Electrode assembly of shock wave catheter and shock wave catheter

Abstract

The shock wave catheter comprises an inner tube and a balloon, a solution cavity used for storing conductive solution is formed in the balloon, and the inner tube is inserted into the solution cavity; the electrode assembly is arranged in the solution cavity and sleeves the inner tube; the electrode assembly comprises a plurality of inner conductive pieces which are annularly arranged in the radial direction of the inner pipe; the wire is connected with the inner conductive piece and is used for transmitting electric signals; the insulating layer sleeves the inner tube and is positioned on one side, deviating from the inner tube, of the inner conductive part; a first gap is formed in a position, directly facing the inner conductive piece, on the insulating layer; the insulating layer is sleeved with the outer conductive piece, and a first conduction groove is formed in the position, right opposite to the first notch, of the outer conductive piece; the outer conductive part and the inner conductive part form an electrode pair used for generating high-voltage pulses. The contact surface area between the outer conductive part and the inner conductive part is increased by arranging the first conduction groove, more bubbles can be conveniently generated, the pulse frequency is increased, and the crushing effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an electrode assembly of a shock wave catheter and a shock wave catheter. Background Art

[0002] The shock wave catheter is a medical device used to treat vascular calcification. When in use, the balloon catheter on the shock wave catheter is placed close to the calcified lesion in the vascular lumen through low-pressure filling, and then the shock wave generator is controlled to provide pulsed driving power to the shock wave balloon. The conductive liquid in the balloon generates bubbles, which will conduct shock waves in all directions after expanding and collapsing, that is, intermittently output divergent low-intensity shock wave energy to the blood vessels, thereby fracturing the calcified plaques, thereby improving the degree of vascular stenosis and preparing for subsequent treatment.

[0003] However, due to the small size of a single electrode pair and the limited number of bubbles generated, existing shock wave balloons often arrange multiple sets of electrode pairs along the axial direction of the catheter to increase the breakdown frequency of the shock wave. However, the arrangement of electrode pairs on the catheter increases the rigidity of the overall structure, resulting in reduced flexibility of the catheter, making it difficult for the shock wave catheter to pass through narrow or curved cavities during movement, affecting the convenience of operation.

[0004] Therefore, the prior art still needs to be improved and developed. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present utility model is to provide an electrode assembly for a shock wave guide tube and a shock wave guide tube, aiming to solve the problem that the electrode assembly structure of the existing shock wave guide tube occupies a large space, has high axial rigidity, and has insufficient flexibility of the overall structure, resulting in inconvenient operation.

[0006] The technical solution of the utility model is as follows:

[0007] An electrode assembly of a shock wave catheter, the shock wave catheter comprising an inner tube and a balloon, wherein a solution cavity for storing a conductive solution is formed in the balloon, and the inner tube is inserted into the solution cavity; the electrode assembly is arranged in the solution cavity and sleeved on the inner tube; wherein the electrode assembly comprises:

[0008] A plurality of inner conductive members are arranged in a ring shape along the radial direction of the inner tube;

[0009] A conductor, connected to the inner conductive member, for transmitting electrical signals;

[0010] an insulating layer, which is sleeved on the inner tube and is located on a side of the inner conductive member away from the inner tube; a first notch is formed on the insulating layer at a position facing the inner conductive member;

[0011] An outer conductive member is sleeved on the insulating layer, and a first conducting groove is provided on the outer conductive member at a position directly facing the first notch;

[0012] Wherein, the outer conductive member and the inner conductive member form an electrode pair for generating a high voltage pulse.

[0013] The electrode assembly of the shock waveguide tube, wherein a second notch is formed on the side of the insulating layer facing away from the first notch; a second conducting groove is provided on the outer conductive member at a position facing the second notch; wherein the inner conductive member is at least partially exposed in the second conducting groove.

[0014] The electrode assembly of the shock wave guide tube, wherein the first notch and the second notch extend along the axial direction of the inner tube; the first conducting groove and the second conducting groove extend along the axial direction of the inner tube.

[0015] The electrode assembly of the shock wave guide tube, wherein the inner conductive member is bonded to the inner tube; and / or the inner wall of the insulating layer is bonded to the inner conductive member; and / or the outer conductive member is bonded to the insulating layer.

[0016] The electrode assembly of the shock wave guide tube, wherein the shape of the first conducting groove is square, rectangular or semicircular.

[0017] The electrode assembly of the shock wave guide tube, wherein the inner conductive members are provided with four, and the four inner conductive members are arranged in sequence at intervals of 90° along the circumferential direction of the inner tube; the conductive wires are provided with four, and the four conductive wires are connected to the four inner conductive members in a one-to-one correspondence; and / or the conductive wires include at least one positive electrode conductive wire and at least one negative electrode conductive wire.

[0018] In the electrode assembly of the shock waveguide tube, an arc-shaped protrusion is protruding from the side wall of the first conducting groove.

[0019] In the electrode assembly of the shock wave guide tube, the insulating layer is a rubber insulating layer or a polyimide insulating layer.

[0020] The present application also discloses a shock wave guide tube, which comprises an electrode assembly of any shock wave guide tube as described above.

[0021] In the shock wave guide tube, the electrode assemblies are provided in a plurality of groups, and the plurality of groups of the electrode assemblies are arranged at intervals along the axial direction of the inner tube; and a connecting line is provided between two adjacent groups of the electrode assemblies.

[0022] Compared with the prior art, the embodiment of the utility model has the following advantages:

[0023] The electrode assembly disclosed in the utility model is sleeved on the inner tube, and a plurality of inner conductive parts are annularly arranged along the radial direction of the inner tube to form an electrode pair with the outer conductive parts sleeved in an annular manner, which occupies less space on the inner tube in the axial direction, so it is beneficial to improve the overall flexibility of the shock wave guide tube and increase the passing rate of the narrow cavity.

[0024] Moreover, the insulating layer separates the outer conductive part from the inner conductive part to avoid contact short circuit; the first notch set on the insulating layer partially exposes the inner conductive part, and only at least three sides of the first conductive groove on the outer conductive part and the corresponding inner conductive part surface produce a breakdown effect, which increases the area of ​​the bubble generation region, reduces the corrosion rate of the conductive part, and is beneficial to improving the efficiency of bubble generation, increasing shock wave energy and pulse frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is an assembly diagram of the electrode assembly of the shock wave guide tube in the utility model;

[0027] Figure 2 It is a cross-sectional view along the radial direction of the shock wave guide tube in the utility model;

[0028] Figure 3 It is a schematic diagram of the structure of the foreign conductive parts in the utility model;

[0029] Figure 4 It is an assembly diagram of the electrode assembly and the inner tube in the utility model;

[0030] Figure 5 This is a schematic structural diagram of an outer conductive member in another embodiment of the utility model;

[0031] Figure 6 It is a schematic structural diagram of an outer conductive member in another embodiment of the present utility model.

[0032] Among them, 10, inner tube; 20, balloon; 30, solution cavity; 100, electrode assembly; 110, inner conductive part; 120, wire; 130, insulating layer; 131, first notch; 132, second notch; 140, outer conductive part; 141, first conducting groove; 142, second conducting groove; 143, arc-shaped protrusion. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figure 1 In one embodiment of the utility model application, an electrode assembly 100 of a shock wave catheter is disclosed, the shock wave catheter includes an inner tube 10 and a balloon 20, a solution cavity 30 for storing a conductive solution is formed in the balloon 20, the inner tube 10 is inserted into the solution cavity 30; the electrode assembly 100 is disposed in the solution cavity 30 and is sleeved on the inner tube 10.

[0035] Specifically, the electrode assembly 100 includes a wire 120, an insulating layer 130, an outer conductive member 140 and a plurality of inner conductive members 110, wherein the plurality of inner conductive members 110 are arranged in a ring along the radial direction of the inner tube 10; the wire 120 is connected to the inner conductive member 110 for transmitting electrical signals; the insulating layer 130 is sleeved on the inner tube 10 and is located on the side of the inner conductive member 110 away from the inner tube 10; a first notch 131 is formed on the insulating layer 130 at a position facing the inner conductive member 110; the outer conductive member 140 is sleeved on the insulating layer 130, and a first conducting groove 141 is provided on the outer conductive member 140 at a position facing the first notch 131; the outer conductive member 140 and the inner conductive member 110 form an electrode pair for generating high voltage pulses.

[0036] The electrode assembly 100 disclosed in this embodiment is sleeved on the inner tube 10, located in the balloon 20, and immersed in a conductive liquid. Several inner conductive parts 110 are arranged in a ring along the radial direction of the inner tube 10, and gaps are left between adjacent inner conductive parts 110. Each inner conductive part 110 forms an electrode pair with an outer conductive part 140 sleeved in a ring. When the circuit is turned on and high voltage is formed between the inner conductive part 110 and the outer conductive part 140, the conductive liquid in the first notch 131 and the first conductive groove 141 will be broken down to form a passage, and the conductive liquid will be vaporized to produce bubbles, and the bubbles will expand and collapse to finally form shock waves. It can be seen that by arranging multiple groups of electrode pairs in a ring, the motor assembly occupies less space in the axial direction on the inner tube 10, which is beneficial to improve the overall flexibility of the shock wave guide tube and increase the passing rate of the shock wave guide tube in a narrow cavity.

[0037] Specifically, in this embodiment, each inner conductive member 110 is connected to a wire 120, at least part of the wire 120 is connected to the positive electrode of the external power source, and the other part of the wire 120 is connected to the negative electrode of the external power source, so that a high voltage is formed when the circuit is turned on to stimulate the breakdown phenomenon. Figure 2 As shown, there are four inner conductive members 110, and the four inner conductive members 110 are arranged in sequence at intervals of 90° along the circumferential direction of the inner tube 10; by setting the maximum interval angle, the influence between adjacent inner conductive members 110 is minimized to avoid circuit failure. There are four wires 120, and the four wires 120 are connected to the four inner conductive members 110 in a one-to-one correspondence; the wires 120 include at least one positive wire 120 and at least one negative wire 120. There are four wires 120 in total, of which one wire 120 is connected to the positive pole of the power supply, and the other three wires 120 are connected to the negative pole of the power supply.

[0038] In addition, in another implementation of this embodiment, two of the four wires 120 can be connected to the positive electrode of the power supply, and the other two can be connected to the negative electrode of the power supply; or three can be connected to the positive electrode of the power supply, and only one can be connected to the negative electrode of the power supply. According to the requirements of actual production and use, the structure of the electrode assembly 100 can be flexibly selected for easy use.

[0039] Specifically, the insulating layer 130 separates the outer conductive member 140 from the inner conductive member 110 to avoid contact short circuit; the first notch 131 set on the insulating layer 130 partially exposes the inner conductive member 110, and a breakdown effect can be generated between at least three sides of the first conductive groove 141 on the outer conductive member 140 and the corresponding surface of the inner conductive member 110, thereby increasing the area of ​​the region where bubbles are generated, reducing the corrosion rate of the conductive member, and being beneficial to improving the efficiency of bubble generation, and increasing the shock wave energy and pulse frequency.

[0040] Specifically, as an implementation of this embodiment, it is disclosed that along the axial direction of the inner tube 10, the length of the insulating layer 130 is greater than or equal to the length of the outer conductive member 140. The end of the inner conductive member 110 is shielded by the insulating layer 130, so that bubbles are generated only in the first notch 131 of the outer conductive member 140 and the inner conductive member 110, and no breakdown phenomenon occurs in other parts, thereby avoiding corrosion.

[0041] like Figure 1 and Figure 3 As shown, as another implementation of this embodiment, a second notch 132 is formed on the side of the insulating layer 130 facing away from the first notch 131; a second conductive groove 142 is provided on the outer conductive member 140 at a position opposite to the second notch 132; wherein the inner conductive member 110 is at least partially exposed in the second conductive groove 142.

[0042] In this embodiment, by providing the second notch 132 and the second conducting groove 142, the area of ​​the region on the outer conductive member 140 where bubbles can be generated by high voltage breakdown is further increased, the working efficiency of the electrode assembly 100 is further improved, and the pulse frequency is enhanced. In addition, the outer conductive member 140 is hollowed out to provide a plurality of first notches 131 and second notches 132, and the space occupied by the outer conductive member 140 is reduced, which is more conducive to reducing the influence of the electrode assembly 100 on the rigidity of the overall structure of the shock wave guide tube, so that the shock wave guide tube can have better flexibility.

[0043] like Figure 3 and Figure 4 As shown, as another implementation of this embodiment, the first notch 131 and the second notch 132 extend along the axial direction of the inner tube 10; the first conducting groove 141 and the second conducting groove 142 extend along the axial direction of the inner tube 10.

[0044] In this embodiment, the first notch 131 and the second notch 132 are arranged along the axial direction of the inner tube 10, and are respectively located on both sides of the outer conductive member 140; the inner conductive member 110 is also arranged along the axial direction of the inner tube 10; therefore, by setting the inner conductive member 110 with a suitable length, the two ends of the inner conductive member 110 are respectively exposed in the first notch 131 and the second notch 132 arranged along the axial direction of the inner tube 10, bubbles can be generated at the same time, the operating frequency of the shock wave is increased, and the breakdown effect is enhanced.

[0045] Specifically, as another implementation of this embodiment, the inner conductive member 110 is bonded to the inner tube 10. In this embodiment, the bonding connection can improve processing efficiency, reduce operation difficulty, and make the inner conductive member 110 firmly connected to the inner tube 10, which can continue to remain stable in the use scenario of continuously exciting shock waves, which is conducive to long-term use.

[0046] Specifically, as another implementation of this embodiment, it is disclosed that the inner wall of the insulating layer 130 is bonded to the inner conductive member 110. In this embodiment, the insulating layer 130 is stably covered on the inner conductive member 110 by bonding. During use, whether the shock wave guide tube is bent or moved, or the shock wave is impacted, the insulating layer 130 and the inner conductive member 110 remain relatively still and the structure is stable.

[0047] Specifically, as another implementation of this embodiment, the outer conductive member 140 is bonded to the insulating layer 130. In this embodiment, the outer conductive member 140 is sleeved outside the insulating layer 130, so the bonding with the insulating layer 130 can be kept stable.

[0048] In another implementation of the present embodiment, the inner tube 10, the inner conductive member 110, the insulating layer 130 and the outer conductive member 140 are sequentially bonded and connected, the overall structure of the electrode assembly 100 is stable, and the connection between the electrode assembly 100 and the inner tube 10 is firm, which is beneficial to improving the stability of the shock wave guide tube during use.

[0049] It should be noted that the connection methods among the inner tube 10, the inner conductive part 110, the insulating layer 130 and the outer conductive part 140 are only exemplified in this embodiment and are not exhaustive. The protection scope of the present utility model is not limited thereto. Other connection methods (such as forging and coating) should also be within the scope of protection of the present application as long as they can achieve the technical effects disclosed in the present application and are equivalent replacements for the concept of the present utility model.

[0050] like Figure 3 and Figure 5 As shown, as another implementation of this embodiment, the shape of the first conducting groove 141 is disclosed to be square, rectangular or semicircular. The side wall of the first conducting groove 141 disclosed in this embodiment is the area where breakdown occurs with the inner conductive member 110. The shape of the first conducting groove 141 is set to be square or rectangular, one side of which is open, and the other three sides can all be broken down. The area where bubbles are generated is large, which is conducive to increasing the number of shock waves. When the shape of the first conducting groove 141 is set to be semicircular, one side of its diameter is open, and the arc side can be broken down, so bubbles can be generated in large quantities and evenly in the first conducting groove 141. It can be seen that by setting the first conducting groove 141 with a longer circumference and a symmetrical shape, it is beneficial to increase the contactable area of ​​the outer conductive member 140, so as to facilitate the uniform generation of more bubbles.

[0051] like Figure 6 As shown, as another implementation of this embodiment, an arc-shaped protrusion 143 is provided on the side wall of the first conducting groove 141. In this embodiment, the first conducting groove 141 can be provided with the same shape as the first notch 131 to facilitate alignment. The arc-shaped protrusion 143 can be provided on the side of the first conducting groove 141 to increase the length of the side wall, further increase the area of ​​the region where breakdown can occur on the outer conductive member 140, increase the frequency of shock wave generation, and enhance the breakdown effect.

[0052] Specifically, as another implementation of this embodiment, it is disclosed that the insulating layer 130 is a rubber insulating layer 130 or a polyimide insulating layer 130. In this embodiment, the rubber insulating layer 130 or the polyimide insulating layer 130 has certain toughness, good insulation and long service life, and the inner conductive member 110 can be separated from the outer conductive member 140. In addition, if the shock waveguide tube is folded during movement and the balloon 20 is squeezed to the electrode assembly 100, the insulating layer 130 has a certain buffering capacity, which reduces hard collisions and avoids damage to the inner conductive member 110, the outer conductive member 140 or the balloon 20.

[0053] It should be noted that the types of insulating layers 130 are only exemplified in this embodiment, but the protection scope of the present invention is not limited thereto. As long as other types of insulating layers 130 can achieve the technical effects disclosed in this application, they should also be within the protection scope of this application as equivalent replacements for the concept of the present invention.

[0054] As another embodiment of the present application, a shock wave guide tube is disclosed, wherein the shock wave guide tube comprises the electrode assembly 100 as described above.

[0055] Specifically, as an implementation of this embodiment, it is disclosed that the electrode assembly 100 is provided with a plurality of groups, and the plurality of groups of the electrode assemblies 100 are arranged at intervals along the axial direction of the inner tube 10; and a connecting line is provided between two adjacent groups of the electrode assemblies 100.

[0056] By providing multiple groups of electrode assemblies 100, the frequency of shock wave generation can be increased, and the crushing ability of the shock wave guide tube can be adjusted, which is beneficial to increase the use scenarios.

[0057] In summary, the present application discloses an electrode assembly 100 of a shock wave catheter, wherein the shock wave catheter comprises an inner tube 10 and a balloon 20, wherein a solution cavity 30 for storing a conductive solution is formed in the balloon 20, and the inner tube 10 is inserted into the solution cavity 30; the electrode assembly 100 is disposed in the solution cavity 30 and sleeved on the inner tube 10; wherein the electrode assembly 100 comprises a wire 120, an insulating layer 130, an outer conductive member 140 and a plurality of inner conductive members 110, wherein the plurality of inner conductive members 110 are arranged in a ring shape along the radial direction of the inner tube 10; The wire 120 is connected to the inner conductive member 110 for transmitting electrical signals; the insulating layer 130 is sleeved on the inner tube 10 and is located on the side of the inner conductive member 110 away from the inner tube 10; a first notch 131 is formed on the insulating layer 130 at a position directly opposite to the inner conductive member 110; the outer conductive member 140 is sleeved on the insulating layer 130, and a first conducting groove 141 is provided on the outer conductive member 140 at a position directly opposite to the first notch 131; the outer conductive member 140 and the inner conductive member 110 form an electrode pair for generating high-voltage pulses. The electrode assembly 100 disclosed in this embodiment is sleeved on the inner tube 10, and a plurality of inner conductive members 110 are annularly arranged along the radial direction of the inner tube 10, and an electrode pair is formed with the annularly sleeved outer conductive member 140, which occupies less space in the axial direction of the inner tube 10, so it is beneficial to improve the overall flexibility of the shock wave guide tube and increase the pass rate of the narrow cavity. Moreover, the insulating layer 130 separates the outer conductive component 140 and the inner conductive component 110 to avoid contact short circuit; the first notch 131 set on the insulating layer 130 partially exposes the inner conductive component 110, and only at least three sides of the first conductive groove 141 on the outer conductive component 140 produce a breakdown effect with the corresponding surface of the inner conductive component 110, thereby increasing the area of ​​the region where bubbles are generated, reducing the corrosion rate of the conductive component, and being beneficial to improving the efficiency of bubble generation, increasing shock wave energy and pulse frequency.

[0058] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0059] It should be noted that the present invention takes the electrode assembly of a shock wave guide tube as an example to introduce the specific structure and working principle of the present invention, but the application of the present invention is not limited to the electrode assembly of a shock wave guide tube, and can also be applied to the production and use of other similar workpieces.

[0060] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrode assembly of a shock wave catheter, the shock wave catheter comprising an inner tube and a balloon, wherein a solution cavity for storing a conductive solution is formed in the balloon, and the inner tube is inserted into the solution cavity; The electrode assembly is arranged in the solution chamber and sleeved on the inner tube; characterized in that: The electrode assembly comprises: A plurality of inner conductive members are arranged in a ring shape along the radial direction of the inner tube; A conductor, connected to the inner conductive member, for transmitting electrical signals; an insulating layer, which is sleeved on the inner tube and is located on a side of the inner conductive member away from the inner tube; a first notch is formed on the insulating layer at a position facing the inner conductive member; An outer conductive member is sleeved on the insulating layer, and a first conducting groove is provided on the outer conductive member at a position directly facing the first notch; Wherein, the outer conductive member and the inner conductive member form an electrode pair for generating a high voltage pulse.

2. The electrode assembly of the shock wave guide tube according to claim 1, characterized in that: A second notch is formed on the insulating layer at a side facing away from the first notch; a second conducting groove is provided on the outer conductive member at a position facing the second notch; wherein the inner conductive member is at least partially exposed in the second conducting groove.

3. The electrode assembly of the shock wave guide tube according to claim 2, characterized in that: The first notch and the second notch extend along the axial direction of the inner tube; the first conducting groove and the second conducting groove extend along the axial direction of the inner tube.

4. The electrode assembly of the shock wave guide tube according to claim 1, characterized in that: The inner conductive member is bonded to the inner tube; and / or, the inner wall of the insulating layer is bonded to the inner conductive member; and / or, the outer conductive member is bonded to the insulating layer.

5. The electrode assembly of the shock wave guide tube according to claim 1, characterized in that: The first conducting groove is in a square, rectangular or semicircular shape.

6. The electrode assembly of the shock wave guide tube according to claim 1, characterized in that: There are four inner conductive members, which are arranged in sequence at intervals of 90° along the circumferential direction of the inner tube; there are four wires, which are connected to the four inner conductive members in a one-to-one correspondence; And / or, the wires include at least one positive electrode wire and at least one negative electrode wire.

7. The electrode assembly of the shock wave guide tube according to claim 1, characterized in that: An arc-shaped protrusion is protruding from the side wall of the first conducting groove.

8. The electrode assembly of the shock wave guide tube according to claim 1, characterized in that: The insulating layer is a rubber insulating layer or a polyimide insulating layer.

9. A shock wave guide tube, characterized in that: An electrode assembly comprising the shock wave guide tube according to any one of claims 1 to 8.

10. The shock wave guide according to claim 9, characterized in that The electrode assemblies are provided in a plurality of groups, and the plurality of groups of the electrode assemblies are arranged at intervals along the axial direction of the inner tube; and a connecting line is provided between two adjacent groups of the electrode assemblies.

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