guide wire

Abstract

The present application relates to a kind of guide wire, including guide wire main body;Boss component, cover in the outer of the distal end side of the guide wire main body;First pull component, the distal end side of the guide wire main body and the boss component are connected, and first tension can be applied to the boss component towards distal direction;Second pull component, the proximal end side of the guide wire main body and the boss component are connected, the second pull component is configured to can be under the action of external force towards the boss component second tension is applied to the proximal direction;Wherein, when the boss component only bears the first tension, the boss component is in radial contraction state, when the boss component bears the first tension and the second tension, the boss component is in radial expansion state, and the boss component in the expansion state is greater than the boss component in the contraction state The outer diameter size of size.Due to the guide wire according to the present application, it has multiple functions, and can meet the multiple use requirements.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a guidewire. Background Technology

[0002] Interventional therapy has become a growing trend in the treatment of cardiovascular diseases. With the continuous development of interventional techniques, guidewires, as pioneers in interventional procedures, occupy an indispensable and increasingly important position. Embolism protection devices are protective devices that collect plaques that may detach during interventional procedures, preventing them from forming larger embolisms.

[0003] Existing embolization protection devices are equipped with guidewires that have a stepped structure at the distal end. This stepped structure is used for the release and retrieval of the protective umbrella of the embolization protection device. However, the stepped structure of the existing guidewires is an integral part of the guidewire itself, which can only be used for the release and retrieval of the protective umbrella. This single function has a limited scope of application and is not suitable for use as a general peripheral guidewire for guiding sheaths or in conjunction with other instruments. This greatly limits the application of the guidewire during the operation. Different guidewires need to be exchanged when establishing vascular access, which leads to more frequent guidewire changes during the operation, increasing the cost and time of the operation. Summary of the Invention

[0004] The purpose of this invention is to at least solve the problems of limited functionality and narrow applicability of existing integrated stepped guidewire structures. To address the shortcomings of the prior art, this invention provides a new guidewire.

[0005] The technical problem solved by this invention is achieved through the following technical solution:

[0006] According to an embodiment of the present invention, a guidewire is provided, the guidewire comprising: a guidewire body; a boss assembly sleeved on the guidewire body; a first traction assembly connected to the distal end of the guidewire body and the boss assembly respectively, the first traction assembly applying a first pulling force toward the boss assembly in a distal direction; and a second traction assembly connected to the proximal end of the guidewire body and the boss assembly respectively, the second traction assembly being configured to apply a second pulling force toward the proximal end to the boss assembly under the action of an external force; wherein, the boss assembly is in a radially contracted state when only subjected to the first pulling force, and in a radially extended state when subjected to both the first and second pulling forces, the outer diameter of the boss assembly in the extended state being larger than the outer diameter of the boss assembly in the contracted state.

[0007] In some embodiments of the present invention, the boss assembly includes a fixing component and a plurality of blocking components. The fixing component is sleeved on the outside of the guide wire body. The plurality of blocking components are arranged sequentially around the fixing component in the circumferential direction, and each blocking component is connected to the fixing component. The first traction assembly and the second traction assembly are respectively connected to the blocking components.

[0008] In some embodiments of the present invention, the fixing component includes a fixing seat and a plurality of hinge plates. The fixing seat is sleeved on the outside of the guide wire body. The plurality of hinge plates are arranged sequentially around the circumference of the fixing seat and connected to the outer circumferential surface of the fixing seat. Each of the blocking members is hinged to a hinge plate through a hinge shaft. The axis of the hinge shaft is perpendicular to or at an angle to the axis of the guide wire body.

[0009] In some embodiments of the present invention, the first traction assembly includes a plurality of first elastic elements, each of the first elastic elements having its distal end connected to the distal end of the guidewire body and its proximal end connected to one of the blocking elements.

[0010] In some embodiments of the present invention, the second traction assembly includes: an operating component movably connected to the proximal end of the guidewire body and movable relative to the guidewire body along the axial direction of the guidewire body; and a plurality of traction wires, each of the traction wires having its distal end connected to one of the blocking members, the proximal end of the traction wire being connected to the operating component.

[0011] In some embodiments of the present invention, the guidewire body is provided with a cavity extending along the axial direction of the guidewire body and a plurality of through holes communicating with the cavity. The proximal end of the cavity forms a first opening, and the distal end of the through hole forms a second opening on the outer peripheral surface of the guidewire body. The operating component is movably inserted into the cavity through the first opening. Each pulling wire is inserted into one of the through holes, and the proximal end of the pulling wire is located in the cavity and connected to the operating component. The distal end of the pulling wire extends out of the guidewire body through the second opening.

[0012] In some embodiments of the present invention, the operating component includes an operating member and a pulling rod. The operating member is rotatably connected to the proximal end of the guide wire body. The distal end of the operating member is provided with a first threaded hole. The first threaded hole extends along the axial direction of the guide wire body and communicates with the cavity. The outer peripheral surface of the pulling rod is provided with a first external thread that is threadedly engaged with the first threaded hole. The pulling rod is movably inserted into the cavity and threadedly connected to the first threaded hole. The proximal end of the pulling wire is connected to the pulling rod.

[0013] In some embodiments of the present invention, the operating component includes an operating member and a pulling rod. The outer peripheral surface of the operating member is provided with a second external thread, and the inner wall of the cavity is provided with a second internal thread that mates with the second external thread. The operating member is inserted into the cavity and threadedly connected to the guide wire body. The pulling rod is movably inserted into the cavity, and the proximal end of the pulling rod is movably connected to the operating member. The proximal end of the pulling wire is connected to the pulling rod.

[0014] In some embodiments of the present invention, the operating component includes an operating member, a traction rod, and a locking member. The operating member is movably inserted into the cavity, and the operating member is provided with a locking part. The locking member is detachably installed on the guidewire body and cooperates with the locking part to switch between a locked state and an unlocked state between the operating member and the guidewire body. In the locked state, the operating member is relatively fixed to the guidewire body. In the unlocked state, the operating member can move relative to the guidewire body along the axial direction of the guidewire body. The traction rod is movably inserted into the cavity and connected to the operating member, and the proximal end of the traction wire is connected to the traction rod.

[0015] In some embodiments of the present invention, the guidewire body is provided with a limiting groove extending along the axial direction of the guidewire body, the limiting groove communicating with the cavity, and at least a portion of the locking part is inserted into the limiting groove along the radial direction of the guidewire body. In the locked state, the locking member is inserted into the limiting groove and connected to the locking part. In the unlocked state, the locking member disengages from the limiting groove and separates from the locking part.

[0016] In some embodiments of the present invention, the second traction assembly further includes a limiting member, which is disposed in the cavity and connected to the inner wall of the cavity. The traction rod is provided with a sliding portion that penetrates the inner and outer surfaces of the traction rod, and the limiting member passes through the sliding portion.

[0017] According to the guidewire proposed in this invention, by operating the second traction assembly, the step assembly can switch between a radially contracted state and a radially extended state using the cooperation of the first and second tension forces. By controlling the step assembly in the radially contracted state, the guidewire can be used as a regular guidewire to guide sheaths and various interventional devices to the patient's target location. When there is a need for umbrella release and retrieval, the step assembly can be moved to the radially extended state by operating the second traction assembly. The guidewire has multiple functions to meet diverse usage needs. During procedures such as establishing vascular access, guiding interventional devices, and releasing and retrieving the umbrella, there is no need to change the guidewire, reducing the complexity of the surgery and shortening the operation time and cost. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0019] Figure 1 This is a schematic diagram of the guidewire structure in Embodiment 1.1 of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the guidewire in Embodiment 1.1 of the present invention;

[0021] Figure 3 It shows Figure 2 A magnified view of part A in the middle;

[0022] Figure 4 A cross-sectional structural diagram of the locating pin and locating groove is shown;

[0023] Figure 5A This is a schematic diagram of the guide wire and protective umbrella in Embodiment 1 of the present invention;

[0024] Figure 5B This is a schematic diagram of the guide wire boss assembly in its retracted state according to Embodiment 1 of the present invention;

[0025] Figure 6 This is a schematic cross-sectional view of the guidewire in Embodiment 1.2 of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the fixing base in Embodiment 1 of the present invention;

[0027] Figure 8 This is a schematic diagram of the tie rod structure in Embodiment 1 of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the blocking member, hinge plate, and hinge shaft in Embodiment 1 of the present invention;

[0029] Figure 10 This is a schematic diagram of another guidewire structure in Embodiment 1 of the present invention;

[0030] Figure 11 This is a schematic diagram of the structure of Embodiment 1.3 of the present invention when the locking part is in the third part and the operating member and the guide wire body are in the locked state;

[0031] Figure 12 This is a schematic diagram of the structure of Embodiment 1.3 of the present invention when the locking part is in the second part and the operating member and the guide wire body are in the unlocked state;

[0032] Figure 13This is a schematic cross-sectional view of the guidewire in Embodiment 1.4 of the present invention;

[0033] Figure 14 This is a schematic diagram of the structure of Embodiment 1.4 of the present invention when the locking part is in the third part and the operating member and the guide wire body are in the locked state;

[0034] Figure 15 This is a schematic diagram of the structure of Embodiment 1.4 of the present invention when the locking part is in the second part and the operating member and the guide wire body are in the unlocked state;

[0035] Figure 16 This is a partial structural diagram of the guide wire in a radially contracted state, according to another embodiment of the present invention.

[0036] Figure 17 This is a partial structural diagram of the guide wire in a radially extended state, according to another embodiment of the present invention.

[0037] Figure 18 This is a partial structural schematic diagram of the guide wire in a radially contracted state, according to another embodiment of the present invention.

[0038] Figure 19 This is a partial structural diagram of the guide wire in a radially extended state, according to another embodiment of the present invention;

[0039] Figure 20 This is a partial structural diagram of the guide wire in the radially contracted state of the boss assembly in Embodiment 2 of the present invention;

[0040] Figure 21 This is a partial structural diagram of the guide wire in the radially extended state of the boss assembly of Embodiment 2 of the present invention.

[0041] The labels in the attached diagram are as follows:

[0042] 100. Guide wire;

[0043] 10. Guide wire body; 11. Main body; 12. Loading part; 13. Guide head; 101. Cavity; 102. Through hole; 1011. Second internal thread; 103. Limiting groove; 1031. First part; 1032. Second part; 1033. Third part; 104. Positioning groove; 1041. Limiting protrusion; 105. Second marking;

[0044] 20. Boss assembly; 21. Fixing component; 211. Fixing base; 2111. Connecting part; 21111. Connecting surface; 212. Hinge plate; 213. Hinge shaft; 22. Blocking component; 23. Connecting rod; 24. Sliding tube; 25. Sealing component;

[0045] 30. First tensioning component; 31. First elastic element;

[0046] 40. Second traction assembly; 41. Operating component; 411. Operating element; 4111. First threaded hole; 4112. Second external thread; 4113. Operating body; 4114. Connecting rod; 4115. Locking part; 4116. Limiting cavity; 4117. Through hole; 4118. Positioning pin; 41181. Head; 41182. Notch; 4119. First marking;

[0047] 412. Pull rod; 4121. First external thread; 4122. Sliding part; 4123. Rotating part; 4124. Pulling body; 413. Locking element; 414. Limiting element;

[0048] 42. Wire drawing;

[0049] 50. Control button;

[0050] 200. Protective Umbrella. Detailed Implementation

[0051] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0052] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0053] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0054] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure rotates, then an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0055] It should be noted that the terms "distal" and "proximal" are used as directional terms, which are commonly used in the field of interventional medical devices. "Distal" refers to the end furthest from the operator during the procedure, while "proximal" refers to the end closest to the operator. Axial direction refers to the direction parallel to the line connecting the center of the distal and proximal ends of the medical device; radial direction refers to the direction perpendicular to the aforementioned axial direction.

[0056] like Figure 1 , Figure 2 and Figure 5A As shown, the present invention proposes a guide wire 100, which includes a guide wire body 10, a boss assembly 20, a first traction assembly 30, and a second traction assembly 40.

[0057] Specifically, the guidewire body 10 includes a main body 11, a loading part 12, and a guide head 13 connected sequentially from the proximal end to the distal end. Both the main body 11 and the loading part 12 are cylindrical rod-shaped structures, and the diameter of the main body 11 is larger than the diameter of the carrier part. The guide head 13 is located at the distal end of the loading part 12. The guide head 13 is hemispherical. When the hemispherical guide head 13 contacts the blood vessel wall, its rounded surface can avoid sharp edges and corners from causing mechanical damage such as scratching and cutting to the blood vessel intima. The hemispherical guide head 13 has better passability and can move smoothly along the tortuous path of the blood vessel, which is conducive to conforming to the tortuous shape of the blood vessel and accurately controlling the direction of the guidewire 100.

[0058] The boss assembly 20 is sleeved on the outside of the guide wire body 10. The boss assembly 20 is located near the distal end of the guide wire body 10, specifically sleeved on the outside of the loading part 12. The first pulling assembly 30 is located closer to the distal end than the boss assembly 20. The first pulling assembly 30 is connected to the distal end (i.e., the guide head 13) of the guide wire body 10 and the boss assembly 20 respectively. The first pulling assembly 30 is used to apply a first pulling force toward the distal end to the boss assembly 20, so that the boss assembly 20 has a tendency to move toward the distal end. The second pulling assembly 40 is connected to the proximal end of the guide wire body 10 and the boss assembly 20 respectively. The second pulling assembly 40 is used to apply a second pulling force toward the proximal end to the boss assembly 20, so that the boss assembly 20 has a tendency to move toward the proximal end. It should be noted that the second traction assembly 40 differs from the first traction assembly 30 in that the first traction assembly 30 always applies a first pulling force toward the distal end to the boss assembly 20, while the second traction assembly 40 only applies a second pulling force toward the proximal end to the boss assembly 20 under the action of an external force. The external force refers to the operator applying a driving force to move or rotate the second traction assembly 40, thereby causing the second traction assembly 40 to generate a second pulling force toward the proximal end and transmit it to the boss assembly 20.

[0059] Specifically, when the boss assembly 20 only bears the first tensile force, that is, before the operator operates the second pulling assembly 40, the boss assembly 20 is in a radially contracted state under the action of the first tensile force, such as... Figure 5B As shown; when the boss assembly 20 is subjected to the first tension and the second tension at the same time, that is, after the operator operates the second traction assembly 40, the boss assembly 20 is in a radially extended state, and the outer diameter of the boss assembly 20 in the extended state is greater than the outer diameter of the boss assembly 20 in the contracted state.

[0060] Understandably, by operating the second traction component 40, the step assembly can switch between a radially contracted state and a radially extended state using the coordination of the first and second pulling forces. By controlling the step assembly in the radially contracted state, the guidewire 100 can be used as a regular guidewire 100 to guide the sheath and various interventional instruments to the patient's target location. When the release and retrieval of the protective umbrella 200 is required, the step assembly can be moved to the radially extended state by operating the second traction component 40. The guidewire 100 has multiple functions to meet diverse usage needs. During procedures such as establishing vascular access, guiding interventional instruments, and releasing and retrieving the protective umbrella 200, there is no need to replace the guidewire 100, reducing the complexity of the surgery and shortening the operation time and cost.

[0061] In this embodiment, radial direction refers to the radial direction of the guide wire body 10, that is, the direction perpendicular to the axial direction of the guide wire body 10.

[0062] It should also be noted that, please refer to Figure 2 , Figure 16 , Figure 18 and Figure 20 As shown, based on different structural forms of the boss assembly 20, the way the boss assembly 20 transitions between the radially contracted state and the radially extended state is also different.

[0063] For example, such as Figure 16 , Figure 17 , Figure 18 and Figure 19 As shown, the boss assembly 20 achieves radial contraction or expansion based on elastic deformation. The tendency of the boss assembly 20 to move towards the distal end means that during the elastic deformation process, a portion of the boss assembly 20 moves towards the distal end, causing the axial dimension of the boss assembly 20 in the guidewire body 10 to gradually increase, and the radial dimension of the boss assembly 20 to gradually decrease, until the radial dimension of the boss assembly 20 is smaller than the diameter of the body 11. Conversely, the tendency of the boss assembly 20 to move towards the proximal end means that the boss... During the elastic deformation process, part of the structure of the boss assembly 20 moves towards the proximal end, so that the axial dimension of the boss assembly 20 in the guide wire body 10 gradually decreases and the radial dimension of the boss assembly 20 gradually increases, so that the radial dimension of the boss assembly 20 is greater than the diameter of the body part 11, and the boss assembly 20 protrudes radially from the outer peripheral surface of the body part 11, thereby forming a protruding structure on the guide wire body 10, so that the boss assembly 20 can cooperate with the protective umbrella 200 to realize the release or retrieval of the protective umbrella 200.

[0064] The elastic deformation can also take many forms.

[0065] In some exemplary embodiments, the elastic deformation of the boss assembly 20 utilizes the principle that the shape memory alloy device undergoes elastic deformation and accumulates elastic potential energy under stress, and releases the elastic potential energy and elastically recovers when the stress changes or decreases, thus achieving the transition between a radially contracted state and a radially extended state. Specifically, please refer to... Figure 13 and Figure 14 As shown, the boss assembly 20 includes a sealing member 25 with a ball-and-socket structure made of nickel-titanium wire. The sealing member 25 is sleeved on the outside of the loading part 12. The first traction assembly 30 includes multiple first elastic members 31, specifically tension springs. The distal end of the first elastic member 31 is connected to the guide head 13, and the proximal end of the first elastic member 31 is connected to the distal end of the sealing member 25. The distal end of the second traction assembly 40 is connected to the distal end of the sealing member 25. The positions where the first elastic members 31 and the sealing member 25 are connected are the same as the positions where the second traction assembly 40 and the sealing member 25 are connected. The sealing member 25 is a shape memory metal device. When no external force is applied, the radial dimension of the sealing member 25 is larger than the diameter of the main body 11. Figure 13 As shown, when the sealing member 25 only bears the first pulling force applied by the first pulling assembly 30, the distal end of the sealing member 25 moves towards the distal side under the pulling action of the first pulling force, causing the sealing member 25 to contract radially and expand axially, making the radial dimension of the sealing member 25 smaller than the diameter of the main body 11. At this time, the boss assembly 20 is in a radially contracted state. When the operator operates the second pulling assembly 40, such as... Figure 17 As shown, the second traction assembly 40 applies a second pulling force to the sealing member 25 in the proximal direction. The second pulling force is opposite to the first pulling force, so that the second pulling force gradually counteracts the effect of the first pulling force on the sealing member 25. The sealing member 25 gradually recovers its elasticity, so that the sealing member 25 as a whole stretches in the radial direction and contracts in the axial direction, so that the radial dimension of the sealing member 25 is larger than the diameter of the main body 11. At this time, the boss assembly 20 is in a radially stretched state.

[0066] In other exemplary embodiments, the elastic deformation of the boss assembly 20 is achieved by utilizing the bending force of the flexible component to transition between a radially contracted state and a radially extended state. Specifically, please refer to... Figure 18 and Figure 19 As shown, the boss assembly 20 includes a fixing component 21 and multiple blocking components 22. The fixing component 21 has a ring structure and is sleeved and fixed outside the loading part 12. The multiple blocking components 22 are arranged sequentially around the circumference of the fixing component 21 and are connected to the outer circumferential surface of the fixing component 21. The blocking components 22 and the fixing component 21 can be connected as one piece by welding, fusion connection or other methods. The blocking components 22 and the fixing component 21 can also be integrally formed parts.

[0067] Furthermore, the first traction assembly 30 includes a plurality of first elastic elements 31, specifically tension springs, with the distal end of each first elastic element 31 connected to the guide head 13, and the proximal end of each first elastic element 31 connected to the distal end of a blocking element 22. The second traction assembly 40 includes a plurality of traction wires 42, with the distal end of each traction wire 42 connected to the proximal end of a blocking element 22. Figure 18 As shown, when the blocking member 22 only bears the first pulling force applied by the first pulling assembly 30, the blocking member 22 bends towards the distal end under the pulling action of the first pulling force, causing the entire group of blocking members 22 to shrink in the radial direction, thereby making the overall radial dimension of the group of blocking members 22 smaller than the diameter of the main body 11. At this time, the boss assembly 20 is in a radially shrunken state. When the operator operates the second pulling assembly 40, such as... Figure 19 As shown, the second pulling assembly 40 applies a second pulling force to the blocking member 22 in the proximal direction. The second pulling force is opposite in direction to the first pulling force, causing the second pulling force to gradually counteract the effect of the first pulling force on the sealing member 25. The blocking member 22 elastically recovers, causing the collective blocking members 22 to extend radially, making the overall radial dimension of the collective blocking members 22 larger than the diameter of the main body 11. At this time, the boss assembly 20 is in a radially extended state. In this embodiment, the blocking member 22 can be a rod-shaped member or a plate-shaped member.

[0068] In some embodiments, the transition between the radially contracted state and the radially extended state of the boss assembly 20 is achieved by rotating a portion of the device relative to the guide wire body 10. The following will further describe in detail the technical solutions of the specific structures of the first traction assembly 30, the second traction assembly 40, and the boss assembly 20 in the scheme of rotating a portion of the device relative to the guide wire body 10 with reference to specific embodiments.

[0069] Example 1

[0070] Combination Figure 2 , Figure 7 and Figure 9 As shown, in this embodiment, the boss assembly 20 includes a fixing seat 211, multiple hinge plates 212, and multiple blocking members 22. The fixing seat 211 is sleeved on the loading part 12 of the guide wire body 10. The fixing seat 211 has multiple connecting parts 2111 arranged sequentially and spaced apart along the circumference of the guide wire body 10. The connecting parts 2111 are provided with connecting surfaces 21111 for connecting with the hinge plates 212. The connecting surfaces 21111 are set as planes. The hinge plates 212 and the connecting surfaces 21111 are connected by welding. The hinge plates 212 and the blocking members 22 together form a hinge structure. Each blocking member 22 is hinged to a hinge plate 212 through a hinge shaft 213, and the axis of the hinge shaft 213 is arranged perpendicular to the axis of the guide wire body 10.

[0071] The first traction assembly 30 includes a plurality of first elastic elements 31. The distal end of each first elastic element 31 is connected to the guide head 13 of the guide wire body 10, and the proximal end of each first elastic element 31 is connected to a blocking element 22. The first elastic element 31 applies a pulling force toward the distal end to the blocking element 22 connected to it. When the blocking element 22 only bears the first pulling force, under the action of the elastic force of the first elastic element 31, the free end of the blocking element 22 (that is, the end of the blocking element 22 away from the fixed seat 211) deflects toward the distal end, and the boss assembly 20 is in a radially contracted state. In the radially contracted state, the extension direction of the blocking element 22 is parallel to the hinge plate 212 or the blocking element 22 and the hinge plate 212 form a small angle (e.g., 0 degrees to 10 degrees), so that the overall radial dimension of all the blocking elements 22 is smaller than the diameter of the main body 11 of the guide wire body 10.

[0072] The second traction assembly 40 includes an operating component 41 and a plurality of traction wires 42. The operating component 41 is movably connected to the proximal end of the guide wire body 10. The distal end of each traction wire 42 is connected to a blocking member 22. The proximal end of the traction wire 42 is connected to the operating component 41. By operating the operating component 41, the operator can move the operating component 41 relative to the guide wire body 10 in the axial direction of the guide wire body 10, thereby applying a second pulling force toward the proximal end to each blocking member using the operating component 41 and the plurality of traction wires 42 respectively. Under the action of the second pulling force, the free end of the blocking member 22 (that is, the end of the blocking member 22 away from the fixed seat 211) deflects toward the proximal end, and the boss assembly 20 is in a radially extended state. In the radially extended state, the extension direction of the blocking member 22 is perpendicular to the hinge plate 212 or the blocking member 22 and the hinge plate 212 form a large angle (e.g., 80 degrees to 90 degrees), so that the overall radial dimension of all the blocking members 22 is larger than the diameter of the main body 11 of the guide wire body 10.

[0073] In this embodiment, the operating component 41 is movable relative to the guide wire body 10 along the axial direction of the guide wire body 10 between a first position and a second position. Specifically, in the first position, the pulling wire 42 does not apply a second tension towards the proximal end to the blocking member 22. At this time, the blocking member 22 only bears the first tension towards the distal end applied by the first pulling assembly 30, and the boss assembly 20 is in a radially contracted state. In the second position, the operating component 41 applies a second tension towards the proximal end to the blocking member 22 through the pulling wire 42. The blocking member 22 simultaneously bears the first tension and the second tension, and the boss assembly 20 is in a radially extended state.

[0074] In this embodiment, as Figure 9As shown, both the blocking member 22 and the hinge plate 212 are plate-shaped structures. When the boss assembly 20 is in a radially extended state, all the blocking members 22 unfold in a petal shape, forming a stepped structure for blocking and positioning the protective umbrella 200.

[0075] In this embodiment, as Figure 2 , Figure 7 and Figure 9 As shown, the boss assembly 20 includes 8 hinge plates 212 and 8 blocking members 22. All the blocking members 22 are arranged in a centrally symmetrical manner around the central axis of the guide wire body 10, and all the hinge plates 212 are arranged in a centrally symmetrical manner around the central axis of the guide wire body 10.

[0076] In this embodiment, as Figure 2 As shown, the guidewire body 10 has a cavity 101 extending axially along the guidewire body 10 and multiple through holes 102 communicating with the cavity 101. The proximal end of the cavity 101 forms a first opening, and the distal end of the through hole 102 forms a second opening on the outer peripheral surface of the guidewire body 10. The operating component 41 is movably inserted into the cavity 101 through the first opening. Each pull wire 42 is inserted into one through hole 102, with the proximal end of the pull wire 42 located within the cavity 101 and connected to the operating component 41, and the distal end of the pull wire 42 extending out of the guidewire body 10 through the second opening. This arrangement ensures that both the operating component 41 and the pull wire 42 are located inside the guidewire body 10, resulting in a simple and flat outer contour of the guidewire 100. This also prevents the operating component 41 and the pull wire 42 from interfering with blood vessels or other interventional devices during use.

[0077] It should be noted that the blocking member 22 in this embodiment can be hinged to the distal end of the hinge plate 212 (see reference). Figure 10 Alternatively, the blocking member 22 can be hinged to the proximal end of the hinge plate 212 (see reference). Figure 2 ).

[0078] Various embodiments can be configured for the movable connection between the operating component 41 and the guide wire body 10:

[0079] Example 1.1

[0080] In this embodiment, please refer to Figure 2 , Figure 3 and Figure 4As shown, the operating component 41 includes an operating element 411 and a pulling rod 412. The proximal end of the guide wire body 10 is provided with an annular positioning groove 104, which surrounds the first opening and is located outside the first opening. The operating element 411 includes an operating body 4113 and a connecting rod 4114 connected to the distal end of the operating body 4113. The connecting rod 4114 is rotatably inserted into the cavity 101. Both the operating body 4113 and the connecting rod 4114 have a round rod structure, and the diameter of the operating body 4113 is larger than the diameter of the connecting rod 4114. A positioning pin 4118 is provided on the proximal end face of the operating body 4113. A limiting protrusion 1041 is provided on the inner wall of the positioning groove 104. The positioning pin 4118... The head 41181 of the positioning pin 4118 is inserted into the positioning groove 104 and clamped between the limiting protrusion 1041 and the bottom wall of the positioning groove 104. Through the cooperation of the positioning pin 4118 and the positioning groove 104, the positioning pin 4118 can rotate relative to the guide wire body 10 in the circumferential direction of the guide wire body 10 within the positioning groove 104, and restricts the positioning pin 4118 from moving axially relative to the guide wire body 10. This allows the operating member 411 to rotate relative to the guide wire body 10 around the central axis of the guide wire body 10, and restricts the operating member 411 from moving axially relative to the guide wire body 10, thereby preventing the operating member 411 from coming off the guide wire body 10.

[0081] In this embodiment, as Figure 4 As shown, the positioning pin 4118 is a tubular part, and the tube wall of the positioning pin 4118 is provided with a notch 41182. The notch 41182 is arranged adjacent to the head 41181 of the positioning pin 4118 and is located on the proximal side of the head 41181, so that the head 41181 can deform radially inward when squeezed by the limiting protrusion 1041, thereby allowing the head 41181 to pass smoothly through the limiting protrusion 1041.

[0082] Furthermore, such as Figure 2As shown, the distal end of the operating member 411 is provided with a first threaded hole 4111. The first threaded hole 4111 extends along the axial direction of the guide wire body 10 and communicates with the cavity 101. The outer peripheral surface of the pulling rod 412 is provided with a first external thread 4121 that is threadedly engaged with the first threaded hole 4111. The pulling rod 412 is movably inserted into the cavity 101 and threadedly connected to the first threaded hole 4111. In this embodiment, the guide wire body 10, the operating member 411, and the pull rod 412 together constitute a nut screw mechanism. When the operator holds the guide wire body 10 and drives the operating member 411 to rotate relative to the guide wire body 10, the operating member 411 also rotates relative to the pull rod 412. By utilizing the cooperation between the first threaded hole 4111 and the first external thread 4121, the operating member 411 can drive the pull rod 412 to move axially relative to the guide wire body 10. The proximal end of the pull wire 42 is connected to the pull rod 412. The pull rod 412 pulls the pull wire 42 to move axially, thereby applying a second pulling force toward the proximal end to the blocking member 22 through the pull wire 42.

[0083] In this embodiment, the traction rod 412 is movable relative to the guide wire body 10 along the axial direction of the guide wire body 10 between a first position and a second position. In the first position, the traction wire 42 does not apply a proximal second tension to the blocking member 22. At this time, the blocking member 22 only bears the distal first tension applied by the first traction assembly 30, and the boss assembly 20 is in a radially contracted state. In the second position, the traction wire 42 applies a proximal second tension to the blocking member 22, and the blocking member 22 simultaneously bears both the first and second tensions, and the boss assembly 20 is in a radially extended state.

[0084] Understandably, when the pull rod 412 is in the region between the first position and the second position, the second tension is greater than zero, and the second tension gradually increases as the pull rod 412 moves from the first position to the second position.

[0085] It should be noted that if the pulling rod 412 can move axially during the rotation of the operating member 411, it is necessary to prevent the pulling rod 412 from rotating with the operating member 411. In this embodiment, since the pulling wire 42 is inserted into the through hole 102, the through hole 102 can restrict the pulling wire 42 from rotating relative to the guide wire body 10 around the central axis of the guide wire body 10. Thus, the pulling rod 412 can be restricted from rotating relative to the guide wire body 10 by the pulling wire 42. Therefore, when the operating member 411 is driven to rotate relative to the guide wire body 10, the pulling rod 412 can be restricted from rotating with the operating member 411.

[0086] Furthermore, please combine Figure 2 and Figure 8As shown, since the diameter of the pulling wire 42 is small, if the torsional force exerted by the operating member 411 on the pulling rod 412 is large, there is a possibility that the pulling rod 412 will rotate and cause multiple pulling wires 42 to become entangled. Therefore, in this embodiment, the second pulling assembly 40 also includes a limiting member 414. The limiting member 414 is disposed in the cavity 101 and connected to the inner wall of the cavity 101. The pulling rod 412 is provided with a sliding part 4122 that is arranged in the axial direction and penetrates the inner and outer surfaces of the pulling rod 412. The limiting member 414 is slidably connected to the sliding part 4122. The cooperation between the sliding part 4122 and the limiting member 414 allows the pulling rod 412 to move axially relative to the guide wire body 10 and restricts the rotation of the pulling rod 412 relative to the guide wire body 10 around the central axis of the guide wire body 10.

[0087] Specifically, in some embodiments, the limiting member 414 is a rod-shaped structure inserted into the cavity 101. The sliding part 4122 is configured as a through-slot structure penetrating the inner and outer surfaces of the pulling rod 412. The through-slot structure is a long strip structure, and its length extends along the axial direction. The width of the sliding part 4122 matches the size of the limiting member 414. The limiting member 414 passes through the sliding part 4122 and is fixed in the cavity 101. When the pulling rod 412 moves axially, since the sliding part 4122 has a certain length, it can move axially relative to the limiting member 414. Furthermore, since the limiting member 414 passes through the sliding part 4122, if the pulling rod 412 has a tendency to rotate, the rotation tendency of the pulling rod 412 will be limited by the limiting member 414. This allows the pull rod 412 to move axially relative to the guide wire body 10, and restricts the pull rod 412 from rotating about the central axis of the guide wire body 10 relative to the guide wire body 10.

[0088] In this embodiment, as Figure 2 As shown, the diameter of the operating body 4113 of the operating member 411 is equal to the diameter of the main body 11 of the guidewire body 10, so as to make the overall outer peripheral contour of the guidewire 100 smoother.

[0089] like Figure 5A As shown, to facilitate the rotation operation of the operating component 411, the guide wire 100 also includes a control button 50 that is detachably connected to the operating body 4113 of the operating component 411. The control button 50 is sleeved on the outside of the operating component 411 and connected to the operating component 411. The outer peripheral surface of the control button 50 is provided with a plurality of grooves that are distributed sequentially and spaced along the circumference of the control button 50, so as to increase the roughness of the outer peripheral surface of the control button 50, improve the friction when holding and rotating the control button 50, and prevent slippage.

[0090] Among them, such as Figure 1As shown, a first mark 4119 is provided on the outer peripheral surface of the operating body 4113 of the operating member 411, and a second mark 105 is provided on the outer peripheral surface of the main body 11 of the guide wire body 10. By the relative position of the first mark 4119 and the second mark 105, the relative rotation state of the operating member 411 and the guide wire body 10 can be determined, so that the operator can determine whether the operating member 411 has completed a full rotation relative to the guide wire body 10, so as to allow the operator to judge the current state of the boss assembly 20.

[0091] Example 1.2

[0092] The differences between Example 1.2 and Example 1.1 will be described below. The similarities or similarities between Example 1.2 and Example 1.1 will not be repeated here.

[0093] like Figure 6 As shown, the operating component 41 includes an operating element 411 and a pulling rod 412. The operating element 411 includes an operating body 4113 and a connecting rod 4114 connected to the distal end of the operating body 4113. The connecting rod 4114 is rotatably inserted into the cavity 101. Both the operating body 4113 and the connecting rod 4114 are cylindrical, and the diameter of the operating body 4113 is larger than the diameter of the connecting rod 4114. The outer circumferential surface of the connecting rod 4114 is provided with a second external thread 4112. The inner wall of the cavity 101 is provided with a second internal thread 1011 that mates with the second external thread 4112. The connecting rod 4114 is threadedly connected to the guide wire body 10. By driving the operating body 4113 to rotate relative to the guide wire body 10, and based on the mating of the second external thread 4112 and the second internal thread 1011, the operating element 411 also moves relative to the guide wire body 10 along the axial direction of the guide wire body 10.

[0094] Furthermore, the proximal end of the pull rod 412 is rotatably connected to the operating member 411, so that the operating member 411 can drive the pull rod 412 to move relative to the guide wire body 10 in the axial direction of the guide wire body 10.

[0095] In this embodiment, the operating member 411 is provided with a limiting cavity 4116 and a through hole 4117 connected to the distal end of the limiting cavity 4116. The distal end of the through hole 4117 communicates with the cavity 101. The pulling rod 412 includes a rotating part 4123 disposed in the limiting cavity 4116 and a pulling body 4124 connected to the proximal end of the rotating part 4123. The pulling body 4124 passes through the through hole 4117 and the cavity 101. The proximal end of the pulling wire 42 is connected to the pulling body 4124. The diameter of the rotating part 4123 is larger than the inner diameter of the through hole 4117. The size of the limiting cavity 4116 is larger than the size of the rotating part 4123 and the pulling body 4124. The limiting cavity 4116 is movably connected to the rotating part 4123 and the pulling body 4124. This configuration ensures that the rotation of the operating body 4113 and the connecting rod 4114 does not cause the rotating part 4123 and the pulling body 4124 to rotate, thus ensuring that the rotating part 4123 and the pulling body 4124 only move axially and do not rotate. This allows the pulling rod 412 to rotate relative to the operating member 411 around the central axis of the guide wire body 10. Utilizing the cooperation between the rotating part 4123 and the limiting cavity 4116, the axial movement of the operating part 411 can drive the pulling rod 412 to move axially.

[0096] Example 1.3

[0097] The differences between Example 1.3 and Examples 1.1 and 1.2 will be described below. The similarities or similarities between Example 1.3 and Examples 1.1 and 1.2 will not be repeated here.

[0098] In this embodiment, as Figures 11 to 13 As shown, the operating component 41 includes an operating element 411, a pulling rod 412, and a locking element 413. The operating element 411 includes an operating body 4113 and a connecting rod 4114 connected to the distal end of the operating body 4113. The connecting rod 4114 is movably inserted into the cavity 101. The operating element 411 is provided with a locking part 4115. The locking element 413 is detachably installed on the guide wire body 10 and cooperates with the locking part 4115 to switch between a locked state and an unlocked state between the operating element 411 and the guide wire body 10. In the locked state, the operating element 411 is relatively fixed to the guide wire body 10. In the unlocked state, the operating element 411 can move relative to the guide wire body 10 along the axial direction of the guide wire body 10. The pulling rod 412 is movably inserted into the cavity 101 and connected to the operating element 411. The proximal end of the pulling wire 42 is connected to the pulling rod 412.

[0099] In this embodiment, the locking part 4115 is configured as a protrusion protruding from the outer peripheral surface of the connecting rod 4114. The guide wire body 10 is provided with a limiting groove 103 extending axially along the guide wire body 10. The limiting groove 103 communicates with the cavity 101. At least a portion of the locking part 4115 is inserted into the limiting groove 103 radially along the guide wire body 10. In the locked state, the locking member 413 is inserted into the limiting groove 103 and connected to the locking part 4115, thereby restricting the sliding of the locking part 4115 within the limiting groove 103. At this time, the operating member 411 and the guide wire body 10 remain relatively fixed. After the locking member 413 is removed from the limiting groove 103, the locking member 413 separates from the locking part 4115, and the locking part 4115 can move within the limiting groove 103, thereby allowing the operating member 411 to slide relative to the guide wire body 10 axially.

[0100] In this embodiment, by utilizing the cooperation between the proximal and distal sidewalls of the limiting groove 103 and the locking part 4115, the movement position of the operating member 411 relative to the guide wire body 10 can be restricted. When the limiting part abuts against the proximal sidewall of the limiting groove 103, the operating member 411 is in the second position. The operating member 41 applies a second pulling force toward the proximal end to the blocking member 22 through the pulling wire 42. The blocking member 22 simultaneously bears the first pulling force and the second pulling force, and the boss assembly 20 is in a radially extended state. When the limiting part abuts against the distal sidewall of the limiting groove 103, the operating member 411 is in the first position. At this time, the pulling wire 42 does not apply a second pulling force toward the proximal end to the blocking member 22. The blocking member 22 only bears the first pulling force toward the distal end applied by the first pulling assembly 30, and the boss assembly 20 is in a radially contracted state.

[0101] In this embodiment, as Figures 11 to 13 As shown, the limiting groove 103 includes a first part 1031, a second part 1032 and a third part 1033 connected in sequence. The second part 1032 extends along the axial direction of the guide wire body 10, and the first part 1031 and the third part 1033 extend along the radial direction of the guide wire body 10. The proximal ends of the first part 1031 and the second part 1032 are connected, and the distal ends of the third part 1033 are connected.

[0102] When the locking part 4115 is located in the first part 1031, the operating member 411 is in the second position. The locking member 413 is a silicone plug, and the diameter of the locking member 413 is larger than the width of the limiting groove 103. When the locking member 413 is inserted into the connection between the second part 1032 and the first part 1031, the locking member 413 is press-fitted with the limiting groove 103, and the locking part 4115 is restricted in the first part 1031. The locking part 4115 cannot move into the second part 1032. Thus, the first part 1031 is used to restrict the locking part 4115 from moving relative to the guide wire body 10 along the axial direction of the guide wire body 10, so that the operating member 411 is in a locked state. After removing the locking member 413 from the limiting groove 103, the locking part 4115 is moved from the first part 1031 to the second part 1032 by rotating the operating member 411. At this time, the locking part 4115 can slide in the second part 1032, so that the operating member 411 can move axially relative to the guide wire body 10, and the operating member 411 is in the unlocked state.

[0103] When the locking part 4115 is located in the third part 1033, the operating member 411 is in the first position. When the locking member 413 is inserted into the connection between the second part 1032 and the third part 1033, the locking member 413 is press-fitted with the limiting groove 103, and the locking part 4115 is restricted within the third part 1033. The locking part 4115 cannot move into the second part 1032. Thus, the third part 1033 restricts the movement of the locking part 4115 relative to the guide wire body 10 along the axial direction of the guide wire body 10, so that the operating member 411 is in a locked state. After the locking member 413 is removed from the limiting groove 103, by rotating the operating member 411, the locking part 4115 is moved from the third part 1033 to the second part 1032. At this time, the locking part 4115 can slide within the second part 1032, so that the operating member 411 can move axially relative to the guide wire body 10, so that the operating member 411 is in an unlocked state.

[0104] Example 1.4

[0105] The differences between Example 1.4 and Example 1.3 will be described below. The similarities or similarities between Example 1.4 and Example 1.3 will not be repeated here.

[0106] In this embodiment, please refer to Figure 13 , Figure 14 and Figure 15As shown, to ensure the overall flatness and uniformity of support strength of the guidewire body 10, a covering film 106 can be attached to the limiting groove 103. The covering film 106 is made of polymer material and can be installed on the limiting groove 103 of the guidewire body 10 by heat shrinking or other methods. After the covering film 106 is installed, the overall outer surface of the guidewire body 10 is flatter and the force is more uniform, ensuring the uniformity of support strength. After the covering film 106 is installed, to facilitate the doctor's judgment of the position of the locking part 4115, an indicator part 107 is provided on the operating body 4113. In this way, the position of the operating body 4113 on the limiting groove 103 can be determined by the position of the indicator part 107.

[0107] In other variations of this embodiment, the limiting groove 103 may not extend to the outer surface of the guidewire body 10; that is, the limiting groove 103 may only be provided on the inner wall of the guidewire body 10, and the locking part 4115 may be installed within the limiting groove 103. This arrangement ensures the overall flatness and uniformity of the support strength of the guidewire body 10. The position of the operating body 4113 within the limiting groove 103 is then determined by the position of the externally located indicator 107. It should be noted that the position of the limiting groove 103 on the guidewire body 10 is not limited; the limiting groove 103 may be located at the distal end or the proximal end of the guidewire body 10.

[0108] Example 2

[0109] The differences between Example 2 and Example 1 will be described below. The similarities or similarities between Example 2 and Example 1 will not be repeated here.

[0110] In this embodiment, as Figure 20 and Figure 21 As shown, the boss assembly 20 includes a fixed seat 211, multiple blocking members 22, multiple connecting rods 23, and a sliding tube 24. The fixed seat 211 is sleeved on the loading part 12 of the guide wire body 10 and fixedly connected to the loading part 12. The sliding tube 24 is slidably sleeved on the loading part 12 and located on one side of the far end of the fixed seat 211. One end of the blocking member 22 is hinged to the fixed seat 211, and the other end of the blocking member 22 is hinged to one end of a connecting rod 23. The other end of the connecting rod 23 is hinged to the sliding tube 24. The fixed seat 211, the blocking member 22, the connecting rod 23, and the sliding tube 24 together form a crank-slider mechanism. The proximal end of the first elastic member 31 is connected to the sliding tube 24, and the distal end of the drawing wire 42 is connected to the sliding tube 24.

[0111] In this embodiment, as Figure 20As shown, when the boss assembly 20 only bears the first tension of the first elastic member 31, the sliding tube 24 has a tendency to slide towards the far end under the drive of the first tension, and the sliding tube 24 pulls the connecting rod 23 to move towards the far end, and the blocking member 22 deflects towards the far end, so that the whole composed of multiple blocking members 22 is in a radially contracted state.

[0112] like Figure 21 As shown, when the rotating operating member 411 is rotated and a second pulling force is applied to the sliding tube 24 through the pulling rod 412 and the pulling wire 42, the sliding tube 24 is pulled to the proximal side under the action of the second pulling force. The sliding tube 24 then pushes the connecting rod 23 to move towards the proximal end, and the blocking member 22 deflects towards the proximal end, so that the whole composed of multiple blocking members 22 is in a radially extended state.

[0113] It should be noted that in this embodiment, the blocking member 22 can be configured as a round rod structure or a plate structure.

[0114] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A guidewire, characterized in that, The guidewire includes: Guidewire body; A boss assembly is sleeved on the distal side of the guidewire body; The first traction assembly connects the distal end of the guidewire body to the boss assembly and can apply a first pulling force toward the distal end to the boss assembly; The second traction assembly connects the proximal side of the guidewire body to the boss assembly. The second traction assembly is configured to apply a second pulling force toward the proximal direction to the boss assembly under the action of an external force. Specifically, when the boss assembly only bears the first tensile force, the boss assembly is in a radially contracted state; when the boss assembly bears both the first tensile force and the second tensile force, the boss assembly is in a radially extended state, and the outer diameter of the boss assembly in the extended state is greater than the outer diameter of the boss assembly in the contracted state.

2. The guidewire according to claim 1, characterized in that, The boss assembly includes a fixing component and multiple blocking components. The fixing component is sleeved on the outside of the guide wire body. The multiple blocking components are arranged sequentially at intervals around the fixing component in the circumferential direction, and each blocking component is connected to the fixing component. The first traction assembly and the second traction assembly are both connected to the blocking components to drive the blocking components to move.

3. The guidewire according to claim 2, characterized in that, The fixing component includes a fixing seat and multiple hinge plates. The fixing seat is sleeved on the outside of the guide wire body. The multiple hinge plates are arranged sequentially around the fixing seat at circumferential intervals and are connected to the outer circumferential surface of the fixing seat. Each blocking member is hinged to a hinge plate through a hinge shaft. The axis of the hinge shaft is perpendicular to or at an angle to the axis of the guide wire body.

4. The guidewire according to claim 2, characterized in that, The first traction assembly includes a plurality of first elastic elements, the distal end of each first elastic element being connected to the distal end of the guide wire body, and the proximal end of each first elastic element being connected to a blocking element.

5. The guidewire according to claim 2, characterized in that, The second traction component includes: An operating component is movably connected to the proximal end of the guidewire body and is movable relative to the guidewire body along the axial direction of the guidewire body. Multiple drawing wires, each drawing wire having its distal end connected to one of the blocking members, and its proximal ends connected to the operating component.

6. The guidewire according to claim 5, characterized in that, The guidewire body has a cavity extending along the axial direction of the guidewire body and a plurality of through holes communicating with the cavity. The proximal end of the cavity forms a first opening, and the distal end of the through holes forms a second opening on the outer peripheral surface of the guidewire body. The operating component is movably inserted into the cavity through the first opening, each of the pulling wires is inserted into one of the through holes, and the proximal end of the pulling wire is located in the cavity and connected to the operating component, while the distal end of the pulling wire extends out of the guide wire body through the second opening.

7. The guidewire according to claim 6, characterized in that, The operating component includes an operating member and a pulling rod. The operating member is rotatably connected to the proximal end of the guide wire body. The distal end of the operating member is provided with a first threaded hole. The first threaded hole extends along the axial direction of the guide wire body and communicates with the cavity. The outer peripheral surface of the pulling rod is provided with a first external thread that is threadedly engaged with the first threaded hole. The pulling rod is movably inserted into the cavity and threadedly connected to the first threaded hole. The proximal end of the pulling wire is connected to the pulling rod.

8. The guidewire according to claim 6, characterized in that, The operating component includes an operating member and a pulling rod. The outer peripheral surface of the operating member is provided with a second external thread, and the inner wall of the cavity is provided with a second internal thread that mates with the second external thread. The operating member is inserted into the cavity and threadedly connected to the guide wire body. The pulling rod is movably inserted into the cavity, and the proximal end of the pulling rod is movably connected to the operating member. The proximal end of the pulling wire is connected to the pulling rod.

9. The guidewire according to claim 6, characterized in that, The operating component includes an operating member, a pulling rod, and a locking member. The operating member is movably inserted into the cavity. The operating member is provided with a locking part. The locking member is detachably installed on the guidewire body and cooperates with the locking part to switch between a locked state and an unlocked state between the operating member and the guidewire body. In the locked state, the operating member is relatively fixed to the guidewire body. In the unlocked state, the operating member can move relative to the guidewire body along the axial direction of the guidewire body. The traction rod is movably inserted into the cavity and connected to the operating element, and the proximal end of the traction wire is connected to the traction rod.

10. The guidewire according to claim 9, characterized in that, The guide wire body is provided with a limiting groove extending along the axial direction of the guide wire body. The limiting groove communicates with the cavity. At least a portion of the locking part is inserted into the limiting groove along the radial direction of the guide wire body. In the locked state, the locking member is inserted into the limiting groove and connected to the locking part. In the unlocked state, the locking member disengages from the limiting groove and separates from the locking part.

11. The guidewire according to any one of claims 7 to 10, characterized in that, The second traction assembly further includes a limiting member, which is disposed in the cavity and connected to the inner wall of the cavity. The traction rod is provided with a sliding part that penetrates the inner and outer surfaces of the traction rod, and the limiting member passes through the sliding part.

Images