Positioning catheter and shock wave system

Abstract

The utility model relates to a positioning catheter and a shock wave system, and relates to the technical field of medical instruments.The positioning catheter comprises a first catheter body and a positioning body, the positioning body is connected with the far end of the first catheter body, the positioning body comprises a self-expansion net body arranged outside the first catheter body, and the self-expansion net body is used for being in a contracted state when bound by external pressure; and after the external pressure is removed, the device is automatically expanded into an expanded state. The positioning catheter and the shock wave system can be suitable for blood vessels with different diameters, the step of replacing balloons with different diameters is omitted, the operation time is effectively shortened, and the operation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a positioning catheter and a shock wave system. Background Art

[0002] Shock wave systems for treating stenosis or calcification of tissues such as blood vessels and valves have been proposed and have been increasingly used clinically. The system is based on components such as catheters, and releases shock waves at the site of the lesion through interventional procedures to achieve therapeutic effects. The precise delivery of shock waves to the site of the lesion depends on the accurate and stable positioning of the catheter components. In the related art, a balloon is used to position the catheter component in the blood vessel, but its operation is inconvenient, the system cannot be adjusted after positioning, and its adaptability to blood vessels of different diameters is not high. Therefore, in order to more effectively improve the treatment effect, further improvements to the system are needed. Utility Model Content

[0003] In order to solve the above technical problems, an embodiment of the present application provides a positioning catheter and a shock wave system.

[0004] In a first aspect, a positioning catheter is provided, comprising:

[0005] first tube body;

[0006] The positioning body is connected to the distal end of the first tube body. The positioning body includes a self-expanding mesh body arranged outside the first tube body. The self-expanding mesh body is used to be in a contracted state when constrained by external pressure, and automatically expand to an expanded state after the external pressure is removed.

[0007] According to a first aspect of the present application, the self-expanding mesh includes a metal wire braided mesh, and free ends of a plurality of metal wires are fixed to one end or both ends of the self-expanding mesh.

[0008] According to the first aspect of the present application, the self-expanding mesh body includes a proximal end and a distal end, and an outer edge circumference located between the proximal end and the distal end, the proximal end and the distal end of the self-expanding mesh body are both gradually narrowing structures that converge to one side from the outer edge circumference, the proximal end of the self-expanding mesh body converges to the first tube body, and the distal end of the self-expanding mesh body converges to the distal port, and the distal port is connected to the first tube body.

[0009] According to the first aspect of the present application, the distal port and / or the self-expanding mesh body are coaxial with the first tube body, and the diameter of the distal port is not less than the diameter of the first tube body.

[0010] According to the first aspect of the present application, the positioning body comprises:

[0011] A first collar, sleeved on the outer circumference of the distal end of the first tube;

[0012] A second ring, sleeved on the first ring;

[0013] Wherein, the proximal end portion of the self-expanding mesh is disposed between the first loop and the second loop and is clamped and fixed.

[0014] According to a first aspect of the present application, an adhesive layer is applied between the inner wall of the first ferrule and the outer wall of the first tube body to bond and fix the first ferrule and the first tube body.

[0015] According to the first aspect of the present application, the positioning body further includes:

[0016] The third set of circles;

[0017] A fourth ring, sleeved on the third ring;

[0018] Wherein, the distal end portion of the self-expanding mesh body is disposed between the third loop and the fourth loop and is clamped and fixed to form a distal end portion.

[0019] According to the first aspect of the present application, the outer peripheral surface and the distal end of the self-expanding mesh body are both suspended outside the distal end of the first tube body.

[0020] According to the first aspect of the present application, the self-expanding mesh is in the shape of a cage formed by braiding wires.

[0021] According to the first aspect of the present application, the self-expanding mesh includes a plurality of preformed alloy wires, and the preformed alloy wires extend from the proximal end of the self-expanding mesh through the outer edge circumference to the distal end of the self-expanding mesh.

[0022] In a second aspect, a shock wave system is also provided, comprising:

[0023] A positioning catheter as described in the previous embodiment;

[0024] A second tube body, wherein the first tube body can be slidably disposed in the inner cavity of the second tube body, and the self-expanding mesh body can be compressed and gathered in the second tube body;

[0025] The microcatheter is slidably arranged in the inner cavity of the first tube body and the positioning body, and a shock wave transmitter is arranged at the distal end of the microcatheter.

[0026] According to a second aspect of the present application, the shock wave system further comprises:

[0027] A guide wire, the proximal end of which is connected to the distal end of the microcatheter, or the guide wire is arranged to penetrate the inner cavity of the microcatheter and can extend out of the distal end of the microcatheter.

[0028] According to a second aspect of the present application, the microcatheter comprises:

[0029] Outer tube layer;

[0030] An inner tube layer, located on the inner periphery of the outer tube layer;

[0031] The shock wave transmitter is arranged between the outer tube layer and the inner tube layer. The shock wave transmitter comprises an electrode pair exposed at the distal end of the micro-catheter and is used for emitting shock waves.

[0032] The positioning catheter provided in the embodiment of the present application has a self-expanding mesh body, and when the self-expanding mesh body is in a blood vessel, its self-expanding radial force enables the self-expanding mesh body to be supported and positioned in the blood vessel, achieving stable positioning, and keeping the distal end of the first tube body self-centered in the blood vessel cavity, thereby providing a center positioning function for the catheter or other components passing therethrough, and does not affect the control and regulation of the catheter or other components passing therethrough, such as adjusting the length of extension or retraction, and the self-expanding mesh body does not block blood flow, providing a longer treatment window. More advantageously, the distal end of the first tube body is fixedly connected to the self-expanding mesh body, and in the blood vessel cavity, the first tube body acts as an auxiliary stabilizing body, plays an auxiliary stabilizing role for the self-expanding mesh body, prevents the self-expanding mesh body from slipping, and enhances the ability to resist deformation.

[0033] The shock wave system provided in the embodiment of the present application utilizes the aforementioned positioning catheter, so that the shock wave generator can be kept stably positioned while being conveniently and flexibly adjusted in real time, so that it can be adjusted to the lesion position more accurately. In addition, compared with the solution of replacing balloons of different diameters for blood vessels of different diameters in the related art, the positioning catheter and shock wave system provided in the embodiment of the present application can not only be applied to blood vessels of different diameters, but also eliminate the step of replacing balloons of different diameters, effectively shortening the operation time and improving the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0035] Figure 1 A schematic structural diagram of a positioning catheter provided by an exemplary embodiment of the present application.

[0036] Figure 2 This is a schematic diagram of the combined structure of a positioning catheter and a microcatheter in a blood vessel provided by an exemplary embodiment of the present application. The distal end of the microcatheter extends out of the inner cavity of the positioning catheter and passes through the distal port of the positioning body to be exposed in the blood vessel cavity.

[0037] Figure 3A partially enlarged schematic diagram of the combined structure of a positioning catheter and a micro-catheter provided by an exemplary embodiment of the present application.

[0038] Figure 4 A schematic structural diagram of a positioning body provided for an exemplary embodiment of the present application.

[0039] Figure 5 A schematic diagram of a braided wire fixing structure at one end of a positioning body provided in another exemplary embodiment of the present application.

[0040] Figure 6 A schematic structural diagram of a first ferrule, a first tube body, and an adhesive layer provided in an exemplary embodiment of the present application.

[0041] Figure 7 A schematic structural diagram of the braided wire at the other end of the positioning body provided by another exemplary embodiment of the present application.

[0042] Figure 8 This is a schematic diagram of the structure of a shock wave system provided by an exemplary embodiment of the present application installed in a blood vessel.

[0043] Fig. 9 A schematic diagram of the local structure of a positioning body of a shock wave system provided by an exemplary embodiment of the present application in a restrained and compressed state.

[0044] Fig.10 A schematic structural diagram of a microcatheter provided by an exemplary embodiment of the present application.

[0045] Figure numerals: 100-positioning catheter; 110-first tube body; 120-positioning body; 121-self-expanding mesh body; 1211-outer edge circumference; 12111-alloy wire; 1212-distal port; 122-first loop; 123-second loop; 124-first adhesive layer; 125-third loop; 126-fourth loop; 200-shock wave system; 210-microcatheter; 211-outer tube layer; 212-inner tube layer; 213-shock wave transmitter; 2131-electrode pair; 220-second tube body; 230-guide wire; 240-active control console; 300-blood vessel; 400-lesion site. DETAILED DESCRIPTION

[0046] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0047] Figure 1 This is a schematic diagram of the structure of a positioning catheter provided by an exemplary embodiment of the present application. Figure 1As shown, the positioning catheter 100 provided in the embodiment of the present application may include a first tube body 110 and a positioning body 120, wherein the positioning body 120 is connected to the distal end of the first tube body 110, and the positioning body 120 includes a self-expanding mesh 121, which is disposed outside the first tube body 110. When the self-expanding mesh 121 is constrained by external pressure, it will be in a contracted state so that it has a reduced diameter and can be transported in the lumen of a blood vessel. For example, as known to those skilled in the art, an additional transport catheter or component can be used to collect the positioning catheter and deliver it in the lumen of a blood vessel. The self-expanding mesh 121 is elastic, and after the external pressure is removed, based on the property that the elastic deformation of the self-expanding mesh 121 itself tends to restore the initial shape, the self-expanding mesh 121 can automatically expand to an expanded state.

[0048] The self-expanding mesh 121 is disposed outside the first tube 110. Therefore, when the self-expanding mesh 121 is deployed in the blood vessel cavity, it is fixed in the blood vessel cavity by the radial tension generated by its elastic deformation. This is advantageous in many aspects. For example, the first tube 110 is thereby stably positioned in the blood vessel cavity, so that the first tube 110 can provide accurate delivery to the target position in the blood vessel cavity. In some examples, the delivered substance or device can be delivered to the blood vessel cavity or tissue wall via the distal end of the first tube 110 and through the gaps of the self-expanding mesh 121. In other examples, the delivered substance or device can be delivered to the blood vessel cavity or tissue wall via the distal end of the first tube 110 and through the distal end of the self-expanding mesh 121. The distal end of the self-expanding mesh 121 can have a preset opening.

[0049] It should be noted that the terms "distal end" and "proximal end" involved in this application are all based on the position when the staff operates in the field of medical devices. Specifically, for the same component, when the staff operates it, the end of the component close to the staff can be considered as the proximal end, and the end of the component away from the staff can be considered as the distal end.

[0050] Figure 2 This is a schematic diagram of the combined structure of a positioning catheter and a microcatheter in a blood vessel provided by an exemplary embodiment of the present application. Figure 2As shown, in actual application, the positioning catheter 100 can assist the microcatheter 210 to be centrally arranged in the blood vessel 300. Specifically, the microcatheter 210 can be slidably arranged in the inner cavity of the first tube body 110 and the positioning body 120. Before the positioning catheter 100 enters the blood vessel 300, external pressure is applied to the self-expanding mesh 121, so that the self-expanding mesh 121 is in a contracted state, which is convenient for extending into the blood vessel 300. After the self-expanding mesh 121 is extended into the blood vessel 300, the external pressure is withdrawn, and the self-expanding radial force of the self-expanding mesh 121 supports and positions the self-expanding mesh 121 in the blood vessel 300, achieving stable positioning, and keeping the distal end of the first tube body 110 self-centered in the cavity of the blood vessel 300, thereby providing a central positioning function for the catheter or other components passing therein, and does not affect the control and adjustment of the catheter or other components passing therein, such as adjusting the length of extension or retraction, and the self-expanding mesh 121 does not block blood flow, providing a longer treatment window. More advantageously, the distal end of the first tube body 110 is fixedly connected to the self-expanding mesh body 121. In the cavity of the blood vessel 300, the first tube body 110 serves as an auxiliary stabilizer to assist in stabilizing the self-expanding mesh body 121, thereby preventing the self-expanding mesh body 121 from slipping and enhancing the ability to resist deformation.

[0051] It should be understood that after the external pressure is removed, the self-expanding mesh 121 automatically expands due to elastic deformation and tends to be unconstrained. The self-expanding radial force of the self-expanding mesh 121 allows the self-expanding mesh 121 to be supported and positioned in the blood vessel 300. Under the limiting effect of the inner wall of the blood vessel 300, the self-expanding mesh 121 is fixed by the inner wall of the blood vessel similar to riveting. In other words, for blood vessels 300 of different diameters, the self-expanding mesh 121 can expand and abut against the inner wall of the blood vessel 300, so that the microcatheter 210 can be located in the middle of the blood vessel 300 in blood vessels 300 of different diameters without adding additional adaptation steps. Therefore, compared with the solution of replacing balloons of different diameters for blood vessels 300 of different diameters in the related art, the positioning catheter 100 provided in the embodiment of the present application can not only be applicable to blood vessels 300 of different diameters, but also can reduce the step of replacing balloons of different diameters, effectively shortening the operation time and improving the operation efficiency.

[0052] It should be noted that, in one embodiment, the self-expanding mesh 121 may include a metal wire braided mesh, and the free ends of a plurality of metal wires are fixed to one end or both ends of the self-expanding mesh 121 .

[0053] It should be noted that metal wires are usually made of alloy materials, have good elasticity, and are not prone to plastic deformation or breakage. In addition, metal wire mesh has good visibility under X-rays, which can provide guidance for the operator and facilitate operation.

[0054] In one embodiment, the metal wire mesh may include nickel-titanium alloy, copper-zinc-aluminum alloy, copper-aluminum-nickel alloy, etc.

[0055] In one embodiment, the self-expanding mesh 121 may also include a shape memory mesh made of polymers such as polyvinyl alcohol and polyurethane.

[0056] Figure 3 This is a schematic diagram of the structure of a positioning catheter and a microcatheter provided by an exemplary embodiment of the present application. Figure 3 As shown, the self-expanding mesh body 121 includes a proximal end, a distal end, and an outer peripheral surface 1211 located between the proximal end and the distal end. The proximal end and the distal end of the self-expanding mesh body 121 are both gradually reduced configurations that converge from the outer peripheral surface to one side. The proximal end of the self-expanding mesh body 121 converges to the first tube body 110, and the distal end of the self-expanding mesh body 121 converges to the distal port 1212, and the distal port 1212 is connected to the first tube body 110. The outer peripheral surface 1211 is used to abut the inner wall of the blood vessel 300 in the expanded state, and can automatically adapt to the inner cavity of the blood vessel by elastic deformation, improve the positioning stability, and provide stable support for the microcatheter 210, which is particularly beneficial when the microcatheter extends out of the positioning body and moves toward the target lesion site, so as to keep the microcatheter 210 still in the center of the blood vessel cavity after extending out of the positioning body. In addition, the communication between the distal port 1212 and the first tube body 110 is conducive to the control and regulation of the catheter or other components passing therein, such as adjusting the length of extension or retraction. Another advantage of this embodiment is that the self-expanding mesh 121 does not block blood flow, so the operator can treat the lesion during a longer treatment window without worrying about damage to the vascular tissue due to prolonged ischemia.

[0057] like Figure 1 As shown, the outer peripheral surface 1211 and the distal end of the self-expanding mesh 121 are both suspended outside the distal end of the first tube 110. On the one hand, the expansion and compression of the self-expanding mesh 121 are basically not hindered by the space of the first tube 110, which is conducive to the release of the outer peripheral surface 1211 and the distal end of the self-expanding mesh 121 into the blood vessel lumen. On the other hand, in the working state, the distal outer side of the first tube 110 can provide an axial force to the self-expanding mesh 121 through the proximal end of the self-expanding mesh 121 to strengthen the internal tension of the self-expanding mesh 121, provide a stronger anchoring force for the self-expanding mesh 121 in the blood vessel lumen, and make the shape of the self-expanding mesh 121 in the blood vessel lumen more stable, thereby maintaining the spatial position of the distal end 1212 of the self-expanding mesh 121 stable, reducing interference with the microcatheter passing therethrough.

[0058] like Figure 3 As shown, the self-expanding mesh 121 is a cage-shaped mesh formed by braided wires, which is not prone to deformation and collapse during the process of supporting the blood vessel 300, thereby improving the support stability.

[0059] like Figure 3 As shown, the self-expanding mesh 121 includes a plurality of preformed alloy wires 12111, which extend from the proximal end of the self-expanding mesh 121 through the outer peripheral surface 1211 to the distal end of the self-expanding mesh 121. The preformed alloy wires 12111 can be woven into the self-expanding mesh 121 and are basically distributed in an axial extension. The preformed alloy wires 12111 can have stronger elastic stress than other braided wires, similar to elastic beams, to provide the self-expanding mesh 121 with enhanced elastic deformation ability, driving the self-expanding mesh 121 to be more easily and stably supported and positioned in the vascular lumen.

[0060] In one embodiment, the outer walls of a plurality of preformed alloy wires 12111 may form the aforementioned outer peripheral surface.

[0061] like Figure 3 As shown, the distal port 1212 and / or the self-expanding mesh body 121 are coaxial with the first tube body 110 ( Figure 3 In this way, after the multi-self-expanding mesh body 121 is deployed in a direction away from the axis of the first tube body 110, the microcatheter 210 can be located at the distal port 1212 and / or the middle of the self-expanding mesh body 121, so that the microcatheter 210 can be centrally arranged in the blood vessel 300, and the microcatheter 210 can be more accurately arranged in the middle of the blood vessel 300. In addition, the diameter of the distal port 1212 is not less than the diameter of the first tube body 110, which can ensure that the distal port 1212 will not affect the telescopic movement of the microcatheter 210 extending from the first tube body 110.

[0062] Figure 4 A schematic structural diagram of a positioning body provided for an exemplary embodiment of the present application. Figure 5 This is a schematic diagram of the structure of a positioning body provided by another exemplary embodiment of the present application. Figures 3 to 5 As shown, the positioning body 120 may include a first ring 122 and a second ring 123, the first ring 122 is sleeved on the outer periphery of the distal tube body of the first tube body 110, the second ring 123 is sleeved on the first ring 122, and the proximal end portion of the self-expanding mesh body 121 is clamped and fixed between the first ring 122 and the second ring 123. In this way, the first tube body 110 and the positioning body 120 can be connected and fixed, and in addition, the first ring 122 and the second ring 123 can limit the self-expanding mesh body 121 from spreading, ensuring that the self-expanding mesh body 121 has a stable self-expanding property.

[0063] Figure 6 This is a schematic diagram of the structure of the first ferrule, the first tube body and the adhesive layer provided by an exemplary embodiment of the present application. Figure 6As shown, an adhesive layer 124 is applied between the inner wall of the first ferrule 122 and the outer wall of the first tube body 110, and the adhesive layer 124 adheres and fixes the first ferrule 122 and the first tube body 110. In this way, the connection stability between the inner wall of the first ferrule 122 and the outer wall of the first tube body 110 can be improved, and the situation where the first ferrule 122 is separated from the first tube body 110 can be reduced.

[0064] In one embodiment, the adhesive layer 124 may be formed by applying glue; or, the adhesive layer 124 may be formed by welding; or, the adhesive layer 124 may be formed by hot melt adhesive.

[0065] Figure 7 This is a schematic diagram of the structure of a positioning body provided by another exemplary embodiment of the present application. Figure 3 , Figure 4 as well as Figure 7 As shown, the positioning body 120 may include a third ring 125 and a fourth ring 126, the microcatheter 210 is slidably inserted into the third ring 125, the fourth ring 126 is sleeved on the third ring 125, and the distal end of the self-expanding mesh 121 is partially disposed between the third ring 125 and the fourth ring 126 and is clamped and fixed to form the aforementioned distal port 1212. In this way, the third ring 125 and the fourth ring 126 can limit the self-expanding mesh 121 from spreading, ensuring that the self-expanding mesh 121 has a stable self-expanding property.

[0066] Figure 8 A schematic diagram of the structure of the shock wave system and blood vessels provided by an exemplary embodiment of the present application. Fig. 9 The structure diagram of the shock wave system provided by an exemplary embodiment of the present application is shown in FIG. Figure 3 , Figure 8 as well as Fig. 9 As shown, the shock wave system 200 provided in the embodiment of the present application may include the positioning catheter 100 described in the aforementioned embodiment, and has all the functions of the positioning catheter 100. The beneficial effects of the shock wave system 200 can refer to the beneficial effects of the aforementioned positioning catheter 100.

[0067] like Figure 3 , Figure 8 as well as Fig. 9 As shown, the shock wave system 200 may further include a microcatheter 210, which is slidably disposed in the first tube body 110 and the positioning body 120. A shock wave transmitter is disposed at the distal end of the microcatheter 210, and the shock wave transmitter can emit shock waves, which reach the lesion site 400 and have a therapeutic effect.

[0068] like Figure 3 , Figure 8 as well as Fig. 9As shown, the shock wave system 200 may further include a second tube body 220, the first tube body 210 may be slidably matched to the inner cavity of the second tube body 220, and the self-expanding mesh body 121 may be compressed and gathered in the second tube body 220. It should be understood that during the sliding process of the first tube body 110 relative to the second tube body 220, the positioning body 120 may be driven to extend out of the second tube body 220, or the positioning body 120 may be driven to retract into the second tube body 220.

[0069] It should be noted that if Figure 3 , Figure 8 as well as Fig. 9 As shown, when the self-expanding mesh 121 follows the first tube body 110 to retract into the second tube body 220, the self-expanding mesh 121 can be in a contracted state under the pressure of the tube wall of the second tube body 220, which is convenient for storage; when the self-expanding mesh 121 follows the first tube body 110 to extend out of the second tube body 220, based on the property of the self-expanding mesh 121 to restore its initial shape, the self-expanding mesh 121 can automatically expand to an expanded state.

[0070] In actual application, after the catheter assembly is extended into the blood vessel 300, the second tube body 220 is withdrawn, so that the distal end of the first tube body 110 and the self-expanding mesh 121 extend out of the second tube body 220, and the self-expanding mesh 121 automatically expands to an expanded state. The expanded self-expanding mesh 121 is tightly attached to the inner wall of the blood vessel 300, so that the microcatheter 210 is located in the middle of the blood vessel 300, thereby preventing the microcatheter 210 from causing damage to the blood vessel 300.

[0071] like Figure 8 As shown, the shock wave system 200 further includes a guide wire 230, the proximal end of which is connected to the distal end of the microcatheter 210. In practical applications, the guide wire 230 can abut against the lesion 400, and the guide wire 230 can be connected to the shock wave transmitter to transmit the shock wave to the lesion 400.

[0072] In one embodiment, the guide wire 230 may also be disposed through the inner cavity of the microcatheter 210 and may extend out of the distal end of the microcatheter 210 .

[0073] In one embodiment, the axis of the guidewire 230 is on the same straight line as the axis of the microcatheter 210. Under the positioning effect of the self-expanding mesh 121, the microcatheter 210 is centered in the blood vessel 300. Correspondingly, the guidewire 230 is also centered in the blood vessel 300, effectively avoiding damage to the inner wall of the blood vessel 300 by the guidewire 230.

[0074] like Figure 8As shown, the shock wave system 200 may further include an active control console 240, which is connected to the proximal end of the microcatheter 210. The active control console 240 may send a control current signal to the microcatheter 210. After the microcatheter 210 receives the control current signal, the shock wave transmitter at the distal end of the microcatheter 210 may generate a shock wave.

[0075] Fig.10 The schematic diagram of the structure of the micro-catheter provided by an exemplary embodiment of the present application. Fig.10 As shown, the microcatheter 210 may include an outer tube layer 211, an inner tube layer 212 and a shock wave transmitter 213. The inner tube layer 212 is sleeved in the outer tube layer 211. The shock wave transmitter 213 is arranged between the outer tube layer 211 and the inner tube layer 212. The shock wave transmitter 213 receives a control current signal and then emits a shock wave.

[0076] In one embodiment, the shock wave transmitter 213 may include an electrode pair 2131 exposed at the distal end of the microcatheter 210 , and the electrode pair 2131 is used to receive a control current signal and generate shock waves.

[0077] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0078] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0079] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0080] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0081] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A positioning catheter, characterized in that: include: first tube body; The positioning body is connected to the distal end of the first tube body. The positioning body includes a self-expanding mesh body arranged outside the first tube body. The self-expanding mesh body is used to be in a contracted state when constrained by external pressure, and automatically expand to an expanded state after the external pressure is removed.

2. The positioning catheter according to claim 1, characterized in that: The self-expanding mesh body comprises a metal wire braided mesh, and the free ends of a plurality of metal wires are fixed to one end or both ends of the self-expanding mesh body.

3. The positioning catheter according to claim 1, characterized in that: The self-expanding mesh body includes a proximal end and a distal end, and an outer edge circumference located between the proximal end and the distal end. The proximal end and the distal end of the self-expanding mesh body are both gradually narrowing structures that converge to one side from the outer edge circumference. The proximal end of the self-expanding mesh body converges to the first tube body, and the distal end of the self-expanding mesh body converges to the distal port, and the distal port is connected to the first tube body.

4. The positioning catheter according to claim 3, characterized in that: The distal port and / or the self-expanding mesh body are coaxial with the first tube body, and the diameter of the distal port is not less than the diameter of the first tube body.

5. The positioning catheter according to any one of claims 1 to 4, characterized in that: The positioning body comprises: A first collar, sleeved on the outer circumference of the distal end of the first tube; A second ring, sleeved on the first ring; Wherein, the proximal end portion of the self-expanding mesh is disposed between the first loop and the second loop and is clamped and fixed.

6. The positioning catheter according to claim 5, characterized in that: An adhesive layer is coated between the inner wall of the first ferrule and the outer wall of the first tube body, and the first ferrule and the first tube body are bonded and fixed.

7. The positioning catheter according to any one of claims 1 to 4, characterized in that: The positioning body also includes: The third set of circles; A fourth ring, sleeved on the third ring; Wherein, the distal end portion of the self-expanding mesh body is disposed between the third loop and the fourth loop and is clamped and fixed to form a distal end portion.

8. The positioning catheter according to claim 3, characterized in that: The outer peripheral surface and the distal end of the self-expanding mesh body are both suspended outside the distal end of the first tube body.

9. The positioning catheter according to claim 3, characterized in that: The self-expanding mesh body is in a cage shape formed by braiding wires.

10. The positioning catheter according to claim 3, characterized in that: The self-expanding mesh includes a plurality of preformed alloy wires, and the preformed alloy wires extend from the proximal end of the self-expanding mesh through the outer edge circumference to the distal end of the self-expanding mesh.

11. A shock wave system, characterized in that: include: A positioning catheter as claimed in any one of claims 1 to 10; A second tube body, wherein the first tube body can be slidably disposed in the inner cavity of the second tube body, and the self-expanding mesh body can be compressed and gathered in the second tube body; The microcatheter is slidably arranged in the inner cavity of the first tube body and the positioning body, and a shock wave transmitter is arranged at the distal end of the microcatheter.

12. The shock wave system according to claim 11, characterized in that The shock wave system further comprises: A guide wire, the proximal end of which is connected to the distal end of the microcatheter, or the guide wire is arranged to penetrate the inner cavity of the microcatheter and can extend out of the distal end of the microcatheter.

13. The shock wave system according to claim 11, characterized in that The microcatheter comprises: Outer tube layer; An inner tube layer, located on the inner periphery of the outer tube layer; The shock wave transmitter is arranged between the outer tube layer and the inner tube layer. The shock wave transmitter comprises an electrode pair exposed at the distal end of the micro-catheter and is used for emitting shock waves.

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