Impact waveguide wire and impact waveguide wire system

Abstract

The utility model provides an impact waveguide wire and an impact waveguide wire system, the impact waveguide wire comprises a tube body and an electrode assembly arranged at the far end of the tube body, the electrode assembly comprises a first electrode, an insulating layer and a second electrode, the insulating layer is sleeved on the outer surface of the first electrode, and the second electrode is sleeved on the outer surface of the insulating layer; at least one first through hole is formed in the far end of the first electrode, at least one second through hole corresponding to the first through hole is formed in the far end of the insulating layer, and at least one third through hole corresponding to the second through hole is formed in the far end of the second electrode; at least one liquid passing cavity correspondingly communicating with the first through holes is formed in the pipe body, and the liquid passing cavity is used for conveying conductive liquid into the first through holes correspondingly formed. According to the utility model, shock waves can be emitted forwards to continuously act on intractable calcified plaques and fiber focuses at the front end, so that the intractable calcified plaques and the fiber focuses are broken, and a channel is established for subsequent expansion of a balloon and a stent.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a shock wave guide wire and a shock wave guide wire system. Background Art

[0002] Vascular calcification is a disease of vascular stenosis and hardening caused by the accumulation of plaques in human blood vessels. The so-called plaques are composed of fibrous tissue, fat and calcium. The accumulated calcified plaques hinder the normal flow of blood, resulting in insufficient supply of oxygen and nutrients to the body. Vascular calcification occurs in peripheral blood vessels and causes lower limb arteriosclerosis, which can cause lower limb coldness, numbness and intermittent claudication in mild cases, and can weaken or disappear the pulsation of the lower limb arteries, especially the dorsalis pedis artery, and even require amputation. Vascular calcification occurs in the coronary arteries, and clinical manifestations include coronary atherosclerotic heart disease, myocardial ischemia, angina pectoris, and myocardial infarction.

[0003] At present, in the interventional treatment of vascular CTO complete occlusive lesions, patients are mainly treated with angioplasty or bypass surgery. Compared with bypass surgery, angioplasty is less invasive and has gradually become a reconstruction method for severe vascular calcification lesions. However, it is very difficult to chisel open the rock-hard fibrocalcified lesions. The guide wire cannot directly pass through the hard calcified lesions, so the guide wire pierces the intima of the blood vessel wall and enters the middle membrane of the blood vessel wall. Then, balloon dilation and stent implantation are used to reconstruct the blood supply pathway under the false lumen of the intima of the blood vessel wall, bypassing the occlusive plaque in the blood vessel. However, the guide wire pierces the intima of the blood vessel wall and enters the middle membrane of the blood vessel wall, which causes greater damage to the blood vessel wall at the lesion site, and the failure rate of the operation is high.

[0004] It should be noted that the information disclosed in the background technology section of the utility model is only intended to deepen the understanding of the general background technology of the utility model, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to those skilled in the art. Utility Model Content

[0005] The utility model aims to provide a shock wave guide wire and a shock wave guide wire system, which can emit shock waves forward, continuously act on the stubborn calcified plaques and fibrous foci at the front end to break them up, and establish a channel for the subsequent expansion of balloons and stents.

[0006] To achieve the above-mentioned purpose, the utility model provides a shock wave guide wire, which includes a tube body and an electrode assembly arranged at the distal end of the tube body, the electrode assembly includes a first electrode, an insulating layer and a second electrode, the insulating layer is sleeved on the outer surface of the first electrode, the second electrode is sleeved on the outer surface of the insulating layer, and the first electrode and the second electrode are both connected to a shock wave control generator; at least one first through hole is provided at the distal end of the first electrode, at least one second through hole is provided at the distal end of the insulating layer corresponding to the first through hole, and at least one third through hole is provided at the distal end of the second electrode corresponding to the second through hole, and the correspondingly arranged first through hole, second through hole and third through hole are connected to each other; the interior of the tube body has at least one liquid passage cavity corresponding to the first through hole, and the liquid passage cavity is used to transport a conductive liquid to the first through hole corresponding to the first through hole.

[0007] Optionally, the tube body includes an outer tube and at least one liquid passing tube, the liquid passing tube is passed through the interior of the outer tube, the liquid passing cavity is located inside the liquid passing tube, the distal end of the outer tube is connected to the proximal end of the second electrode, and the distal end of the liquid passing tube extends into the first electrode and is connected to the distal end of the first electrode.

[0008] Optionally, the inner diameter and / or outer diameter of the liquid passage tube gradually increases in the direction from the distal end to the proximal end thereof.

[0009] Optionally, the liquid passage tube is made of metal, and both the outer surface and the inner surface of the liquid passage tube are provided with an insulating coating.

[0010] Optionally, the tube body further includes an inner tube passing through the outer tube, the liquid passage tube passing through the inner tube, and the distal end of the inner tube is connected to the proximal end of the first electrode.

[0011] Optionally, a plurality of first through holes are provided at the distal end of the first electrode, wherein the axis of one of the first through holes is collinearly arranged with the axis of the first electrode, and the remaining first through holes are evenly arranged along the circumference of the first electrode; a plurality of second through holes are provided at the distal end of the insulating layer, wherein the axis of one of the second through holes is collinearly arranged with the axis of the insulating layer, and the remaining second through holes are evenly arranged along the circumference of the insulating layer; a plurality of third through holes are provided at the distal end of the second electrode, wherein the axis of one of the third through holes is collinearly arranged with the axis of the second electrode, and the remaining third through holes are evenly arranged along the circumference of the second electrode.

[0012] Optionally, the first electrode includes a first convex portion and a first connecting portion connected along its distal end to the proximal end, and the first through hole is provided on the first convex portion; the insulating layer includes a second convex portion and a second connecting portion along its distal end to the proximal end, and the second through hole is provided on the second convex portion; the second electrode includes a third convex portion and a third connecting portion connected along its distal end to the proximal end, and the third through hole is provided on the third convex portion; the first convex portion, the second convex portion and the third convex portion are all arranged in a hemispherical shape.

[0013] Optionally, the outer diameter of the first connecting part is smaller than the outer diameter of the first convex part to form a first outer step surface, and the inner diameter of the first connecting part is smaller than the inner diameter of the first convex part to form a first inner step surface; the outer diameter of the second connecting part is smaller than the outer diameter of the second convex part to form a second outer step surface, and the inner diameter of the second connecting part is smaller than the inner diameter of the second convex part to form a second inner step surface; the outer diameter of the third connecting part is smaller than the outer diameter of the third convex part to form a third outer step surface, and the inner diameter of the third connecting part is smaller than the inner diameter of the third convex part to form a third inner step surface.

[0014] Optionally, the maximum diameter of the first through hole is smaller than or equal to the minimum diameter of the second through hole corresponding thereto, and the maximum diameter of the second through hole is smaller than or equal to the minimum diameter of the third through hole corresponding thereto.

[0015] Optionally, the electrode assembly further includes a first heat shrink tube coated on the inner surface of the proximal end of the first electrode and a second heat shrink tube coated on the outer surface of the proximal end of the second electrode.

[0016] Optionally, the shock wave guide wire further includes a connecting seat, and the proximal end of the tube body is connected to the connecting seat.

[0017] In order to achieve the above-mentioned object, the utility model also provides a shock wave wire guide system, which comprises a shock wave control generator and the shock wave wire guide described in any one of the above items.

[0018] Compared with the prior art, the shock wave guide wire and shock wave guide wire system provided by the utility model have the following beneficial effects:

[0019] The utility model provides a shock wave guide wire comprising a tube body and an electrode assembly arranged at the distal end of the tube body, wherein the electrode assembly comprises a first electrode, an insulating layer and a second electrode, wherein the insulating layer is sleeved on the outer surface of the first electrode, and the second electrode is sleeved on the outer surface of the insulating layer, and both the first electrode and the second electrode are connected to a shock wave control generator; at least one first through hole is arranged at the distal end of the first electrode, at least one second through hole is arranged corresponding to the first through hole is arranged at the distal end of the insulating layer, and at least one third through hole is arranged corresponding to the second through hole is arranged at the distal end of the second electrode, and the first through hole, the second through hole and the third through hole arranged correspondingly are connected to each other; the interior of the tube body has at least one liquid passage cavity corresponding to the first through hole, and the liquid passage cavity is used to transport a conductive liquid to the first through hole arranged correspondingly thereto. Therefore, in actual use, the conductive liquid (such as saline) can be transported to the first through hole through the liquid cavity and then to the second through hole and the third through hole in sequence. The shock wave control generator applies an electrical signal to the first electrode and the second electrode, so that a high potential difference is formed between the first electrode and the second electrode, thereby discharging in the circumference of the third through hole, so that the conductive liquid located at the periphery of the third through hole generates bubbles, and the plasma arc of the current is prompted to pass through the bubbles, thereby causing the bubbles to expand and collapse rapidly, and then forming a shock wave. The shock wave can apply mechanical force or pressure through the conductive liquid to continuously act on the stubborn calcified plaques and fibrous foci at the front end to break them, thereby establishing a channel for the subsequent expansion of the balloon and stent, thereby making the stenosis and even chronic total occlusion surgery related to the coronary artery and peripheral artery simpler, so that ordinary doctors can also operate it, greatly reducing the failure rate of the operation.

[0020] Since the shock wave guide wire system provided by the utility model includes the shock wave guide wire provided by the utility model, the shock wave guide wire system provided by the utility model at least has all the beneficial effects of the shock wave guide wire provided by the utility model. For details, please refer to the relevant description of the beneficial effects of the shock wave guide wire provided by the utility model in the above text, so the beneficial effects of the shock wave guide wire system provided by the utility model will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An overall cross-sectional view of the shock wave guide wire provided by the first embodiment of the utility model;

[0022] Figure 2 A partial cross-sectional view of a shock wave guide wire provided in a first embodiment of the utility model;

[0023] Figure 3 A cross-sectional view of an electrode assembly provided in a first embodiment of the utility model;

[0024] Figure 4 A cross-sectional view of an electrode assembly provided in a second embodiment of the utility model;

[0025] Figure 5 An overall cross-sectional view of the shock wave guide wire provided by the second embodiment of the utility model;

[0026] Figure 6 A partial cross-sectional view of a shock wave guide wire provided in a second embodiment of the utility model;

[0027] Figure 7 A schematic diagram of the three-dimensional structure of an electrode assembly provided in a third embodiment of the utility model;

[0028] Figure 8 This is a left side view of the electrode assembly provided in the third embodiment of the utility model.

[0029] The reference numerals are as follows:

[0030] Tube body-100; outer tube-110; liquid passage tube-120; liquid passage cavity-121; inner tube-130;

[0031] Electrode assembly-200; first electrode-210; first convex portion-211; first connecting portion-212; first through hole-2111; first outer step surface-213; first inner step surface-214; insulating layer-220; second convex portion-221; second through hole-2211; second connecting portion-222; second outer step surface-223; second inner step surface-224; second electrode-230; third convex portion-231; third through hole-2311; third connecting portion-232; third outer step surface-233; third inner step surface-234; first heat shrink tube-240; second heat shrink tube-250;

[0032] Shockwave control generator-300;

[0033] First conductor-410; second conductor-420;

[0034] Connecting seat-500; straight body-510; side body-520. DETAILED DESCRIPTION

[0035] The shock wave guide wire and shock wave guide wire system proposed by the utility model are further described in detail below in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the accompanying drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model. Any modification of the structure, change of the proportional relationship or adjustment of the size, under the same or similar conditions as the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. The specific design features of the utility model disclosed herein include, for example, specific size, direction, position and shape, which will be determined in part by the specific environment to be applied and used. Furthermore, in the embodiments described below, the same reference numerals may be used in common among different drawings to indicate the same parts or parts having the same functions, and their repeated descriptions may be omitted.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements. The singular forms "a", "an" and "the" include plural referents, the term "or" is generally used in a sense including "and / or", the term "several" is generally used in a sense including "at least one", the term "at least two" is generally used in a sense including "two or more", and the term "plurality" is generally used in a sense including "at least two".

[0037] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be a connection between the inside of two elements or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the present utility model, unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] The core idea of ​​the utility model is to provide a shock wave guide wire and a shock wave guide wire system, which can emit shock waves forward, continuously act on the stubborn calcified plaques and fibrous foci at the front end, break them up, and establish a channel for the subsequent expansion of balloons and stents. It should be noted that, as can be understood by those skilled in the art, the "proximal end" referred to herein refers to the end close to the operator, and the "distal end" refers to the end away from the operator, that is, the end close to the lesion.

[0039] In order to realize the above idea, the utility model provides a shock wave guide wire, please refer to Figures 1 to 3 ,in, Figure 1 An overall cross-sectional view of the shock wave guide wire provided by the first embodiment of the utility model;

[0040] Figure 2 A partial cross-sectional view of a shock wave guide wire provided in a first embodiment of the utility model; Figure 3This is a cross-sectional view of an electrode assembly provided in the first embodiment of the utility model. Figures 1 to 3 As shown, the shock wave guide wire provided in this embodiment includes a tube body 100 and an electrode assembly 200 arranged at the distal end of the tube body 100, the electrode assembly 200 includes a first electrode 210, an insulating layer 220 and a second electrode 230, the insulating layer 220 is sleeved on the outer surface of the first electrode 210, the second electrode 230 is sleeved on the outer surface of the insulating layer 220, the first electrode 210 and the second electrode 230 are both connected to the shock wave control generator 300; a first through hole 2111 is provided at the distal end of the first electrode 210, A second through hole 2211 corresponding to the first through hole 2111 is provided at the distal end of the insulating layer 220, and a third through hole 2311 corresponding to the second through hole 2211 is provided at the distal end of the second electrode 230, and the first through hole 2111, the second through hole 2211 and the third through hole 2311 are connected to each other; the interior of the tube body 100 has a liquid cavity 121 connected to the first through hole 2111, and the liquid cavity 121 is used to transport the conductive liquid to the first through hole 2111 corresponding to it.

[0041] Therefore, in actual use, the conductive liquid (such as saline) can be transported to the first through hole 2111 through the liquid cavity 121 and then to the second through hole 2211 and the third through hole 2311 in sequence. The shock wave control generator 300 applies an electrical signal to the first electrode 210 and the second electrode 230, so that a high potential difference is formed between the first electrode 210 and the second electrode 230, thereby discharging in the circumference of the third through hole 2311, so that the conductive liquid located at the periphery of the third through hole 2311 generates bubbles, and the plasma arc of the current is prompted to pass through the bubbles, thereby causing the bubbles to expand and collapse rapidly, and then forming a shock wave. The shock wave can apply mechanical force or pressure through the conductive liquid to continuously act on the stubborn calcified plaques and fibrous foci at the front end to break them, thereby establishing a channel for the subsequent expansion of the balloon and stent, thereby making the stenosis and even chronic total occlusion surgery related to the coronary artery and peripheral artery simpler, so that ordinary doctors can also operate it, greatly reducing the failure rate of the operation.

[0042] Specifically, the first electrode 210, the insulating layer 220 and the second electrode 230 are all hollow structures, and the materials of the first electrode 210 and the second electrode 230 can be any one or more of titanium, titanium alloy, stainless steel, tungsten steel, aluminum alloy, platinum-iridium alloy, and carbon steel. Therefore, this configuration can ensure that the electrode assembly 200 has good rigidity, so that the electrode assembly 200 can better enter the blood vessel cavity and better break up the plaque.

[0043] Preferably, the first electrode 210, the insulating layer 220 and the second electrode 230 are coaxially arranged. Thus, by coaxially arranging the first electrode 210, the insulating layer 220 and the second electrode 230, it is more conducive to the shock wave guide wire provided by the utility model to effectively emit shock waves forward and continuously act on the stubborn calcified plaques and fibrous foci at the front end to break them.

[0044] Preferably, the first through hole 2111, the second through hole 2211 and the third through hole 2311 are also coaxially arranged. Therefore, by coaxially arranging the first through hole 2111, the second through hole 2211 and the third through hole 2311, the shock wave guide wire provided by the utility model can effectively emit shock waves forward and continuously act on the stubborn calcified plaque and fibrous lesion at the front end to break them.

[0045] Furthermore, the first electrode 210 and the insulating layer 220 can be fixed by glue dispensing, and the insulating layer 220 and the second electrode 230 can also be fixed by glue dispensing. Thus, by fixing the insulating layer 220 between the first electrode 210 and the second electrode 230 by glue, the integrity of the insulating layer 220 can be ensured, and the first electrode 210 and the second electrode 230 can be effectively separated, so that the shock waveguide wire can be effectively prevented from short-circuiting during use.

[0046] Please continue to refer to Figure 1 ,like Figure 1 As shown, the first electrode 210 is connected to the shock wave control generator 300 via a first wire 410 , and the second electrode 230 is connected to the shock wave control generator 300 via a second wire 420 .

[0047] Please continue to refer to Figures 1 to 3 ,like Figures 1 to 3 As shown, in some exemplary embodiments, the axis of the first through hole 2111 is collinearly arranged with the axis of the first electrode 210, the axis of the second through hole 2211 is collinearly arranged with the axis of the insulating layer 220, and the axis of the third through hole 2311 is collinearly arranged with the axis of the second electrode 230. Thus, by arranging a first through hole 2111 at the center of the distal end of the first electrode 210, a second through hole 2211 at the center of the distal end of the insulating layer 220, and a third through hole 2311 at the center of the distal end of the second electrode 230, it can be ensured that after the shock wave guide wire is electrically connected to the shock wave control generator 300, the shock wave guide wire can emit shock waves in the forward direction, so as to smoothly break up the stubborn calcified plaque and fibrous lesion in the forward direction.

[0048] Please continue to refer to Figures 1 to 3 ,like Figures 1 to 3 As shown, in some exemplary embodiments, the tube body 100 includes an outer tube 110 and a liquid passing tube 120, the liquid passing tube 120 is passed through the interior of the outer tube 110, the liquid passing cavity 121 is located inside the liquid passing tube 120, the distal end of the outer tube 110 is connected to the proximal end of the second electrode 230, and the distal end of the liquid passing tube 120 extends into the first electrode 210 and is connected to the distal end of the first electrode 210. Therefore, by configuring the tube body 100 to include an outer tube 110 and a liquid passage tube 120, and configuring the liquid passage cavity 121 inside the liquid passage tube 120, it is convenient to arrange the first wire 410 for connecting the first electrode 210 and the shock wave control generator 300 and the second wire 420 for connecting the second electrode 230 and the shock wave control generator 300 in the channel formed between the outer tube 110 and the liquid passage tube 120. At the same time, the outer tube 110 can also achieve insulation and sealing effects, thereby further improving the safety of the shock wave guide wire during use.

[0049] Specifically, the distal end of the liquid passage tube 120 can be coaxially fixed to the first through hole 2111 by means of glue. Further, the distal end of the outer tube 110 can be connected to the proximal end of the second electrode 230 by means of glue, hot air welding, laser welding, etc.

[0050] Please continue to refer to Figures 1 to 3 ,like Figures 1 to 3 As shown, in some exemplary embodiments, the inner diameter and / or outer diameter of the liquid passage tube 120 gradually increases from the distal end to the proximal end thereof. Thus, by setting the liquid passage tube 120 as a variable diameter structure with a thin distal end and a thick proximal end, the liquid passage tube 120 can be made soft at the distal end and hard at the proximal end, thereby ensuring that the distal end of the shock waveguide has good passability, flexibility and elasticity, and the proximal end has good support and bending resistance.

[0051] In some exemplary embodiments, the material of the liquid passage tube 120 is metal, and the outer surface and the inner surface of the liquid passage tube 120 are both provided with an insulating coating. Therefore, by selecting a liquid passage tube 120 made of metal, it can be effectively ensured that the variable diameter liquid passage tube 120 has the characteristics of being soft at the distal end and hard at the proximal end. By providing an insulating coating on the outer surface and the inner surface of the liquid passage tube 120 made of metal, short circuits can be effectively avoided, further improving the safety of the shock wave guide wire during use. Specifically, the material of the liquid passage tube 120 can be selected from any one or more of stainless steel, nickel-titanium alloy, and titanium alloy.

[0052] In some exemplary embodiments, the outer tube 110 is made of a polymer material. Thus, by selecting the outer tube 110 made of a polymer material, it can be ensured that the outer tube 110 has certain flexibility, permeability, insulation and sealing properties. Specifically, the material of the outer tube 110 can be selected from any one or more of PEBAX (nylon elastomer), PA11 (nylon 11), and PA12 (nylon 12).

[0053] Please continue to refer to Figure 1 and Figure 2 ,like Figure 1 and Figure 2 As shown, in some exemplary embodiments, the outer diameter of the outer tube 110 gradually increases from the distal end to the proximal end thereof. Thus, by setting the outer tube 110 as a variable diameter structure with a thin distal end and a thick proximal end, it can be further ensured that the distal end of the shock wave guide wire has good passability, flexibility and elasticity, and the proximal end has good support and bending resistance.

[0054] Please continue to refer to Figure 3 ,like Figure 3 As shown, in some exemplary embodiments, the first electrode 210 includes a first convex portion 211 and a first connecting portion 212 connected along its distal end to the proximal end, and the first through hole 2111 is provided on the first convex portion 211; the insulating layer 220 includes a second convex portion 221 and a second connecting portion 222 along its distal end to the proximal end, and the second through hole 2211 is provided on the second convex portion 221; the second electrode 230 includes a third convex portion 231 and a third connecting portion 232 connected along its distal end to the proximal end, and the third through hole 2311 is provided on the third convex portion 231; the first convex portion 211, the second convex portion 221 and the third convex portion 231 are all arranged in a hemispherical shape. Therefore, by configuring the first electrode 210, the insulating layer 220 and the second electrode 230 to have a structure including a hemispherical convex head and a cylindrical connecting portion, the difficulty of the processing technology of the electrode assembly 200 can be effectively reduced, thereby simplifying the processing technology of the electrode assembly 200, and also making it easier to fix the electrode assembly 200 to the distal end of the tube body 100.

[0055] Please continue to refer to Figure 3 ,like Figure 3As shown, in some exemplary embodiments, the outer diameter of the first connecting portion 212 is smaller than the outer diameter of the first convex portion 211 to form a first outer step surface 213, and the inner diameter of the first connecting portion 212 is smaller than the inner diameter of the first convex portion 211 to form a first inner step surface 214; the outer diameter of the second connecting portion 222 is smaller than the outer diameter of the second convex portion 221 to form a second outer step surface 223, and the inner diameter of the second connecting portion 222 is smaller than the inner diameter of the second convex portion 221 to form a second inner step surface 224; the outer diameter of the third connecting portion 232 is smaller than the outer diameter of the third convex portion 231 to form a third outer step surface 233, and the inner diameter of the third connecting portion 232 is smaller than the inner diameter of the third convex portion 231 to form a third inner step surface 234. Thus, the first outer step surface 213 and the second inner step surface 224 that cooperate with each other can further provide a fixing position between the first electrode 210 and the insulating layer 220, thereby ensuring that the first electrode 210 and the insulating layer 220 can be more firmly connected; the second outer step surface 223 and the third inner step surface 234 that cooperate with each other can further provide a fixing position between the insulating layer 220 and the second electrode 230, thereby ensuring that the insulating layer 220 and the second electrode 230 can be more firmly connected. The third outer step surface 233 can provide a fixing position between the second electrode 230 and the outer tube 110, thereby ensuring that the second electrode 230 and the outer tube 110 can be more firmly connected. The first inner step surface 214 can provide a fixing position between the first electrode 210 and the inner tube 130 described below, thereby ensuring that the first electrode 210 and the inner tube 130 can be more firmly connected.

[0056] Please continue to refer to Figure 3 ,like Figure 3 As shown, in some exemplary embodiments, the maximum diameter of the first through hole 2111 is less than or equal to the minimum diameter of the second through hole 2211 corresponding thereto, and the maximum diameter of the second through hole 2211 is less than or equal to the minimum diameter of the third through hole 2311 corresponding thereto. Thus, by setting the minimum diameter of the third through hole 2311 to be greater than or equal to the maximum diameter of the second through hole 2211, and setting the minimum diameter of the second through hole 2211 to be greater than or equal to the maximum diameter of the first through hole 2111, it can be effectively ensured that the insulating layer 220 can separate the first electrode 210 and the second electrode 230 to avoid short circuit, so that arc discharge can be smoothly generated after the first electrode 210 and the second electrode 230 are energized.

[0057] Specifically, a circular hole can be firstly provided on the surface of the distal end of the second electrode 230, and then the insulating layer 220 can be pierced through the circular hole on the second electrode 230 by means of laser or the like to expose the first electrode 210, and then the first electrode 210 can be pierced through by means of laser or the like, so that a second through hole 2211 coaxially arranged with the circular hole (i.e., the third through hole 2311) on the second electrode 230 can be formed on the insulating layer 220, and a first through hole 2111 coaxially arranged with the second through hole 2211 on the insulating layer 220 can be formed on the first electrode 210.

[0058] Please continue to refer to Figure 1 ,like Figure 1 As shown, in some exemplary embodiments, the shock wave guide wire further includes a connection seat 500, and the proximal end of the tube body 100 is connected to the connection seat 500. Thus, by providing the connection seat 500, it is more convenient for the operator to operate the shock wave guide wire by holding the connection seat 500. Specifically, the connection seat 500 is a Y-shaped connection seat 500, and the connection seat 500 includes a connected straight body portion 510 and a side body portion 520, the outer tube 110 extends to the distal end of the straight body portion 510, the liquid passage tube 120 extends to the proximal end of the straight body portion 510, and the proximal end of the straight body portion 510 is provided with a liquid passage port (not shown in the figure), and the proximal end of the liquid passage tube 120 is connected to the liquid passage port. A first wire 410 for connecting the first electrode 210 and the shock wave control generator 300 and a second wire 420 for connecting the second electrode 230 and the shock wave control generator 300 pass through the side body 520 and are connected to the shock wave control generator 300 .

[0059] Please continue to refer to Figure 4 , which is a cross-sectional view of an electrode assembly 200 provided in a second embodiment of the present utility model. Figure 4 As shown, the electrode assembly 200 provided in this embodiment is Figure 3The difference of the electrode assembly 200 shown is that the electrode assembly 200 provided in this embodiment further includes a first heat shrink tube 240 coated on the inner surface of the proximal end of the first electrode 210 and a second heat shrink tube 250 coated on the outer surface of the proximal end of the second electrode 230. Thus, by the first heat shrink tube 240 on the inner surface of the proximal end of the first electrode 210 and the second heat shrink tube 250 coated on the outer surface of the proximal end of the second electrode 230, a certain protective effect can be played on the second electrode 230, the insulating layer 220 and the first electrode 210 located between the first heat shrink tube 240 and the second heat shrink tube 250, and the second electrode 230, the insulating layer 220 and the first electrode 210 are effectively prevented from falling off. Specifically, the first electrode 210, the insulating layer 220 and the second electrode 230 can be stacked in sequence, glued and cured, and then the first heat shrink tube 240 and the second heat shrink tube 250 are put on for heat shrinkage and fixation. It should be noted that, for more contents about the electrode assembly 200 provided in this embodiment, reference may be made to the relevant contents of the electrode assembly 200 provided in the first embodiment for adaptive understanding, and will not be elaborated herein.

[0060] Please continue to refer to Figure 5 and Figure 6 ,in, Figure 5 An overall cross-sectional view of the shock wave guide wire provided by the second embodiment of the utility model; Figure 6 A partial cross-sectional view of a shock wave guide wire provided in the second embodiment of the utility model. Figure 5 and Figure 6 As shown, the difference between the shock wave guide wire provided in this embodiment and the shock wave guide wire provided in the first embodiment is that the shock wave guide wire provided in this embodiment further includes an inner tube 130 inserted into the outer tube 110, the liquid passage tube 120 is inserted into the inner tube 130, and the distal end of the inner tube 130 is connected to the proximal end of the first electrode 210. Therefore, by arranging the inner tube 130 in the outer tube 110 and inserting the liquid passage tube 120 into the inner tube 130, not only the overall strength and wear resistance of the tube body 100 can be improved, but also the overall sealing performance of the tube body 100 can be effectively improved, and the tissue fluid in the target tissue area can be effectively prevented from entering the inside of the tube body 100.

[0061] Specifically, the distal end of the inner tube 130 and the proximal end of the first electrode 210 may be fixedly connected by gluing, hot air welding, laser welding, or the like.

[0062] In some exemplary embodiments, the inner tube 130 is a multi-layer composite tube. Thus, by selecting a multi-layer composite tube as the inner tube 130, it can be ensured that the inner tube 130 has good flexibility, passability and sealing. Specifically, the inner tube 130 can be a three-layer composite tube, and the outer layer of the inner tube 130 is made of PEBAX (nylon elastomer). Since PEBAX has good elasticity and bending properties, it is beneficial for the tube body 100 to bend and reach the target tissue area. The middle layer of the inner tube 130 can be a stainless steel braided mesh tube. Since the stainless steel braided mesh tube has high strength and good wear resistance, it is beneficial to improve the overall strength and wear resistance of the tube body 100. The inner layer of the inner tube 130 can be polytetrafluoroethylene (PTFE). Since polytetrafluoroethylene has good sealing properties, it is beneficial to improve the overall sealing performance of the tube body 100 and prevent the tissue fluid of the target tissue area from entering the inside of the tube body 100.

[0063] It should be noted that more details about the shock wave guide wire provided in the second embodiment can be adaptively understood by referring to the relevant details about the shock wave guide wire provided in the first embodiment, and will not be elaborated herein.

[0064] Please continue to refer to Figure 7 and Figure 8 ,in, Figure 7 A schematic diagram of the three-dimensional structure of an electrode assembly 200 provided in a third embodiment of the present utility model; Figure 8 This is a left side view of the electrode assembly 200 provided in the third embodiment of the present utility model. Figure 7 and Figure 8 As shown, the electrode assembly 200 provided in this embodiment is Figure 3The difference between the electrode assembly 200 shown is that, in the electrode assembly 200 provided in this embodiment, a plurality of first through holes 2111 are provided at the distal end of the first electrode 210, wherein the axis of one of the first through holes 2111 is colinearly arranged with the axis of the first electrode 210, and the remaining first through holes 2111 are uniformly arranged along the circumference of the first electrode 210; a plurality of second through holes 2211 are provided at the distal end of the insulating layer 220, wherein the axis of one of the second through holes 2211 is colinearly arranged with the axis of the insulating layer 220, and the remaining second through holes 2211 are uniformly arranged along the circumference of the insulating layer 220; a plurality of third through holes 2311 are provided at the distal end of the second electrode 230, wherein the axis of one of the third through holes 2311 is colinearly arranged with the axis of the second electrode 230, and the remaining third through holes 2311 are uniformly arranged along the circumference of the second electrode 230. Therefore, by setting a plurality of first through holes 2111 at the distal end of the first electrode 210, setting a plurality of second through holes 2211 corresponding to the first through holes 2111 at the distal end of the insulating layer 220, and setting a plurality of third through holes 2311 corresponding to the second through holes 2211 at the distal end of the second electrode 230, the shock wave guide wire can emit shock waves in multiple directions at the front end, thereby effectively shattering the stubborn calcified plaques and fibrous foci at the front end, and better establishing a channel for subsequent expansion of the balloon and stent.

[0065] Specifically, the diameters of the plurality of first through holes 2111 may be the same or different; similarly, the diameters of the plurality of second through holes 2211 may be the same or different, and the diameters of the plurality of third through holes 2311 may be the same or different. Preferably, the diameter of the first through hole 2111 coaxially arranged with the first electrode 210 is larger than the diameter of the remaining first through holes 2111, the diameter of the second through hole 2211 coaxially arranged with the insulating layer 220 is larger than the diameter of the remaining second through holes 2211, and the diameter of the third through hole 2311 coaxially arranged with the second electrode 230 is larger than the diameter of the remaining third through holes 2311. Thus, this arrangement can ensure that the shock wave guide wire can emit shock waves in multiple directions to smoothly shatter the stubborn calcified plaques and fibrous foci at the front end, and can also ensure the overall structural strength of the electrode assembly 200.

[0066] It should be noted that, as can be understood by those skilled in the art, when the number of the first through hole 2111, the second through hole 2211, and the third through hole 2311 is multiple, the number of liquid passage cavities 121 inside the tube body 100 is also multiple, that is, each of the first through holes 2111 is respectively connected to a liquid passage cavity 121. Further, in some embodiments, a plurality of liquid passage tubes 120 corresponding to the first through holes 2111 may be arranged in the outer tube 110, each of the liquid passage tubes 120 is a variable diameter structure with a thin distal end and a thick proximal end, and the distal end of each of the liquid passage tubes 120 is fixedly connected to the corresponding first through hole 2111. Further, an inner tube 130 may be arranged in the outer tube 110, and all of the liquid passage tubes 120 are arranged inside the inner tube 130. In other embodiments, a liquid passage tube 120 having a plurality of liquid outlets at the distal end may be disposed in the outer tube 110 , wherein the liquid outlets are disposed corresponding to the first through hole 2111 , and each of the liquid outlets is fixedly connected to the corresponding first through hole 2111 .

[0067] It should also be noted that the electrode assembly 200 provided in this embodiment may also include a first heat shrink tube 240 coated on the inner surface of the proximal end of the first electrode 210 and a second heat shrink tube 250 coated on the outer surface of the proximal end of the second electrode 230. In addition, it should be noted that more contents of the electrode assembly 200 provided in this embodiment can be adaptively understood by referring to the relevant contents of the electrode assembly 200 provided in the first embodiment, and will not be repeated here.

[0068] In order to realize the above idea, the utility model also provides a shock wave wire system, which includes a shock wave control generator 300 and the shock wave wire described above. Since the shock wave wire system provided by the utility model includes the shock wave wire provided by the utility model, the shock wave wire system provided by the utility model at least includes all the beneficial effects of the shock wave wire provided by the utility model. For details, please refer to the relevant description above, which will not be repeated here. It should be noted that the utility model does not limit the specific type of the shock wave control generator 300, and the shock wave control generator 300 can be but is not limited to a high voltage pulse generator.

[0069] In summary, compared with the prior art, the shock wave guide wire and shock wave guide wire system provided by the utility model have the following beneficial effects:

[0070] The shock wave guide wire provided by the utility model is provided with an electrode assembly 200 including a first electrode 210, an insulating layer 220 and a second electrode 230 from inside to outside at the distal end of a tube body 100. Since the distal end of the first electrode 210 is provided with at least one first through hole 2111, the distal end of the insulating layer 220 is provided with at least one second through hole 2211 corresponding to the first through hole 2111, and the distal end of the second electrode 230 is provided with at least one third through hole 2311 corresponding to the second through hole 2211, the first through hole 2111, the second through hole 2211 and the third through hole 2311 correspondingly arranged are connected to each other; the interior of the tube body 100 has at least one liquid passage cavity 121 corresponding to the first through hole 2111, and the liquid passage cavity 121 is used to transport a conductive liquid to the first through hole 2111 correspondingly arranged thereto, thereby, in actual use, the conductive liquid (such as salt water) can pass through The liquid is transported through the liquid cavity 121 to the first through hole 2111 and then to the second through hole 2211 and the third through hole 2311 in sequence. The shock wave control generator 300 applies an electric signal to the first electrode 210 and the second electrode 230, so that a high potential difference is formed between the first electrode 210 and the second electrode 230, thereby discharging in the circumference of the third through hole 2311, so that the conductive liquid located at the periphery of the third through hole 2311 generates bubbles, and the plasma arc of the current is prompted to pass through the bubbles, thereby causing the bubbles to expand and collapse rapidly, and then forming a shock wave. The shock wave can apply mechanical force or pressure through the conductive liquid to continuously act on the stubborn calcified plaques and fibrous foci at the front end to break them, thereby establishing a channel for the subsequent expansion of the balloon and stent, thereby making the stenosis and even chronic total occlusion surgery related to the coronary artery and peripheral artery simpler, so that ordinary doctors can also operate it, greatly reducing the failure rate of the operation.

[0071] It should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0072] It should also be noted that the above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure content belong to the protection scope of the utility model. Obviously, technicians in this field can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations fall within the scope of the utility model and its equivalent technology, the utility model is also intended to include these modifications and variations.

Claims

1. A shock wave guide wire, characterized in that: The invention comprises a tube body and an electrode assembly arranged at the distal end of the tube body, wherein the electrode assembly comprises a first electrode, an insulating layer and a second electrode, wherein the insulating layer is sleeved on the outer surface of the first electrode, and the second electrode is sleeved on the outer surface of the insulating layer, and the first electrode and the second electrode are both connected to a shock wave control generator; The distal end of the first electrode is provided with at least one first through hole, the distal end of the insulating layer is provided with at least one second through hole corresponding to the first through hole, the distal end of the second electrode is provided with at least one third through hole corresponding to the second through hole, and the correspondingly provided first through hole, second through hole and third through hole are connected to each other; The tube body has at least one liquid passage cavity in communication with the first through hole, and the liquid passage cavity is used to transport the conductive liquid to the first through hole correspondingly arranged therein.

2. The shock wave guide wire according to claim 1, characterized in that The tube body includes an outer tube and at least one liquid passing tube, the liquid passing tube is passed through the interior of the outer tube, the liquid passing cavity is located inside the liquid passing tube, the distal end of the outer tube is connected to the proximal end of the second electrode, and the distal end of the liquid passing tube extends into the first electrode and is connected to the distal end of the first electrode.

3. The shock wave guide wire according to claim 2, characterized in that: The inner diameter and / or outer diameter of the liquid passage tube gradually increases in the direction from the distal end to the proximal end.

4. The shock wave guide wire according to claim 2, characterized in that: The material of the liquid passage pipe is metal, and the outer surface and the inner surface of the liquid passage pipe are both provided with insulating coatings.

5. The shock wave guide wire according to claim 2, characterized in that: The tube body further comprises an inner tube penetrating the interior of the outer tube, the liquid passage tube penetrating the interior of the inner tube, and the distal end of the inner tube is connected to the proximal end of the first electrode.

6. The shock wave guide wire according to claim 1, characterized in that: A plurality of first through holes are provided at the distal end of the first electrode, wherein the axis of one of the first through holes is collinearly arranged with the axis of the first electrode, and the remaining first through holes are evenly arranged along the circumference of the first electrode; a plurality of second through holes are provided at the distal end of the insulating layer, wherein the axis of one of the second through holes is collinearly arranged with the axis of the insulating layer, and the remaining second through holes are evenly arranged along the circumference of the insulating layer; a plurality of third through holes are provided at the distal end of the second electrode, wherein the axis of one of the third through holes is collinearly arranged with the axis of the second electrode, and the remaining third through holes are evenly arranged along the circumference of the second electrode.

7. The shock wave guide wire according to claim 1, characterized in that: The first electrode includes a first convex portion and a first connecting portion connected along its distal end to its proximal end, and the first through hole is provided on the first convex portion; the insulating layer includes a second convex portion and a second connecting portion along its distal end to its proximal end, and the second through hole is provided on the second convex portion; the second electrode includes a third convex portion and a third connecting portion connected along its distal end to its proximal end, and the third through hole is provided on the third convex portion; the first convex portion, the second convex portion and the third convex portion are all arranged in a hemispherical shape.

8. The shock wave guide wire according to claim 7, characterized in that: The outer diameter of the first connecting portion is smaller than the outer diameter of the first convex portion to form a first outer step surface, and the inner diameter of the first connecting portion is smaller than the inner diameter of the first convex portion to form a first inner step surface; the outer diameter of the second connecting portion is smaller than the outer diameter of the second convex portion to form a second outer step surface, and the inner diameter of the second connecting portion is smaller than the inner diameter of the second convex portion to form a second inner step surface; the outer diameter of the third connecting portion is smaller than the outer diameter of the third convex portion to form a third outer step surface, and the inner diameter of the third connecting portion is smaller than the inner diameter of the third convex portion to form a third inner step surface.

9. The shock wave guide wire according to claim 1, characterized in that: The maximum diameter of the first through hole is smaller than or equal to the minimum diameter of the second through hole corresponding thereto, and the maximum diameter of the second through hole is smaller than or equal to the minimum diameter of the third through hole corresponding thereto.

10. The shock wave guide wire according to claim 1, characterized in that: The electrode assembly further includes a first heat shrink tube coated on an inner surface of a proximal end of the first electrode and a second heat shrink tube coated on an outer surface of a proximal end of the second electrode.

11. The shock wave guide wire according to claim 1, characterized in that: It also includes a connecting seat, and the proximal end of the tube body is connected to the connecting seat.

12. A shock wave wire guide system, characterized in that: The invention comprises a shock wave control generator and the shock wave guide wire according to any one of claims 1 to 11.

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