A cutting guide wire

Abstract

The application relates to a cutting guide wire, which comprises a core wire body in a cylindrical wire structure, the core wire body is provided with cutting grooves at intervals along the axial direction, and the cutting grooves arranged at intervals along the core wire body have deflection in the circumferential direction of the core wire body. The cutting guide wire structure is more concise, the manufacturing process is simple, the passability is better, the cutting grooves have deflection in the circumferential direction of the core wire body, more than two cutting grooves are distributed in a spiral shape in the axial direction of the core wire body, the proximal torque can be more effectively transmitted to the distal end of the guide wire, the torque transmission is better, the torque transmission is more uniform, so that the operator can quickly establish a blood vessel passage, and the operation time is shortened. That is, the cutting guide wire can meet the requirements of better softness of the distal end of the guide wire and higher torque transmission efficiency, and the preparation of the core wire body can be completed only by cutting, so that the guide wire processing process is greatly simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a cutting guide wire. BACKGROUND

[0002] The present application provides a guide wire used in the process of establishing a neural interventional surgery access. Since intracranial blood vessels are relatively small and have many curved segments, the ability to quickly pass through the curved segments of the blood vessels to reach the lesion site becomes a standard for measuring the quality of the guide wire. Intracranial vascular diseases are increasingly common due to factors such as age and genetics. For example, an intracranial aneurysm will compress nerve tissue in the early stage before it ruptures. Aneurysms at different locations can cause corresponding pathological symptoms. For example, compressing the optic nerve will cause a dark shadow in the visual field, and in severe cases, blindness. Subarachnoid hemorrhage caused by aneurysm rupture will cause a stroke. Current intracranial aneurysm treatment methods are divided into surgical clipping and interventional therapy. Considering the slow healing of elderly patients after craniotomy, interventional therapy is often used. Interventional therapy devices are divided into auxiliary stent-assisted coil embolization, flow diversion device therapy, and braided embolization. The guide wire is used to deliver such devices to the lesion site to achieve the purpose of treatment.

[0003] Currently, the mainstream guide wire structure in the prior art is an alloy core wire plus a spring winding structure. In clinical use, the torque applied by the operator to the proximal end of the spring winding structure guide wire is transmitted to the distal end of the guide wire, and the transmission efficiency of the torque is low, which is not conducive to the operator's flexible control of the guide wire from the proximal end of the guide wire. SUMMARY

[0004] Therefore, the present application provides a cutting guide wire. The cutting guide wire comprises a core wire body; the core wire body is in a cylindrical wire structure, and a cutting groove is arranged at intervals along the axial direction of the core wire body; the cutting grooves arranged at intervals along the core wire body have a deflection in the circumferential direction of the core wire body; and the ratio of the maximum depth of the cutting groove in the radial direction of the core wire body to the diameter of the core wire body is less than or equal to 7 / 8.

[0005] In one possible implementation, the core wire body has one cutting groove at the same position in the axial direction, so that the cutting grooves at odd positions from the distal end to the proximal end of the core wire body form an odd groove group, and the cutting grooves at even positions from the distal end to the proximal end of the core wire body form an even groove group; the deflection angle between adjacent cutting grooves in the odd groove group is a first preset angle, and the first preset angle is less than or equal to 180°; and the deflection angle between adjacent cutting grooves in the even groove group is a second preset angle, and the second preset angle is less than or equal to 180°.

[0006] In a possible implementation, the first preset angle is equal to the second preset angle; and the deflection angle between the cutting groove of the first order from the distal end to the proximal end of the core wire body and the cutting groove of the second order is 30°, 45°, 60°, 90°, 120°, 135° or 180°.

[0007] In a possible implementation, two cutting grooves are arranged at the same axial position of the core wire body, and the two cutting grooves are symmetrically arranged along the axial direction of the core wire body.

[0008] In a possible implementation, the cutting grooves of the odd orders from the distal end to the proximal end of the core wire body form an odd groove group, the deflection angle between adjacent cutting grooves in the odd groove group is a third preset angle, and the third preset angle is between 6° and 45°; and the cutting grooves of the even orders from the distal end to the proximal end of the core wire body form an even groove group, the deflection angle between adjacent cutting grooves in the even groove group is a fourth preset angle, and the fourth preset angle is between 6° and 45°.

[0009] In a possible implementation, the third preset angle is equal to the fourth preset angle.

[0010] In a possible implementation, the deflection angle between the cutting groove in the odd groove group and the cutting groove adjacent to the proximal side of the even groove group is 30°, 45°, 60° or 90°.

[0011] In a possible implementation, the core wire body is provided with more than three cutting grooves at the same axial position, the cutting grooves are uniformly distributed in the circumferential direction of the core wire body, and the circumferentially adjacent cutting grooves of the core wire body are in communication with each other.

[0012] In a possible implementation, the maximum depth of the cutting groove gradually decreases from the distal end to the proximal end of the core wire body.

[0013] In a possible implementation, the cutting grooves are arranged at an interval gradually increasing from the distal end to the proximal end of the core wire body.

[0014] In a possible implementation, the outer periphery of the core wire body is covered with a developing layer, or the inner core of the core wire body has a developing wire.

[0015] The beneficial effects of the present application: by arranging the cutting grooves in the axial direction of the core wire body, compared with the traditional grinding core wire plus spring winding assembly guide wire, the cutting guide wire structure of the present application is more concise, the manufacturing process is simple, the cutting grooves arranged on the surface make it have better flexibility, better passability, easy for the operator to deliver the core wire body to the distal end and facilitate the subsequent delivery of the corresponding device. Moreover, the cutting grooves arranged in the axial direction of the core wire body have a deflection in the circumferential direction, that is, two or more cutting grooves are arranged in a spiral shape in the axial direction of the core wire body. When the operator applies a rotating torque at the proximal end, the proximal torque can be more effectively transmitted to the distal end of the guide wire, having better torque transmission performance and ensuring more uniform torque transmission, so as to facilitate the operator to manipulate the guide wire at the proximal end and quickly establish a vascular access, which is beneficial to shorten the operation time.

[0016] In summary, the cutting guide wire of the present application not only meets the requirements of better flexibility of the distal end of the guide wire and higher efficiency of torque transmission, but also only needs to be cut to complete the preparation of the core wire body, greatly simplifying the guide wire processing process.

[0017] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and serve to explain the principles of the present application.

[0019] Figure 1 A perspective structural schematic view of the distal end of the cutting guide wire of the embodiment of the present application is shown;

[0020] Figure 2 A front view of the core wire body of the embodiment of the present application, in which one cutting groove is arranged at the same position in the axial direction;

[0021] Figure 3 A perspective structural schematic view of the core wire body of the embodiment of the present application, in which two cutting grooves are symmetrically arranged about the axial direction of the core wire body at the same position in the axial direction;

[0022] Figure 4 A front view of the core wire body of the embodiment of the present application, in which two cutting grooves are symmetrically arranged about the axial direction of the core wire body at the same position in the axial direction;

[0023] Figure 5 A Figure 2 A sectional view of the section A-A;

[0024] Figure 6 A sectional view of the section A-A;

[0025] Figure 7 Figure 6 shows a cross-sectional view of the core wire body of the first embodiment of the present application, in which a cutting groove is formed at the same position in the axial direction, and the cross section is a connecting section;

[0026] Figure 8 Figure 7 shows a cross-sectional view of the core wire body of the second embodiment of the present application, in which a cutting groove is formed at the same position in the axial direction, and the cross section is a connecting section;

[0027] Figure 9 Figure 8 shows a cross-sectional view of the core wire body of the first embodiment of the present application, in which two cutting grooves are formed at the same position in the axial direction, and the cross section is a connecting section;

[0028] Figure 10 Figure 9 shows a cross-sectional view of the core wire body of the third embodiment of the present application, in which a cutting groove is formed at the same position in the axial direction, and the cross section is a connecting section;

[0029] Figure 11 Figure 10 shows a cross-sectional view of the core wire body of the fourth embodiment of the present application, in which a cutting groove is formed at the same position in the axial direction, and the cross section is a connecting section;

[0030] Figure 12 Figure 11 shows a cross-sectional view of the core wire body of the fifth embodiment of the present application, in which a cutting groove is formed at the same position in the axial direction, and the cross section is a connecting section. DETAILED DESCRIPTION

[0031] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numbers in different drawings represent the same or similar elements. Although various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0032] It should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the convenience of description of the present application or simplification of the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In addition, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance or a quantity of the indicated technical features. Thus, a feature defined with "first", "second" may include one or more of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise expressly and specifically defined.

[0034] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0035] In addition, for the purpose of convenience and brevity, specific details of embodiments of the present application are set forth in the description below. It is to be understood, however, that the present application can be practiced without specific details or with other methods, components, etc. In some instances, well-known methods, structures and techniques have not been described in detail in order to avoid obscuring the present application.

[0036] Figure 1 A perspective view showing the distal end of the cutting guide wire of the embodiment of the present application; Figure 2 A front view showing the core wire body of the embodiment of the present application with one cutting slot opened at the same axial position of the core wire body; Figure 3 A perspective view showing the core wire body of the embodiment of the present application with two cutting slots opened at the same axial position of the core wire body and symmetrically relative to the axial direction of the core wire body; Figure 4 A front view showing the core wire body of the embodiment of the present application with two cutting slots opened at the same axial position of the core wire body and symmetrically relative to the axial direction of the core wire body; Figure 5 A cross-sectional view of the section A-A; Figure 2 A cross-sectional view of the section A-A; Figure 6 A cross-sectional view of the section A-A; Figure 7 A cross-sectional view of the section A-A; Figure 8 A cross-sectional view of the section A-A; Figure 9 A cross-sectional view of the section A-A; Figure 10 A cross-sectional view of the section A-A; Figure 11 A cross-sectional view of the section A-A; Figure 12The core wire body of the fifth embodiment of the present application is provided with a cutting groove at the same position in the axial direction, and the cross section of the cutting groove is a connecting section.

[0037] As shown in Figures 1-12 The cutting guide wire comprises a core wire body 10 in a cylindrical wire structure, the core wire body 10 is provided with cutting grooves 20 spaced apart in the axial direction, the cutting grooves 20 spaced apart in the axial direction of the core wire body 10 have a deflection in the circumferential direction of the core wire body 10, and the ratio of the maximum depth of the cutting groove 20 in the radial direction of the core wire body 10 to the diameter of the core wire body 10 is less than or equal to 7 / 8.

[0038] In this embodiment, by providing the cutting grooves 20 spaced apart in the axial direction of the core wire body 10, compared with the traditional grinding core wire plus spring winding assembly guide wire, the structure of the cutting guide wire of the present application is more simple, the manufacturing process is simple, the cutting grooves 20 provided on the surface make it have better flexibility, better passability, and it is easy for the operator to deliver the core wire body 10 to the distal end and facilitate the subsequent delivery of the corresponding device. Furthermore, the cutting grooves 20 spaced apart have a deflection in the circumferential direction of the core wire body 10, that is, two or more cutting grooves 20 are distributed in a spiral shape in the axial direction of the core wire body 10. When the operator applies a rotating torque at the proximal end, the proximal torque can be more effectively transmitted to the distal end of the guide wire, has better torque transmission performance, and can ensure more uniform torque transmission, so that the operator can flexibly manipulate the guide wire at the proximal end, quickly establish a vascular access, and shorten the operation time.

[0039] In summary, the cutting guide wire of the present application not only meets the requirements of better flexibility of the distal end of the guide wire and higher efficiency of torque transmission, but also only needs to be cut to complete the preparation of the core wire body 10. The integral forming process does not damage the structure itself, and further processing such as welding is not required on the core wire body 10, which greatly simplifies the guide wire processing process.

[0040] It should be noted here that the ratio of the maximum depth of the cutting groove 20 in the radial direction of the core wire body 10 to the diameter of the core wire body 10 is less than or equal to 7 / 8. This ensures that the connection between the grooves on the core wire body 10 has better flexibility while still having a certain structural strength, and is not prone to metal fatigue or even breakage at the thinner part.

[0041] Furthermore, the ratio of the minimum depth of the cutting groove 20 in the radial direction of the core wire body 10 to the diameter of the core wire body 10 is greater than or equal to 1 / 8, so as to ensure that the cutting groove 20 has a certain depth, which has practical processing significance. The angle between the center line of the two ends of a single cutting groove 20 to the core wire body 10 is usually greater than 90°, which also ensures that the cutting groove 20 has a certain width in the circumferential direction of the core wire body 10, ensuring that the cutting groove 20 has practical significance, and the angle is not specifically limited.

[0042] Preferably, the ratio of the minimum radial depth of the cutting groove 20 in the core wire body 10 to the diameter of the core wire body 10 is greater than or equal to 1 / 8 and less than or equal to 7 / 8.

[0043] like Figure 3 As shown, in one specific embodiment, a cutting groove 20 is formed at the same position in the axial direction of the core wire body 10. Therefore, the odd-numbered cutting grooves 20 in the direction from the far end to the near end of the core wire body 10 form an odd-numbered groove group 21, and the even-numbered cutting grooves 20 in the direction from the far end to the near end of the core wire body 10 form an even-numbered groove group 22. The deflection angle between adjacent cutting grooves 20 in the odd-numbered groove group 21 is a first preset angle α, and the first preset angle α is less than or equal to 180°. The deflection angle between adjacent cutting grooves 20 in the even-numbered groove group 22 is a second preset angle β, and the second preset angle β is less than or equal to 180°.

[0044] In one specific embodiment, the core wire body 10 has a cutting groove 20 at the same position in its axial direction. The deflection angle between the first cutting groove 20 in the direction from the distal end to the proximal end of the core wire body 10 and the second cutting groove 20 in the same direction can be 30°, 45°, 60°, 90° or 180°.

[0045] It should also be noted that, in this application, the proximal end refers to the end closest to the surgeon's operating point, and the distal end refers to the end adjacent to the target location within the lesion.

[0046] The odd-numbered groove group 21 described in this application is ordered sequentially from the distal end to the proximal end of the core wire body 10, such as the first cutting groove 20, the third cutting groove 20, the fifth cutting groove 20, and so on. The even-numbered groove group 22 described in this application is ordered sequentially from the distal end to the proximal end of the core wire body 10, such as the second cutting groove 20, the fourth cutting groove 20, the sixth cutting groove 20, and so on. The deflection angle described in this application refers to the gradual deflection of two or more cutting grooves 20 spaced apart along the axial direction of the core wire body 10 at a certain angle in the circumferential direction, with each adjacent cutting groove 20 deflecting at a specific angle.

[0047] The first preset angle α is the deflection angle of the first cutting groove 20 and the third cutting groove 20, the third cutting groove 20 and the fifth cutting groove 20, etc., in the circumferential direction of the core wire body 10 from the far end to the near end. The second preset angle β is the deflection angle of the second cutting groove 20 and the fourth cutting groove 20, the fourth cutting groove 20 and the sixth cutting groove 20, etc., in the circumferential direction of the core wire body 10 from the far end to the near end.

[0048] In one specific embodiment, the first preset angle α and the second preset angle β are equal, and the deflection angle between the first cutting groove 20 of the core wire body 10 in the direction from the far end to the near end and the second cutting groove 20 in the same direction is 180°.

[0049] Preferably, the first preset angle α is equal to 90°, the second preset angle β is equal to 90°, and the deflection angle between the first cutting groove 20 in the direction from the far end to the near end of the core wire body 10 and the second cutting groove 20 in the same direction is 30°, 45°, 60°, 90°, 120°, 135° or 180°.

[0050] Figure 3 The example shown is an embodiment where the first cutting groove 20 in the direction from the distal end to the proximal end of the core wire body 10 has a deflection angle of 180° with the second cutting groove 20 in the same direction.

[0051] Furthermore, the core wire body 10 has a solid section 11 at the distal end of the distal cutting groove 20, and the distal end of the solid section 11 has an arc-shaped end 12. The arc-shaped end 12 can prevent the distal end of the cutting guide wire from causing damage to the patient's body.

[0052] In one specific embodiment, two cutting grooves 20 are formed at the same position along the axial direction of the core wire body 10, and the two cutting grooves 20 are symmetrically arranged along the axial direction of the core wire body 10.

[0053] like Figure 4 As shown, in one specific embodiment, the odd-numbered cutting grooves 20 of the core wire body 10 from the far end to the near end form an odd-numbered groove group 21. The deflection angle between adjacent cutting grooves 20 in the odd-numbered groove group 21 is a third preset angle γ, which is between 6° and 45°. Therefore, the even-numbered cutting grooves 20 of the core wire body 10 from the far end to the near end form an even-numbered groove group 22. The deflection angle between adjacent cutting grooves 20 in the even-numbered groove group 22 is a fourth preset angle θ, which is between 6° and 45°.

[0054] At this point, it is particularly important to emphasize that for the first preset angle α, the second preset angle β, the third preset angle γ, and the fourth preset angle θ, angles divisible by 360° should be selected to facilitate processing. For example, the third preset angle γ can be 9°, 18°, etc. For the fourth preset angle θ, it can be the same as the third preset angle γ, or it can be different from the third preset angle γ. No further restrictions are imposed.

[0055] In one specific embodiment, the third preset angle γ is equal to the fourth preset angle θ.

[0056] In one embodiment, two cutting grooves 20 are formed at the same axial position of the core wire body 10, and the two cutting grooves 20 are symmetrically arranged along the axial direction of the core wire body 10. The deflection angle between the cutting groove 20 in the odd groove group 21 and the cutting groove 20 adjacent to it on the proximal side in the even groove group 22 is 30°, 45°, 60° or 90°.

[0057] Figure 1 As shown, the deflection angle between the cutting groove 20 in the odd groove group 21 and the cutting groove 20 adjacent to it on the proximal side in the even groove group 22 is 90°.

[0058] In one embodiment, more than three cutting grooves 20 are formed at the same axial position of the core wire body 10, and the cutting grooves 20 are uniformly distributed in the circumferential direction of the core wire body 10.

[0059] In one embodiment, the cutting grooves 20 adjacent to each other in the circumferential direction of the core wire body 10 are connected to each other.

[0060] In one embodiment, the maximum depth of the cutting groove 20 gradually decreases from the distal end to the proximal end of the core wire body 10.

[0061] In this embodiment, the maximum depth of the cutting groove 20 gradually decreases from the distal end to the proximal end of the core wire body 10, that is, the cutting depth gradually decreases from the distal end to the proximal end, so that the cutting guide wire has the characteristics of high distal softness and good proximal support.

[0062] In one embodiment, the cutting grooves 20 are gradually increased in the axial direction of the core wire body 10 from the distal end to the proximal end.

[0063] In this embodiment, the cutting grooves 20 are gradually increased in the axial direction of the core wire body 10 from the distal end to the proximal end, so that the cutting guide wire has the characteristics of being harder at the proximal end and softer at the distal end compared with the conventional delivery guide wire.

[0064] In summary, the softness of the head end of the guide wire body or component is mainly controlled by the groove width, groove depth and groove distance. The overall mechanical performance is mainly controlled by the groove distribution rule, the angle between the odd groove and the even groove, the angle control between the odd groove or the even groove, the specific groove width, the groove distance, and the deflection angle of the groove in the circumferential direction of the core wire body 10. More accurate values can be obtained by calculation according to different specific use conditions, so the more detailed parameters of the cutting groove 20 width, the cutting groove 20 distance and the deflection angle in this application are not limited in this paper.

[0065] As shown in Figure 2 , Figure 5 , Figure 5 , Figure 2The cross-sectional view of the section A-A, the core wire body 10 is cut off the cutting groove 20, the remaining part is the connecting section 13, by processing, only cutting tool cutting a knife can complete the processing of a cutting groove 20 on the core wire body 10.

[0066] Figures 5-12 The cross-sectional view of the section A-A, the core wire body 10 is cut off the cutting groove 20, the remaining part is the connecting section 13, by processing, only cutting tool cutting a knife can complete the processing of a cutting groove 20 on the core wire body 10. Figure 12 Need to rotate the core wire body 10 for cutting processing, the rest are rotating the corresponding tool for processing of the core wire body 10.

[0067] In one embodiment, the core wire body 10 is coated with a developing layer, or the core wire body 10 has a developing wire in the core.

[0068] In this embodiment, more specifically, the core wire body 10 has a core of DFT wire material inside, or the core wire body 10 is plated with a radiopaque, developing metal layer on the outer surface.

[0069] It should be noted here that the core wire body 10 is a DFT wire material, usually a drawn tube of external nickel titanium and internal platinum gold, or external cobalt chromium and internal platinum gold.

[0070] Preferably, the core wire body 10 of the present application is cut into an alloy core wire, and the alloy material can be nickel titanium alloy, cobalt chromium alloy and the like.

[0071] Further, the processing method of the cutting groove 20 on the core wire body 10 can be laser cutting, micro tool cutting, wire cutting, chemical corrosion, etc., and the specific processing method is not limited.

[0072] The above has described the embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical applications or improvements to the technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A cutting guide wire, characterized in that, The core filament body comprises a core filament body; The core filament body is in a cylindrical filament structure, and the core filament body is provided with cutting grooves at intervals along the axial direction thereof, The cutting grooves provided at intervals along the axial direction of the core filament body have a deflection in the circumferential direction of the core filament body, and two or more cutting grooves are distributed in a spiral shape in the axial direction of the core filament body. The ratio of the maximum depth of the cutting groove in the radial direction of the core filament body to the diameter of the core filament body is less than or equal to 7 / 8, and the ratio of the minimum depth of the cutting groove in the radial direction of the core filament body to the diameter of the core filament body is greater than or equal to 1 / 8. The core filament body has a solid section at the distal end of the distal end cutting groove, and the distal end of the solid section has an arc-shaped end.

2. The cutting guidewire of claim 1, wherein, The core filament body is provided with one cutting groove at the same position in the axial direction thereof, so that the cutting grooves at odd-numbered positions in the distal-to-proximal direction of the core filament body form an odd-numbered groove group, and the cutting grooves at even-numbered positions in the distal-to-proximal direction of the core filament body form an even-numbered groove group. The deflection angle between adjacent cutting grooves in the odd-numbered groove group is a first preset angle, and the first preset angle is less than or equal to 180°. The deflection angle between adjacent cutting grooves in the even-numbered groove group is a second preset angle, and the second preset angle is less than or equal to 180°.

3. The cutting guidewire of claim 2, wherein, The first preset angle is equal to the second preset angle. The deflection angle between the cutting groove at the first position in the distal-to-proximal direction of the core filament body and the cutting groove at the second position in the same direction is 30°, 45°, 60°, 90°, 120°, 135° or 180°.

4. The cutting guidewire of claim 1, wherein, Two cutting grooves are provided at the same position in the axial direction of the core filament body, and the two cutting grooves are symmetrically arranged along the axial direction of the core filament body.

5. The cutting guidewire of claim 4, wherein, The cutting grooves at odd-numbered positions in the distal-to-proximal direction of the core filament body form an odd-numbered groove group, the deflection angle between adjacent cutting grooves in the odd-numbered groove group is a third preset angle, and the third preset angle is between 6° and 45°. The cutting grooves at even-numbered positions in the distal-to-proximal direction of the core filament body form an even-numbered groove group, The deflection angle between adjacent cutting grooves in the even-numbered groove group is a fourth preset angle, and the fourth preset angle is between 6° and 45°.

6. The cutting guidewire of claim 5, wherein, The third preset angle is equal to the fourth preset angle.

7. The cutting guidewire of claim 5, wherein, The deflection angle between the cutting groove in the odd-numbered groove group and the cutting groove adjacent to it on the proximal side of the even-numbered groove group is 30°, 45°, 60° or 90°.

8. The cutting guidewire of claim 1, wherein, The core filament body is provided with three or more cutting grooves at the same position in the axial direction thereof, and the cutting grooves are uniformly distributed in the circumferential direction of the core filament body; adjacent cutting grooves in the circumferential direction of the core filament body are connected to each other.

9. The cutting guidewire of any of claims 1-8, wherein, The maximum depth of the cutting groove gradually decreases in the distal-to-proximal direction of the core filament body.

10. The cutting guidewire of any of claims 1-8, wherein, The interval of the cutting groove in the axial direction of the core filament body gradually increases in the distal-to-proximal direction.

11. The cutting guidewire of any of claims 1-8, wherein, The outer periphery of the core filament body is covered with a developing layer, or the inner core of the core filament body has a developing filament.

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