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; an external electrode provided on the outer periphery of the insulator; the structure of at least one of the insulating member and the external electrode comprises: a body capable of generating elastic deformation; and the deformation quantity absorbing structure is arranged on the body and is used for absorbing the deformation quantity generated by the body in the radial direction when the body is stressed and enabling the body to restore to the original shape when the body is not stressed. The deformation quantity absorbing structure is used for absorbing the deformation quantity of the body, so that the body can generate elastic deformation to change the radial size, the radial size of the body is allowed to be increased under the action of external force in the mounting process so as to realize assembly, and the body can recover the deformation when the external force is removed after the assembly is completed. Gapless fit between the insulating parts and the inner electrodes and / or between the outer electrodes can be achieved, the radial size of the insulating parts and / or the outer electrodes is reduced, and the outer diameter size of the electrode pair is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to an electrode pair. Furthermore, this utility model also relates to a shockwave balloon catheter including the aforementioned electrode pair. Background Technology

[0002] In recent years, endovascular shock wave lithotripsy (IVL) has been frequently used in the treatment of vascular calcification lesions. IVL uses a shock wave balloon catheter to deliver unfocused, circular, 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 therapeutic goal.

[0003] In related technologies, the overall outer diameter of the electrode pair in the shockwave balloon catheter is too large, resulting in the largest outer diameter at the corresponding electrode pair position of the entire shockwave balloon catheter. This weakens the shockwave balloon catheter's ability to pass through narrow and tortuous blood vessels, affecting the treatment effect.

[0004] Therefore, how to reduce the outer diameter of the electrode pair is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an electrode pair with a small outer diameter.

[0006] Another objective of this invention is to provide a shockwave balloon catheter including the aforementioned electrode pair, wherein the electrode pair is small in size.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An electrode pair for use in a shockwave balloon catheter, comprising:

[0009] An inner electrode is provided on the outer periphery of the inner tube of the shock wave balloon catheter.

[0010] An insulating element is disposed on the outer periphery of the inner electrode;

[0011] The external electrode is disposed on the outer periphery of the insulating member;

[0012] The structure of at least one of the insulating element and the external electrode includes:

[0013] The body itself can undergo elastic deformation;

[0014] A deformation absorbing structure is provided on the body to absorb the radial deformation generated by the body when the body is subjected to force, and to enable the body to return to its original shape when the body is not subjected to force.

[0015] Optionally, the body is a ring-shaped component, and the deformation absorbing structure includes:

[0016] A first opening is provided on the body, and at least one end of the first opening extends along the axial direction of the body to the end of the body;

[0017] A deformable structure is disposed between the two side walls of the first opening.

[0018] Optionally, the deformable structure includes a foldable movable structure, which is initially folded, can be unfolded under external force, and can be restored to the folded state after the external force is removed.

[0019] Optionally, at least one of the foldable movable structures is provided at the first opening, and when there are at least two foldable movable structures, the foldable movable structures are spaced apart.

[0020] Optionally, the folded movable structure includes a serrated structure, an arc-shaped structure, or a mesh structure.

[0021] Optionally, the folded movable structure is formed by cutting the body.

[0022] Optionally, the deformable structure includes an elastic element.

[0023] Optionally, the body is an annular component, and the deformation absorbing structure includes a through hole that penetrates the wall thickness of the body.

[0024] Optionally, the body is an annular member, and the deformation absorbing structure includes a second opening in the body, the second opening extending along the axial direction of the body to both ends of the body.

[0025] Optionally, the body is an annular member, and the body has a third opening extending along its axial direction, at least one end of the third opening extending to an end of the body;

[0026] The deformation absorption structure includes a first fastening part and a second fastening part that are respectively connected to the two side walls of the third opening, and the first fastening part and the second fastening part are fitted with a gap.

[0027] Optionally, the body is an annular member, and the body has a fourth opening extending along its axial direction, at least one end of the fourth opening extending to an end of the body;

[0028] The deformation absorption structure includes a sliding telescopic structure, which includes a sliding part. The sliding part is connected to one side of the body corresponding to the fourth opening, and the other side of the body corresponding to the fourth opening is provided with a groove for sliding cooperation with the sliding part.

[0029] A shockwave balloon catheter, comprising:

[0030] Inner tube;

[0031] A balloon is fitted around the outer periphery of the inner tube;

[0032] Any of the above-mentioned electrode pairs is disposed inside the balloon, with the inner electrode of the electrode pair disposed on the outer periphery of the inner tube.

[0033] The electrode pair provided by this utility model has the following beneficial effects:

[0034] By utilizing a deformation-absorbing structure to absorb the deformation of the main body, the main body can undergo elastic deformation and change its radial dimension. Therefore, the radial dimension of the main body can increase under external forces during installation to facilitate assembly. After assembly, when the external force is removed, the main body can recover its deformation, returning to a state with a small radial dimension, thereby reducing the outer diameter of the main body. When the insulating component includes both the main body and the deformation-absorbing structure, the deformation-absorbing structure allows the main body of the insulating component to open radially when fitted onto the outer periphery of the inner electrode, allowing the insulating component to be smoothly fitted onto the outer periphery of the inner electrode. When the insulating component is installed in place, the deformation-absorbing structure allows the main body of the insulating component to recover its deformation, thus returning to its radial dimension before installation. When the outer electrode includes both the main body and the deformation-absorbing structure, the deformation-absorbing structure allows the main body of the outer electrode to open radially when fitted onto the outer periphery of the insulating component, allowing the outer electrode to be smoothly fitted onto the outer periphery of the insulating component. When the outer electrode is installed in place, the deformation-absorbing structure allows the main body of the outer electrode to recover its deformation, thus returning to its radial dimension before installation.

[0035] This demonstrates that by employing a body and deformation-absorbing structure, the insulating component and / or the outer electrode can achieve a gapless fit between the insulating component and the inner electrode, and / or between the outer electrode and the insulating component. In contrast, related technologies involve gaps between the insulating component and the inner electrode, and between the outer electrode and the insulating component, to achieve the installation of the insulating component and the inner electrode, and between the outer electrode and the insulating component. Therefore, compared to related technologies, this electrode pair, by incorporating a body and deformation-absorbing structure, eliminates the gaps between the insulating component and the inner electrode, and / or between the outer electrode and the insulating component. This reduces the radial dimension of the insulating component and / or the outer electrode, thereby reducing the overall outer diameter of the electrode pair. When this electrode pair is applied to a shockwave balloon catheter, it helps reduce the outer diameter of the corresponding electrode pair, thus improving the shockwave balloon catheter's ability to pass through narrow and tortuous blood vessels, reducing surgical risks, increasing surgical success rates, and ensuring treatment effectiveness.

[0036] Furthermore, the gapless fit between the insulating component and the inner electrode and / or between the outer electrode and the insulating component can improve the tightness of the connection between the insulating component and the inner electrode, and / or improve the tightness of the connection between the outer electrode and the insulating component. This helps prevent the insulating component and / or the outer electrode from falling off during the use of the electrode pair, thereby improving the reliability and stability of the fixation of the outer electrode, the insulating component and the inner electrode, and improving the reliability of the electrode pair.

[0037] In addition, compared with related technologies that use gap fit to assemble the insulating part with the inner electrode and the outer electrode with the insulating part, the present invention embodiment greatly reduces the accuracy requirements of the inner and outer diameters of the insulating part and / or the outer electrode by setting the body and deformation absorption structure, thereby reducing the processing difficulty and processing cost.

[0038] The shockwave balloon catheter provided by this utility model includes the above-mentioned electrode pair, and at least includes the beneficial effects of the above-mentioned electrode pair. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of the electrode pair provided in a specific embodiment of the present invention when it is installed on the inner tube of the shock wave balloon catheter;

[0041] Figure 2 for Figure 1 Schematic diagram of the structure of the inner and outer electrodes;

[0042] Figure 3 for Figure 1 Schematic diagram of the structure of the insulating component;

[0043] Figure 4 This is a schematic diagram of the shockwave balloon catheter system provided in a specific embodiment of the present invention.

[0044] Figure label:

[0045] 1-Inner electrode; 2-Insulating component; 3-Outer electrode; 41-Body; 421-First opening; 4211-Hollow structure; 422-Folded movable structure; 423-Second opening; 43-First discharge port; 44-Second discharge port; 10-Inner tube; 20-Balloon; 30-Electrode pair; 40-Outer tube; 50-Main unit; 60-Wire. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0047] The core of this invention is to provide an electrode pair with a small outer diameter. Another core aspect of this invention is to provide a shockwave balloon catheter including the aforementioned electrode pair, wherein the electrode pair has a small size.

[0048] Please refer to Figure 1 and Figure 2 This utility model provides an electrode pair for use in a shockwave balloon catheter. The electrode pair includes an inner electrode 1, an insulating member 2, and an outer electrode 3. The inner electrode 1 is disposed on the outer periphery of the inner tube 10 of the shockwave balloon catheter. The insulating member 2 is disposed on the outer periphery of the inner electrode 1. The outer electrode 3 is disposed on the outer periphery of the insulating member 2. At least one of the insulating member 2 and the outer electrode 3 includes a body 41 and a deformation absorption structure. The body 41 is capable of elastic deformation. The deformation absorption structure is disposed on the body 41 and is used to absorb the radial deformation of the body 41 when the body 41 is under stress, and to allow the body 41 to return to its original shape when the body 41 is not under stress.

[0049] In other words, this utility model embodiment utilizes a deformation absorption structure to absorb the deformation of the body 41, allowing the body 41 to undergo elastic deformation and change its radial dimension. Therefore, the body 41 is allowed to undergo external force during installation, resulting in an increased radial dimension, which facilitates assembly. After assembly, when the external force is removed, the body 41 can recover its deformation, thereby placing the body 41 in a state with a small radial dimension, thus reducing the outer diameter of the body 41.

[0050] It should be noted that the insulating component 2 can include a body 41 and a deformation-absorbing structure, or the outer electrode 3 can include a body 41 and a deformation-absorbing structure. Alternatively, the insulating component 2 and the outer electrode 3 can each include a body 41 and a deformation-absorbing structure. Understandably, when the insulating component 2 includes a body 41 and a deformation-absorbing structure, the dimensions of the body 41 and the deformation-absorbing structure correspond to the dimensions of the insulating component 2. In this case, the deformation-absorbing structure allows the body 41 of the insulating component 2 to open radially when fitted onto the outer periphery of the inner electrode 1, enabling the insulating component 2 to be smoothly fitted onto the outer periphery of the inner electrode 1. When the insulating component 2 is installed in place, the deformation-absorbing structure allows the body 41 of the insulating component 2 to recover its deformation, thus restoring its radial dimensions before installation. Similarly, when the outer electrode 3 includes a body 41 and a deformation absorbing structure, the dimensions of the body 41 and the deformation absorbing structure correspond to the dimensions of the outer electrode 3. In this case, the deformation absorbing structure allows the body 41 of the outer electrode 3 to open radially when it is fitted onto the outer periphery of the insulating part 2, so that the outer electrode 3 can be smoothly fitted onto the outer periphery of the insulating part 2. When the outer electrode 3 is installed in place, the deformation absorbing structure allows the body 41 of the outer electrode 3 to recover its deformation and thus return to its radial dimension before installation.

[0051] It can be seen that this structure of the insulating component 2 and / or the external electrode 3 can achieve a gapless fit between the insulating component 2 and the inner electrode 1, and / or a gapless fit between the external electrode 3 and the insulating component 2. In related technologies, to achieve the installation of the insulating component 2 with the inner electrode 1 and the external electrode 3 with the insulating component 2, there is a gap between the insulating component 2 and the inner electrode 1, and between the external electrode 3 and the insulating component 2. Therefore, compared with related technologies, this embodiment of the present invention, by setting the body 41 and the deformation absorption structure, can eliminate the gap between the insulating component 2 and the inner electrode 1 and / or between the external electrode 3 and the insulating component 2. Therefore, the radial dimension of the insulating component 2 and / or the external electrode 3 can be reduced, thereby reducing the overall outer diameter of the electrode pair. When this electrode pair is applied to a shockwave balloon catheter, it helps to reduce the outer diameter of the corresponding electrode pair of the shockwave balloon catheter, thereby improving the ability of the shockwave balloon catheter to pass through narrow and tortuous blood vessels, reducing surgical risks, increasing the success rate of surgery, and ensuring treatment effectiveness.

[0052] Furthermore, the seamless fit between the insulating component 2 and the inner electrode 1, and / or between the outer electrode 3 and the insulating component 2, can improve the tightness of the connection between the insulating component 2 and the inner electrode 1, and / or improve the tightness of the connection between the outer electrode 3 and the insulating component 2. This helps prevent the insulating component 2 and / or the outer electrode 3 from falling off during the use of the electrode pair, thereby improving the reliability and stability of the fixation of the outer electrode 3, the insulating component 2 and the inner electrode 1, and improving the reliability of the electrode pair.

[0053] In addition, compared with the related technologies that use gap fit to assemble the insulating part 2 with the inner electrode 1 and the outer electrode 3 with the insulating part 2, the present invention embodiment, by setting the body 41 and the deformation absorption structure, also greatly reduces the accuracy requirements of the inner and outer diameters of the insulating part 2 and / or the outer electrode 3, thereby reducing the processing difficulty and processing cost.

[0054] It should be noted that this embodiment does not limit the specific setting of the body 41 and the deformation absorption structure, as long as the deformation absorption structure can be used to allow the body 41 to undergo radial deformation.

[0055] For example, there can be at least one deformation absorption structure. When there are multiple deformation absorption structures, these deformation absorption structures can be arranged circumferentially on the body.

[0056] Please refer to Figure 2 In some embodiments, the body 41 is an annular member, and the deformation absorption structure includes a first opening 421 and a deformable structure 422. The first opening 421 is disposed on the body 41, and at least one end of the first opening 421 extends along the axial direction of the body 41 to the end of the body 41. The deformable structure 422 is disposed between the two side walls of the first opening 421.

[0057] In other words, this embodiment creates a circumferentially open structure by opening a first opening 421 on the annular body 41 and extending the first opening 421 along the axial direction of the body 41 to at least one end of the body 41. This facilitates elastic deformation of the body 41. Furthermore, by connecting a deformable structure 422 between the two side walls of the first opening 421, the body 41 maintains the integrity of the annulus, preventing the insulation element 2 and / or the external electrode 3 from falling off during surgery. Moreover, the deformable structure 422 can extend as the body 41 expands radially and retract as the body 41 retracts radially, thereby achieving self-expansion and self-retraction of the insulation element 2 and / or the external electrode 3.

[0058] For example, the deformable structure 422 and the two side walls of the first opening 421 can be integral structures or separate structures, and can be connected by means of bonding, welding or other methods.

[0059] Furthermore, such as Figure 2 As can be seen from the display, in some embodiments, the deformable structure 422 includes a foldable movable structure. The foldable movable structure is initially in a folded state, can be unfolded under the action of external force, and can be restored to the folded state after the external force is removed.

[0060] It is understandable that the foldable movable structure, when folded, allows for a smaller overall radial dimension of the body 41, while when unfolded, it allows for a larger overall radial dimension. Therefore, when installing the insulating component 2 and / or the external electrode 3, an external force can be applied to unfold the foldable movable structure, thereby increasing the overall radial dimension of the body 41 to facilitate the installation of the insulating component 2 and / or the external electrode 3. After installation, the external force is removed, allowing the body 41 to return to its original shape under its own elastic restoring force. At this point, the foldable movable structure adapts to the repositioning of the body 41 as it folds.

[0061] It should be noted that this embodiment does not limit the specific number of folded movable structures at the first opening 421, as long as the two side walls of the first opening 421 can be connected to avoid damaging the integrity of the annular body 41.

[0062] In some embodiments, at least one foldable movable structure is provided at the first opening 421, and when there are at least two foldable movable structures, the foldable movable structures are spaced apart.

[0063] In other words, only one foldable movable structure can be provided at the first opening 421. The width of this foldable movable structure along the axial direction of the body 41 can completely cover the axial length of the first opening 421, or it can only cover a part of the axial direction of the first opening 421, and the specific placement of the foldable movable structure is not limited. Alternatively, two or more foldable movable structures can be provided at the first opening 421. In this case, the foldable movable structures are spaced apart along the axial direction of the first opening 421, thereby dividing the first opening 421 into a hollow structure 4211 between any two adjacent foldable movable structures (e.g., ...). Figure 2 As shown in the figure, multiple folded movable structures make the connection between the two side walls of the first opening 421 more stable and the force more balanced.

[0064] In addition, it should be noted that the number of first openings 421 is not limited in this embodiment of the utility model. That is, the body 41 may have one first opening 421 along the circumference, or at least two first openings 421 along the circumference. In other words, the deformation absorption structure may be located at one place along the circumference of the body 41, or at least two places along the circumference of the body 41, thereby forming one row or at least two rows of deformation absorption structures.

[0065] In addition, the above embodiments do not limit the specific folding shape of the foldable movable structure, as long as the foldable movable structure can be folded and unfolded.

[0066] In some embodiments, the foldable movable structure includes a serrated structure, an arcuate structure, or a mesh structure. These structures are simple and easy to implement. Of course, in other embodiments, the foldable movable structure can also be other folding shapes. For example, as... Figure 2 As shown, the foldable movable structure can be an inverted "W" shape; in other embodiments, the foldable movable structure can also be an "S" shape, a "C" shape, an inverted "V" shape, etc. Exemplarily, the folding direction of the foldable movable structure can be in various directions on the outer peripheral surface of the body 41, without protruding radially to the outside of the outer peripheral surface, so as to avoid increasing the radial dimension of the insulating member 2 and / or the outer electrode 3.

[0067] Furthermore, the above embodiments do not limit the specific arrangement of the foldable movable structure in the body 41, as long as the foldable movable structure can be arranged in the body 41.

[0068] In some embodiments, the foldable movable structure is formed by cutting the body 41. That is, in this embodiment, the foldable movable structure and the body 41 are an integral structural component, and the foldable movable structure is cut out simultaneously by machining the first opening 421 on the body 41. It can be understood that by opening the first opening 421 on the body 41 and cutting out the foldable movable structure at the first opening 421, under the action of external force, the body 41 and the foldable movable structure can utilize the avoidance effect of the first opening 421 and the elastic deformation of the material itself to achieve deformation, thereby allowing the radial dimension of the insulating member 2 and / or the external electrode 3 to change. This processing method is simple and facilitates the processing of the insulating member 2 and the external electrode 3 with the body 41 and the deformation absorption structure.

[0069] In addition, considering another implementation of the deformation absorption structure, in some embodiments, the deformable structure 422 includes an elastic element.

[0070] It is understandable that the elastic element itself is elastic and can undergo elastic deformation under external force. Therefore, the elastic deformation can be absorbed by the structure to adapt to the radial dimension change of the body 41. When the insulating element 2 and / or the external electrode 3 are installed, the elastic element can be stretched by the external force, thereby increasing the overall radial dimension of the body 41 to achieve the installation of the insulating element 2 and / or the external electrode 3. After installation, the external force is removed, allowing the body 41 and the elastic element to return to their original shape under the action of their own elastic restoring force.

[0071] This embodiment does not limit the shape of the elastic element. The elastic element can be an arc-shaped spring, an arc-shaped sheet, or an arc-shaped elastic block, etc.

[0072] Considering another implementation of the deformation absorption structure, in some embodiments, the body 41 is an annular member, and the deformation absorption structure includes a through hole provided in the body 41 and penetrating the wall thickness of the body 41.

[0073] It is understandable that after a through hole is opened on the body 41, the existence of the through hole itself can weaken the structural strength of the body 41 near the through hole, and under the action of external force, the body 41 can undergo a certain degree of deformation.

[0074] Additionally, please refer to Figure 3 In other embodiments, the body 41 is an annular member, and the deformation absorption structure includes a second opening 423 provided in the body 41, the second opening 423 extending along the axial direction of the body 41 to both ends of the body 41.

[0075] In other words, in this embodiment, by opening a second opening 423 on the body 41, the body 41 is formed into a C-shaped structure. Compared with opening a through hole in the body 41, the second opening 423 extends through both ends of the body 41 along the axial direction of the body 41, so that the body 41 is not structurally connected at the second opening 423. Therefore, the deformation of the body 41 can be absorbed by the second opening 423 to realize the change of the radial dimension of the body 41.

[0076] In other embodiments, the body 41 is an annular member, and the body 41 has a third opening extending along its axial direction, at least one end of the third opening extending to the end of the body 41; the deformation absorption structure includes a first fastening part and a second fastening part respectively connected to the two side walls of the third opening, and the first fastening part and the second fastening part have a gap fit.

[0077] In other words, this embodiment utilizes the first and second fastening parts to connect the two side walls of the third opening, which helps to prevent the insulating part 2 and / or the external electrode 3 from falling off. Furthermore, since the first and second fastening parts are fitted with a gap, the gap between them allows the body 41 to have a certain deformation. That is, in its natural state, the gap between the first and second fastening parts is minimal, which can be zero. When the insulating part 2 and / or the external electrode 3 are installed, the body 41 can be deformed by external force, increasing its radial dimension. At this time, the first and second fastening parts move away from each other under the action of the body 41, increasing the gap between them. This avoids interference with the increase in the radial dimension of the body 41, thus enabling the installation of the insulating part 2 and / or the external electrode 3. After installation, the external force is removed, allowing the body 41 to return to its original shape under its own elastic restoring force. At this time, the first and second fastening parts move closer to each other under the action of the body 41, reducing the gap between them, so that the body 41 can return to its original shape.

[0078] It should be noted that this embodiment does not limit the specific structure of the first and second fastening parts, as long as the fastening of the first and second fastening parts can be achieved.

[0079] In other embodiments, the body 41 is an annular member, and the body 41 has a fourth opening extending along its axial direction, at least one end of the fourth opening extending to the end of the body 41; the deformation absorption structure includes a sliding telescopic structure, the sliding telescopic structure includes a sliding part, the sliding part is connected to one side of the body 41 corresponding to the fourth opening, and the other side of the body 41 corresponding to the fourth opening is provided with a groove for slidingly engaging with the sliding part.

[0080] In other words, this embodiment utilizes the sliding fit between the sliding part and the groove to adapt to changes in the radial dimension of the body 41. When installing the insulating component 2 and / or the external electrode 3, external force can deform the body 41, increasing its radial dimension. At this time, the sliding part slides relative to the groove to accommodate the increased radial dimension of the body 41, thereby enabling the installation of the insulating component 2 and / or the external electrode 3. After installation, the external force is removed, allowing the body 41 to return to its original shape under its own elastic restoring force. Then, the sliding part slides relative to the groove in the opposite direction to allow the body 41 to return to its original shape. It can be understood that the sliding part and the groove have a certain guiding effect on the deformation of the body 41, which helps to ensure the stability of the body 41 structure.

[0081] It should be noted that when both the insulating component 2 and the outer electrode 3 include the body 41 and the deformation absorption structure, the deformation absorption structure of the insulating component 2 and the deformation absorption structure of the outer electrode 3 can be the same or different. The deformation absorption structure of the insulating component 2 and the deformation absorption structure of the outer electrode 3 can be a combination of any two of the above deformation absorption structures.

[0082] For example, to facilitate discharge control, the deformation absorption structure of the outer electrode 3 may not be formed as a discharge region; that is, the deformation absorption structure of the outer electrode 3 is not connected to the discharge port of the inner electrode. Further, the radial arrangement of the deformation absorption structure of the outer electrode 3 from the outside to the inside can include the following: 1) the deformation absorption structure of the outer electrode 3 and the deformation absorption structure of the insulating member 2, in which case no inner electrode is provided; 2) the deformation absorption structure of the outer electrode 3, the closed structure of the insulating member 2, and the inner electrode 1, in which case the closed structure of the insulating member can prevent the inner and outer electrodes from being connected.

[0083] In addition, it is understandable that, such as Figure 2 As shown, the outer electrode 3 has a first discharge port 43 that penetrates its wall thickness at the position corresponding to the inner electrode 1, such as... Figure 3As shown, the insulating component 2 has a second discharge port 44 penetrating its wall thickness at the position corresponding to the inner electrode 1, so that the inner electrode 1 can be exposed. Therefore, when this electrode pair is applied to a shock wave balloon catheter, the presence of the first discharge port 43 and the second discharge port 44 allows the inner electrode 1 and the outer electrode 3 to discharge. The electric arc breaks down the contrast fluid between the inner electrode 1 and the outer electrode 3, causing it to vaporize and expand, generating a shock wave. The number of the first discharge port 43 and the second discharge port 44 are consistent, and each can be at least one.

[0084] In some embodiments, the inner electrode 1 may be a complete annular structure or may not be an annular structure. For example, it may be a sheet-like structure covering the discharge port and a portion of its surrounding area.

[0085] like Figure 2 As shown, in some embodiments, the external electrode 3 includes a body 41 and a deformation absorption structure, and the number of first discharge ports 43 is two, with the two first discharge ports 43 symmetrically disposed on the body 41 about the deformation absorption structure.

[0086] like Figure 3 As shown, in some embodiments, the insulating member 2 includes a body 41 and a deformation absorption structure, and the number of second discharge ports 44 is two, with the two second discharge ports 44 symmetrically disposed on the body 41 about the deformation absorption structure.

[0087] Please refer to Figure 4 In addition to the aforementioned electrode pairs, this invention also provides a shockwave balloon catheter including the electrode pairs disclosed in the above embodiments. The shockwave balloon catheter further includes an inner tube 10 and a balloon 20, with the balloon 20 sleeved on the outer periphery of the inner tube 10. An electrode pair 30 is disposed within the balloon 20, with the inner electrode 1 of the electrode pair 30 located on the outer periphery of the inner tube 10. The structures of other parts of the shockwave balloon catheter are described in the prior art and will not be repeated here.

[0088] The key point of this embodiment is that the shockwave balloon catheter uses the electrode pair disclosed in any of the above embodiments. The outer diameter of the electrode pair is small, which makes the outer diameter of the shockwave balloon catheter corresponding to the position of the electrode pair small. Therefore, the shockwave balloon catheter can improve its ability to pass through narrow and tortuous blood vessels and improve the treatment effect.

[0089] Please continue to refer to this. Figure 4 In addition to the shockwave balloon catheter described above, this utility model also provides a shockwave balloon catheter system including the shockwave balloon catheter disclosed in the above embodiments. The shockwave balloon catheter system also includes a main unit 50, and the lead wire 60 of the shockwave balloon catheter is connected to the main unit 50. For the structure of the main unit 50 and other parts of the shockwave balloon catheter system, please refer to the relevant technology, which will not be described in detail here.

[0090] The key point of this embodiment is that the shockwave balloon catheter system uses the shockwave balloon catheter disclosed in the above embodiments, and at least includes the beneficial effects of the above shockwave balloon catheter, which will not be repeated here.

[0091] It should also be noted that, in this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0092] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0093] The electrode pair and shockwave balloon catheter provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. An electrode pair, characterized in that, Applications in shockwave balloon catheters include: An inner electrode (1) is provided on the outer periphery of the inner tube (10) of the shock wave balloon catheter; An insulating element (2) is disposed on the outer periphery of the inner electrode (1); An external electrode (3) is disposed on the outer periphery of the insulating member (2); The structure of at least one of the insulating member (2) and the external electrode (3) includes: The body (41) can undergo elastic deformation; A deformation absorbing structure is provided on the body (41) to absorb the radial deformation generated by the body (41) when the body (41) is subjected to force, and to enable the body (41) to return to its original state when the body (41) is not subjected to force.

2. The electrode pair according to claim 1, characterized in that, The body (41) is a ring-shaped component, and the deformation absorption structure includes: A first opening (421) is provided on the body (41), and at least one end of the first opening (421) extends along the axial direction of the body (41) to the end of the body (41). A deformable structure (422) is disposed between the two side walls of the first opening (421).

3. The electrode pair according to claim 2, characterized in that, The deformable structure (422) includes a foldable movable structure. The foldable movable structure is initially folded and can be unfolded under the action of external force. After the external force is removed, it can be restored to the folded state.

4. The electrode pair according to claim 3, characterized in that, At least one of the foldable movable structures is provided at the first opening (421). When there are at least two foldable movable structures, the foldable movable structures are spaced apart.

5. The electrode pair according to claim 3, characterized in that, The folded movable structure includes a serrated structure, an arc-shaped structure, or a mesh-like structure.

6. The electrode pair according to any one of claims 3-5, characterized in that, The folded movable structure is formed by cutting the body (41).

7. The electrode pair according to claim 2, characterized in that, The deformable structure (422) includes an elastic element.

8. The electrode pair according to claim 1, characterized in that, The body (41) is an annular member, and the deformation absorption structure includes a through hole in the body (41) that penetrates the wall thickness of the body (41).

9. The electrode pair according to claim 1, characterized in that, The body (41) is an annular member, and the deformation absorption structure includes a second opening (423) provided in the body (41), the second opening (423) extending along the axial direction of the body (41) to both ends of the body (41).

10. The electrode pair according to claim 1, characterized in that, The body (41) is an annular member, and the body (41) has a third opening extending along its axial direction, at least one end of the third opening extending to the end of the body (41). The deformation absorption structure includes a first fastening part and a second fastening part that are respectively connected to the two side walls of the third opening, and the first fastening part and the second fastening part are fitted with a gap.

11. The electrode pair according to claim 1, characterized in that, The body (41) is an annular member, and the body (41) has a fourth opening extending along its axial direction, at least one end of the fourth opening extending to the end of the body (41). The deformation absorption structure includes a sliding telescopic structure, which includes a sliding part. The sliding part is connected to one side of the body (41) corresponding to the fourth opening. The other side of the body (41) corresponding to the fourth opening is provided with a groove for sliding cooperation with the sliding part.

12. A shockwave balloon catheter, characterized in that, include: Inner tube (10); A balloon (20) is fitted around the outer periphery of the inner tube (10); The electrode pair (30) according to any one of claims 1-11 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).

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