Guidance system for guidewire transvalvular devices and interventional instruments

Abstract

The present application discloses a guidewire transvalvular device, including a catheter and a plurality of supporting wires, wherein the catheter has a relative distal end and a proximal end, and the catheter has a plurality of side channels and a main channel for the guidewire to pass through, and the side wall of each side channel has an open area at a position adjacent to the distal end of the catheter; each supporting wire is passed through the corresponding side channel, and is extended from the proximal end of the catheter to be fixed to the distal end of the catheter, and each supporting wire has: a storage state in the side channel; and an expanded state extending out of the side channel through the open area, in which each supporting wire expands radially outward along the main channel into a three-dimensional structure. Compared with the prior art, this solution has at least three supporting points between the guidewire transvalvular device and the surrounding tissue to ensure that the distal opening of the main channel is at or near the geometric center of the surrounding tissue, and when the guidewire can reach the aortic valve through the main channel, it is convenient for the guidewire to pass through the aortic valve.

Description

Technical Field

[0001] The present application relates to the field of medical equipment, and in particular to a guide wire transvalvular device and a guidance system for interventional instruments. Background Art

[0002] Interventional surgery causes little trauma to the human body and is less invasive. It is a commonly used medical technology nowadays. It usually requires a special delivery system to deliver diagnostic and treatment equipment, implantable devices, etc. to the lesion site for corresponding treatment or auxiliary treatment operations.

[0003] The general delivery system mainly includes a sheath tube and a sheath core located inside the sheath tube, and the proximal ends of the sheath tube and the sheath core extend to the operating handle. Taking interventional aortic valve replacement surgery as an example, during the surgery, a thinner guide wire is inserted through the femoral artery in advance, and the front end of the guide wire enters the left ventricle after passing through the aortic valve. After that, the sheath tube loaded with the aortic valve is sent along the guide wire until it reaches the aortic valve, and then the sheath tube is withdrawn to release the stent.

[0004] When the aortic valve is calcified or diseased, the inner diameter of the aortic valve will shrink. During surgery, there will be certain operational difficulties when the guidewire crosses the narrower aortic valve, which may affect the success rate of the surgery. Summary of the invention

[0005] In order to solve the above technical problems, the present application discloses a guidewire transvalvular device, comprising:

[0006] A catheter having a distal end and a proximal end opposite to each other, the catheter having a plurality of side channels and a main channel for the guide wire to pass through, the side wall of each side channel having an open area near the distal end of the catheter;

[0007] A plurality of support wires, each support wire is inserted into a corresponding secondary channel and extends from the proximal end of the catheter to be fixed to the distal end of the catheter. Each support wire has the following features at the distal end of the catheter:

[0008] In the storage state in the secondary channel;

[0009] And the expanded state in which the secondary channel extends through the open area, in which each supporting wire expands radially outward along the main channel to form a three-dimensional structure.

[0010] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0011] Optionally, the catheter is a multi-lumen tube, and each lumen of the multi-lumen tube corresponds to each channel respectively.

[0012] Optionally, the secondary channels are arranged at intervals around the circumference of the main channel.

[0013] Optionally, along the radial direction of the conduit, each open area is located on the outer side wall of the conduit and is arranged along the circumference of the conduit;

[0014] The central angle of the secondary channel where the open area is located is greater than 120 degrees.

[0015] Optionally, along the axial direction of the catheter, the length of the open area is 4 mm-10 mm;

[0016] The support wire is fixed to the distal end of the catheter by melting, welding, gluing or fasteners.

[0017] Optionally, each support wire has a predetermined shaped segment at the distal end of the catheter, and the predetermined shaped segment self-expands into the three-dimensional structure in the deployed state.

[0018] Optionally, in the unfolded state, each support wire is bent and radially distributed to form a three-dimensional cage structure, and define the outer contour of the cage structure;

[0019] The number of the supporting wires is 3 to 8.

[0020] Optionally, in the unfolded state, the support wires are equidistantly distributed in the circumferential direction of the mesh cage structure.

[0021] Optionally, in the unfolded state, the outer contour of the mesh cage structure is roughly a rotating body, and each supporting wire corresponds to a generatrix of the rotating body;

[0022] The generatrix is ​​a smooth curve.

[0023] Optionally, the guidewire transvalvular device further comprises a handle, and the handle is fixedly connected to the proximal end of the catheter;

[0024] A driving member is slidably installed in the handle, and the driving member is fixedly connected to the proximal end of each supporting wire.

[0025] Optionally, the support body is provided with scale markings indicating the relative position of the driving member.

[0026] This application also provides the following technical solutions:

[0027] A guiding system for an interventional instrument comprises a guidewire and a guidewire transvalvular device using any one of the above items, wherein the guidewire is movably arranged in the main channel.

[0028] The guidewire transvalvular device disclosed in the present application has at least three supporting points between itself and the surrounding tissues in the circumferential direction to ensure that the distal opening of the main channel is at or near the geometric center of the surrounding tissues, so that the guidewire can reach the aortic valve through the main channel, which facilitates the guidewire to pass through the aortic valve.

[0029] The specific beneficial technical effects will be further explained in the specific implementation methods in combination with specific structures or steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of a guidewire transvalvular device in an embodiment provided in the present application;

[0031] Figure 2 A schematic diagram of the structure of a guidewire transvalvular device in an embodiment provided in the present application;

[0032] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the middle conduit;

[0033] Figure 4 This is a view of the guidewire transvalvular device in use in the surrounding tissue according to one embodiment of the present application.

[0034] The reference numerals in the figures are described as follows:

[0035] 100, guide wire transvalvular device; 101, guide wire;

[0036] 10. catheter; 11. distal end; 12. proximal end; 13. secondary channel; 14. main channel; 15. open area;

[0037] 20. Supporting wire; 21. Three-dimensional structure;

[0038] 30. Peripheral tissue; 31. Aortic valve; 32. Right coronary artery; 33. Left coronary artery. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0042] Reference Figure 1 To Attachment Figure 3 As shown, the present application discloses a guidewire transvalvular device 100, comprising:

[0043] The catheter 10 has a distal end 11 and a proximal end 12 opposite to each other. The catheter 10 has a plurality of side channels 13 and a main channel 14 for the guide wire 101 to pass through. The side wall of each side channel 13 has an open area 15 near the distal end 11 of the catheter 10.

[0044] A plurality of support wires 20, each support wire 20 is inserted into a corresponding secondary channel 13, and extends from the proximal end 12 of the catheter 10 to be fixed to the distal end 11 of the catheter 10, and each support wire 20 has the following features at the distal end 11 of the catheter 10:

[0045] In the storage state in the secondary channel 13;

[0046] And the expanded state in which the secondary channel 13 extends through the open area 15 , in which each support wire 20 expands radially outward along the main channel 14 to form a three-dimensional structure 21 .

[0047] The following embodiments are described for ease of description using interventional aortic valve replacement surgery as an example, but are of course also applicable to other scenarios (such as the mitral valve, tricuspid valve, etc.), especially when the distal end of the guidewire 101 needs to pass through the valve.

[0048] Unless otherwise specified, the "distal end" in this embodiment and the following embodiments refers to the end close to the lesion, that is, away from the operator, and the "proximal end" refers to the opposite.

[0049] During the interventional surgery, the distal end 11 of the catheter 10 reaches the aortic valve 31 in advance, and then each support wire 20 expands outward through the open area 15 of the catheter 10 until it is in an expanded state, and each support wire 20 forms a three-dimensional structure 21 in the expanded state. In order to avoid safety hazards, the outer contour of the three-dimensional structure 21 is generally an arc surface, and the three-dimensional structure 21 is against the surrounding tissue (such as blood vessels) when in use.

[0050] The three-dimensional structure 21 has at least three supporting points between itself and the surrounding tissue in the circumferential direction to ensure that the distal opening of the main channel 14 is at or near the geometric center of the aortic valve 31 (ignoring the irregular cross-section of the surrounding tissue, the geometric center of the surrounding tissue is the center of the circle of the cross-section of the surrounding tissue). When the guide wire 101 can reach the aortic valve 31 through the main channel 14, it is convenient for the guide wire 101 to pass through the aortic valve 31.

[0051] The elongated catheter 10 is made of elastic material so that the catheter 10 can pass through the surrounding tissues, and the main channel 14 and the auxiliary channels 13 in the catheter 10 are arranged in parallel. The length of the support wire 20 is longer than the length of the auxiliary channel 13 and is exposed at the proximal end 12 of the catheter 10, so that the operator can manipulate the support wires 20. In the stored state, along the axial direction of the catheter 10, the length of each support wire 20 in the open area 15 is equal to the length of the open area 15.

[0052] Of course, in some other embodiments, the guidewire 101 can also reach the aortic valve 31 in advance, and the catheter 10 can reach the aortic valve 31 along the surrounding tissue through the guidewire 101. Then, each support wire 20 expands outward through the open area 15 of the catheter 10 until it is in an expanded state. After the three-dimensional structure 21 abuts against the inner wall of the surrounding tissue, to ensure that the distal end of the guidewire 101 is at or near the geometric center of the surrounding tissue, the guidewire 101 is pushed to pass through the aortic valve 31.

[0053] The catheter 10 has a cavity, and a plurality of pipes are arranged in the cavity, each of which has a cavity, and the cavity of each pipe corresponds to each channel. In order to ensure that each support wire 20 stably extends from the open area 15 to the secondary channel 13, each pipe needs to be relatively fixed to the catheter 10, which will make the processing technology of the guide wire transvalvular device 100 complicated. In order to solve this technical problem, refer to the attached Figure 3 In this embodiment, the catheter 10 is a multi-lumen tube, and each lumen of the multi-lumen tube corresponds to each channel. The catheter 10 is integrally formed by connecting the main channel 14 and the secondary channel 13 during processing, which can not only reduce the difficulty of the processing technology of each channel, but also ensure that the relative positions between the channels remain unchanged.

[0054] The cavities of the multi-lumen tube extend from the distal end 11 to the proximal end 12 of the catheter 10 and are open at both ends of the catheter 10. The number of cavities is the same as the number of channels, where the channels refer to the main channel 14 and the secondary channel 13.

[0055] Reference Figure 1 To Attachment Figure 3In this embodiment, each auxiliary channel 13 is arranged at intervals around the circumference of the main channel 14. At the same time, each support wire 20 is pushed so that each support wire 20 is synchronously expanded radially outward along the main channel 14 to reduce the difficulty of operating the guidewire transvalvular device 100. Each auxiliary channel 13 is arranged in an annular array around the main channel 14, and the center of the annular array coincides with the axis of the main channel 14.

[0056] In order to ensure that each support wire 20 expands radially outward along the main channel 14, refer to the attached Figure 1 Referring to one embodiment, along the radial direction of the conduit 10, each open area 15 is located on the outer wall of the conduit 10 and arranged along the circumference of the conduit 10; the central angle of the secondary channel 13 where the open area 15 is located is greater than 120 degrees. Preferably, the central angle of the secondary channel 13 where the open area 15 is located is greater than 150 degrees. For example, in Figure 3, the central angle of the secondary channel 13 where the open area 15 is located is 180 degrees.

[0057] When the length of the three-dimensional structure 21 along the axial direction of the catheter 10 is too short, the three-dimensional structure 21 may not be able to resist the surrounding tissue, affecting the position of the distal end of the main channel 14; when the length of the three-dimensional structure 21 along the axial direction of the catheter 10 is too long, the distance between the point where the three-dimensional structure 21 contacts the surrounding tissue and the aortic valve 31 is too long, and when the surrounding tissue here bends in the axial direction, it may also affect the distal end position of the main channel 14. Along the axial direction of the catheter 10, the two ends of the open area 15 limit the length of the three-dimensional structure 21, so the length of the open area 15 directly affects the length of the three-dimensional structure 21. Referring to one embodiment, along the axial direction of the catheter 10, the length of the open area 15 is 4mm-10mm, and the length of the open area 15 along the axial direction of the catheter 10 is limited by factors such as the diameter of the surrounding tissue and the diameter of the catheter 10. Preferably, the length of the open area 15 is 4mm-10mm.

[0058] Regarding the fixing method of the distal end of the support wire 20 and the catheter 10, referring to one embodiment, the support wire 20 is fixed to the distal end 11 of the catheter 10 by melting, welding, gluing or fasteners.

[0059] When the support wire 20 is fixed to the distal end 11 of the catheter 10, the distal end of the support wire 20 is placed in the distal end of the auxiliary channel 13 to reduce the radial dimension of the catheter 10 so that the guidewire transvalvular device 100 has a compact structure. For example, when the support wire 20 is fixed to the distal end 11 of the catheter 10 by melting, at least the material of the catheter 10 is a medical plastic material, the distal end of the support wire 20 is placed in the distal end of the auxiliary channel 13, and then the support wire 20 is tightened by melting the inner wall of the auxiliary channel 13 so that the support wire 20 can be fixed to the distal end 11 of the catheter 10.

[0060] In order to form a three-dimensional structure 21 at the distal end 11 of the catheter 10, each support wire 20 has a predetermined section at the distal end 11 of the catheter 10, and the predetermined section expands into a three-dimensional structure 21 in the unfolded state. Each support wire 20 can be heat-set into a desired initial shape, and the support wire 20 returns to the initial shape in the body environment, which can reduce the human interference in the formation of the three-dimensional structure 21 during the operation, so that the formation of the three-dimensional structure 21 is more accurate. Referring to one embodiment, the support wire 20 uses a memory alloy, such as nickel-titanium wire.

[0061] Of course, in other embodiments, each support wire 20 runs synchronously in the corresponding secondary channel 13 and is relatively fixed at the proximal end 12 of the catheter 10. After the guidewire transvalvular device 100 moves to the predetermined position, the operator can push each support wire 20, and each support wire 20 is released in the open area 15 of the catheter 10 to form a three-dimensional structure 21. By pushing the distance of each support wire 20, the radial size of the three-dimensional structure 21 in the catheter 10 can be adjusted according to the inner diameter of the surrounding tissue to increase the application scenario of the guidewire transvalvular device 100; when the guidewire transvalvular device 100 is recovered, only each support wire 20 is pulled until each support wire 20 is in a retracted state.

[0062] The relative fixation of each support wire 20 at the proximal end 12 of the catheter 10 can ensure the synchronous operation of each support wire 20. The synchronous movement of each support wire 20 means that the movement speed and movement distance of each support wire 20 are the same. The synchronization of each support wire 20 can ensure that the size of the three-dimensional structure 21 in the radial direction of the catheter 10 remains consistent, avoiding a sudden change of the three-dimensional structure 21 in the radial direction of the catheter 10 to affect the position of the distal opening of the main channel 14.

[0063] In order to enable each support wire 20 to move, the operator can directly or indirectly drive each support wire 20. Regarding driving each support wire 20 to move, please refer to the specific description of the handle below, which will not be expanded here.

[0064] In this embodiment, each support wire 20 is cut from a metal tube. The metal tube includes a cut section and an uncut section along its length, and each support wire 20 is cut on the cut section. After each support wire 20 extends into the corresponding secondary channel 13, the uncut section is exposed to the proximal end 12 of the catheter 10, so as to be connected to the external handle.

[0065] In this embodiment, in the unfolded state, each support wire 20 is bent and radially distributed to form a three-dimensional cage structure and define the outer contour of the cage structure.

[0066] The mesh cage structure has an axial direction consistent with the extension direction of the catheter 10, and all the support wires 20 are gathered at both ends of the axial direction of the mesh cage structure in the expanded state. In the expanded state, the part of each support wire 20 in the open area 15 defines the outer contour of the mesh cage structure by bending itself. The bent part of the support wire 20 is arranged in an arc shape, and the parts of the same support wire 20 are all in the same plane, so that each support wire 20 is radially distributed when bent.

[0067] In this embodiment, the number of support wires 20 is 3 to 8. The three-dimensional structure 21 forms at least 3 support points with the surrounding tissues to increase the support points between the guidewire transvalvular device 100 and the surrounding tissues, so as to disperse the stress of the guidewire transvalvular device 100 on the surrounding tissues, reduce damage to the surrounding tissues, and limit the radial movement of the cage structure along the surrounding tissues. Preferably, the number of support wires 20 is three, the number of auxiliary channels 13 is three, and the number of corresponding open areas 15 is three.

[0068] In this embodiment, in the expanded state, the support wires 20 are evenly distributed in the circumferential direction of the mesh cage structure. In the expanded state, when the support wires 20 are against the surrounding tissue, the force on the support wires 20 is uniform, and the forces received are all directed to the axial direction of the mesh cage structure, so that the mesh cage structure is not easily deformed. In order to ensure that the support wires 20 at both ends of the axial direction of the mesh cage structure are evenly distributed, the secondary channels 13 are evenly distributed along the circumferential direction of the catheter 10. Referring to one of the embodiments, along the axial direction of the mesh cage, the support wires 20 are evenly distributed in the circumferential direction of the mesh cage structure.

[0069] In this embodiment, in the unfolded state, the outer contour of the mesh cage structure is roughly a rotating body, and each supporting wire 20 corresponds to the generatrix of the rotating body; the generatrix is ​​a smooth curve.

[0070] Along the circumference of the catheter 10, there is a certain gap between adjacent support wires 20. Ignoring the gap, the mesh cage structure can be regarded as a rotating body in which the support wires 20 rotate around the axial direction of the catheter 10. The rotating body has an axial direction consistent with the extension direction of the catheter 10. The extension direction of each support wire 20 is the generatrix of the rotating body. The smooth curve avoids stabbing the surrounding tissue and can fit the surrounding tissue well. Referring to one embodiment, both ends of the mesh cage structure are smoothed to facilitate storage in the catheter 10.

[0071] In this embodiment, the guidewire transvalvular device 100 also includes a handle, which is fixedly connected to the proximal end 12 of the catheter 10 ; a driving member is slidably installed in the handle, and the driving member is connected to the proximal end of each supporting wire 20 .

[0072] After the guidewire transvalvular device 100 is sent into the human body and moved to the vicinity of the aortic valve, the driving member on the handle controls the synchronous movement of each support wire 20 to complete the expansion state of the support wire 20; after the guidewire 101 passes through the aortic valve, when the guidewire transvalvular device 100 needs to be recovered, it is necessary to pull each support wire 20 back to the retracted state through the driving member on the handle.

[0073] The handle can provide support for various components (such as the catheter 10, the drive member and the support wire 20), and can also provide a gripping space for the operator, so there is no strict restriction on the specific shape and structure of the handle, for example, a cylindrical structure or a frame structure can be adopted, and the general principle is that it should at least have sufficient mechanical strength and ensure a firm connection with various components (such as the catheter 10, the drive member and the support wire 20). The handle itself can be an integrated structure or a detachable split structure, and can be connected by bolts, pins, etc. for easy disassembly.

[0074] The driving member is mainly used to drive the multiple support wires 20 to reciprocate along the axial direction of the catheter 10. In order to achieve the basic function, a motor, a cylinder, a hydraulic cylinder or even a manual driving member can be selected in the prior art. When the motion mode directly output by the driving member is inconsistent with the motion mode of each support wire 20, an appropriate transmission member can be used to convert and transmit the motion mode. Referring to one embodiment, the driving member is a manual driving member, part of which extends into the handle and is connected to each support wire 20, and part of which is exposed outside the handle for the operator to push and pull.

[0075] During the recovery of the guidewire transvalvular device 100, after each support wire 20 is in the storage state, if the driving member continues to drive each support wire 20 to move, the wall of the catheter 10 will be stacked, causing the radial size of the catheter 10 to increase, which will affect the recovery of the guidewire transvalvular device 100 and cause safety hazards; similarly, during the placement of the guidewire transvalvular device 100, after each support wire 20 is in the expanded state, if the driving member continues to drive each support wire 20 to move, the radial size of the three-dimensional structure 21 will continue to increase, causing safety hazards. In order to solve this technical problem, referring to one embodiment, the support body is provided with a scale mark indicating the relative position of the driving member.

[0076] The scale mark facilitates the operator to quickly read the sliding distance of the driving member, and then judge the unfolding state and the storage state of each support wire 20. Among them, the scale mark is engraved near the driving member by grooving, laser engraving or painting, and is arranged along the sliding direction of the driving member.

[0077] Reference Figure 1One embodiment of the present application also provides a guiding system for an interventional device, including a guidewire 101 and a guidewire transvalvular device 100 provided in each of the above embodiments, wherein the guidewire 101 is movably arranged in the main channel 14. In the interventional surgery, the distal end 11 of the catheter 10 reaches the aortic valve 31 in advance, and then each support wire 20 expands outward through the open area 15 of the catheter 10 until it is in an expanded state, and each support wire 20 forms a three-dimensional structure 21 in the expanded state, and the three-dimensional structure 21 has at least three supporting points between itself and the surrounding tissue in the circumferential direction, so as to ensure that the distal opening of the main channel 14 is at or near the geometric center of the aortic valve 31, and when the guidewire 101 can reach the aortic valve 31 through the main channel 14, it is convenient for the guidewire 101 to pass through the aortic valve.

[0078] Reference Figure 4 The following describes the application of the guidewire transvalvular device 100 in aortic valve 31 replacement surgery:

[0079] The distal end 11 of the catheter 10 reaches the aortic valve 31 in advance, and then the three support wires 20 are anchored in the right coronary sinus 32, the left coronary sinus 33 and the bottom of the non-coronary sinus in the expanded state, so that the distal opening of the main channel 14 on the catheter 10 is at the geometric center of the aortic valve 31. When the guidewire 101 can reach the aortic valve 31 through the main channel 14, it is convenient for the guidewire 101 to pass through the aortic valve 31.

[0080] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0081] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A guidewire transvalvular device, characterized in that: include: A catheter having a distal end and a proximal end opposite to each other, the catheter having a plurality of side channels and a main channel for the guide wire to pass through, the side wall of each side channel having an open area near the distal end of the catheter; A plurality of support wires, each support wire is inserted into a corresponding secondary channel and extends from the proximal end of the catheter to be fixed to the distal end of the catheter. Each support wire has the following features at the distal end of the catheter: In the storage state in the secondary channel; And the expanded state of the secondary channel extending through the open area, in which each support wire expands radially outward along the main channel to form a three-dimensional structure; the catheter is a multi-lumen tube, each cavity of the multi-lumen tube corresponds to each channel respectively; each secondary channel is arranged at intervals around the circumference of the main channel.

2. The guidewire transvalvular device according to claim 1, characterized in that: Along the radial direction of the conduit, each open area is located on the outer side wall of the conduit and is arranged along the circumference of the conduit; The central angle of the secondary channel where the open area is located is greater than 120 degrees.

3. The guidewire transvalvular device according to claim 1, characterized in that: Along the axial direction of the catheter, the length of the open area is 4mm-10mm; the support wire is fixed to the distal end of the catheter by melting, welding, gluing or fasteners.

4. The guidewire transvalvular device according to claim 1, characterized in that: Each support wire has a predetermined section at the distal end of the catheter, and the predetermined section expands into the three-dimensional structure in the deployed state.

5. The guidewire transvalvular device according to claim 1, characterized in that: In the unfolded state, each support wire is bent and radially distributed to form a three-dimensional cage structure and define the outer contour of the cage structure; The number of the supporting wires is 3 to 8.

6. The guidewire transvalvular device according to claim 1, characterized in that: In the unfolded state, the outer contour of the mesh cage structure is a rotating body, and each supporting wire corresponds to the generatrix of the rotating body; The generatrix is ​​a smooth curve.

7. The guidewire transvalvular device according to any one of claims 1 to 6, characterized in that: The guidewire transvalvular device also includes a handle, and the handle is fixedly connected to the proximal end of the catheter; A driving member is slidably installed in the handle, and the driving member is fixedly connected to the proximal end of each supporting wire.

8. A guidance system for an interventional device, characterized in that: It comprises a guidewire and a guidewire transvalvular device as described in any one of claims 1 to 7, wherein the guidewire is movably arranged in the main channel.

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