Electrode assembly and shock wave balloon

Abstract

The electrode assembly comprises at least two annular electrodes, a gap is formed between every two adjacent annular electrodes, and the annular electrodes are respectively connected with a power source. The annular electrode is configured to be capable of generating arc discharge in the gap and forming shock waves when voltage is applied, and the shock waves can be propagated in a medium around the slender component; the gap is configured to receive a conductive medium to facilitate formation of an arc discharge. The shock wave balloon aims at solving the problems that the discharge frequency of shock waves of the shock wave balloon is small, and the positioning direction of the shock waves is poor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of interventional medical instruments, and particularly relates to an electrode assembly and an impact wave balloon. BACKGROUND

[0002] Vascular calcification is a common vascular pathological manifestation, in recent years, a new technology for treating vascular calcification, intravascular shock wave lithotripsy technology, has emerged in the clinical application abroad. The basic principle of the technology is to apply high voltage pulses to the electrodes in the conductive liquid to produce breakdown discharge, and the liquid produces cavitation under the action of the electric field to form bubbles that burst instantaneously, thereby producing impact waves to crush calcified lesion tissue. When in use, the impact wave balloon is first pushed into the calcified part of the blood vessel and is expanded at low pressure to adhere to the blood vessel wall, then a high voltage pulse power source is started to produce intermittent impact waves, thereby crushing superficial and deep calcified plaques in the blood vessel, and finally the balloon is further expanded to fully expand the blood vessel lumen, achieving the purpose of treatment. SUMMARY

[0003] Through repeated experiments, it is found that the electrodes of the impact wave balloon are usually made of metal materials, and the electrodes are consumed after generating impact waves, especially after generating impact waves for multiple times. Moreover, the discharge points of the impact waves occur on the path with the smallest impedance between the electrodes.

[0004] The utility model also aims at providing an electrode assembly and an impact wave balloon to solve the problems of few times of discharge of impact waves and / or positioning direction of impact waves and / or improve wiring efficiency and / or improve the passability of the impact wave balloon.

[0005] To achieve the above-mentioned purpose, the first aspect of the present application provides an electrode assembly arranged on the outer periphery of an elongated member, which comprises at least two annular electrodes, a gap is arranged between adjacent annular electrodes, and the annular electrodes are respectively connected with a power supply.

[0006] The annular electrodes are configured to generate arc discharge in the gap and form impact waves when a voltage is applied, and the impact waves can propagate in the medium around the elongated member. The gap is configured to accommodate a conductive medium to facilitate the formation of arc discharge.

[0007] As a preferred technical solution, at least one end of at least one annular electrode is a complete circumference.

[0008] As a preferred technical solution, at least one annular electrode is configured as a closed loop structure or an open loop structure.

[0009] As a preferred technical solution, the distance between adjacent annular electrodes is 0.1-5mm.

[0010] As a preferred technical solution, at least one of the ring electrodes is provided with at least one protrusion, the protrusion is arranged at the gap between adjacent ring electrodes, and the distance between the protrusion and the adjacent ring electrode is smaller than the distance between the adjacent ring electrodes in other regions.

[0011] As a preferred technical solution, an electrode bridge is further arranged between the two adjacent ring electrodes.

[0012] At least a part of the electrode bridge is made of conductive material, and the electrode bridge has a gap with the adjacent ring electrode.

[0013] As a preferred technical solution, the electrode bridge is not connected to the power supply.

[0014] As a preferred technical solution, at least one protrusion is arranged at each end of the electrode bridge.

[0015] As a preferred technical solution, the two ends of the ring electrode adjacent to the electrode bridge are smooth.

[0016] The second aspect of the present application provides an electrode assembly arranged on the outer periphery of an elongated member, the electrode assembly comprising at least two axially arranged ring electrodes, wherein the ring electrodes are in a closed ring structure or an open ring structure, and wherein a gap is arranged between two adjacent ring electrodes; at least one end of at least one ring electrode is a complete circumference.

[0017] At least one electrode bridge is arranged between the adjacent ring electrodes, at least a part of the electrode bridge is made of conductive material, and the electrode bridge has a gap with the adjacent ring electrode.

[0018] As a preferred technical solution, at least one of the ring electrodes is provided with at least one protrusion, the protrusion is arranged at the gap between adjacent ring electrodes, and the distance between the protrusion and the adjacent ring electrode is smaller than the distance between the adjacent ring electrodes in other regions.

[0019] As a preferred technical solution, the ring electrodes comprise a first ring electrode and a second ring electrode, and a gap is arranged between the first ring electrode and the second ring electrode.

[0020] At least one protrusion is arranged at at least one of the first ring electrode and the second ring electrode, and the protrusion is arranged at the edge adjacent to the other ring electrode.

[0021] As a preferred technical solution, a plurality of protrusions are arranged circumferentially on the first ring electrode, and the adjacent protrusions are arranged at equal distances or unequal distances; or a plurality of protrusions are arranged circumferentially on the second ring electrode, and the adjacent protrusions are arranged at equal distances or unequal distances.

[0022] As a preferred technical solution, the first annular electrode and the second annular electrode are each provided with a protruding part, circumferentially adjacent protruding parts are equidistant and / or non-equidistant, and axially adjacent protruding parts are oppositely arranged and / or staggered.

[0023] As a preferred technical solution, at least one end of the at least one electrode bridge is a smooth circumference.

[0024] Or at least one end of the at least one electrode bridge is provided with a protruding part.

[0025] Or at least one end of the electrode bridge is provided with at least one protruding part, and at least one end of the adjacent annular electrode is smooth.

[0026] As a preferred technical solution, the electrode bridge includes a first electrode bridge, the first electrode bridge is provided with a plurality of protruding parts, the protruding parts are arranged on the opposite side of the first electrode bridge and the first annular electrode, and / or the protruding parts are arranged on the opposite side of the first electrode bridge and the second annular electrode.

[0027] As a preferred technical solution, circumferentially adjacent protruding parts are equidistant and / or non-equidistant.

[0028] When both sides of the first electrode bridge are provided with protruding parts, axially adjacent protruding parts are staggered and / or axially arranged.

[0029] As a preferred technical solution, both ends of the electrode bridge are provided with at least one protruding part, and both ends of the adjacent annular electrode are smooth.

[0030] As a preferred technical solution, the electrode bridge includes a first electrode bridge and a second electrode bridge, the second electrode bridge is arranged adjacent to the first electrode bridge, and a gap is arranged between the second electrode bridge and the first electrode bridge and between the second electrode bridge and the second annular electrode.

[0031] The third aspect of the utility model provides a shock wave balloon, including the elongated member for entering the pipeline of human body, the far end of elongated member is one end for entering human body, the far end of elongated member is provided with the electrode assembly described in any one of the above.

[0032] The fourth aspect of the utility model provides the application of the above shock wave generating device and / or shock wave balloon in treating blood vessel calcification and / or biological cavity stone.

[0033] The above-mentioned blood vessel calcification includes one or more of peripheral blood vessel calcification, coronary artery blood vessel calcification, carotid artery blood vessel calcification, intracranial artery calcification, aortic arch calcification and valve calcification.

[0034] The fifth aspect of the utility model provides the application of the above shock wave generating device and / or shock wave balloon in treating stent poor adhesion.

[0035] The stents include one or more of a digestive tract stent, a blood vessel stent, a urinary system stent, an otolaryngology stent, a genital system stent, and a respiratory system stent.

[0036] An interventional physician finds that a blood vessel stent is poorly attached to a blood vessel wall through imaging means such as imaging, OCT, IVUS, etc.

[0037] The shock wave generating device and / or the shock wave balloon can be applied to the application of the digestive tract stent, the urinary system stent, the otolaryngology stent, the genital system stent, and the respiratory system stent, and so on.

[0038] The utility model discloses an electrode assembly and a shock wave balloon, which are used for solving the problems of few discharge times of the shock wave and / or the positioning direction of the shock wave and / or improving the wiring efficiency and / or improving the passability of the shock wave balloon.

[0039] To achieve the above object, the utility model provides an electrode assembly, which is arranged on the outer periphery of an elongated member, and comprises at least two axially arranged ring electrodes, wherein the ring electrodes are in a closed ring structure or an open ring structure, at least one end of at least one ring electrode is a complete circumference, at least one electrode bridge is arranged between adjacent ring electrodes, at least a part of the electrode bridge is made of a conductive material, the electrode bridge has a gap with adjacent ring electrodes, and the electrode bridge is not connected to a wire.

[0040] As a preferred technical solution, the electrode bridge has one protrusion at each end.

[0041] As a preferred technical solution, one end of the electrode bridge adjacent to the first ring electrode and the second ring electrode is a smooth circumference.

[0042] The utility model discloses an electrode assembly and a shock wave balloon, which are used for solving the problems of few discharge times of the shock wave and / or the positioning direction of the shock wave and / or improving the wiring efficiency and / or improving the passability of the shock wave balloon.

[0043] To achieve the above object, the utility model provides another aspect provides a kind of electrode assembly, be arranged to the outer periphery of elongated member, electrode assembly includes at least two axially arranged ring electrodes, wherein ring electrode is closed ring structure or open loop structure, wherein, gap is equipped between two adjacent ring electrodes;At least one end of at least one ring electrode is a complete circumference;At least one electrode bridge is equipped between adjacent ring electrodes, and electrode bridge is at least partially made of conductive material, and electrode bridge has gap between adjacent ring electrodes respectively;Two ends of the electrode bridge each have a protrusion.

[0044] As preferred technical solutions, the two protrusions are 180 degrees opposite.

[0045] As preferred technical solutions, the electrode bridge is not connected to a wire.

[0046] As preferred technical solutions, the first ring electrode and the second ring electrode have a smooth circumference adjacent to one end of the electrode bridge.

[0047] The electrode assembly provided by the utility model embodiment can be applied to a shock wave balloon, the electrode assembly is composed of multiple ring electrodes, the multiple ring electrodes are arranged to the outer periphery of an elongated member and are bonded by an adhesive, at least one protruding portion is arranged at the gap between the ring electrodes and / or the electrode bridge, and the gap between the protruding portion and the adjacent ring electrode is smaller than the gap at other positions between the ring electrodes. That is, the gap between the protruding portion and the adjacent ring electrode is the smallest and is smaller than the gap between the normal two ring electrodes. Since the gap between the protruding portion and the ring electrode is smaller than the gap between the ring electrode and the ring electrode, the position of generating the shock wave is at the protruding portion, and a certain consumption of the electrode occurs once the shock wave occurs. Therefore, the gap of the protruding portion generating the shock wave is slightly larger, so that the shock wave is generated at one protruding portion each time and the next shock wave is generated at another protruding portion. In this way, the position of generating the shock wave can be circulated, that is, the position of generating the shock wave is controllable, and the damage of the protruding portion caused by the shock wave can be evenly distributed. Therefore, the electrode assembly can generate multiple shock waves in one operation, ensures the stability and durability of the electrode assembly, and makes the shock wave balloon safer.

[0048] Meanwhile, the protruding portion as the generation point of the shock wave avoids the occurrence of the shock wave phenomenon at the welding point of the wire and the ring electrode, so that the wire connection is more stable.

[0049] The protruding portion arranged at the gap between the ring electrode and / or the electrode bridge can guide the direction of the shock wave, so that the propagation of the shock wave in the balloon is evenly distributed in two or more directions.

[0050] The above and other objects, advantages and features of the present application will become more apparent after a reading of the following detailed description of the embodiments thereof, given simply by way of illustration to provide a broadad understanding of the principles of the application, the present application being construed as being limited only by the patent claims. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows, which form a part of the present application. The illustrative embodiments of the present application and the description and explanation thereof do not constitute an improper limitation on the present application. In the drawings:

[0052] Figure 1 is a schematic view of a shock wave balloon in the embodiments of the present application;

[0053] Figure 2 is a schematic view of an electrode assembly in the shock wave balloon in the embodiments of the present application;

[0054] Figure 3 is a schematic view of an electrode assembly in the shock wave balloon in the embodiments of the present application;

[0055] Figure 4 is a schematic view of an electrode assembly in the shock wave balloon in the embodiments of the present application;

[0056] Figure 5 is a schematic view of an electrode assembly in the embodiments of the present application;

[0057] Figure 6 is a schematic view of an electrode assembly in the embodiments of the present application;

[0058] Figure 7 is a schematic view of a preferred electrode assembly in the embodiments of the present application;

[0059] Figure 8 is a schematic view of an electrode assembly in the embodiments of the present application;

[0060] Figure 9 is a schematic view of an electrode assembly in the embodiments of the present application;

[0061] Figure 10 is a schematic view of an electrode assembly in the embodiments of the present application;

[0062] Figure 11 is a schematic view of an electrode assembly in the embodiments of the present application;

[0063] Figure 12 is a schematic view of an electrode assembly in the embodiments of the present application;

[0064] Figure 13 is a schematic view of an electrode assembly in the embodiments of the present application;

[0065] Figure 14 is a schematic view of the protruding part in the embodiment of the present application.

[0066] Explanation of reference signs:

[0067] Catheter 10, proximal end 11, visualization ring 12, positive electrode wire 13, negative electrode wire 14, distal end 20, electrode assembly 30, protruding part 301, conductive material 302, non-conductive material 303, first ring electrode 31, second ring electrode 32, first electrode bridge 33, second electrode bridge 34. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with specific embodiments of the present application and corresponding drawings. In the description of the present application, it should be noted that the term "or" is generally used in the sense of including "and / or", unless the context clearly indicates otherwise.

[0069] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0070] In the field of interventional medical devices, the position close to the operator is defined as the proximal end, and the position away from the operator is defined as the distal end. The direction of the central axis of a column, a tube and the like is defined as the axial direction. The radial direction is the direction in the radial plane through the central axis, for example, the linear direction along the diameter or radius, or the linear direction perpendicular to the central axis.

[0071] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0072] To solve the problems existing in the prior art, the embodiment of the present application provides an electrode assembly, which is arranged on the outer periphery of an elongated member, and is used for generating shock waves, the elongated member is preferably configured as a catheter 10, such as Figure 1 ,Figure 8 The catheter 10 is delivered into the human body through a blood vessel, and during the operation, the proximal end 11 of the catheter 10 is outside the body, preferably provided with a handle, and connected with a power supply, and the operator controls the catheter 10 through the handle to make the distal end 20 of the catheter 10 enter the human body.

[0073] Preferably, the electrode assembly 30 comprises at least two ring electrodes, which are defined as a first ring electrode 31 and a second ring electrode 32 respectively, and a gap is arranged between the first ring electrode 31 and the second ring electrode 32. Figure 8 The first ring electrode 31 and the second ring electrode 32 are respectively connected with a power supply, and a gap is arranged between the two ring electrodes, and when the ring electrodes are applied with a voltage, an arc discharge can be generated in the adjacent gap and an impact wave can be formed, and the impact wave can propagate in the medium around the catheter 10; and the gap between the first ring electrode 31 and the second ring electrode 32 contains a conductive medium, such as physiological saline, to facilitate the formation of arc discharge.

[0074] Preferably, the gap between the first ring electrode 31 and the second ring electrode 32 is configured to be 0.1-5mm.

[0075] In a preferred embodiment, at least one end of at least one ring electrode is a complete circumference; preferably, the circumferential surface is perpendicular to the axis of the ring electrode, and the other end can be configured as a circumferential surface with an included angle with the axis of the ring electrode, which is not a right angle, at this time, the other end of the ring electrode is a bevel, or both ends of the ring electrode are configured as a complete circumference.

[0076] In another preferred embodiment, at least one ring electrode is configured as a closed loop structure or an open loop structure, and when the ring electrode is configured as an open loop structure, the opening positions of adjacent ring electrodes can be correspondingly arranged or staggered, which is not specifically limited here.

[0077] Referring to Figure 1 and Figure 9 In a preferred embodiment, the first ring electrode 31 is provided with at least one protrusion 301 on the edge adjacent to the second ring electrode 32, or the second ring electrode 32 is provided with at least one protrusion 301 on the edge adjacent to the first ring electrode 31, and the distance between the protrusion 301 and the adjacent ring electrode is smaller than the distance between other regions of the two ring electrodes, and at this time, one of the two ring electrodes is connected with the positive electrode wire 13, and the other is connected with the negative electrode wire 14.

[0078] In a preferred embodiment, the first ring electrode 31 is connected with the positive electrode wire 13, the second ring electrode 32 is connected with the negative electrode wire 14, the protruding part 301 of the first ring electrode 31 has a smaller gap with the second ring electrode 32 than the other areas between the two ring electrodes, when the first ring electrode 31 is electrified, the current enters the first ring electrode 31 from the positive electrode, and the shock wave is generated at the protruding part 301, then the current enters the second ring electrode 32, the protruding part 301 is the generation point of the shock wave, so that the generation point of the shock wave can be predicted.

[0079] In a preferred embodiment, the protruding part 301 can be provided with one or more according to actual needs, when provided with multiple, the shock wave generated each time can occur in different protruding parts 301 in turn, so as to reduce the loss of a certain protruding part 301. When a certain ring electrode is provided with multiple protruding parts 301, the adjacent protruding parts 301 can be equidistant or not equidistant, which is not limited in this embodiment.

[0080] In a preferred embodiment, the electrode assembly further comprises an electrode bridge, at least part of the electrode bridge is a conductive material, and the electrode bridge is arranged between two adjacent ring electrodes. For the convenience of description, the electrode bridge arranged between the first ring electrode 31 and the second ring electrode 32 is defined as the first electrode bridge 33, as shown in the following figure. Figure 7 .

[0081] Preferably, the first electrode bridge 33 is provided with a gap between the first ring electrode 31 and the second ring electrode 32 respectively, the first ring electrode 31 is connected with the positive electrode wire 13, the second ring electrode 32 is connected with the negative electrode wire 14, and the first electrode bridge 33 is not connected with the wire, which reduces the cumbersome process of wiring without affecting the discharge of the shock wave.

[0082] In a preferred embodiment, both ends of the first electrode bridge 33 are provided with at least one protruding part 301, one end of the first ring electrode 31 adjacent to the first electrode bridge 33 and one end of the second ring electrode 32 adjacent to the first electrode bridge 33 are smooth, that is, no protruding part 301 is arranged on the first ring electrode 31 and the second ring electrode 32.

[0083] In another preferred embodiment, the first ring electrode 31 and the second ring electrode 32 are provided with protruding parts 301 at the edges adjacent to the first electrode bridge 33, the first electrode bridge 33 plays a role of bridge in the middle, and the shock wave is generated at the protruding part 301. Specifically, the protruding part 301 arranged on the first ring electrode 31 can correspond to the protruding part 301 arranged on the first electrode bridge 33, or can not correspond; the protruding part 301 arranged on the second ring electrode 32 can correspond to the protruding part 301 arranged on the first electrode bridge 33, or can not correspond.

[0084] The utility model further provides a kind of Shockwave balloon, the Shockwave balloon includes the elongated member for entering human body pipe and above-mentioned electrode assembly.

[0085] Further, the utility model embodiment provides a kind of Shockwave balloon, such as Figure 1 Shockwave balloon includes the elongated member for entering human body pipe, and in a preferred embodiment, the elongated member is catheter 10, is transported into human body by blood vessel, and in operation, the proximal end 11 of catheter 10 is outside the body, preferably provided with handle, and is connected with power supply, and operator controls catheter 10 by handle, to make its distal end 20 enter human body.

[0086] Preferably, catheter 10 is flexible multi-lumen tube, and its distal end 20 is provided with balloon, and the internal lumen of catheter 10 is used to be provided with guide wire, and the passage between bottom lumen and external lumen is used to perfuse fluid, to make balloon inflate. Preferably, balloon has two states of collapse and inflation, and is in collapsed state when being transported in human body, and can be inflated by the perfusion of contrast agent after reaching lesion, and is developed in imaging system.

[0087] Preferably, the axial both ends of balloon are equipped with developing ring 12, to facilitate doctor to determine the actual position of balloon in medical imaging system.

[0088] Preferably, since patient has different age, gender, height, weight, lesion position and lesion condition etc., to guarantee that balloon and lesion can be well fitted to play a role, the specific specification size of catheter 10 and balloon can be adaptively adjusted or selected according to actual situation, which is not limited here.

[0089] In a preferred embodiment, the material of catheter 10 and balloon can select any material disclosed in prior art, which is not specifically limited here.

[0090] Preferably, electrode assembly 30 is arranged in the region of catheter 10 covered by balloon, and electrode assembly 30 covers the outer periphery of catheter.

[0091] Preferably, electrode assembly 30 is made of high-melting-point alloy, which can maintain its stability under the instantaneous high-temperature environment in the process of generating high-voltage pulse and breakdown discharge, and is not easy to melt or deform, to ensure the structural integrity and normal function of electrode assembly 30, and at the same time, high-melting-point alloy generally also has good conductivity, can effectively conduct high-voltage pulse current, to ensure the generation and transmission efficiency of Shockwave.

[0092] Optionally, the electrode assembly 30 can be made of tungsten, tungsten alloy, rhenium, rhenium alloy, tantalum, tantalum alloy, molybdenum, molybdenum alloy, iridium, iridium alloy, niobium, niobium alloy, titanium, titanium alloy, high-entropy alloy, iron-based superalloy, nickel-based superalloy, intermetallic compound or refractory metal alloy. The specific components of the material are not limited in the present embodiment, and can be flexibly adjusted by those skilled in the art as needed.

[0093] In a preferred embodiment, the electrode assembly 30 comprises at least two ring electrodes, which can be in a closed ring structure or an open ring structure. When the ring electrodes are configured in an open ring structure, the opening positions of adjacent ring electrodes can be correspondingly arranged or staggered. Preferably, the ring electrodes comprise at least a first ring electrode 31 and a second ring electrode 32, and a gap is arranged between the first ring electrode 31 and the second ring electrode 32.

[0094] In a preferred embodiment, at least one end of at least one ring electrode is a complete circumference, and the circumferential surface is perpendicular to the axis of the ring electrode. The other end can be configured as a circumferential surface having an included angle with the axis of the ring electrode, which is not a right angle. At this time, the other end of the ring electrode is a bevel, as shown in Figure 5 and Figure 6 Alternatively, both ends of the ring electrode are configured as a complete circumference.

[0095] In a preferred embodiment, the first ring electrode 31 is provided with at least one protrusion 301 on the side adjacent to the second ring electrode 32, or the second ring electrode 32 is provided with at least one protrusion 301 on the side adjacent to the first ring electrode 31. The first ring electrode 31 is connected to the positive electrode wire 13, and the second ring electrode 32 is connected to the negative electrode wire 14. The wires and the ring electrodes are connected by welding. The ring electrodes can be conductive. The gap between the protrusion 301 of the first ring electrode 31 and the second ring electrode 32 is smaller than the gap between other regions of the two ring electrodes. When the first ring electrode 31 is powered, the current enters the first ring electrode 31 from the positive electrode, and an impact wave is generated at the protrusion 301. Then, the current enters the second ring electrode 32. The protrusion 301 is the point of impact wave generation, so that the point of impact wave generation can be predicted. The protrusion 301 is preferably provided with a plurality of protrusions, and each time an impact wave is generated, it is generated in different protrusions 301 in sequence, so as to reduce the loss of the protrusion 301.

[0096] In a preferred embodiment, the protrusions 301 are correspondingly arranged on the first ring electrode 31 and the second ring electrode 32, and the protrusions 301 arranged on each ring electrode can be arranged equidistantly or unequidistantly in the circumferential direction, and the protrusions 301 between the first ring electrode 31 and the second ring electrode 32 can be arranged oppositely or staggeredly, that is, the direction distribution of each pair of oppositely arranged protrusions 301 in the circumferential direction can be adjusted according to requirements. Since the protrusions 301 have large structural surface curvature, the local electric field around the protrusions 301 can be significantly enhanced, and meanwhile, the gap between the protrusions 301 is the shortest, and it is easier to produce discharge breakdown, so that the conductive liquid between the protrusions 301 is ionized to produce discharge, and then an impact wave is generated. By adjusting the direction distribution of the plurality of pairs of protrusions 301 in the circumferential direction, the impact wave emitted by each group of series-discharged ring electrodes in multiple directions can be clearly controlled, the efficiency of impact wave emission is improved, and the treatment effect of the impact wave is better.

[0097] In a preferred embodiment, the protrusions 301 are arranged only on the first ring electrode 31, and the protrusions 301 are arranged on the edge adjacent to the second ring electrode 32. In this case, even if the protrusions 301 are arranged only on one ring electrode, the distance between the protrusions 301 and the other ring electrode can be reduced, and discharge at the protrusions 301 can be realized. Alternatively, the protrusions 301 on the first ring electrode 31 can be arranged equidistantly or unequidistantly in the circumferential direction, and the number of the protrusions 301 is not specifically limited in this embodiment, and one or more protrusions 301 can be arranged according to requirements.

[0098] In another preferred embodiment, the protrusions 301 are arranged only on the second ring electrode 32, and the protrusions 301 are arranged on the edge adjacent to the first ring electrode 31. In this case, even if the protrusions 301 are arranged only on one ring electrode, the distance between the protrusions 301 and the other ring electrode can be reduced, and discharge at the protrusions 301 can be realized. Alternatively, the protrusions 301 on the second ring electrode 32 can be arranged equidistantly or unequidistantly in the circumferential direction, and the number of the protrusions 301 is not specifically limited in this embodiment, and one or more protrusions 301 can be arranged according to requirements.

[0099] As Figure 2As shown, in a preferred embodiment, the annular electrode is provided with at least a first annular electrode 31, a second annular electrode 32 and a first electrode bridge 33, the first electrode bridge 33 is made of at least a conductive material 302, the first electrode bridge 33 is arranged in the gap between the first annular electrode 31 and the second annular electrode 32, and the first electrode bridge 33 is provided with a gap between the first annular electrode 31 and the second annular electrode 32 respectively; preferably, the first annular electrode 31 is connected with the positive electrode wire 13, the second annular electrode 32 is connected with the negative electrode wire 14, and the first electrode bridge 33 is not connected with the electrode wire. The function of the first electrode bridge 33 not being connected with the electrode wire is to reduce the cumbersome process of wiring without affecting the occurrence of the discharge of the shock wave.

[0100] In a preferred embodiment, the shock wave is generated in the gap between the first electrode bridge 33 and the first annular electrode 31 and the second annular electrode 32 on both sides, and the first electrode bridge 33 in the middle is not provided with a protruding part 301, but only serves as a transition in the middle, so that the current enters the second annular electrode 32 through the first electrode bridge 33 from the first annular electrode 31.

[0101] In a preferred embodiment, at least one end of the first electrode bridge 33 is a complete circle, or at least one end of the first electrode bridge is provided with a protruding part 301.

[0102] Preferably, the first annular electrode 31 and the second annular electrode 32 are provided with a protruding part 301 on the side adjacent to the first electrode bridge 33, the first electrode bridge 33 serves as a bridge in the middle, and the shock wave is generated at the protruding part 301. Since the electrode assembly itself is a very small structure, it is very difficult to install if the protruding parts 301 all correspond to each other. The middle arrangement of the first electrode bridge 33 makes the protruding parts 301 of the first annular electrode 31 and the second annular electrode 32 correspond or not correspond, which reduces the installation difficulty and cost, and has obvious practical application value.

[0103] In a preferred embodiment, the first annular electrode 31 and the second annular electrode 32 are provided with a plurality of protruding parts 301 on the side adjacent to the first electrode bridge 33, and the two ends of the first electrode bridge 33 are also provided with a plurality of protruding parts 301, the position of the protruding part 301 on one side corresponds to the protruding part 301 arranged on the first annular electrode 31, and the position of the protruding part 301 on the other side corresponds to the protruding part 301 arranged on the second annular electrode 32. In this way, there is no need to consider the alignment of the protruding parts when assembling the electrode assembly, making the installation of the electrode assembly more simple; and the middle first electrode bridge 33 is not connected with the electrode wire, so that a shock wave can be generated in two gaps of one electrode assembly, the number of electrode wires remains unchanged, the distribution of the electrode wires can be reduced, and the position of the shock wave generation is increased. Figure 3As shown, in another preferred embodiment, the electrode assembly 30 includes a first annular electrode 31, a second annular electrode 32, and a first electrode bridge 33. The first electrode bridge 33 is disposed between the first annular electrode 31 and the second annular electrode 32. Multiple protrusions 301 are provided on both sides of the first electrode bridge 33. The multiple protrusions 301 are all concentrated on one annular electrode, which simplifies the electrode structure. Since the first electrode bridge 33 is between the two annular electrodes, the current flows from the positive first annular electrode 31 through the first electrode bridge 33 and then into the second annular electrode 32. A shock wave is generated at the protrusions 301 of the first electrode bridge 33. Such an electrode can reduce the processing difficulty and manufacturing cost; at the same time, it is easy to install.

[0104] Preferably, in Figure 3 In the described embodiment, the protrusion 301 may be provided on only one side of the first electrode bridge 33, such as the side near the first annular electrode 31 or the side near the second annular electrode 32, or it may be provided on both sides. When both sides of the first electrode bridge 33 are provided with protrusions 301, the protrusions 301 provided on both sides of the first electrode bridge 33 may be provided correspondingly or staggered. The protrusions 301 provided on the same side may be provided at equal intervals in the circumferential direction or at unequal intervals in the circumferential direction.

[0105] like Figure 7 As shown, in a preferred embodiment, no protrusions 301 are provided on the first annular electrode 31 and the second annular electrode 32. Instead, a protrusion 301 is provided on both sides of the first electrode bridge 33 along its axial direction. The protrusions 301 on both sides are distributed at 180° around the circumference. One protrusion 301 generates a shock wave with the first annular electrode 31, and the other protrusion 301 generates a shock wave with the second annular electrode 32. This eliminates the need to consider the alignment of the protrusions 301 during electrode assembly, simplifying the installation of the electrode assembly. This distribution of protrusions 301 ensures more uniform shock wave generation in the circumferential direction, resulting in more uniform discharge and more uniform axial force on the calcified blood vessel, increasing the safety of the device. Furthermore, it reduces the corrosive effect of discharge on each electrode and increases the number of discharge cycles. Compared to simply providing the first annular electrode 31 and the second annular electrode 32, the additional provision of the first electrode bridge 33 offers at least the following advantages:

[0106] On the one hand, since each electrode assembly 30 consists of three electrodes: a first annular electrode 31, a second annular electrode 32, and a first electrode bridge 33, the first electrode bridge 33 is not connected to a wire, and the first annular electrode 31 and the second annular electrode 32 are connected to the positive and negative wires respectively, each electrode assembly is subjected to breakdown discharge through two gaps. Under the condition of the same pulse energy input to the power supply module, the discharge energy is localized, which can reduce the corrosive effect of discharge on the electrode, so as to facilitate more discharges and extend the service life of the electrode.

[0107] On the other hand, due to the breakdown discharge between the electrode rings, the channel most favorable to discharge is always selected, and the discharge position or direction can be intervened by structural design (such as the protrusion 301), spacing adjustment, etc. Increasing the number of gaps between the electrode rings is to increase the number of discharge channels, and by setting the protrusion 301 on the electrode ring or the electrode bridge, the discharge direction can be more effectively increased to achieve control of the discharge direction.

[0108] Reference Figure 11 In a preferred embodiment, the two ends of the first electrode bridge 33 are made of conductive material 302, and the middle part is made of non-conductive material 303.

[0109] Reference Figure 12 In another preferred embodiment, the two ends of the first electrode bridge 33 are each provided with at least one protrusion 301, the protrusions 301 at the two ends are made of conductive material 302, and the protrusions 301 at the two ends are conductively connected by conductive material 302, and the other regions are made of non-conductive material 303.

[0110] Reference Figure 13 In another embodiment, the two ends of the first electrode bridge 33 are each provided with at least one protrusion 301, the protrusions 301 at the two ends are made of conductive material 302, and the other regions are made of non-conductive material.

[0111] Regardless of the arrangement of the conductive material 302 and the non-conductive material 303 of the first electrode bridge 33, the first electrode bridge 33 is not connected to the power line.

[0112] Figures 11 to 13 The electrode bridge in the electrode assembly in the embodiment is made of a part of conductive material and a part of non-conductive material, and the non-conductive material can be selected from plastic, rubber, etc., which can increase the flexibility of the electrode and make the shock wave balloon pass better.

[0113] Reference Figure 8 — Figure 10 , Figure 8 The electrode assembly in the embodiment includes a first ring-shaped electrode 31 and a second ring-shaped electrode 32, both of which do not have protrusions 301, and the edges of the two electrode rings are smooth; Figure 9 The electrode assembly in the embodiment includes a first ring-shaped electrode 31 and a second ring-shaped electrode 32, both of which do not have protrusions 301, and the edges of the two electrode rings are smooth; Figure 10The electrode assembly in the embodiment comprises a first ring electrode 31, a second ring electrode 32, a first electrode bridge 33, and two protrusions 301 on a single electrode are symmetrically distributed at 180°, the protrusions of the first ring electrode 31 and the second ring electrode 32 are staggered at 90° and respectively face the first electrode bridge 33 in the middle. Under the same test condition (voltage 3000V), Figure 8 The electrode assembly 30 shown in the embodiment has an average discharge frequency of 200 times, a discharge energy (i.e. the maximum sound pressure of each discharge) greater than 50atm, and a single discharge direction; Figure 9 The electrode assembly 30 shown in the embodiment has an average discharge frequency of 200 times, a discharge energy greater than 50atm, and a discharge direction in two directions; Figures 10-13 The electrode assembly 30 shown in the embodiment has an average discharge frequency greater than 300 times, a discharge energy greater than 50atm, and a discharge direction in 2-4 directions; wherein Figures 11-13 The discharge direction of the electrode assembly basically follows the guiding direction of the electrode bridge, which can make the release of the shock wave more uniform and balanced, and it also needs to be noted that Figures 11-13 The electrode bridge in the embodiment is made of conductive material and / or partially made of conductive material, which has the effect of increasing the discharge frequency and guiding the discharge direction, Figures 11-13 The implementation manner of the electrode assembly is referred to the implementation manner.

[0114] As shown in Figure 4 In a preferred embodiment, the electrode assembly 30 comprises a first ring electrode 31, a second ring electrode 32, a first electrode bridge 33, and a second electrode bridge 34, the first electrode bridge 33 and the second electrode bridge 34 are arranged between the first ring electrode 31 and the second ring electrode 32, preferably, the first ring electrode 31 is connected with the positive electrode wire 13, the second ring electrode 32 is connected with the negative electrode wire 14, and the first electrode bridge 33 and the second electrode bridge 34 are not connected with the electrode wire.

[0115] In a preferred embodiment, the first ring electrode 31 and the second ring electrode 32 arranged at both ends are not provided with protrusions 301, and the first electrode bridge 33 and / or the second electrode bridge 34 arranged in the middle are provided with a plurality of protrusions 301. The protrusions 301 generate shock waves, which avoids the generation of shock waves at the welding points, thereby making the welding points more stable. Moreover, the protrusions 301 are arranged in multiple, and the shock waves are generated in different protrusions 301 in sequence each time, which can reduce the damage to the protrusions 301.

[0116] Preferably, the protrusions 301 can be arranged only on the first electrode bridge 33, at this time, the protrusions 301 can be arranged on the edge adjacent to the second electrode bridge 34, or can be arranged on the edge adjacent to the second ring electrode 32; the protrusions 301 can also be arranged only on the second electrode bridge 34, at this time, the protrusions can be arranged only on the edge adjacent to the first electrode bridge 33, or can be arranged on the edge adjacent to the first ring electrode 31.

[0117] In a preferred embodiment, when the first electrode bridge 33 and the second electrode bridge 34 are both provided with the protrusions 301, the protrusions 301 on the first electrode bridge 33 are arranged on the edge adjacent to the second ring-shaped electrode 32, the protrusions 301 on the second electrode bridge 34 are arranged on the edge adjacent to the first ring-shaped electrode 31, the axially adjacent protrusions 301 can be arranged correspondingly or staggered, and the protrusions 301 arranged on the same edge can be arranged equidistantly or unequidistantly in the circumferential direction.

[0118] In another preferred embodiment, when the first electrode bridge 33 and the second electrode bridge 34 are both provided with the protrusions 301, the protrusions 301 on the first electrode bridge 33 are arranged on the edge adjacent to the first ring-shaped electrode 31, the protrusions 301 on the second electrode bridge 34 are arranged on the edge adjacent to the second ring-shaped electrode 32, the axially adjacent protrusions 301 can be arranged correspondingly or staggered, and the protrusions 301 arranged on the same edge can be arranged equidistantly or unequidistantly in the circumferential direction.

[0119] In a preferred embodiment, the first electrode bridge 33 and the second electrode bridge 34 arranged in the middle are not provided with the protrusions 301, and the first ring-shaped electrode 31 and / or the second ring-shaped electrode 32 arranged at both ends are provided with a plurality of protrusions 301. The protrusions 301 generate shock waves, which avoids the generation of shock waves at the welding points, thereby making the welding points more stable. Moreover, the protrusions 301 are arranged in multiple, and the shock waves are generated in different protrusions 301 in sequence each time, which can reduce the damage to the protrusions 301.

[0120] In a preferred embodiment, the protrusions 301 can be arranged only on the first ring-shaped electrode 31 or only on the second ring-shaped electrode 32, and when the first ring-shaped electrode 31 and the second ring-shaped electrode 32 are both provided with the protrusions 301, the protrusions 301 on the two can be arranged correspondingly or staggered, and the protrusions 301 arranged on the same edge can be arranged equidistantly or unequidistantly in the circumferential direction.

[0121] In a preferred embodiment, the protrusions 301 are arranged on the edge of the first electrode bridge 33 adjacent to the first ring-shaped electrode 31, and the protrusions 301 are arranged on the edge of the second electrode bridge 34 adjacent to the first electrode bridge 33.

[0122] In a preferred embodiment, the protrusions 301 are arranged on the edge of the second electrode bridge 34 adjacent to the second ring-shaped electrode 32, and the protrusions 301 are arranged on the edge of the first electrode bridge 33 adjacent to the second electrode bridge 34.

[0123] In a preferred embodiment, a protrusion 301 is provided on the side of the first electrode bridge 33 adjacent to the first annular electrode 31, and a protrusion 301 is provided on the side of the second annular electrode 32 adjacent to the second electrode bridge 34.

[0124] In a preferred embodiment, a protrusion 301 is provided on the side of the first annular electrode 31 adjacent to the first electrode bridge 33, and a protrusion 301 is provided on the side of the second electrode bridge 34 adjacent to the second annular electrode 32.

[0125] Preferably, the distribution angle of the plurality of protrusions 301 can be π, π / 2, π / 3, or π / 4, etc. The protrusions 301 are evenly distributed on each annular electrode, or they can be unevenly distributed. One, two, three, or four protrusions 301 can be provided. Figure 14 As shown, the protrusion 301 can be configured in various shapes, such as fan-shaped, circular, arc-shaped, semi-circular, conical, quadrilateral, and triangular.

[0126] In some disclosed embodiments, the annular electrode in the electrode assembly 30 is made of a conductive material, such as 304 steel or 316 steel, or a metal material with imaging function, such as a platinum-iridium alloy. The annular electrode is bonded to the catheter with an adhesive. Optionally, multiple electrode assemblies 30 described above can be provided on the catheter of a shockwave balloon.

[0127] In some publicly disclosed embodiments, such as Figures 1 to 4 As shown, the gap between adjacent annular electrodes is between 0.1 and 2 mm; the gap between an annular electrode and the protrusion 301 of another annular electrode, or the gap between the protrusion 301 of one annular electrode and the protrusion 301 of another annular electrode, is smaller than the gap between the annular electrodes. Because the gap of the protrusion 301 is smaller than the gap between the annular electrodes, the shock wave is generated at the protrusion 301. Each shock wave causes some wear on the electrode, making the gap of the protrusion 301 that generates the shock wave slightly larger. Therefore, each time a shock wave is generated at one protrusion 301, the next time it is generated at another protrusion 301. This allows the location of the shock wave to be cyclical, so that the location of the shock wave is controllable and the damage to the protrusion 301 is evenly distributed. This allows the electrode assembly to generate multiple shock waves in one operation, ensuring the stability of the electrode assembly and making the shock wave balloon safer.

[0128] Specifically, in any of the above embodiments, it is no longer limited whether the electrodes in the electrode assembly 30 have the same melting point. Each electrode is preferably made of a high melting point alloy, and the melting points of different electrodes may be the same or different.

[0129] The balloon is penetrated through by a catheter, and the electrode assembly is ringed on the catheter, which is simple in structure, easy to bond, good in stability, and avoids the problems of the existing art, such as the structural through hole of the electrode pair being easy to be blocked, the shock wave being generated unevenly, and the strength being weak at times.

[0130] The above merely describes a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electrode assembly for placement around the circumference of an elongate member, characterized by, The electrode assembly comprises at least two ring electrodes, and gaps are arranged between adjacent ring electrodes, and the ring electrodes are respectively connected with a power supply; The ring electrodes are configured to generate arc discharge in the gaps and form shock waves when a voltage is applied, and the shock waves can propagate in the medium around the elongated member; the gaps are configured to accommodate conductive medium to facilitate the formation of arc discharge.

2. The electrode assembly of claim 1, wherein, At least one end of at least one of the ring electrodes is a complete circumference.

3. The electrode assembly of claim 1, wherein, At least one of the ring electrodes is configured as a closed ring structure or an open ring structure.

4. The electrode assembly of claim 1, wherein, The distance between adjacent ring electrodes is 0.1-5mm.

5. The electrode assembly of claim 1, wherein, At least one of the ring electrodes is provided with at least one protrusion, and the protrusion is arranged at the gap between adjacent ring electrodes, and the distance between the protrusion and adjacent ring electrodes is less than the distance between adjacent ring electrodes in other areas.

6. The electrode assembly of claim 5, wherein, Further comprising an electrode bridge arranged between two adjacent ring electrodes; At least a part of the electrode bridge comprises a conductive material, and the electrode bridge has a gap with adjacent ring electrodes respectively.

7. The electrode assembly of claim 6, wherein, The electrode bridge is not connected to the power supply.

8. The electrode assembly of claim 6, wherein, Both ends of the electrode bridge are provided with at least one protrusion.

9. The electrode assembly of claim 6, wherein, Both ends of the ring electrode adjacent to the electrode bridge are smooth.

10. A shockwave balloon characterized in that, The electrode assembly comprises at least two ring electrodes, and gaps are arranged between adjacent ring electrodes, and the ring electrodes are respectively connected with a power supply; The ring electrodes are configured to generate arc discharge in the gaps and form shock waves when a voltage is applied, and the shock waves can propagate in the medium around the elongated member; the gaps are configured to accommodate conductive medium to facilitate the formation of arc discharge. At least one end of at least one of the ring electrodes is a complete circumference. At least one of the ring electrodes is configured as a closed ring structure or an open ring structure. The distance between adjacent ring electrodes is 0.1-5mm. At least one of the ring electrodes is provided with at least one protrusion, and the protrusion is arranged at the gap between adjacent ring electrodes, and the distance between the protrusion and adjacent ring electrodes is less than the distance between adjacent ring electrodes in other areas. Further comprising an electrode bridge arranged between two adjacent ring electrodes; At least a part of the electrode bridge comprises a conductive material, and the electrode bridge has a gap with adjacent ring electrodes respectively. The electrode bridge is not connected to the power supply. Both ends of the electrode bridge are provided with at least one protrusion. Both ends of the ring electrode adjacent to the electrode bridge are smooth. The electrode assembly comprises at least two ring electrodes, and gaps are arranged between adjacent ring electrodes, and the ring electrodes are respectively connected with a power supply; The ring electrodes are configured to generate arc discharge in the gaps and form shock waves when a voltage is applied, and the shock waves can propagate in the medium around the elongated member; the gaps are configured to accommodate conductive medium to facilitate the formation of arc discharge. At least one end of at least one of the ring electrodes is a complete circumference. At least one of the ring electrodes is configured as a closed ring structure or an open ring structure. The distance between adjacent ring electrodes is 0.1-5mm. At least one of the ring electrodes is provided with at least one protrusion, and the protrusion is arranged at the gap between adjacent ring electrodes, and the distance between the protrusion and adjacent ring electrodes is less than the distance between adjacent ring electrodes in other areas. Further comprising an electrode bridge arranged between two adjacent ring electrodes; At least a part of the electrode bridge comprises a conductive material, and the electrode bridge has a gap with adjacent ring electrodes respectively. The electrode bridge is not connected to the power supply. Both ends of the electrode bridge are provided with at least one protrusion. Both ends of the ring electrode adjacent to the electrode bridge are smooth. The electrode assembly comprises at least two ring electrodes, and gaps are arranged between adjacent ring electrodes, and the ring electrodes are respectively connected with a power supply; The ring electrodes are configured to generate arc discharge in the gaps and form shock waves when a voltage is applied, and the shock waves can propagate in the medium around the elongated member; the gaps are configured to accommodate conductive medium to

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