Impact waveguide wire and impact wave generating device

Abstract

The utility model discloses an impact waveguide wire and an impact wave generating device, and relates to the technical field of medical instruments. The impact waveguide wire comprises a core wire, an outer sleeve, a balloon and more than one electrode pair, the outer sleeve is arranged on the periphery of the core wire in a sleeving mode, the outer sleeve and the core wire form a guide wire body, the outer diameter of the guide wire body is smaller than 0.45 mm, a filling channel is formed between the core wire and the outer sleeve, the near end of the outer sleeve is connected with the catheter base, and the catheter base is suitable for being filled with filling liquid; the balloon is arranged at the far end of the core wire and connected with the outer sleeve, and the balloon is communicated with the filling channel; and the plurality of electrodes are respectively arranged in the balloon and are suitable for being electrically connected with a pulse power supply host. The structure of the shock wave catheter is improved, the guide wire and the sacculus shock wave generating device are integrated, the size is reduced, the sacculus shock wave generating device can pass through a very narrow blood vessel area, the tip end of the shock wave guide wire can open a completely-closed area in a blood vessel, and the sacculus can be sent to a target position only by being matched with a micro catheter. And the safety of the operation is improved.

Description

Technical Field

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

[0002] Percutaneous Coronary Intervention (PCI) refers to a treatment method that uses cardiac catheterization technology to clear the narrowed coronary artery lumen and thus improve myocardial blood perfusion.

[0003] Intravascular Lithotripsy (IVL) is a new PCI technology developed in recent years. Its principle is to place one or several pairs of discharge electrodes in the balloon catheter to form a shock wave generating device. The electrodes are connected to the high-voltage pulse power supply host at the other end of the catheter through a connector. The balloon is then placed at the calcified lesion in the blood vessel. The system generates shock waves in the balloon by applying high-voltage pulses, which can rupture the calcified plaques in the blood vessel wall.

[0004] The IVL catheter currently on the market is based on the structure of the traditional percutaneous transluminal coronary angioplasty (PTCA) balloon dilatation catheter. The catheter with a balloon is sent into the coronary artery to reach the stenotic segment through percutaneous puncture of the peripheral artery. The balloon is expanded to expand the stenotic lumen, and then a shock wave electrode is placed inside the balloon. The catheter enters the blood vessel to reach the target lesion in a similar way to the traditional PTCA balloon dilatation catheter. The balloon part at the front end of the IVL catheter is passed through the target lesion under the guidance of the PCI guidewire.

[0005] However, due to the large outer diameter of existing IVL catheters, for complex and severe vascular calcification lesions, the residual channels in the vascular lumen are very small, and such catheters cannot pass through the target lesions smoothly. Generally, a rotary grinding catheter is used to assist in opening the occluded position of the blood vessel. The rotary grinding catheter is generally hard, and if it is not operated properly, it will cause damage to the blood vessel wall. In addition, after using the rotary grinding catheter, the PCI guidewire will be replaced to guide the entry of the shock wave catheter, and the operation is also relatively cumbersome. Utility Model Content

[0006] The main purpose of the utility model is to provide a shock wave guide wire and a shock wave generating device, aiming to improve the convenience and safety of intravascular shock wave angioplasty.

[0007] To achieve the above object, the utility model provides a shock wave guide wire, comprising:

[0008] A core wire, wherein the core wire is a solid elongated shaft;

[0009] An outer sleeve is sleeved on the outer circumference of the core wire and forms a guide wire body with the core wire. The outer diameter of the guide wire body is less than 0.45 mm. A filling channel is formed between the core wire and the outer sleeve. The proximal end of the outer sleeve is connected to the catheter seat. The catheter seat is suitable for injecting a filling liquid.

[0010] a balloon, disposed on the distal end of the core wire and connected to the outer sleeve, the balloon being in communication with the filling channel; and

[0011] More than one electrode pair is respectively arranged in the balloon and is suitable for being electrically connected to the pulse power supply host.

[0012] Optionally, the shock wave guide wire further includes a distal structure, the distal structure is wrapped by a flexible composite structure, the flexible composite structure includes an inner layer and an outer layer, the outer layer is wrapped around the periphery of the inner layer, and the outer layer, the inner layer and the core wire are fused and fixed.

[0013] Optionally, the outer diameter of the flexible composite structure is 0.25 mm-0.3 mm; and / or

[0014] The inner layer is formed by winding a metal wire with a wire diameter of 0.1 mm at a pitch of 0.2 mm, and the winding length is 10 cm, or the inner layer is braided by a metal wire with a wire diameter of 0.02 mm; and / or

[0015] The outer layer is a protective layer with a thickness of 0.01 mm-0.05 mm.

[0016] Optionally, the core wire is made of metal, and the outline diameter of the core wire gradually decreases from its proximal end to its distal end; the distal diameter of the core wire is 0.05mm-0.1mm, and the proximal diameter of the core wire is 0.15mm-0.3mm.

[0017] Optionally, the balloon is sealed on the outer sleeve along the extension direction of the elongated shaft;

[0018] The length of the balloon is 10mm-60mm, the outer diameter of the balloon when it is not filled is 0.35mm-0.4mm, and the outer diameter of the balloon when it is filled is 0.7mm-4.0mm.

[0019] Optionally, the catheter seat includes a seat body and a first interface, a second interface and a third interface respectively connected to the seat body, the first interface is connected to the outer sleeve, the second interface is used to be filled with liquid, and the third interface is suitable for connecting to a connector.

[0020] Optionally, the electrode pair is a ring-shaped electrode pair; or the electrode pair is a spiral electrode pair.

[0021] Optionally, when the electrode pair is a spiral electrode pair, the electrode pair includes two insulated wires spirally wound on the core wire, namely a first wire and a second wire. Along the extension direction of the core wire, the first wire is provided with a plurality of first electrode openings, and the second wire is provided with a plurality of second electrode openings. The plurality of first electrode openings and the plurality of second electrode openings respectively constitute a plurality of electrode pairs, and the electrode pair is used to generate shock waves.

[0022] Optionally, the inner diameter of the outer sleeve is 0.35 mm and the outer diameter is 0.4 mm.

[0023] In order to achieve the above object, the utility model also proposes a shock wave generating device, comprising:

[0024] A pulse power supply host, used for generating a pulse signal; and

[0025] A shock wave guide wire, wherein the shock wave guide wire is the shock wave guide wire as described above, and the shock wave guide wire is electrically connected to the pulse power supply host; the shock wave guide wire comprises:

[0026] A core wire, wherein the core wire is a solid elongated shaft;

[0027] An outer sleeve is sleeved on the outer circumference of the core wire and forms a guide wire body with the core wire. The outer diameter of the guide wire body is less than 0.45 mm. A filling channel is formed between the core wire and the outer sleeve. The proximal end of the outer sleeve is connected to the catheter seat. The catheter seat is suitable for injecting a filling liquid.

[0028] a balloon, disposed on the distal end of the core wire and connected to the outer sleeve, the balloon being in communication with the filling channel; and

[0029] More than one electrode pair is respectively arranged in the balloon and is suitable for being electrically connected to the pulse power supply host.

[0030] In the technical scheme of the utility model, the shock wave guide wire includes a core wire, an outer sleeve, a balloon and one or more electrode pairs; the core wire is a solid slender shaft; the outer sleeve is sleeved on the outer periphery of the core wire and forms a guide wire body with the core wire, the outer diameter of the guide wire body is less than 1.20mm, a filling channel is formed between the core wire and the outer sleeve, the proximal end of the outer sleeve is connected to the catheter seat, and the catheter seat is suitable for injecting filling liquid; the balloon is arranged on the distal end of the core wire and connected to the outer sleeve, and the balloon is connected to the filling channel; the electrode pairs are respectively arranged in the balloon and are suitable for being electrically connected to the pulse power supply host. It can be understood that the utility model improves the structure of the shock wave catheter, sets the guide wire and the balloon catheter as one body, reduces the size, can pass through a very narrow blood vessel area, and the tip of the distal end of the shock wave guide wire can open the completely occluded area in the blood vessel, or in some cases, only with the microcatheter can the balloon be delivered to the target position, the operation is more convenient, and the safety of the operation is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 This is a schematic structural diagram of an embodiment of the shock wave guide wire (including a connector) of the utility model;

[0033] Figure 2 This is a schematic structural diagram of an embodiment of the shock wave guide wire of the utility model;

[0034] Figure 3 It is a partial structural schematic diagram of an embodiment of the shock wave guide wire of the utility model;

[0035] Figure 4 It is a partial perspective line drawing of an embodiment of the shock wave guide wire of the utility model;

[0036] Figure 5 It is a structural schematic diagram of another embodiment of the shock wave guide wire of the utility model.

[0037] Description of Figure Numbers:

[0038] 10. core wire; 20. outer sleeve; 30. balloon; 40. electrode pair; 50. catheter seat; 60. connector; 11. flexible composite structure; 70. stress protection tube; 50a. filling interface.

[0039] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0044] The utility model provides a shock wave guide wire, which can be used for percutaneous coronary intervention treatment, especially the treatment of chronic total occlusion (CTO) of coronary artery, but is not limited here.

[0045] Reference Figures 1 to 4In one embodiment of the utility model, the shock wave guide wire comprises a core wire 10, an outer sleeve 20, a balloon 30 and a plurality of electrode pairs 40; the core wire 10 is a solid slender shaft; the outer sleeve 20 is sleeved on the outer periphery of the core wire 10 and forms a guide wire body with the core wire 10, the outer diameter of the guide wire body is less than 0.45 mm, a filling channel is formed between the core wire 10 and the outer sleeve 20, the proximal end of the outer sleeve 20 is connected to the catheter seat 50, and the catheter seat 50 is suitable for injecting filling liquid; the balloon 30 is arranged on the distal end of the core wire 10 and connected to the outer sleeve 20, and the balloon 30 is connected to the filling channel; a plurality of electrode pairs 40 are respectively arranged in the balloon 30 and are suitable for being electrically connected to the pulse power supply host through a wire and a connector 60, the inner layer of the wire can be a metal conductor, the outer layer of the wire is an insulating material, one end of the wire is connected to the electrode pair 40, and the other end is connected to the connector 60, and the connector 60 is connected to the pulse power supply host. In this embodiment, a stress protection tube 70 can be sleeved at the connection between the outer sleeve 20 and the catheter seat 50.

[0046] It can be understood that the utility model combines some features of the shock wave catheter (IVL catheter) and the existing PCI guidewire, but the two are not a simple structural combination. Compared with the existing shock wave catheter, the shock wave guidewire in this application does not need to set up a guidewire cavity for the guidewire to pass through, so without an additional guidewire cavity, the overall size of the shock wave guidewire can be reduced, so that it can enter the narrow area of ​​smaller vascular lesions, especially the CTO complete occlusion area, which the existing IVL catheter cannot pass through. At the same time, the main body of the shock wave guidewire is composed of a guidewire, so it does not need an additional guidewire to guide itself, and it can play a guiding role.

[0047] A balloon 30 and an electrode pair 40 inside the balloon 30 are provided at the distal end of the shock wave guide wire of the present application, which can realize the function of the shock wave guide wire and solve the problem that the diseased area cannot be completely occluded through the blood vessel.

[0048] Therefore, the improvement of the present application is not just a simple combination of the shock wave catheter and the PCI guidewire, but the proposal of the technical problem itself. The proposal of such a treatment device for the complete lesion area of ​​CTO is a solution that requires a lot of experimental research by technical personnel in this field.

[0049] Furthermore, the distal structure of the shock wave guide wire in the present application can be used to directly open the completely occluded area, which can effectively prevent the possible damage to the blood vessel wall caused by the grinding guide wire, thereby opening the calcified blood vessels and allowing blood to flow smoothly in the blood vessels.

[0050] The shock wave guide wire involved in the utility model has a small profile. The size of the shock wave guide wire is the same as or smaller than that of the PCI guide wire. The outer diameter of the guide wire body can be as thin as 0.45 mm. Compared with the shock wave catheter which can only be used for calcified lesions with a lumen channel larger than 1.2 mm, the shock wave guide wire can be used for complex vascular calcification diseases with tiny channels.

[0051] The shock wave guide wire involved in the utility model can be compatible with and used in conjunction with a microcatheter, and can be used for the treatment of calcification of completely occluded lesions. In addition to the conventional forward PCI path, the shock wave guide wire can also be applied to the reverse PCI path. It is worth mentioning that compared with the forward guide wire technology, the reverse PCI technology is more difficult and risky, requiring the operator to be very familiar with the various techniques and operating methods of forward interventional treatment, and have sufficient ability to foresee and reduce the occurrence of various complications. The shock wave guide wire solution of the present application also provides more possibilities for the reverse PCI path, not only because of its thinner size, compared with the catheter of the prior art, the selection of the guide wire body is more directional, and the flexibility is also more advantageous than the IVL catheter.

[0052] The utility model improves the structure of the shock wave catheter, sets the guide wire and the balloon 30 catheter as one body, reduces the size, can pass through very narrow blood vessel areas, and the tip of the shock wave guide wire at the distal end can open the completely occluded area in the blood vessel, or in some cases, only with the microcatheter can the balloon 30 be delivered to the target position, which is more convenient to operate and increases the safety of the operation.

[0053] When using the shock wave guide wire, you can refer to the following steps:

[0054] 1) Manipulate the PCI guidewire and microcatheter to pass through the vascular calcification lesion (this step is the basic operation of PCI surgery, and the PCI guidewire and microcatheter are also essential instruments in PCI surgery; it should be noted that a microcatheter refers to a reinforced catheter with a very small diameter. There is no strict size definition, but based on experience, catheters with an outer diameter of 0.70 mm to 1.30 mm are often called microcatheters. Microcatheters can be used for guidewire support / exchange, passing through lesions, delivering embolic agents, stents, etc.);

[0055] 2) Remove the PCI guidewire and leave the microcatheter in place as a guidewire exchange channel;

[0056] 3) inserting the shock wave guide wire along the inner cavity of the microcatheter until the balloon 30 portion of the shock wave guide wire completely extends out of the tip of the microcatheter;

[0057] 4) withdrawing the shock wave guide wire and the microcatheter simultaneously until the balloon 30 of the shock wave guide wire coincides with the location of the calcified lesion;

[0058] 5) The balloon 30 on the shock wave guide wire is filled to a first target pressure and size and maintained, the shock wave device is started, and the shock wave electrode pair 40 discharges, during which shock waves are released to cause cracks in the calcified lesion;

[0059] 6) The shock wave device stops working, and the balloon 30 on the shock wave guide wire is refilled to a second target pressure to further expand the calcified lesion;

[0060] 7) Repeat the above two steps until satisfactory results are obtained;

[0061] 8) Deflate the balloon 30 and partially withdraw the balloon 30 into the microcatheter, and then withdraw the shock wave guide wire and the microcatheter together.

[0062] The principle is that the shock wave guide wire is electrically connected to a high-frequency voltage. Under the high-frequency voltage, the electrode pair 40 receives a high-voltage pulse signal to generate a shock wave, which acts on the lesion through the wall of the balloon 30 .

[0063] The above embodiment is a method of using a microcatheter, which is not limiting. In some clinical situations, a microcatheter may not be needed.

[0064] In order to further improve the smoothness of the shock wave guide wire passing through the occluded position of the blood vessel, so that it can pass through more occluded positions and adapt to different vascular structures, reference Figures 1 to 4 In one embodiment, the shock wave guide wire may further include a distal structure, which is wrapped by a flexible composite structure 11. The flexible composite structure 11 includes an inner layer and an outer layer arranged on the periphery of the inner layer. The outer layer, the inner layer and the core wire 10 are fused and fixed.

[0065] In this embodiment, the flexible composite structure 11 can be made of metal and polymer materials, has certain flexibility and support, and can be pre-molded into a certain angle and shape according to usage requirements to adapt to different blood vessel structures.

[0066] Preferably, the overall outer diameter of the flexible composite structure 11 can be 0.25mm-0.3mm, and the inner layer can be a winding or braided structure, specifically, it can be made of a metal wire with a wire diameter of 0.1mm and a pitch of 0.2mm, with a winding length of 10cm, or it can be made of a metal wire with a wire diameter of 0.02mm woven in 16 strands, and the outer layer is a protective layer with a thickness of 0.01mm-0.05mm.

[0067] The flexible composite structure 11 has a small outer diameter and can easily enter narrower or completely occluded blood vessels. At the same time, its woven or pitch-wound structure can ensure its hardness and has strong penetration into narrower or completely occluded vascular lesion areas without the need for additional grinding guide wire assistance. In a surgical scenario, replacing one less catheter or device is extremely important to the success of the operation.

[0068] The metal wire of the inner layer may be made of materials such as platinum-iridium alloy, and the outer layer may be made of polymer materials such as polyurethane and nylon, but there is no limitation here.

[0069] In order to further improve the application scope of the shock wave guide wire, refer to Figures 1 to 4 In one embodiment, the core wire 10 can be made of metal materials such as nickel titanium, and the outline diameter of the core wire 10 gradually decreases from its proximal end to its distal end.

[0070] In this embodiment, the distal diameter of the core wire 10 can be 0.05mm-0.1mm, and the proximal diameter of the core wire 10 can be 0.15mm-0.3mm. Preferably, the distal portion of the core wire 10 has a diameter of 0.05mm and a length of 13cm, the proximal portion of the core wire 10 has a diameter of 0.2mm and a length of 165cm, and the length of the middle transition portion of the core wire 10 (the portion where the distal diameter of 0.05mm and the proximal diameter of 0.2mm are connected, and the core wire 10 has a gradient profile) is 5cm long.

[0071] The balloon 30 is sealed on the shock wave guide wire outer sleeve 20 along the elongated axis extending direction. The balloon 30 is connected to the filling channel so that a filling liquid such as saline can enter the balloon 30 through the filling channel. The balloon 30 expands and fills the balloon 30 to contact the calcified position of the blood vessel wall. To ensure that the balloon 30 can reach the target position and improve the shock wave treatment effect, refer to Figure 3 and Figure 4 In one embodiment, the material of the balloon 30 may be PA11, etc., the length of the balloon 30 may be 10 mm-60 mm, the outer diameter of the balloon 30 when it is not filled is 0.35 mm-0.4 mm, and the outer diameter of the balloon 30 when it is filled is 0.7 mm-4.0 mm. The balloon 30 may be made of non-compliant and electrically insulating materials, which helps prevent the balloon 30 from expanding during the generation of shock waves and protects the patient from any electric shock.

[0072] Preferably, the volume of the balloon 30 in a filled state can be 2-5 times the volume of the balloon 30 in an unfilled state, and the balloon 30 can automatically recover to its original size after the filling pressure is removed, that is, the material of the balloon 30 should have self-recovery ability.

[0073] To further improve the effect of shock wave therapy, refer to Figure 3 and Figure 4In one embodiment, several electrode pairs 40 are located inside the balloon 30 and are arranged on the core wire 10. The electrode pairs 40 can be made of copper or silver, etc., and each pair of two electrodes is connected to the corresponding wire. Multiple pairs of electrode pairs 40 can be set according to the length of the balloon 30. After the pulse voltage is applied to the electrode pairs 40, an arc is generated. The arc between the electrodes generates shock waves in the liquid of the balloon 30. The electrode shape of the electrode pair 40 can be sheet-shaped, ring-shaped, dot-shaped or line-shaped, etc. Every two adjacent electrodes are a pair, and one or more pairs of electrode pairs 40 can be set. The size of the shock wave can be controlled by controlling the pulse voltage, current, duration and repetition rate.

[0074] Regarding the electrode pair 40, Figure 5 As shown, it is an embodiment of an electrode, including two insulated wires spirally wound on a core wire 10, which are a first wire and a second wire. Along the extension direction of the core wire 10, the first wire is provided with a plurality of first electrode openings, and the second wire is provided with a plurality of second electrode openings. The plurality of first electrode openings and the plurality of second electrode openings respectively form a plurality of electrode pairs 40, and the electrode pairs 40 are used to generate shock waves. The insulated wire includes a conductive metal and an insulating outer layer, the insulating outer layer is wrapped around the outer periphery of the conductive metal, and the conductive metal can be made of metal materials such as aluminum and copper. Along the extension direction of the core wire 10, the insulating outer layer is provided with a plurality of openings to expose the conductive metal inside, and the exposed area forms an electrode opening. In this embodiment, the material of the electrode pair 40 can be copper, the electrode pair 40 is a spiral electrode pair 40, the diameter of the electrode pair 40 is 0.05mm-0.15mm, and the pitch of the electrode pair 40 is 0.05mm-0.2mm.

[0075] In another embodiment, the electrode pair 40 is made of 304 stainless steel, and the electrode pair 40 is a ring-shaped electrode pair. The inner diameter of the ring of the electrode pair 40 is 0.1 mm, the thickness is 0.05 mm-0.1 mm, and the length is 0.3 mm-1.0 mm.

[0076] The above two electrode embodiments are just two examples. The electrode method in this application is not limited to the above two electrode solutions.

[0077] In order to enable the shock wave guide wire to pass smoothly through the occluded or blocked area in the blood vessel, refer to Figures 1 to 4 In one embodiment, the inner diameter of the outer sleeve 20 can be 0.35 mm, and the outer diameter can be 0.4 mm. In this embodiment, the outer sleeve 20 is sleeved on the core wire 10 and the guide wire, one end of which is connected to the balloon 30, and the other end is connected to the catheter seat 50. The gap between the outer sleeve 20 and the core wire 10 is the filling channel of the balloon 30. The material of the outer sleeve 20 can be Pebax, etc., which is not limited here.

[0078] In addition, the main reference Figure 2The catheter seat 50 includes a seat body 51 and a first interface 52, a second interface 53 and a third interface 54 respectively connected to the seat body 51, the first interface 52 is connected to the outer sleeve 20, the second interface 53 is used to fill with liquid, and the third interface 54 is suitable for connecting to the connector 60.

[0079] Combination Figure 1 , Figure 2 and Figure 5 The catheter seat 50 can be made of polymer material, and an interface is provided at one end of the seat body 51, which is a first interface 52 connected to the outer sleeve 20, and two interfaces are provided at the other end, namely a second interface 53 and a third interface 54 filled with liquid. A fluid channel 51a and a wiring channel are provided in the seat body 51 of the catheter seat 50, one end of the fluid channel 51a is connected to the filling channel, and the second interface 53 is provided with a liquid inlet channel 53a connected to the other end of the fluid channel 51a, and the third interface 54 is a terminal interface, which is connected to the pulse power supply host through a connector 60.

[0080] The utility model also proposes a shock wave generating device, which includes a shock wave guide wire. The specific structure of the shock wave guide wire refers to the above-mentioned embodiment. Since the shock wave generating device proposed in the utility model includes all schemes of all embodiments of the above-mentioned shock wave guide wire, it has at least the same technical effect as the above-mentioned shock wave guide wire, which will not be elaborated here one by one.

[0081] In one embodiment, the shock wave generating device further comprises a pulse power supply host for generating a pulse signal, and the shock wave guide wire is electrically connected to the pulse power supply host via a conductor.

[0082] Reference Figures 1 to 4 In this embodiment, the pulse power supply host is also used to control the electrode pair 40 to discharge and last for a first preset time when the balloon 30 of the shock wave guide wire is filled to a first target pressure and maintained; and to control the electrode pair 40 to discharge and last for a second preset time when the balloon 30 of the shock wave guide wire is filled to a second target pressure and maintained. The specific control timing can be referred to the above-mentioned steps for using the shock wave guide wire, which will not be repeated here.

[0083] It should be noted that the target pressure for filling the balloon 30 can be set according to the specific situation. Different treatment methods can be used for calcified plaques of different sizes and blood vessels of different thicknesses. Different filling times and their corresponding target pressures and appropriate discharge times can be set. The specific values ​​of the filling times of the balloon 30, the first target pressure, the second target pressure, the first preset time and the second preset time are not limited here.

[0084] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A shock wave guide wire, characterized in that: include: A core wire, wherein the core wire is a solid elongated shaft; An outer sleeve is sleeved on the outer circumference of the core wire and forms a guide wire body with the core wire. The outer diameter of the guide wire body is less than 0.45 mm. A filling channel is formed between the core wire and the outer sleeve. The proximal end of the outer sleeve is connected to the catheter seat. The catheter seat is suitable for injecting a filling liquid. a balloon, disposed on the distal end of the core wire and connected to the outer sleeve, the balloon being in communication with the filling channel; and More than one electrode pair is respectively arranged in the balloon and is suitable for being electrically connected to the pulse power supply host.

2. The shock wave guide wire according to claim 1, characterized in that The shock wave guide wire also includes a distal structure, which is wrapped by a flexible composite structure. The flexible composite structure includes an inner layer and an outer layer. The outer layer is wrapped around the periphery of the inner layer. The outer layer, the inner layer and the core wire are fused and fixed.

3. The shock wave guide wire according to claim 2, characterized in that: The outer diameter of the flexible composite structure is 0.25 mm to 0.3 mm; and / or The inner layer is formed by winding a metal wire with a wire diameter of 0.1 mm at a pitch of 0.2 mm, and the winding length is 10 cm, or the inner layer is braided by a metal wire with a wire diameter of 0.02 mm; and / or The outer layer is a protective layer with a thickness of 0.01 mm-0.05 mm.

4. The shock wave guide wire according to claim 1, characterized in that The core wire is made of metal, and the outline diameter of the core wire gradually decreases from its proximal end to its distal end; the distal diameter of the core wire is 0.05mm-0.1mm, and the proximal diameter of the core wire is 0.15mm-0.3mm.

5. The shock wave guide wire according to claim 1, characterized in that: The balloon is sealed on the outer sleeve along the extending direction of the elongated shaft; The length of the balloon is 10mm-60mm, the outer diameter of the balloon when it is not filled is 0.35mm-0.4mm, and the outer diameter of the balloon when it is filled is 0.7mm-4.0mm.

6. The shock wave guide wire according to claim 5, characterized in that The catheter seat includes a seat body and a first interface, a second interface and a third interface respectively connected to the seat body, the first interface is connected to the outer sleeve, the second interface is used to be filled with liquid, and the third interface is suitable for connecting to a connector.

7. The shock wave guide wire according to claim 1, characterized in that The electrode pair is a ring-shaped electrode pair; or the electrode pair is a spiral electrode pair.

8. The shock wave guide wire according to claim 7, characterized in that When the electrode pair is a spiral electrode pair, the electrode pair includes two insulated wires spirally wound on the core wire, which are a first wire and a second wire. Along the extension direction of the core wire, the first wire is provided with a plurality of first electrode openings, and the second wire is provided with a plurality of second electrode openings. The plurality of the first electrode openings and the plurality of the second electrode openings respectively constitute a plurality of the electrode pairs, and the electrode pair is used to generate shock waves.

9. The shock wave guide wire according to claim 1, characterized in that: The inner diameter of the outer sleeve is 0.35 mm, and the outer diameter is 0.4 mm.

10. A shock wave generating device, characterized in that: include: Pulse power supply host, used to generate pulse signal; as well as A shock wave guide wire, wherein the shock wave guide wire is the shock wave guide wire as claimed in any one of claims 1 to 9, and the shock wave guide wire is electrically connected to the pulse power supply host.

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