CN215651394U - Catheter and shock wave generation system - Google Patents
Catheter and shock wave generation system Download PDFInfo
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- CN215651394U CN215651394U CN202121895151.XU CN202121895151U CN215651394U CN 215651394 U CN215651394 U CN 215651394U CN 202121895151 U CN202121895151 U CN 202121895151U CN 215651394 U CN215651394 U CN 215651394U
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Abstract
The utility model relates to a catheter and a shock wave generation system, wherein the catheter comprises a catheter main body, an electrode group, a first lead and a second lead, the electrode group comprises a plurality of electrodes, the electrodes are sequentially distributed along the axial direction of the catheter main body, a gap is formed between every two adjacent electrodes, the first lead is connected with the first electrode, the second lead is connected with the last electrode, an insulating layer is arranged on the surface of each electrode, a conductive opening is formed in the insulating layer, so that the exposed electrode part forms a conductive area, and the conductive areas on the two adjacent electrodes are positioned at the same position on the respective electrodes or are oppositely arranged to form an area for generating shock waves. The electrode is provided with the conductive area to generate directional oscillation waves so as to better control the area on the electrode for generating the oscillation waves; the number of connecting wires is reduced, the overall outer diameter of the catheter is reduced, the applicability of the catheter at any pathological change part is improved, the service life of the catheter is prolonged, and the cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of medical equipment, and particularly relates to a catheter and a shock wave generation system.
Background
Cardiovascular stenosis refers to the condition that lipid in blood is deposited on the originally smooth vascular intima due to abnormal lipid metabolism of human artery and vein vessels, wrapped coronary vessels, periphery, intracranial vessels and the like, lipid plaques of atheroma are gradually accumulated, and the plaques are increased and even calcified to cause the stenosis in the vascular cavity along with the time, so that the blood flow is blocked, the blood vessels and the human body at the downstream are ischemic, and the corresponding clinical manifestations are generated. If the stenosis occurs in coronary artery, palpitation, chest pain, dyspnea and angina can be caused, and serious patients can cause insufficient blood supply to cardiac muscle or cardiac muscle necrosis; if the disease occurs in the periphery, the skin epidermis temperature is reduced, the muscle is atrophied, intermittent claudication is generated, and even necrosis or amputation of the far-end limb occurs; if it occurs in the cranium, dizziness, syncope, brain tissue damage and brain dysfunction may occur.
See chinese patent CN111568500A and disclose a blood vessel recanalization system for cardiovascular stenosis, which comprises a balloon, an energy generation controller, and a catheter, wherein the catheter comprises a main tube, one end of the catheter is connected with the energy generation controller, the main tube at the other end of the catheter is connected with one end of the balloon, the balloon mainly comprises a balloon main body, an inner tube, and an electrode pair, the inner tube is arranged inside the balloon main body, and the energy generation controller can send and regulate a vibration signal with specific frequency to enable the electrode pair to generate a shock wave.
However, the electrodes of the electrode pairs in the balloon are annular, the electrodes are conductive as a whole, which means that countless points are parallel, which cannot know which area on the electrodes generates the oscillation wave, and the area generating the oscillation wave cannot be controlled.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a catheter for cardiovascular stenosis and a shock wave generation system, which are used for solving the problem that the area generating shock waves cannot be controlled.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a catheter comprises a catheter main body, an electrode group arranged on the catheter main body, a first lead and a second lead, the electrode group comprises a plurality of electrodes which are sequentially distributed along the axial direction of the catheter main body, and a gap is arranged between two adjacent electrodes, the first lead is connected with the first electrode, the second lead is connected with the tail electrodes, the surfaces of the electrodes are provided with insulating layers, the insulating layer is provided with a conductive opening so that the exposed electrode part forms a conductive area, the conductive areas on two adjacent electrodes are positioned at the same position on the respective electrodes or are oppositely arranged, and an area for generating oscillation waves is formed between the conductive areas positioned at the same position on the two adjacent electrodes or between the conductive areas oppositely arranged.
Preferably, the electrode at least partially surrounds the outer circumference of the catheter body, i.e. the electrode may be non-annularly closed, such as C-shaped, or the electrode may also be annularly shaped.
Further preferably, the electrode is ring-shaped.
Preferably, when the number of the electrodes is two, only one of the conductive regions is disposed on each of the electrodes.
Preferably, when the number of the electrodes exceeds two, only one conductive region is arranged on each of the first electrode and the last electrode, and two conductive regions are arranged on each of the middle electrodes between the first electrode and the last electrode.
Preferably, the two conductive areas 5 of the intermediate electrode are distributed along the circumference thereof at an angle greater than 0 ° and equal to or less than 180 °.
Preferably, the conductive areas on all the electrodes are distributed along the circumferential direction by more than 0 degrees and less than or equal to 180 degrees. Further preferably, the conductive areas on all the electrodes are circumferentially distributed at 90-180 °.
Preferably, the gap between two adjacent electrodes is 0.05-2 mm.
Preferably, the electrode is a tube, a spring tube or a coil, and the electrode is made of metal, conductive adhesive or graphene, wherein the metal comprises stainless steel, tungsten alloy, platinum-iridium alloy, copper, gold or silver.
Preferably, the number of the electrode groups is 1-10.
Preferably, the insulating layer is made of polyimide, ultraviolet curing glue or AB glue.
Preferably, the catheter further comprises a balloon connected to the catheter body, and the plurality of electrodes are disposed on the catheter body within the balloon.
Preferably, the first lead and the second lead are connected with the electrode through welding and/or crimping and/or bonding.
It is another object of the present invention to provide a shock wave generating system.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a shock wave generation system comprises a guide pipe and an energy generation unit, wherein the guide pipe comprises a first lead and a second lead, and the first lead and the second lead are respectively connected with the anode and the cathode of the energy generation unit.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
according to the utility model, the conducting region is arranged at the specific part of the electrode to generate the oscillating wave with specific directivity, so that the area on the electrode for generating the oscillating wave can be better controlled; the number of connecting wires is reduced, the overall outer diameter of the catheter is reduced, the applicability of the catheter at any pathological change part is improved, the service life of the catheter is prolonged, the cost is reduced, and the structure is simple and easy to realize.
Drawings
FIG. 1 is a schematic view of a catheter body and an electrode when no conductive region is disposed on the electrode;
FIG. 2 is a schematic diagram of the distribution positions of the conductive regions on the electrodes according to the first embodiment;
fig. 3 is a schematic diagram of the distribution positions of the conductive regions on the electrodes in the second embodiment;
FIG. 4 is a schematic diagram of the distribution positions of the conductive regions on the electrodes in the third embodiment;
FIG. 5 is a top sectional view of a third embodiment of the present invention showing the distribution of the conductive region on the electrode;
FIG. 6 is a schematic diagram of the distribution positions of the conductive regions on the electrodes in the fourth embodiment;
fig. 7 is a schematic diagram of the distribution positions of the conductive regions on the electrodes in the fifth embodiment.
In the above drawings:
1. catheter body, 2, electrode, 21, first electrode, 22, second electrode, 23, third electrode, 24, fourth electrode, 25, fifth electrode, 3, first lead, 4, second lead, 5, conductive area.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The catheter shown in fig. 1 to 7 comprises a catheter main body 1, an electrode group arranged on the catheter main body 1, a first lead 3 and a second lead 4, wherein the electrode group comprises a plurality of electrodes 2, the plurality of electrodes 2 are sequentially distributed along the axial direction of the catheter main body 1, a gap is formed between every two adjacent electrodes 2, the first lead 3 is connected with the first electrode, and the second lead 4 is connected with the last electrode.
Position of the electrode 2 on the catheter body 1: the electrode 2 is at least partially arranged around the periphery of the catheter main body 1, and preferably, the electrode 2 is in a ring shape, such as a circular ring, a square ring, a triangular ring or an elliptical ring, and if the electrode is in a circular ring, the diameter of the electrode 2 is slightly larger than that of the catheter main body; alternatively, the electrode 2 is non-annularly enclosed, e.g., C-shaped, in the form of a ring with a gap.
When the electrode 2 is at least partially wound around the outer circumference of the catheter main body 1, the surface of the electrode, i.e., the entire outer circumference of the electrode 2, is coated with an insulating layer.
The electrode 2 is a tube, a spring tube or a coil, the tube is made of metal materials and is sleeved on the catheter main body 1, the spring tube has elasticity, the spring tube and the coil can be completely bent along with bending of a product, the compliance is better, and the service life is longer.
In order to facilitate control and obtain an area on the electrode 2 generating an oscillating wave, the surface of the electrode 2 is provided with an insulating layer, the insulating layer is provided with a conductive opening so that the exposed electrode 2 partially forms a conductive area 5, the conductive areas 5 on two adjacent electrodes 2 are located at the same position on the respective electrodes or the conductive areas on two adjacent electrodes are oppositely arranged, an area for generating an oscillating wave is formed between the conductive areas 5 located at the same position on two adjacent electrodes 2 or the oppositely arranged conductive areas, that is, the insulating layer at the same position on two adjacent electrodes 2 or the oppositely arranged conductive areas are removed to form the conductive area 5.
Fig. 2 to 7 show that the conductive areas 5 of two adjacent electrodes 2 are located at the same position on the respective electrodes, but the conductive areas of two adjacent electrodes are oppositely arranged, which is not shown in the figures. The same position means that after a plurality of electrodes 2 are all fixed on the catheter main body, if the insulating layer is removed from one position of one electrode to form the conductive region, the insulating layer is also removed from the corresponding position of the electrode adjacent to the electrode to form the conductive region, the same positions of the two electrodes are close to each other, and the insulating layer can be removed from one circle (not the circumferential direction of the electrode) along the radial direction of the same position to form the conductive region.
The conductive areas on two adjacent electrodes are oppositely arranged, that is, the insulating layers at the opposite positions on the two adjacent electrodes are removed, so that the conductive areas oppositely arranged are formed on the two adjacent electrodes.
The electrode 2 is made of metal, conductive adhesive or graphene, wherein the metal comprises stainless steel, tungsten alloy, platinum-iridium alloy, copper, gold or silver. The insulating layer is made of polyimide, ultraviolet curing glue or AB glue. The electrodes 2 can be embedded and fixed on the catheter main body 1 by ultraviolet curing glue or AB glue, so that an insulation effect is formed among the electrodes 2, and then at the position needing to be conducted, the ultraviolet curing glue or AB glue at the position is removed to form a conductive region 5.
The principle of generating the oscillation wave is as follows: when a plurality of electrodes 2 are immersed in a conductive fluid medium, and a certain voltage is applied to the first lead 3 and the second lead 4, the conductive areas 5 between two adjacent electrodes 2 are conducted to form a loop, and a seismic wave effect is generated. The conductive fluid medium is blood or saline.
The conductive area 5 of each electrode 2 may be formed in various shapes and sizes, such as one or more of a circle, a square, and an oval.
The number of the electrodes 2 is set to two or more, and when the number of the electrodes 2 is two, only one conductive area 5 is provided on each electrode 2.
When the number of the electrodes 2 exceeds two, only one conductive area 5 is arranged on each of the first electrode and the last electrode, two conductive areas 5 are arranged on each of the middle electrodes between the first electrode and the last electrode, and a gap is formed between the two conductive areas 5. Two conductive areas 5 of each intermediate electrode are distributed along the circumferential direction at an angle of more than 0 degree and less than or equal to 180 degrees, and each intermediate electrode is not required to be connected with the first lead 3 and the second lead 4, so that the loop conduction can be realized, the structure is simplified, the number of connecting leads is reduced, the overall outer diameter of the catheter is reduced, the applicability of the catheter at any lesion part is improved, the service life of the catheter is prolonged, the cost is reduced, and the structure is simple and easy to realize.
The conductive areas 5 on all the electrodes 2 are distributed along the circumferential direction at an angle larger than 0 degree and smaller than or equal to 180 degrees, preferably at an angle of 90-180 degrees, and the conductive areas 5 on all the electrodes 2 are distributed along the circumferential direction of the catheter main body 1 at a certain angle, so that the generated shock waves have directionality, shock waves can be generated on the periphery (whole circle) of the catheter main body 1, the area generating the shock waves can be increased to act on narrow diseased blood vessels with a large area, calcified plaques are broken, and the treatment effect is improved. The conductive area 5 can be arranged according to a desired direction to generate an oscillating wave with a specific directivity at a desired directional position, so as to better control the area on the electrode 2 where the oscillating wave is generated.
In order to generate the shock wave, it is necessary to allow the arc discharge that generates the cavitation bubbles, and it is necessary to have a gap between two adjacent electrodes 2, and the gap between two adjacent electrodes 2 is preferably 0.05-2 mm.
Preferably, a plurality of electrode groups are arranged along the axial direction of the catheter main body 1, and the number of the electrode groups is 1-10 so as to act on a narrow lesion blood vessel with a large area, thus calcified plaque is cracked, and the treatment effect is improved.
The catheter also comprises a balloon connected to the catheter main body 1, a plurality of electrodes 2 are arranged on the catheter main body 1 in the balloon, a conductive fluid medium is contained in the balloon, and the plurality of electrodes 2 can be immersed in the conductive fluid medium.
The first lead 3 and the second lead 4 are made of metal wires, the metal wires are wrapped with insulating paint or insulating tubes, and the first lead 3 and the second lead 4 are connected with the electrode 2 through welding and/or crimping and/or bonding.
A shock wave generation system comprises a guide pipe and an energy generation unit, wherein the guide pipe comprises a first lead 3 and a second lead 4, the first lead 3 and the second lead 4 are respectively connected with the anode and the cathode of the energy generation unit (the first lead 3 is connected with one of the anode and the cathode of the energy generation unit, the second lead 4 is connected with the other of the anode and the cathode of the energy generation unit), and when all electrodes 2 are immersed in a conductive fluid and the energy generation unit discharges to the electrodes, conductive areas 5 on two adjacent electrodes 2 generate shock waves.
The following first to fifth examples specifically show the case where the number of electrodes is set to 2 to 6.
The first embodiment is as follows:
in the present embodiment, referring to fig. 2, the number of the electrodes 2 is two, one electrode 2 is the leading electrode, the other electrode 2 is the trailing electrode 2, only one conductive area 5 is disposed on each electrode 2, the conductive areas 5 on the two electrodes 2 are located at the same position on the respective electrodes, one electrode 2 is connected to the first lead 3, and the other electrode 2 is connected to the second lead 4 on the same circumferential side of the catheter main body 1.
Example two:
this embodiment is substantially the same as the first embodiment, except that:
in this embodiment, referring to fig. 3, the number of the electrodes 2 is three, the three electrodes are respectively a first electrode, a last electrode and a middle electrode located between the first electrode and the last electrode, wherein only one conductive area 5 is disposed on each of the first electrode and the last electrode, two conductive areas 5 are disposed on each of the middle electrodes, the conductive areas 5 on the three electrodes are circumferentially distributed at an angle of 180 °, wherein the conductive area on the first electrode and one conductive area on each of the middle electrodes are located at the same position on each of the electrodes, the other conductive area on each of the middle electrodes and the conductive area on each of the last electrodes are located at the same position on each of the electrodes, and the same position is the same circumferential side of the catheter main body 1; the first electrode 2 is connected with the first lead 3, the tail electrode 2 is connected with the second lead 4, and a middle electrode does not need to be connected with a lead.
Example three:
this embodiment is substantially the same as the first embodiment, except that:
in this embodiment, referring to fig. 4 and 5, the number of the electrodes 2 is four, the four electrodes are respectively a head electrode, a tail electrode and two intermediate electrodes located between the head electrode and the tail electrode, wherein only one conductive region 5 is disposed on each of the head electrode and the tail electrode, two conductive regions 5 are disposed on each of the two intermediate electrodes, the conductive regions 5 on the four electrodes 2 are circumferentially distributed at an angle of 120 °, one conductive region on the head electrode and one conductive region on the first intermediate electrode are located at the same position on the respective electrode, the other conductive region on the first intermediate electrode and one conductive region on the second intermediate electrode are located at the same position on the respective electrode, the other conductive region (not shown) on the second intermediate electrode and one conductive region on the tail electrode (as indicated by a in fig. 4) are located at the same position on the respective electrode, the same position here is the same circumferential side of the catheter body 1, and in fig. 4, the conductive region denoted by a is the back side in this view; the first electrode 2 is connected with the first lead 3, the tail electrode 2 is connected with the second lead 4, and two middle electrodes do not need to be connected with leads.
Example four:
this embodiment is substantially the same as the first embodiment, except that:
in this embodiment, referring to fig. 6, the number of the electrodes 2 is five, and the five electrodes 2 are respectively a head electrode, a tail electrode and three middle electrodes located between the head electrode and the tail electrode, wherein only one conductive region 5 is disposed on each of the head electrode and the tail electrode, two conductive regions 5 are disposed on each of the three middle electrodes, and the conductive regions 5 on the five electrodes are circumferentially distributed at an angle of 90 °, wherein one conductive region on the head electrode and one conductive region on the first middle electrode are located at the same position on each electrode, the other conductive region on the first middle electrode and one conductive region on the second middle electrode are located at the same position on each electrode, the other conductive region on the second middle electrode and one conductive region on the third middle electrode are located at the same position on each electrode, and the other conductive region (as indicated by a in fig. 6) on the third middle electrode and one conductive region on the tail electrode are located at the same position as one conductive region on each electrode The zones (designated by a in fig. 6) are located at the same position on the respective electrodes, where the same position is on the same circumferential side of the catheter body 1, and the conducting zone designated by a in fig. 6 is on the back side of this view; the first electrode 2 is connected with the first lead 3, the tail electrode 2 is connected with the second lead 4, and the three middle electrodes are not required to be connected with leads.
Example five:
this embodiment is substantially the same as the first embodiment, except that:
in this embodiment, referring to fig. 7, the number of the electrodes 2 is six, and the first electrode 21, the second electrode 22, the third electrode 23, the fourth electrode 24, the fifth electrode 25 and the sixth electrode 26 are sequentially arranged from left to right, the first electrode 21 is a leading electrode, the sixth electrode 26 is a trailing electrode, the second electrode 22, the third electrode 23, the fourth electrode 24 and the fifth electrode 25 are intermediate electrodes, only one conductive region 5 is arranged on each of the first electrode 21 and the sixth electrode 26, two conductive regions 5 are arranged on each of the second electrode 22, the third electrode 23, the fourth electrode 24 and the fifth electrode 25, and the conductive regions 5 on the six electrodes are circumferentially distributed at an angle of 90 °, wherein one conductive region on the first electrode 21 and one conductive region on the second electrode 22 are located at the same position on the respective electrode, the other conductive region on the second electrode 22 and one conductive region on the third electrode 23 are located at the same position on the respective electrode, the other conductive area of the third electrode 23 is located at the same position on the respective electrode as the one conductive area of the fourth electrode 24, the other conductive area of the fourth electrode 24 (as indicated by a in fig. 6) is located at the same position on the respective electrode as the one conductive area of the fifth electrode 25 (as indicated by a in fig. 6), and the other conductive area of the fifth electrode 25 is located at the same position on the respective electrode as the one conductive area of the sixth electrode 26, wherein the same positions are located on the same circumferential side of the catheter body 1. The conductive region designated by a in fig. 7 is on the back side of this view. The first electrode 21 is connected with the first lead 3, the sixth electrode 26 is connected with the second lead 4, and four intermediate electrodes do not need to be connected with leads.
The first 5 electrodes (the first electrode 21, the second electrode 22, the third electrode 23, the fourth electrode 24 and the fifth electrode 25) in fig. 7 of the fifth embodiment form a repeating unit, when the number of the electrodes exceeds six, the first 5 electrodes are the first 5 electrodes in fig. 7 of the fifth embodiment, and the subsequent electrodes are sequentially and repeatedly arranged in sequence with reference to the first 5 electrodes in fig. 7 of the fifth embodiment, for example, when the number of the electrodes is seven, the first six electrodes are arranged as the six electrodes in fig. 7, and the conductive region 5 on the seventh electrode is arranged as the conductive region 5 on the second electrode 22 in the fifth embodiment; for example, when the number of the electrodes is eight, the conductive region 5 on the eighth electrode is provided in the same manner as the conductive region 5 on the third electrode 23 in the fifth embodiment; for example, when the number of the electrodes is nine, the conductive region 5 on the ninth electrode is provided in the same manner as the conductive region 5 on the fourth electrode 24 in the fifth embodiment; for example, when the number of the electrodes is ten, the conductive region 5 on the tenth electrode is provided in the same manner as the conductive region 5 on the fifth electrode 25 in the fifth embodiment. When the number of the electrodes exceeds ten, the arrangement is repeated according to the above rule.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (14)
1. A catheter, including the catheter main part, set up in the catheter main part on electrode group, first wire and second wire, the electrode group include a plurality of electrodes, a plurality of the electrode in proper order along the axial distribution of catheter main part, and adjacent two the electrode between have the clearance, first wire with first the electrode connect, the second wire with the tail the electrode connect, its characterized in that: the surface of the electrode is provided with an insulating layer, the insulating layer is provided with a conductive opening to enable the exposed electrode part to form a conductive area, the conductive areas on two adjacent electrodes are positioned at the same position on the respective electrodes or are oppositely arranged, and an area for generating oscillation waves is formed between the conductive areas positioned at the same position on the two adjacent electrodes or between the conductive areas oppositely arranged.
2. The catheter of claim 1, wherein: the electrodes at least partially surround the outer periphery of the catheter body.
3. The catheter of claim 1, wherein: the electrode is annular.
4. A catheter as claimed in claim 2 or 3, wherein: when the number of the electrodes is two, only one conductive region is disposed on each of the electrodes.
5. A catheter as claimed in claim 2 or 3, wherein: when the number of the electrodes exceeds two, only one conductive area is arranged on the first electrode and the last electrode, and two conductive areas are arranged on each middle electrode between the first electrode and the last electrode.
6. The catheter of claim 5, wherein: the two conductive areas of the middle electrode are distributed along the circumferential direction of the middle electrode in a manner of being larger than 0 degrees and smaller than or equal to 180 degrees.
7. The catheter of claim 5, wherein: the conductive areas on all the electrodes are distributed along the circumferential direction at an angle greater than 0 DEG and less than or equal to 180 deg.
8. The catheter of claim 1, wherein: the gap between two adjacent electrodes is 0.05-2 mm.
9. The catheter of claim 1, wherein: the electrode is a tube, a spring tube or a coil, and is made of metal, conductive adhesive or graphene, wherein the metal comprises stainless steel, tungsten alloy, platinum-iridium alloy, copper, gold or silver.
10. The catheter of claim 1, wherein: the number of the electrode groups is 1-10.
11. The catheter of claim 1, wherein: the insulating layer is made of polyimide, ultraviolet curing glue or AB glue.
12. The catheter of claim 1, wherein: the catheter also comprises a balloon connected to the catheter main body, and the plurality of electrodes are arranged on the catheter main body in the balloon.
13. The catheter of claim 1, wherein: the first lead, the second lead and the electrode are connected through welding and/or crimping and/or bonding.
14. A shock wave generation system comprises a conduit and an energy generation unit, and is characterized in that: the catheter of any one of claims 1-13, wherein the first and second wires of the catheter are connected to the positive and negative electrodes of the energy generating unit, respectively.
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