Shock wave balloon catheter

Abstract

The utility model relates to a shock wave balloon catheter which comprises a balloon catheter body, the balloon catheter body is provided with a balloon body capable of being filled with fluid, the far end of the balloon catheter body is provided with an elastic end composed of a spiral spring, and the balloon catheter body is provided with a developing mark; the electrode assembly is located in the balloon body and used for discharging the fluid and driving the elastic end to move correspondingly; the multi-section plug is provided with a plurality of conducting areas which are isolated from one another in a circuit mode in the insertion direction, and the conducting areas are connected with the electrode assembly through wires; and the host is provided with a jack matched with the multi-section plug and is used for supplying power to the electrode assembly. When the balloon body is pressurized and filled, the main machine supplies power to the electrode assembly through the conducting area of the multi-section plug, the electrode assembly is discharged through the wire to break down liquid, the liquid is rapidly vaporized and expanded, shock waves are triggered, the elastic end is pushed to penetrate forwards, and the elastic end can penetrate through the chronic occlusion lesion in the blood vessel easily. The multi-section plug is adopted, and convenience and reliability of connection to a host are improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a shockwave balloon catheter. Background Technology

[0002] Currently, common methods for treating calcifications or other blockages in blood vessels, such as coronary artery calcification or atherosclerosis, include balloon angioplasty and stent implantation. However, these methods share the same drawback: physically expanding the narrowed area of ​​the blood vessel can easily cause damage to the vascular endothelium, leading to endothelial hyperplasia and increasing the risk of restenosis.

[0003] Shockwave balloon dilation catheters integrate a shockwave generator, enabling them to treat calcified or hardened plaques by generating shockwave energy within the balloon, providing an additional mechanical fragmentation effect. Traditional balloon dilation catheters offer good dilation for mild to moderate stenosis and soft plaques, but their effectiveness is limited when dealing with severely calcified plaques. Shockwave balloon dilation catheters, on the other hand, effectively treat both hardened and calcified plaques, providing more durable and thorough vascular dilation through shockwave fragmentation technology. Utility Model Content

[0004] Therefore, it is necessary to provide a shockwave balloon catheter to address the aforementioned technical problems.

[0005] The shockwave balloon catheter of this application includes:

[0006] A balloon catheter having a balloon body that can be inflated by fluid, the distal end of the balloon catheter having an elastic tip made of a helical spring, and the balloon catheter having a radiopaque marking;

[0007] An electrode assembly, located within the balloon, is used to discharge fluid and drive the elastic tip to move accordingly;

[0008] A multi-segment plug having multiple conductive areas that are electrically isolated from each other along the insertion direction, each of the conductive areas being connected to the electrode assembly via a wire;

[0009] The main unit is provided with a socket that mates with the multi-segment plug for supplying power to the electrode assembly.

[0010] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0011] Optionally, the diameter of the elastic end generally decreases from the proximal end to the distal end.

[0012] Optionally, the resilient end includes a tightly wound section at the distal end and a loosely wound section at the proximal end.

[0013] Optionally, the winding pitch of the tightly wound section is 0.01 to 0.1 mm, and the winding pitch of the loosely wound section is 0.1 to 0.5 mm.

[0014] Optionally, the axial length of the tightly wound section is 1 to 5 mm, and the axial length of the loosely wound section is 1 to 5 mm.

[0015] Optionally, the diameter of the tightly wound section is 0.30 mm to 0.60 mm, and the diameter of the loosely wound section is 0.60 mm to 0.80 mm.

[0016] Optionally, the wire diameter of the elastic end is 0.05 to 0.1 mm, and the compression stroke of the elastic end is 0.1 to 0.5 mm.

[0017] Optionally, the electrode assembly has multiple discharge sites, and the different discharge sites are arranged radially opposite each other and discharge simultaneously.

[0018] Optionally, the balloon catheter includes:

[0019] The inner tube has a guide wire channel inside, the elastic end is connected to the far end of the inner tube, and the electrode assembly is installed on the outer wall of the inner tube.

[0020] An outer tube is located outside the inner tube, and the radial gap between the inner and outer tubes forms a fluid passage.

[0021] A balloon body is located on the outer periphery of the inner tube and is sealed to the distal end of the outer tube; the interior of the balloon body is in communication with the fluid channel.

[0022] An interface element, connected to the proximal end of the outer tube, is used to supply fluid via the fluid channel and to allow the wire to extend into the balloon catheter.

[0023] Optionally, the inner tube extends proximally to the interface and the proximally end of the guidewire channel is open at the interface; or

[0024] The proximal end of the inner tube is abutted against the wall of the outer tube, and the proximal end of the guidewire channel is open to the wall of the outer tube.

[0025] Optionally, the electrode assembly includes:

[0026] A gasket is installed on the outer surface of the inner tube;

[0027] An electrode ring is installed on the outer surface of the liner, including a first electrode ring and a second electrode ring arranged along the axial direction, and each electrode ring has two discharge holes.

[0028] The transition line is coupled to different electrode rings through the discharge hole;

[0029] The wire includes:

[0030] The first wire is coupled to the first electrode ring and a conductive area corresponding to the multi-segment plug through the discharge hole;

[0031] The second wire is coupled to the second electrode ring and a conductive area corresponding to the multi-segment plug through the discharge hole.

[0032] Optionally, each of the electrode rings includes a first discharge hole and a second discharge hole;

[0033] The transition line is coupled between the second discharge hole of the first electrode ring and the first discharge hole of the second electrode ring.

[0034] The first wire is coupled to the second discharge hole of the first electrode ring;

[0035] The second wire is coupled to the first discharge hole of the second resistor ring.

[0036] Optionally, the first wire, the first electrode ring, the transition line, the second electrode ring, and the second wire are sequentially coupled through the corresponding discharge holes to form a discharge circuit;

[0037] The discharge holes of each electrode ring provide a discharge area, and the transition line, the first conductor, and the second conductor each have a discharge end that is located within the discharge area and gap-fitted with the electrode ring body to couple to the corresponding electrode ring.

[0038] Optionally, both the transition line and the conductor are inserted into the gasket along the axial direction of the inner tube and then bent to reach the discharge area, so that the discharge end is located within the discharge area.

[0039] Optionally, the shockwave balloon catheter includes a control handle connected between the interface and the multi-segment plug, the control handle having a control switch for controlling the host to supply power to the electrode assembly via wires.

[0040] Optionally, the conductive area of ​​the multi-segment plug includes:

[0041] Two electrode regions are respectively used for coupling to the electrode assembly via wires;

[0042] Grounding area, used to connect to the ground wire of the host;

[0043] The indicator light area is used to indicate the standby status of the shockwave balloon catheter;

[0044] The control area is electrically connected to the control switch and is used to receive the trigger signal from the control switch.

[0045] The shockwave balloon catheter of this application has at least the following technical advantages:

[0046] When the balloon body of this application is filled with fluid, the main unit can supply power to the electrode assembly through the conductive area of ​​the multi-segment plug, and discharge to the electrode assembly through the wire to break down the fluid, causing the fluid to undergo a hydroelectric effect, resulting in the fluid rapidly vaporizing, expanding and generating a shock wave, which pushes the elastic tip forward to penetrate, which helps the elastic tip pass through chronic occlusive lesions in blood vessels.

[0047] In this embodiment, the shockwave balloon catheter uses a multi-segment plug, which improves the convenience and reliability of connecting to the main unit. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the structure of a shockwave balloon catheter in one embodiment of this application;

[0049] Figure 2 for Figure 1 Schematic diagram of the structure of the mid-balloon catheter;

[0050] Figure 3 for Figure 1 A schematic diagram of a multi-segment plug;

[0051] Figure 4 for Figure 1 Enlarged view of section A;

[0052] Figure 5 This is a schematic diagram of the electrode assembly in a shockwave balloon catheter according to one embodiment of this application;

[0053] Figure 6 This is a schematic diagram of the assembly of the elastic end of the shockwave balloon catheter in one embodiment of this application;

[0054] Figure 7 This is a schematic diagram of the elastic end of the shockwave balloon catheter in one embodiment of this application;

[0055] Figure 8 This is a schematic diagram of the elastic end of the shockwave balloon catheter in one embodiment of this application;

[0056] The annotations in the figure are explained as follows:

[0057] 100. Balloon catheter; 130. Balloon body; 140. Fluid channel; 150. Interface piece; 160. Reinforcing member; 200. Flexible end; 210. Tightly wound section; 220. Loosely wound section; 300. Electrode assembly; 400. Multi-segment plug; 410. Conductive area; 420. Wire; 500. Main unit; 510. Socket; 600. Control handle;

[0058] 110. Inner tube; 111. First developing indicator; 120. Outer tube; 121. Opening; 122. Second developing indicator;

[0059] 310. Gasket; 320. Electrode ring; 321. First electrode ring; 322. Second electrode ring; 323. Ring wall; 330. Discharge hole; 331. First discharge hole; 332. Second discharge hole; 340. Transition line;

[0060] 421. First wire; 422. Second wire; 411. Electrode area; 412. Ground area; 413. Indicator light area; 414. Control area. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0064] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] In this application, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a system, product, or device that includes a series of units is not necessarily limited to those units that are explicitly listed, but may include other units that are not explicitly listed or that are inherent to such products or devices.

[0066] In this application, the terms "corresponding," "matching," "adapted," such as "B corresponding to A," "B corresponding to A," "A and B corresponding," or "B and A corresponding," indicate that B and A have a corresponding relationship in shape, position, or function, and that B can be determined based on A. Determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.

[0067] In the field of interventional medical device technology, the orientation closer to the operator is generally defined as proximal or proximal side, and the orientation farther from the operator is defined as distal or distal side. The direction of the rotational axis of objects such as cylinders and tubes is defined as the axial direction. Radial direction refers to the direction perpendicular to the axial direction and along the diameter or radius. Circumferential direction is the direction around the axis of objects such as cylinders and tubes (perpendicular to the axis and also perpendicular to the cross-sectional radius).

[0068] See Figures 1-3 This application provides a shockwave balloon catheter 100, including a balloon catheter 100, an electrode assembly 300, a multi-segment plug 400, and a main unit 500. The balloon catheter 100 has a balloon body 130 that can be inflated by fluid, and its distal end has an elastic tip 200 formed by a helical spring. The electrode assembly 300 is located within the balloon body 130 and is used to discharge fluid and drive the elastic tip 200 to move accordingly. The multi-segment plug 400 has multiple conductive areas 410 that are electrically isolated from each other along the insertion direction, and each conductive area 410 is connected to the electrode assembly 300 via a wire 420. The main unit 500 has a socket 510 that mates with the multi-segment plug 400 for supplying power to the electrode assembly 300.

[0069] When the balloon 130 is filled with fluid such as liquid, the host 500 can supply power to the electrode assembly 300 through the conductive area 410 of the multi-segment plug 400. The host 500 acts as an energy supply unit to provide energy to the electrode assembly 300. The liquid is discharged to the electrode assembly 300 through the wire 420, causing the liquid to undergo a hydroelectric effect, which causes the liquid to rapidly vaporize, expand and generate a shock wave, pushing the elastic end 200 forward to penetrate, which helps to pass through the chronic occlusive lesion site in the blood vessel.

[0070] In this embodiment, the shockwave balloon catheter 100 adopts a multi-segment plug 400, which improves the convenience and reliability of connecting to the host 500.

[0071] The balloon catheter 100 includes an inner tube 110, an outer tube 120, a balloon body 130, and an interface 150 connected to the proximal end of the outer tube 120. The inner tube 110 has a guidewire channel inside, an elastic end 200 connected to the distal end of the inner tube 110, and an electrode assembly 300 mounted on the outer wall of the inner tube 110. The outer tube 120 is located outside the inner tube 110, and the radial gap between the inner tube 110 and the outer tube 120 forms a fluid channel 140. The balloon body 130 is located on the outer periphery of the inner tube 110 and is sealed to the distal end of the outer tube 120; the interior of the balloon body 130 communicates with the fluid channel 140. The interface 150 is used to supply fluid via the fluid channel 140 and to allow a lead 420 to extend into the balloon catheter 100. The interface 150 may be, for example, a tee connector, with one port for fluid supply. The outer surface of the outer tube to which the interface 150 is connected is provided with a reinforcing member 160 to improve the structural strength.

[0072] See Figure 4 Regarding the fitting method of the guidewire relative to the shockwave balloon catheter 100, any of the following can be adopted: (1) The inner tube 110 extends proximally to the interface 150 and the proximal end of the guidewire channel is open at the interface 150, at which time the guidewire can enter the guidewire channel along the interface 150. (2) The proximal end of the inner tube 110 is connected to the wall of the outer tube 120, the proximal end of the guidewire channel is open at the wall of the outer tube 120, and the wall of the outer tube 120 forms an opening 121 accordingly, at which time the guidewire can enter the guidewire channel along the channel of the outer tube 120. It can be understood that at this time, on the distal side of the opening 121, the radial gap between the inner tube 110 and the outer tube 120 is the fluid channel 140. On the proximal side of the opening 121, the shockwave balloon catheter 100 only includes the outer tube 120 (excluding the inner tube 110), and the entire internal space of the outer tube 120 is used to supply fluid and to allow the guide wire 420 to extend into the balloon catheter 100.

[0073] In some embodiments, the balloon catheter 100 is provided with radiopaque markings, which include a first radiopaque marking 111 on the outer surface of the inner tube 110 in the balloon body 130 and a second radiopaque marking 122 on the wall of the outer tube 120. The radiopaque markings may be, for example, radiopaque rings.

[0074] See Figure 5 The electrode assembly 300 includes a gasket 310, an electrode ring 320, and a transition line 340. The gasket 310 is mounted on the outer surface of the inner tube 110. The electrode ring 320 is mounted on the outer surface of the gasket 310 and includes a first electrode ring 321 and a second electrode ring 322 arranged axially. Each electrode ring 320 has two discharge holes 330. The transition line 340 is coupled to different electrode rings 320 through the discharge holes 330. The two discharge holes 330 are formed on two ring walls 323 on opposite radial sides of the electrode ring 320.

[0075] The wire 420 includes a first wire 421 and a second wire 422. The first wire 421 is coupled to the first electrode ring 321 and a corresponding conductive area 410 of the multi-segment plug 400 via a discharge hole 330. The second wire 422 is coupled to the second electrode ring 322 and a corresponding conductive area 410 of the multi-segment plug 400 via a discharge hole 330.

[0076] Specifically, each electrode ring 320 includes a first discharge hole 331 and a second discharge hole 332. A transition line 340 is coupled between the second discharge hole 332 of the first electrode ring 321 and the first discharge hole 331 of the second electrode ring 322. A first wire 421 is coupled to the second discharge hole 332 of the first electrode ring 321. A second wire 422 is coupled to the first discharge hole 331 of the second resistor ring. It is understood that the above scheme does not exclude the existence of other electrode rings 320 besides the first electrode ring 321 and the second electrode ring 322. For example, if a third electrode ring 320 exists, the transition line 340 includes a first transition line 340 and a second transition line 340. The first transition line 340 is coupled between the second discharge hole 332 of the first electrode ring 321 and the first discharge hole 331 of the third electrode ring 320; the second transition line 340 is coupled between the second discharge hole 332 of the third electrode ring 320 and the first discharge hole 331 of the second electrode ring 322.

[0077] When the electrode ring 320 includes only the first electrode ring 321 and the second electrode ring 322: the first wire 421, the first electrode ring 321, the transition line 340, the second electrode ring 322, and the second wire 422 are sequentially coupled through the corresponding discharge holes 330 to form a discharge circuit.

[0078] Each electrode ring 320 has a discharge hole 330 providing a discharge zone, and the space formed by the discharge hole 330 can be considered as a discharge zone. The transition line 340, the first conductor 421, and the second conductor 422 each have a discharge end located within the discharge zone and in clearance fit with the electrode ring 320 body, to couple to the corresponding electrode ring 320. Further, the transition line 340 and conductor 420 both penetrate the liner 310 axially along the inner tube 110 and then bend to reach the discharge zone, placing the discharge end within the discharge zone. The discharge end is in clearance fit with the electrode ring 320 body, and the discharge end discharges to the electrode ring 320 through fluid. When the balloon body 130 is filled with liquid, the discharge generates a hydroelectric effect, causing the balloon catheter 100 to move, which in turn drives the elastic end to move accordingly.

[0079] In some embodiments, the electrode assembly 300 has multiple discharge sites (which can be understood as a set of electrode pairs), and different discharge sites are arranged radially opposite each other and / or axially spaced apart, and different discharge sites discharge simultaneously. When performing simultaneous discharge, different discharge sites can be respectively configured with different wires 420 and connected to the conductive area 410 of the multi-segment plug 400, and the conductive area 410 of the multi-segment plug 400 is configured accordingly.

[0080] In this embodiment, the simultaneous discharge of different discharge sites can dissipate the trapped bubbles in other discharge sites, thus avoiding the adverse effects of trapped bubbles throughout the discharge process and maintaining the continuity and stability of the shock wave energy.

[0081] In some preferred embodiments, different discharge sites are arranged radially opposite each other and at the same axial position. Simultaneous discharge of different discharge sites can provide a better movement posture for the elastic tip 200, thereby improving the puncture success rate and operational efficiency.

[0082] In some embodiments, the shockwave balloon catheter 100 includes a control handle 600 connected between an interface 150 and a multi-segment plug 400. A TPU protective tube for wrapping the lead wire is connected between the control handle 600 and the multi-segment plug. The control handle 600 has a control switch for controlling the host 500 to supply power to the electrode assembly 300 via the lead wire 420. The control switch can be manually or foot-operated to meet clinical operational needs and facilitate emergency stop during surgery.

[0083] Furthermore, the conductive area 410 of the multi-segment plug 400 includes an electrode area 411, a ground area 412, an indicator light area 413, and a control area 414. The two electrode areas 411 are respectively used to couple to the electrode assembly 300 via wires 420. The ground area 412 is used to connect to the ground wire of the main unit 500. The indicator light area 413 is used to indicate the standby state of the shock wave balloon catheter 100. The control area 414 is electrically connected to a control switch and is used to receive trigger signals from the control switch.

[0084] See Figures 6-8 The elastic end 200 includes a tightly wound section 210 at the distal end and a loosely wound section 220 at the proximal end. The winding pitch X1 of the tightly wound section 210 is 0.01–0.1 mm, and the winding pitch X2 of the loosely wound section 220 is 0.1–0.5 mm. The axial length L1 of the tightly wound section 210 is 1–5 mm, and the axial length L2 of the loosely wound section 220 is 1–5 mm. The diameter D1 of the tightly wound section 210 is 0.30 mm–0.60 mm, and the diameter D2 of the loosely wound section 220 is 0.60–0.80 mm.

[0085] The diameter of the elastic end 200 generally decreases from the proximal end to the distal end. Specifically, at least a portion of the diameter of the elastic end 200 generally decreases from the proximal end to the distal end. For example, it could be as follows: Figure 7 and Figure 8 The overall gradual extension is shown. The loosely wound section 220 of the spring end 200 can store elastic potential energy after the shock wave occurs. When the stored elastic potential is released, it can propel the tightly wound section 210 forward with penetrating force, making it easier to pass through the site of chronic occlusive disease (CTO).

[0086] Optional solutions include: (1) the elastic end 200 is a gradually decreasing diameter section from the proximal end to the distal end; (2) the elastic end 200 includes a gradually decreasing diameter section from the proximal end to the distal end and a first straight section on the distal side of the gradually decreasing section; (3) the elastic end 200 includes a gradually decreasing diameter section from the proximal end to the distal end and a second straight section on the proximal side of the gradually decreasing section; (4) the elastic end 200 includes a gradually decreasing diameter section from the proximal end to the distal end, a first straight section on the distal side of the gradually decreasing section, and a second straight section on the proximal side of the gradually decreasing section.

[0087] The blood vessels at the lesion site are usually fragile and easily damaged, requiring high flexibility of the elastic tip 200. In this embodiment, the elastic tip 200 is more compact, improving its flexibility and resistance to unwinding. When the elastic tip 200 encounters resistance, it is less likely to lose its elasticity due to unwinding deformation. By setting the tightly wound section 210 and the loosely wound section 220, and by reducing the radial dimension from the proximal end to the distal end, the overall compliance of the elastic tip 200 is improved, allowing it to better conform to the guidewire and preventing the fish-mouth effect when passing through tortuous lesions.

[0088] Furthermore, the flexible tip 200 is formed by winding a metal wire or a metal flat strip, such as a helical spring. The wire diameter of the flexible tip is 0.05–0.1 mm. When a metal flat strip is used, the wire diameter is calculated based on the diameter of a circle with an equal cross-sectional area. The compression stroke of the flexible tip is 0.1–0.5 mm, where the compression stroke refers to the stroke generated by compressing two adjacent turns of the metal wire or metal flat strip. The flexible tip can be made of SUS304 or SUS316 material. The wound end face of the flexible tip 200 is smoothed to avoid damage to blood vessels after the balloon catheter 100 enters the body. Sharpening methods include, for example, laser welding, mechanical grinding, and sandblasting.

[0089] The arrangement of the tightly wound section 210 and the loosely wound section 220 can further combine multiple discharge points, so that the axial deformation potential energy of the elastic end 200 and the swinging motion can work together.

[0090] In some embodiments, the liner 310 is a liner ring with a radial dimension of 0.01–1 mm. The number and position of the liner rings are adapted to the corresponding arrangement of the electrode ring 320. The liner ring and the balloon catheter 100 can be made of Pebax, nylon, polyimide, or PTFE to ensure the durability of the balloon body 130, including withstanding high pressure and repeated electrohydraulic excitation. The liner ring and the inner tube 110 can be integrally formed, or the liner ring and the inner tube can be thermoformed. The electrode ring 320 can be made of metal, conductive adhesive, or a mixture of acrylate monomers, wherein the metal is preferably stainless steel, platinum-iridium alloy, copper, or silver. The conductor 420 and the transition line 340 are insulated wires, including an internal metal wire or metal tube and a polymer insulating coating layer, to further optimize the transmission frequency of the shock wave energy, shorten the pulse frequency, and increase the energy.

[0091] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0092] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A shockwave balloon catheter, characterized in that, include: A balloon catheter having a balloon body that can be inflated by fluid, the distal end of the balloon catheter having an elastic tip made of a helical spring, and the balloon catheter having a radiopaque marking; An electrode assembly, located within the balloon, is used to discharge fluid and drive the elastic tip to move accordingly; A multi-segment plug having multiple conductive areas that are electrically isolated from each other along the insertion direction, each of the conductive areas being connected to the electrode assembly via a wire; The main unit is provided with a socket that mates with the multi-segment plug for supplying power to the electrode assembly.

2. The shockwave balloon catheter as described in claim 1, characterized in that, The diameter of the elastic end generally decreases from the proximal end to the distal end.

3. The shockwave balloon catheter as described in claim 2, characterized in that, The elastic end includes a tightly wound section at the distal end and a loosely wound section at the proximal end.

4. The shockwave balloon catheter as described in claim 3, characterized in that, The winding pitch of the tightly wound section is 0.01 to 0.1 mm, the winding pitch of the loosely wound section is 0.1 to 0.5 mm, the axial length of the tightly wound section is 1 to 5 mm, and the axial length of the loosely wound section is 1 to 5 mm.

5. The shockwave balloon catheter as described in claim 3, characterized in that, The diameter of the tightly wound section is 0.30 mm to 0.60 mm, and the diameter of the loosely wound section is 0.60 mm to 0.80 mm.

6. The shockwave balloon catheter as described in claim 3, characterized in that, The wire diameter of the elastic end is 0.05 to 0.1 mm, and the compression stroke of the elastic end is 0.1 to 0.5 mm.

7. The shockwave balloon catheter as described in claim 3, characterized in that, The electrode assembly has multiple discharge sites, and the different discharge sites are arranged radially opposite each other.

8. The shockwave balloon catheter as described in claim 1, characterized in that, The balloon catheter includes: The inner tube has a guide wire channel inside, the elastic end is connected to the far end of the inner tube, and the electrode assembly is installed on the outer wall of the inner tube. An outer tube is located outside the inner tube, and the radial gap between the inner and outer tubes forms a fluid passage. A balloon body is located on the outer periphery of the inner tube and is sealed to the distal end of the outer tube; the interior of the balloon body is in communication with the fluid channel. An interface element, connected to the proximal end of the outer tube, is used to supply fluid via the fluid channel and to allow the wire to extend into the balloon catheter; The inner tube extends proximally to the interface and the proximally end of the guidewire channel opens into the interface; or The proximal end of the inner tube is abutted against the wall of the outer tube, and the proximal end of the guidewire channel is open to the wall of the outer tube.

9. The shockwave balloon catheter as described in claim 8, characterized in that, The electrode assembly includes: A gasket is installed on the outer surface of the inner tube; An electrode ring is installed on the outer surface of the liner, including a first electrode ring and a second electrode ring arranged along the axial direction, and each electrode ring has two discharge holes. The transition line is coupled to different electrode rings through the discharge hole; The wire includes: The first wire is coupled to the first electrode ring and a conductive area corresponding to the multi-segment plug through the discharge hole; The second wire is coupled to the second electrode ring and a conductive area corresponding to the multi-segment plug through the discharge hole; The first conductor, the first electrode ring, the transition line, the second electrode ring, and the second conductor are sequentially coupled through the corresponding discharge holes to form a discharge circuit; The discharge holes of each electrode ring provide a discharge area, and the transition line, the first conductor, and the second conductor each have a discharge end that is located within the discharge area and gap-fitted with the electrode ring body to couple to the corresponding electrode ring.

10. The shockwave balloon catheter as described in claim 8, characterized in that, The shockwave balloon catheter includes a control handle connected between the interface and the multi-segment plug, the control handle having a control switch for controlling the host to supply power to the electrode assembly via wires; The conductive area of ​​the multi-segment plug includes: Two electrode regions are respectively used for coupling to the electrode assembly via wires; Grounding area, used to connect to the ground wire of the host; The indicator light area is used to indicate the standby status of the shockwave balloon catheter; The control area is electrically connected to the control switch and is used to receive the trigger signal from the control switch.

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