latching portion and the fourth latching portion are respectively disposed on both sides of the outer electrode 3 corresponding to the first opening 31. The latching member includes a fifth latching portion and a sixth latching portion. The fifth latching portion is latched with the third latching portion, and the sixth latching portion is latched with the fourth latching portion. The latching member is detachably connected to the outer electrode 3 or the latching member is connected to the insulating member 2. That is to say, in this embodiment, by providing the third latching portion and the fourth latching portion on the outer electrode 3 and providing a latching member independent of the outer electrode 3, and using the fifth latching portion and the sixth latching portion of the latching member to respectively latch with the third latching portion and the fourth latching portion, the connection on both sides of the outer electrode 3 corresponding to the first opening 31 is realized. It can be understood that during assembly, after the outer electrode 3 is assembled in place, the fifth latching portion and the sixth latching portion of the latching member can be respectively aligned and latched with the third latching portion and the fourth latching portion. The latching member can be detachably connected to the outer electrode 3 by the fifth latching portion and the sixth latching portion respectively latching with the third latching portion and the fourth latching portion. The latching member can also be connected to the insulating member 2 by an adhesive or a thermal bonding process or the like when the fifth latching portion and the sixth latching portion are respectively latched with the third latching portion and the fourth latching portion, so as to realize the fixation of the latching member.

[0081] It should be noted that the specific structures of the first latching portion, the second latching portion, the third latching portion, the fourth latching portion, the fifth latching portion, and the sixth latching portion are not limited in the above embodiments, as long as the first latching portion and the second latching portion can be latched with each other, and the fifth latching portion and the sixth latching portion can respectively latch with the third latching portion and the fourth latching portion.

[0082] Please refer to Figure 1, in some embodiments, one of the first engaging portion and the second engaging portion is a slot 321, and the other is a snap projection 322. The slot 321 is provided on the first side of the outer electrode 3 corresponding to the first opening 31; the snap projection 322 protrudes from the second side of the outer electrode 3 corresponding to the first opening 31. It can be understood that the snap projection 322 is located within the slot 321, matches the shape of the slot 321, and has a gap therebetween. Additionally, the first side and the second side are two opposite sidewalls of the first opening 31, and for the convenience of description, they are divided into the first side and the second side herein. The snap projection 322 is located within the slot 321, and the matching shape between the two makes it impossible for the snap projection 322 to escape from the slot 321; there is a gap between the snap projection 322 and the slot 321, so that the outer electrode 3 remains in a non-closed circumferential state, and during the assembly process of the outer electrode 3, the deformation amount of the outer electrode 3 is absorbed, avoiding interference between the snap projection 322 and the slot 321 and affecting the assembly of the outer electrode 3. Exemplarily, both the first engaging portion and the second engaging portion can include both the slot 321 and the snap projection 322. In this case, the first engaging portion and the second engaging portion are engaged with each other, and the slot 321 of one cooperates with the snap projection 322 of the other.

[0083] Furthermore, in this embodiment, the specific shape of the snap projection 322 is not limited, as long as the snap projection 322 can match the slot 321 to prevent the snap projection 322 from escaping from the slot 321.

[0084] Please refer to Figure 2 and Figure 3 , in some embodiments, the snap projection 322 includes a connecting portion 3221 and a latching portion 3222. One end of the connecting portion 3221 is connected to the second side of the first opening 31 of the outer electrode 3 and extends circumferentially along the outer electrode 3 in a direction away from the second side; the latching portion 3222 is connected to the end of the connecting portion 3221 away from the second side of the first opening 31, and the latching portion 3222 protrudes at least from one side of the connecting portion 3221. That is to say, in this embodiment, the connecting portion 3221 serves as a transitional connection between the latching portion 3222 and the second side of the first opening 31. It can be understood that the shape of the slot 321 matches that of the snap projection 322. The slot 321 includes a connecting groove that cooperates with the connecting portion 3221 and a latching groove that cooperates with the latching portion 3222. Since the latching portion 3222 protrudes at least from one side of the connecting portion 3221, the size of the latching groove is larger than that of the connecting groove, so that the latching portion 3222 can be located within the latching groove, and at the same time, the latching portion 3222 cannot pass through the connecting groove, thereby preventing the snap projection 322 from escaping from the slot 321.

[0085] It should be noted that the specific shape of the clamping protrusion 322 is not limited in this embodiment, as long as the above limitations of the connecting portion 3221 and the clamping portion 3222 can be satisfied.

[0086] In some embodiments, the clamping portion 3222 and the connecting portion 3221 form at least one of a T-shaped structure (as shown in Figure 2 , Figure 3 ) and an L-shaped structure. That is to say, in this embodiment, the clamping portion 3222 protrudes vertically from one or both sides of the connecting portion 3221, so that the clamping portion 3222 and the connecting portion 3221 form a clamping protrusion 322 in an L shape or a T shape. It should be noted that the T-shaped structure and the L-shaped structure here are approximate similar shapes when looking at the overall clamping protrusion 322, and the specific detailed shapes of the clamping portion 3222 and the connecting portion 3221 that form the T-shaped structure or the L-shaped structure are not limited. For example, when the clamping portion 3222 and the connecting portion 3221 form a T-shaped structure, the clamping portion 3222 may not be a strictly straight structure, but generally looks like a straight structure, but the outer contour of the clamping portion 3222 may have an arc segment, etc.

[0087] Furthermore, in some embodiments, the clamping portion 3222 is in a straight shape (as shown in Figure 2 ), circular (as shown in Figure 3 ) or oval. It can be understood that in this case, the clamping portion 3222 can form a generally T-shaped structure or an L-shaped structure with the connecting portion 3221, except that the specific shape of the clamping portion 3222 is different. The above structures can prevent the clamping protrusion 322 from disengaging from the card slot 321.

[0088] In addition, in some embodiments, along the direction from one end of the clamping protrusion 322 connected to the second side of the first opening 31 of the outer electrode 3 to the end far from the second side, at least a part of the width of the clamping protrusion 322 is greater than the width of the connection between the clamping protrusion 322 and the second side. That is to say, in this embodiment, as long as there is a part of the structure of the clamping protrusion 322 whose width is greater than the width of the connection between the clamping protrusion 322 and the second side, the specific shape of the clamping protrusion 322 is not limited, and the shape of the clamping protrusion 322 can be made more diverse. Please refer to Figure 4, in some embodiments, in the direction from the end of the snap projection 322 connected to the second side of the first opening 31 to the end away from the second side, the width dimension of the snap projection 322 gradually increases. That is, the snap projection 322 has a structure with a uniformly changing width dimension. Since the slot 321 matches the shape of the snap projection 322, the width dimension of the slot 321 gradually decreases in the direction from the end connected to the first side of the first opening 31 to the end away from the first side. It can be seen that the size at the notch of the slot 321 near the second side of the first opening 31 is the smallest, so the snap projection 322 can be prevented from disengaging from the slot 321. It should be noted that the specific shape of the snap projection 322 is not limited in this embodiment. For example, in some embodiments, the snap projection 322 is an inverted trapezoidal structure, or a dovetail structure. Of course, it can also be a semi-circular structure, etc.

[0089] In addition, considering other implementation manners of the first positioning portion and the second positioning portion, in some embodiments, the first positioning portion is an L-shaped structure, and the second positioning portion is a "7"-shaped structure. It can be understood that the L-shaped structure and the "7"-shaped structure can be buckled together to realize the connection of the outer electrode 3 corresponding to both sides of the first opening 31. That is to say, convex structures protruding from the inner side wall of the first opening 31 are provided on both sides of the outer electrode 3 corresponding to the first opening 31, and the convex structures on both sides of the first opening 31 can just be buckled together.

[0090] It should be noted that the specific setting positions of the first positioning portion and the second positioning portion are not limited in the above embodiments. The first positioning portion and the second positioning portion can be respectively located at the middle position, the end portion, or between the middle position and the end portion on both sides of the outer electrode 3 corresponding to the first opening 31.

[0091] In some embodiments, when the first positioning portion is an L-shaped structure and the second positioning portion is a "7"-shaped structure, the first positioning portion is provided at the first end of the outer electrode 3 corresponding to the first side of the first opening 31, and the second positioning portion is provided at the second end of the outer electrode 3 corresponding to the second side of the first opening 31. The first end and the second end are respectively located at both ends of the outer electrode 3. That is to say, in this embodiment, the connection of the outer electrode 3 corresponding to both sides of the first opening 31 is realized by buckling the L-shaped structure and the "7"-shaped structure at both ends of the outer electrode 3 corresponding to the first opening 31. In this case, the structure is simple and convenient to implement. However, when the length between both ends of the outer electrode 3 is relatively long, the horizontal right-angled sides of the L-shaped structure and the "7"-shaped structure are relatively long.

[0092] Of course, in other embodiments, when the first positioning portion is an L-shaped structure and the second positioning portion is a "7"-shaped structure, the first positioning portion and the second positioning portion can also be respectively located at the middle position on both side walls of the first opening 31 or between the middle position and the end portion.

[0093] In addition, in some other embodiments, the first card slot portion may include a first groove portion and a first protrusion portion, and the second card slot portion may include a second groove portion and a second protrusion portion. The second protrusion portion is engaged with the first groove portion, and the second groove portion is engaged with the first protrusion portion, so as to realize the connection on both sides of the outer electrode 3 corresponding to the first opening 31. Those skilled in the art can set the specific structural forms of the first card slot portion and the second card slot portion according to actual needs.

[0094] In addition, the above embodiments do not limit the specific number of the first openings 31. The first opening 31 may be one or at least two. There are gaps between the first opening 31 and the snap structures 32 thereon. If these gaps are adjacent to the inner electrode, discharge may occur. Further, when it is necessary to control the discharge at the discharge port of the electrode in the common stacking area of the inner electrode-insulator-outer electrode, in order to prevent discharge at the position of the first opening 31 and the snap structures 32 thereon, the first opening 31 and the snap structures 32 thereon are both arranged at a certain distance from the inner electrode, that is, the first opening 31 and the snap structures 32 thereon do not overlap with the inner electrode 1. In some cases where multi-point discharge is required, the first opening 31 and the snap structures 32 thereon may be stacked with the inner electrode 1.

[0095] Please refer to Figure 4 , in some embodiments, along the circumferential direction of the outer electrode 3, at least two first openings 31 are provided. That is, the first openings 31 are arranged at intervals along the circumferential direction of the outer electrode 3. It can be understood that each first opening 31 has the snap structure 32 described above. That is, the outer electrode 3 is formed by enclosing at least two arc-shaped electrode members, and there is a gap between any two adjacent arc-shaped electrode members to form the first opening 31, and any two adjacent arc-shaped electrode members are connected together by the snap structure 32. In this structural form, since the number of the first openings 31 is at least two, the space for absorbing the deformation amount of the outer electrode 3 is relatively large, so that the deformation amount of the outer electrode 3 during installation is relatively large, which is convenient for installation. Further, for the convenience of installation, in some embodiments, all the first openings 31 are evenly distributed along the circumferential direction of the outer electrode 3.

[0096] In addition, the above embodiments do not limit the number of the snap structures 32 at the first opening 31. As Figure 2 and Figure 3 shown, one snap structure 32 may be formed at the first opening 31, and the two sides of the outer electrode 3 at the first opening 31 can be connected together. As Figure 4 shown, more than two snap structures 32 (the snap structure 32 includes a card slot 321 and a snap protrusion 322) may also be formed at the first opening 31. Among them Figure 4More than two snap structures 32 are arranged axially. In other embodiments, more than two snap structures 32 may also be arranged circumferentially, or in a combination of axial and circumferential arrangements.

[0097] In some embodiments, at least two snap structures 32 are formed at the first opening 31. That is, both sides of the first opening 31 of the outer electrode 3 are connected together by more than two snap structures 32, which can make the connection between both sides of the first opening 31 of the outer electrode 3 firmer and more reliable, avoid the detachment of the outer electrode 3, and further improve the reliability of the electrode pair.

[0098] In addition, it should be noted that the specific formation method of the snap structure 32 in the embodiments of the present invention is not limited, as long as the snap structure 32 can be formed at the first opening 31. For example, in some embodiments, the outer electrode 3 is integrally formed, and the first opening 31 and the snap structure 32 are formed by cutting a pipe.

[0099] In addition, the setting method of the first opening 31 in the embodiments of the present invention is not limited. In some embodiments, the extending direction of the first opening 31 is parallel to the center line of the outer electrode 3, which is convenient for processing. In other embodiments, there is an included angle between the extending direction of the first opening 31 and the center line of the outer electrode 3, that is, the first opening 31 is inclined with respect to the center line of the outer electrode 3. Of course, the first opening 31 may also be arranged along the outer peripheral surface of the outer electrode 3 to form an arc-shaped first opening 31.

[0100] In addition, in the related art, there is a clearance fit between the insulating member 2 and the inner electrode 1, which requires a high dimensional accuracy of the insulating member 2. Moreover, due to the clearance between the insulating member 2 and the inner electrode 1, the overall outer diameter at the electrode pair is too large, making the electrode pair the position with the largest outer diameter of the entire shock wave balloon catheter, thus weakening the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels and affecting the treatment effect.

[0101] In order to reduce the requirement for the dimensional accuracy of the insulating member 2 and further reduce the radial dimension of the electrode pair, please refer to Figure 1 and Figure 5 . In some embodiments, the insulating member 2 is provided with a second opening 21 to make the insulating member 2 form a circumferentially non-closed structure.

[0102] During assembly, the inner electrode 1 is disposed on the outer peripheral portion of the inner tube 10 of the shock wave balloon catheter. Then, the insulating member 2 is sleeved on the outer peripheral portion of the inner electrode 1. Since the insulating member 2 is provided with a second opening 21 to form a circumferentially non-closed structure for the insulating member 2, when the insulating member 2 is sleeved on the outer peripheral portion of the inner electrode 1, due to the existence of the second opening 21, the insulating member 2 can be expanded from the second opening 21, increasing the radial dimension of the insulating member 2, thereby realizing the installation of the insulating member 2 and the inner electrode 1. That is, an insulating member 2 with a smaller inner and outer diameter can be used. During assembly, the insulating member 2 is sleeved on the outer peripheral portion of the inner electrode 1 by expanding the insulating member 2 from the second opening 21. After the insulating member 2 is assembled in place, the elastic restoring force of the insulating member 2 itself causes the insulating member 2 to retract to its original size, making the insulating member 2 closely adhere to the outer peripheral portion of the inner electrode 1, realizing a gapless fit between the insulating member 2 and the inner electrode 1. Compared with the related art, the gap between the insulating member 2 and the inner electrode 1 is eliminated. Therefore, the radial dimension of the electrode pair as a whole can be further reduced. When this electrode pair is applied to a shock wave balloon catheter, it is beneficial to further reduce the outer diameter of the shock wave balloon catheter at the corresponding electrode pair, thereby enhancing the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels, reducing the surgical risk, increasing the surgical success rate, and ensuring the treatment effect.

[0103] It should be noted that the specific shape and setting method of the second opening 21 in this embodiment are not limited. For example, please refer to Figure 5 , in some embodiments, the second opening 21 is a straight opening, and the extending direction of the second opening 21 is parallel to the center line of the insulating member 2, making the insulating member 2 a C-shaped structure. Of course, the second opening 21 can also be other shapes and setting methods, as long as the second opening 21 can make the insulating member 2 form a circumferentially non-closed structure.

[0104] In addition, in order to improve the reliability of the fixation of the insulating member 2, in some embodiments, a snap structure 32 may also be formed at the second opening 21 to snap the two sides of the second opening 21 together.

[0105] In addition, the specific material of the insulating member 2 in the embodiments of the present invention is not limited. In some embodiments, the insulating member 2 includes a plastic insulating member 2. For example, the insulating member 2 is an insulating member 2 made of polyimide material.

[0106] Furthermore, in order to improve the reliability of the electrode pair, in some embodiments, an adhesive is provided between the insulating member 2 and the inner electrode 1 and between the outer electrode 3 and the insulating member 2 respectively. That is, the insulating member 2 and the inner electrode 1 as well as the outer electrode 3 and the insulating member 2 are adhesively fixed respectively, making the fixation of the insulating member 2 with the inner electrode 1 and the outer electrode 3 more reliable.

[0107] Please refer to Figures 1 - 5, it can be understood that in each of the above embodiments, during operation, in order to enable the inner electrode 1 and the outer electrode 3 to discharge, the insulating member 2 is provided with a first through hole 22 penetrating its wall thickness, and the outer electrode 3 is provided with a second through hole 33 penetrating its wall thickness. The inner electrode 1 is aligned with the first through hole 22, and the first through hole 22 and the second through hole 33 are aligned, so that the inner electrode 1 is exposed at the first through hole 22 and the second through hole 33. When the electrode pair is applied to a shock wave balloon catheter, the first through hole 22 and the second through hole 22 serve as discharge ports, enabling the inner electrode 1 and the outer electrode 3 to discharge. The arc breaks down the contrast agent between the inner electrode 1 and the outer electrode 3, causing it to vaporize and expand to generate a shock wave. It can be understood that the distance between the inner electrode 1 and the outer electrode 3 affects the magnitude of the shock wave intensity during discharge. Therefore, the shock wave intensity can be adjusted by adjusting the wall thickness of the insulating member 2 and the opening sizes of the first through hole 22 and the second through hole 33.

[0108] It should be noted that the specific number of the first through hole 22 and the second through hole 33 is not limited in this embodiment. It can be understood that the number of the first through hole 22 and the second through hole 33 is the same, and the two are in one-to-one correspondence in terms of position. In some embodiments, the number of the inner electrodes 1 is two, and the two inner electrodes 1 are arranged at 180 degrees. The number of the first through holes 22 and the second through holes 33 is both two, and the two first through holes 22 are arranged at 180 degrees, and the two second through holes 33 are arranged at 180 degrees. That is to say, two discharge points are formed in this embodiment, which is convenient for circuit layout on the one hand, and can make the circumferential sound pressure distribution uniform on the other hand, resulting in good treatment effect. When the number of the first through hole 22 and the second through hole 33 is one respectively, since the release of the sound pressure is only 180°, the treatment effect will be affected. When the number of the first through hole 22 and the second through hole 33 is more than three respectively, it will affect the circuit design on the one hand, and on the other hand, since the distance between the inner electrodes 1 is reduced, it will cause discharge between the inner electrodes 1.

[0109] Furthermore, it can be understood that since the function of the insulating member 2 is to isolate the inner electrode 1 and the outer electrode 3, enabling discharge to occur only at the first through hole 22 and the second through hole 33, the size of the insulating member 2 should be selected to be able to completely cover the inner electrode 1, and the length dimension of the insulating member 2 also needs to be greater than the length dimensions of the inner electrode 1 and the outer electrode 3 respectively.

[0110] In addition, in order to further reduce the radial size of the electrode pair, in some embodiments, the insulating member 2 is a non-integral structure along its circumferential direction. That is to say, in this embodiment, while improving the outer electrode 3, the insulating member 2 is also improved to make the insulating member 2 a non-integral structure along its circumferential direction. That is, the insulating member 2 includes at least two split structural members, which are non-integral sleeve-shaped structures in the circumferential direction. When installing the insulating member 2, each split structural member can be installed independently. In this way, there can be a gapless fit between the insulating member 2 and the inner electrode 1. In addition, since the outer electrode 3 is provided with a first opening 31 to make the outer electrode 3 have a circumferentially non-closed structure, when the outer electrode 3 is arranged on the outer peripheral part of the insulating member 2, a gapless fit between the outer electrode 3 and the insulating member 2 can be achieved. It can be seen that compared with the related art, this electrode pair is equivalent to eliminating the gap between the insulating member 2 and the inner electrode 1 and the gap between the outer electrode 3 and the insulating member 2. Therefore, the overall radial size of the electrode pair can be relatively reduced. When this electrode pair is applied to a shock wave balloon catheter, it is beneficial to reduce the outer diameter of the shock wave balloon catheter at the corresponding electrode pair, thereby improving the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels, reducing the surgical risk, increasing the surgical success rate, and ensuring the treatment effect.

[0111] In addition, the specific structure of the insulating member 2 is not limited in this embodiment. The insulating member 2 at least includes an insulating part with a discharge port, and the discharge port of the insulating part corresponds to the discharge port of the outer electrode 3 to realize the discharge between the inner electrode 1 and the outer electrode 3. In addition, in order to facilitate the symmetry of the structure during installation to facilitate the installation of the outer electrode 3, the insulating member 2 may also include an insulating part without a discharge port. Further, for the convenience of installation, in some embodiments, the insulating member 2 includes at least two split structural members, and all the structural members are evenly distributed along the circumferential direction so as to form uniform support points for the insulating member 2 to support the outer electrode 3 after the outer electrode 3 is installed.

[0112] Furthermore, considering the specific formation method of the discharge port of the insulating member 2, in some embodiments, the insulating member 2 includes at least one first insulating part, and the first insulating part is provided with a first through hole 22 penetrating its wall thickness to form a first discharge port, and the first discharge port corresponds to the second discharge port on the outer electrode 3. That is to say, in this embodiment, a first through hole 22 penetrating the wall thickness of the first insulating part is directly provided in the first insulating part to form a first discharge port, and this solution is convenient for assembly.

[0113] Even further, in some embodiments, the insulating member 2 includes two first insulating parts, and these two first insulating parts may not be connected. The two first insulating parts are respectively provided with a first through hole 22 penetrating their wall thicknesses to form a first discharge port, and the first discharge port corresponds to the second discharge port on the outer electrode 3. Such as Figure 2As shown in the figure, the outer electrode is provided with two second through holes 33, and first insulating portions are respectively arranged on two opposite sides thereof. The first through hole 22 on the first insulating portion and the corresponding second through hole 33 form a discharge port. In this embodiment, by directly arranging the first through hole 22 penetrating the wall thickness of the first insulating portion on the first insulating portion, two first discharge ports are formed. This solution is convenient for assembly and can also improve the discharge efficiency.

[0114] Of course, in some other embodiments, the solution can also be like this: the insulating member 2 includes at least one group of second insulating portions, and all the second insulating portions in the same group enclose to form a first discharge port, and the first discharge port corresponds to the second discharge port on the outer electrode 3. This solution can avoid directly opening a through hole penetrating its wall thickness on the second insulating portion.

[0115] In addition to the above electrode pair, the present utility model also provides an electrode pair with another structural form, which is applied to a shock wave balloon catheter and includes an inner electrode 1, an insulating member 2, and an outer electrode 3. The inner electrode 1 is used to be arranged on the outer peripheral portion of the inner tube 10 of the shock wave balloon catheter; the insulating member 2 is arranged on the outer peripheral portion of the inner electrode 1, and the insulating member 2 is a non-integral structure along its circumferential direction; the outer electrode 3 is arranged on the outer peripheral portion of the insulating member 2, and the outer electrode 3 is provided with a first opening 31 to make the outer electrode 3 form a circumferentially non-closed structure.

[0116] That is to say, in this embodiment, by making the insulating member 2 a non-integral structure along its circumferential direction, the insulating member 2 includes at least two split structural members, that is, the insulating member 2 is a non-integral sleeve-like structure in the circumferential direction. When installing the insulating member 2, each split structural member can be independently installed. In this way, a gapless fit can be achieved between the insulating member 2 and the inner electrode 1. In addition, since the outer electrode 3 is provided with a first opening 31 to make the outer electrode 3 form a circumferentially non-closed structure, when the outer electrode 3 is arranged on the outer peripheral portion of the insulating member 2, a gapless fit can be achieved between the outer electrode 3 and the insulating member 2. It can be seen from this that compared with the related art, this electrode pair is equivalent to eliminating the gap between the insulating member 2 and the inner electrode 1 and the gap between the outer electrode 3 and the insulating member 2. Therefore, the overall radial dimension of the electrode pair can be relatively reduced. When this electrode pair is applied to a shock wave balloon catheter, it is beneficial to reduce the outer diameter of the shock wave balloon catheter at the corresponding electrode pair, thereby enhancing the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels, reducing the surgical risk, increasing the surgical success rate, and ensuring the treatment effect.

[0117] In addition to the above electrode pair, the present utility model also provides an electrode pair with another structural form, which is applied to a shock wave balloon catheter and includes an inner electrode 1, an insulating member 2, and an outer electrode 3. The inner electrode 1 is used to be arranged on the outer peripheral portion of the inner tube 10 of the shock wave balloon catheter; the insulating member 2 is arranged on the outer peripheral portion of the inner electrode 1, and the insulating member 2 is a non-integral structure along its circumferential direction; the outer electrode 3 is arranged on the outer peripheral portion of the insulating member 2.

[0118] That is to say, in this embodiment, by making the insulating member 2 a non-integral structure in its circumferential direction, the insulating member 2 includes at least two split structural members. That is, the insulating member 2 is a non-integral sleeve-like structure in the circumferential direction. When installing the insulating member 2, each split structural member can be independently installed. In this way, a gapless fit can be achieved between the insulating member 2 and the inner electrode 1. Compared with the related art, this electrode pair is equivalent to eliminating the gap between the insulating member 2 and the inner electrode 1. Therefore, the overall radial dimension of the electrode pair can be relatively reduced. When this electrode pair is applied to a shock wave balloon catheter, it is beneficial to reduce the outer diameter of the shock wave balloon catheter at the corresponding electrode pair, thereby enhancing the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels, reducing the surgical risk, increasing the surgical success rate, and ensuring the treatment effect.

[0119] In addition to the above electrode pair, the present utility model also provides a shock wave balloon catheter including the electrode pair disclosed in the above embodiment, as Figure 6 shown. This shock wave balloon catheter further includes an inner tube 10 and a balloon 20. The balloon 20 is sleeved on the outer periphery of the inner tube 10; the electrode pair 30 is disposed inside the balloon 20, and the inner electrode 1 of the electrode pair 30 is disposed on the outer periphery of the inner tube 10. For the structures of other parts of this shock wave balloon catheter, please refer to the related art and will not be elaborated herein.

[0120] The focus of this embodiment is: adopting the electrode pair 30 disclosed in any one of the above embodiments, which has the same beneficial effects as the above electrode pair 30. Since the electrode pair 30 disclosed above is adopted and the outer diameter dimension of the electrode pair 30 is small, the outer diameter of the shock wave balloon catheter at the corresponding electrode pair 30 is reduced. Therefore, the ability of the shock wave balloon catheter to pass through narrow and tortuous blood vessels is enhanced, the surgical risk is reduced, the surgical success rate is increased, and the treatment effect is ensured.

[0121] During operation, the shock wave balloon catheter follows a guide wire passing through the inner tube 10, enters the human body through the femoral artery or the radial artery and reaches the lesion site. After reaching the lesion site, a contrast agent is used to expand the balloon 20, and at the same time, a pulsed current is excited to cause the inner electrode 1 and the outer electrode 3 to discharge. The arc breaks through the contrast liquid between the inner electrode 1 and the outer electrode 3, causing it to vaporize and expand to generate shock waves. Such unfocused, circumferential and pulsed shock waves will not affect normal vascular soft tissues, but can efficiently and safely destroy the medial calcification and intimal calcification of blood vessels, improve the vascular compliance by introducing cracks into the calcified area, and achieve the purpose of treatment.

[0122] It should be noted that the specific material and structure of the balloon 20 in the embodiments of the present utility model are not specifically limited. In some embodiments, the balloon 20 is a semi-compliant balloon 20, which has a certain expansion ability and elasticity, and can produce a certain deformation, which can make the balloon 20 fit more closely to the calcified inner wall of the blood vessel, thereby improving the effect of treating calcification.

[0123] In addition, please refer to Figure 6 , in some embodiments, the shock wave balloon catheter further includes an outer tube 40. The outer tube 40 is sleeved outside the inner tube 10 and forms a cavity between the outer tube 40 and the inner tube 10. The proximal end of the balloon 20 is connected to the distal end of the outer tube 40, and the distal end of the balloon 20 is connected to the distal end of the inner tube 10, so that the inside of the balloon 20 communicates with the above-mentioned cavity, forming a relatively sealed area with only one channel to the outside world. In some embodiments, the balloon 20 is connected to the inner tube 10 and the outer tube 40 by heat melting respectively.

[0124] It should be noted that in the embodiments of the present utility model, the proximal end refers to the end of the shock wave balloon catheter close to the operator during interventional treatment, and the distal end refers to the end of the shock wave balloon catheter far from the operator during interventional treatment.

[0125] Further, in some embodiments, the inner cavity of the inner tube 10 serves as a guide wire channel for the guide wire to pass through. During operation, the shock wave balloon catheter follows the guide wire and enters the human body through the femoral artery or the radial artery and reaches the lesion site. The cavity between the inner tube 10 and the outer tube 40 can serve as a pressure charging and discharging channel for the balloon 20.

[0126] Please refer to Figure 6 , in addition to the above-mentioned shock wave balloon catheter, the present utility model also provides a shock wave balloon catheter system including the shock wave balloon catheter disclosed in the above embodiments. The shock wave balloon catheter system further includes a main unit 50. The wire 60 of the shock wave balloon catheter is connected to the main unit 50. For the structure of the main unit 50 and other parts of the shock wave balloon catheter system, please refer to the related art and will not be elaborated herein.

[0127] The focus of this embodiment is that the shock wave balloon catheter disclosed in the above embodiment has a small outer diameter, strong ability to pass through narrow and tortuous blood vessels, and good treatment effect.

[0128] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0129] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0130] The electrode pair, shock wave balloon catheter and shock wave balloon catheter system provided by the present utility model have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims

1. An electrode pair, characterized in that, Applied to a shock wave balloon catheter, including: An inner electrode (1) for being arranged on the outer peripheral part of the inner tube (10) of the shock wave balloon catheter; An insulating member (2) arranged on the outer peripheral part of the inner electrode (1); An outer electrode (3) arranged on the outer peripheral part of the insulating member (2). The outer electrode (3) is provided with a first opening (31) so that the outer electrode (3) forms a circumferentially non-closed structure. A snap structure (32) is formed at the first opening (31) so that both sides of the first opening (31) are snap-connected together.

2. The electrode pair according to claim 1, wherein The snap structure (32) includes: A first clamping part and a second clamping part, which are respectively arranged on both sides of the outer electrode (3) corresponding to the first opening (31). The first clamping part and the second clamping part are buckled together and there is a gap between them.

3. The electrode pair according to claim 1, characterized in that, The snap structure (32) includes: A third clamping part and a fourth clamping part, which are respectively arranged on both sides of the outer electrode (3) corresponding to the first opening (31); A snap member, including a fifth clamping part and a sixth clamping part. The fifth clamping part is buckled with the third clamping part, the sixth clamping part is buckled with the fourth clamping part, and the snap member is buckled and connected with the outer electrode (3) or the snap member is connected with the insulating member (2).

4. The electrode pair according to claim 2, wherein One of the first clamping part and the second clamping part is a clamping groove (321), and the other is a snap projection part (322). The clamping groove (321) is arranged on the first side of the outer electrode (3) corresponding to the first opening (31), and the snap projection part (322) protrudes from the second side of the outer electrode (3) corresponding to the first opening (31).

5. The electrode pair according to claim 4, characterized in that The snap projection part (322) includes: A connecting part (3221), one end of which is connected to the second side and extends along the circumferential direction of the outer electrode (3) away from the second side; A clamping part (3222), which is connected to the end of the connecting part (3221) away from the second side. The clamping part (3222) protrudes at least from one side of the connecting part (3221).

6. The electrode pair according to claim 5, characterized in that, The clamping part (3222) and the connecting part (3221) form at least one of a T-shaped structure and an L-shaped structure.

7. The electrode pair according to claim 6, characterized in that, The clamping part (3222) is in a shape of a straight line, a circle or an ellipse.

8. The electrode pair according to claim 4, characterized in that, Along the direction from the end of the snap projection part (322) connected to the second side to the end thereof away from the second side, at least a part of the width of the snap projection part (322) is greater than the width of the connection part of the snap projection part (322) and the second side.

9. The electrode pair according to claim 8, wherein, Along the direction from the end of the snap projection part (322) connected to the second side to the end thereof away from the second side, the width of the snap projection part (322) gradually increases.

10. The electrode pair according to claim 2, characterized in that, The first clamping part is in an L-shaped structure, and the second clamping part is in a "7”-shaped structure.

11. The electrode pair according to claim 10, characterized in that, The first clamping part is arranged at the first end of the first side of the outer electrode (3) corresponding to the first opening (31), and the second clamping part is arranged at the second end of the second side of the outer electrode (3) corresponding to the first opening (31). The first end and the second end are respectively located at both ends of the outer electrode (3).

12. The electrode pair according to any one of claims 1-11, characterized in that, At least two of the first openings (31) are provided along the circumference of the outer electrode (3).

13. The electrode pair according to any one of claims 1-11, characterized in that, At least two of the snap structures (32) are formed at the first openings (31).

14. The electrode pair according to any one of claims 1-11, characterized in that, The insulating member (2) is provided with a second opening (21) so that the insulating member (2) forms a circumferentially non-closed structure.

15. The electrode pair according to any one of claims 1-11, characterized in that, The insulating member (2) is a non-integral structure along its circumferential direction.

16. The electrode pair according to claim 15, wherein The insulating member (2) includes at least one first insulating portion, and the first insulating portion is provided with a first through hole penetrating its wall thickness to form a first discharge port, and the first discharge port corresponds to a second discharge port on the outer electrode (3); Alternatively, the insulating member (2) includes at least one group of second insulating portions, and all the second insulating portions in the same group enclose to form a first discharge port, and the first discharge port corresponds to a second discharge port on the outer electrode (3).

17. An electrode pair, characterized in that, Applied to a shock wave balloon catheter, comprising: An inner electrode (1) for being disposed on the outer peripheral portion of the inner tube (10) of the shock wave balloon catheter; An insulating member (2) disposed on the outer peripheral portion of the inner electrode (1), and the insulating member (2) is a non-integral structure along its circumferential direction; An outer electrode (3) disposed on the outer peripheral portion of the insulating member (2), and the outer electrode (3) is provided with a first opening (31) so that the outer electrode (3) forms a circumferentially non-closed structure.

18. An electrode pair, characterized in that, Applied to a shock wave balloon catheter, comprising: An inner electrode (1) for being disposed on the outer peripheral portion of the inner tube (10) of the shock wave balloon catheter; An insulating member (2) disposed on the outer peripheral portion of the inner electrode (1), and the insulating member (2) is a non-integral structure along its circumferential direction; An outer electrode (3) disposed on the outer peripheral portion of the insulating member (2).

19. A shock wave balloon catheter, characterized in that, Comprising: An inner tube (10); A balloon (20) sleeved on the outer peripheral portion of the inner tube (10); The electrode pair (30) according to any one of claims 1-18, disposed inside the balloon (20), and the inner electrode (1) of the electrode pair (30) is disposed on the outer peripheral portion of the inner tube (10).

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