Bending-adjustable guide wire assembly

Abstract

The invention provides a bending-adjustable guide wire assembly, and relates to the field of medical instruments, and a guide wire main body comprises a core tube, a bending-adjustable outer tube and a bending-adjustable inner tube; the core tube comprises a core tube near-end section and a core tube far-end section which is pre-bent into a curled shape; the bending adjusting outer pipe is arranged outside the core pipe in a sleeving mode, at least the far-end pipe section of the bending adjusting outer pipe is a reed winding pipe, and the far-end portion of the reed winding pipe is bent into a curled pre-bending section along with the far-end section of the core pipe. The bending-adjusting inner pipe axially slides between the core pipe and the bending-adjusting outer pipe, and the hardness of the bending-adjusting inner pipe is larger than that of the reed winding pipe. When the bending adjusting inner tube slides axially, the far-end tube section of the bending adjusting inner tube can extend into the far-end direction or withdraw from the pre-bending section of the reed winding tube in the near-end direction, so that the bending degree of the pre-bending section of the reed winding tube is changed, and the bending degree of the far-end section of the core tube is further changed. The adjustable bending guide wire assembly is simple in structure, easy to produce and convenient to operate, the adjustable range of the angle of the head end of the guide wire is not limited within 360 degrees, the adjustable range is wider, and the adjustable bending guide wire assembly can adapt to the complex intracavity environment more easily.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to an adjustable curved guide wire assembly. Background Art

[0002] Guidewires, also known as guide wires or guide wires, are one of the main tools for percutaneous puncture and intubation. Guidewires guide and support the catheters and are used to guide medical devices such as catheters and delivery sheaths into blood vessels and other human cavities and reach designated locations or lesions smoothly. However, due to the inherent curvature of blood vessels and the complex anatomical structure of the human body, guidewires may bend and coil in the lumen, thus affecting their permeability.

[0003] During use, doctors gradually realized that traditional guidewires have some problems, mainly including: traditional guidewires are not adjustable and have a single distal bend design. Each guidewire adopts a fixed bend design, which means that they are only suitable for specific types of blood vessels or cavity structures. When encountering different tortuosity situations, guidewires with fixed bends may encounter jamming problems and cannot pass through complex anatomical pathways smoothly. Due to the differences in anatomical structures of different patients and the different degrees and types of tortuosity that may occur during the same operation, a guidewire with a single bend cannot meet all clinical needs.

[0004] In response to this, engineers in the medical field have developed some adjustable bend guidewires to alleviate the above technical problems. The structure of these adjustable bend guidewires is introduced using the existing patent authorization announcement number CN204972649U as an example: The existing patent authorization announcement number CN204972649U discloses an internal medicine intervention adjustable bend fishing guidewire, whose bend control end is composed of a handle base, a handle screw rod, an adjustment wire and a metal adjustment ring. Through the threaded cooperation between the handle screw rod and the handle base, the adjustment wire is pulled to move toward the proximal end, driving the metal adjustment ring to achieve the bend adjustment of the distal spring segment. Although these guidewires represented by the existing patent authorization announcement number CN204972649U can achieve a certain bend adjustment function, there are still some problems, mainly including: (1) The product structure is complex, with many parts, high requirements for production technology and high operation complexity; (2) The adjustment wire is parallel to the guide wire. During the bending process, not only the distal end of the guide wire is bent, but the proximal end will also bend due to force. This bending state will lead to poor twist control of the guide wire, which is not conducive to pointing the guide wire to the specified position in the cavity; (3) The bending angle is limited. Although the existing adjustable guide wire can adjust the bending angle of its front end to a certain extent, the range of angle change that can be achieved is still relatively limited, which is not enough to cope with some complex intracavitary environments; (4) The guidewire body is fixedly connected to the operating handle. After the guidewire reaches the specified position, the bending handle cannot be removed, which is not conducive to the exchange of catheters through the guidewire; (5) In the prior art, the hardness of the guidewire is single and cannot be adjusted. Most guidewires have a single hardness or a segmented gradual hardness. As the guidewire passes through a tortuous environment, the hardness requirements for its proximal and distal ends may not be fixed. Therefore, the hardness of the existing guidewire is not highly compatible with the tortuous vascular environment, which can easily damage the blood vessels or fail to reach the target location. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustable curved guidewire assembly to alleviate the technical problems existing in the prior art.

[0006] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions: The embodiment of the present invention provides an adjustable bend guidewire assembly, comprising a guidewire body, wherein the guidewire body comprises a core tube, an adjustable bend inner tube and an adjustable bend outer tube; wherein: The core tube comprises a core tube proximal end section and a core tube distal end section pre-bent into a curled shape; The outer bending tube is sleeved on the outside of the core tube, and at least the distal tube section thereof is a spring tube, and the distal end of the spring tube is sleeved on the outside of the distal section of the core tube to form a pre-bent section that follows the distal section of the core tube and bends into a curled shape; The inner bending tube is axially slidably disposed between the outer tube wall of the core tube and the inner tube wall of the outer bending tube, and the hardness of the inner bending tube is greater than the hardness of the spring tube; The inner bending tube is axially slid relative to the core tube and the outer bending tube, and the distal tube section of the inner bending tube can extend into the pre-bent section of the spring tube in the distal direction or withdraw from the pre-bent section of the spring tube in the proximal direction, thereby changing the curvature of the pre-bent section of the spring tube and further changing the curvature of the distal section of the core tube.

[0007] The embodiments of the present invention can achieve at least the following beneficial effects: In the above-mentioned adjustable bend guidewire assembly provided in this embodiment, the distal tube section of the bend-adjusting inner tube is a straight tube section. When it extends into the pre-bent section of the reed tube in the distal direction, it will bring the proximal area of ​​the pre-bent section back to straightness. Since the pre-bent section is also a part of the reed tube, the spring spacing of the pre-bent section is reduced, and the pre-bent section pulls the curled core tube distal section inside it, so that the curvature (curl) of the core tube distal section changes accordingly. When the straight distal tube section of the bend-adjusting inner tube is withdrawn from the reed tube in the proximal direction, the pre-bent section and the core tube distal section self-rebound to the prefabricated curvature, thereby adjusting the distal curvature of the guidewire body according to the actual vascular tortuosity of the patient.

[0008] The present embodiment has a simple structure and is easy to produce. In terms of the adjustment method, the adjustment is performed by axially sliding the inner bending tube relative to the other two layers of tubes on the basis of the core tube, the inner bending tube and the outer bending tube. This is convenient for operation and will not affect the twist control of the guide wire body due to the adjustment process. Thus, the directionality is stronger and it is more conducive to the guide wire body pointing to the designated position in the cavity. In addition, since the pre-bent section of the spring tube and the distal section of the core tube inside it can be prefabricated into a curled shape, the number of curled circles is not limited, for example, it can be half a circle, one circle, two circles, etc., and the number of circles can be adjusted by controlling the degree of straightening. Therefore, it can adapt to the tortuosity of the blood vessels at any angle (including greater than or equal to 360°) in space, and the adjustable range of the angle of the head end of the guide wire body is wider, which is more conducive to adapting to the complex cavity environment.

[0009] In addition, the embodiment of the present invention also has multiple optional implementation modes, including: In an optional embodiment, in the core tube, at least the distal section of the core tube is a solid tube section, and the distal end of the proximal section of the core tube is transitionally connected with the proximal end of the distal section of the core tube via a gradually tapered transition section whose diameter gradually decreases from the proximal end to the distal end.

[0010] In an optional embodiment, the bending outer tube also includes a straight proximal connecting tube; an initial positioning structure for initially positioning the bending outer tube on the bending inner tube is also provided between the inner tube wall of the proximal connecting tube and the outer tube wall of the bending inner tube; the initial positioning structure includes an arc-shaped positioning groove provided on one of the inner tube wall of the proximal connecting tube and the outer tube wall of the bending inner tube, and an arc-shaped positioning protrusion provided on the other.

[0011] In an optional embodiment, the adjustable bend guide wire assembly also includes an adjusting core wire for adjusting the hardness of the guide wire body; at least the proximal section of the core tube in the core tube is a hollow tube section, the distal end of the adjusting core wire is inserted into the interior of the core tube from the proximal tube opening of the proximal section of the core tube, the proximal end of the adjusting core wire is exposed outside the core tube, and the adjusting core wire can slide axially relative to the core tube.

[0012] In an optional embodiment, the bending adjustment outer tube further comprises a straight proximal connecting tube; the proximal connecting tube, the proximal end section of the core tube and the bending adjustment inner tube are all hard rigid tubes; The adjustable curved guidewire assembly also includes a handle tube, a first fixed sleeve and a second fixed sleeve; The first fixed sleeve is nested in the handle tube, and the proximal end section of the core tube is nested and connected to the first fixed sleeve by interference fit; The second fixed sleeve is arranged between the outer tube wall of the proximal section of the core tube and the inner tube wall of the proximal section of the bending inner tube and frictionally cooperates with the outer tube wall of the proximal section of the core tube and the inner tube wall of the proximal section of the bending inner tube respectively.

[0013] In an optional embodiment, the diameter of the distal tube segment of the first fixed sleeve is smaller than the diameter of the proximal tube segment, thereby forming a stepped hole between the outer circumferential surface of the distal tube segment of the first fixed sleeve and the inner circumferential surface of the distal tube segment of the handle tube; the proximal tube segment of the bending inner tube is inserted into the stepped hole and frictionally fits with the hole wall of the stepped hole.

[0014] In an optional embodiment, the adjustable bend guidewire assembly further comprises a detachable operating handle, wherein the detachable operating handle comprises a handle shell, a handle tube fixing assembly, an adjustable bend outer tube fixing assembly, an adjustable bend inner tube driving assembly and an adjustable bend inner tube locking member; The handle shell is provided with a handle shell inner cavity extending in the axial direction and at least passing through the distal end surface of the handle shell, and at least the portion of the guide wire body located on the proximal side of the proximal connecting tube and the entire proximal connecting tube are inserted into the handle shell inner cavity; At least part of the handle tube fixing assembly is arranged in the handle shell inner cavity and frictionally cooperates with the outer tube wall of the handle tube, thereby fixing the handle tube in the handle shell inner cavity; at least part of the bending outer tube fixing assembly is arranged in the handle shell inner cavity and frictionally cooperates with the outer tube wall of the proximal connecting tube, thereby fixing the proximal connecting tube in the handle shell inner cavity; The handle shell is provided with a long driving hole which penetrates the shell wall of the handle shell in the radial direction and extends in the axial direction of the handle shell; a part of the inner tube bending adjustment driving assembly passes through the long driving hole and extends into the inner cavity of the handle shell to frictionally cooperate with the outer tube wall of the proximal tube section of the inner tube bending adjustment, and another part of the inner tube bending adjustment driving assembly is located outside the handle shell; the inner tube bending adjustment driving assembly can slide axially relative to the handle shell along the long driving hole to carry the inner tube bending adjustment to slide axially along the handle shell; The inner tube bending adjustment locking piece is movably mounted on the outside of the handle shell, and is used to lock the inner tube bending adjustment driving assembly to the handle shell when the inner tube bending adjustment driving assembly axially slides into place.

[0015] Further, in an optional embodiment, the handle tube fixing assembly, the bending outer tube fixing assembly and the bending inner tube driving assembly respectively include at least one group of extrusion assemblies, each group of the extrusion assemblies respectively includes two extrusion structures symmetrically arranged on both sides of the handle shell along the radial direction of the handle shell, each of the extrusion structures respectively includes a columnar connecting member and a soft friction pad connected to one end of the columnar connecting member, the soft friction pad is arranged inside the inner cavity of the handle shell, and the columnar connecting member passes through the shell wall of the handle shell along the radial direction of the handle shell, wherein: The soft friction pad of the handle tube fixing assembly is frictionally matched with the outer tube wall of the handle tube; one end of the columnar connecting member of the handle tube fixing assembly away from the inner cavity of the handle shell is fixed to the handle shell through a fixing member; The soft friction pad of the bending outer tube fixing assembly is frictionally matched with the outer tube wall of the proximal connecting tube; one end of the columnar connecting member of the bending outer tube fixing assembly away from the inner cavity of the handle shell is fixed to the handle shell through another fixing member; The soft friction pad of the bending inner tube driving assembly is frictionally matched with the outer wall of the proximal tube section of the bending inner tube; the columnar connecting piece of the bending inner tube driving assembly passes through the driving long hole and its end away from the inner cavity of the handle shell is exposed to the outside of the handle shell, and the bending inner tube locking piece is transmission connected to the columnar connecting piece of the bending inner tube driving assembly, and is used to lock the columnar connecting piece of the bending inner tube driving assembly to the handle shell when the bending inner tube driving assembly slides axially into place.

[0016] Further, in an optional embodiment, the handle shell includes a first shell member, a second shell member, a third shell member and a fourth shell member; The second shell member includes a cylindrical body and an end plate connected to the distal end of the cylindrical body and extending radially outward along the cylindrical body. The handle shell inner cavity is provided inside the cylindrical body, and the handle shell inner cavity extends along the axial direction of the cylindrical body and passes through the end plate; the proximal end of the cylindrical body is docked with the distal end of the first shell member through a shell docking member, and the proximal end surface of the end plate and the distal end surface of the first shell member face each other; two rows of first ratchet teeth are respectively arranged on the proximal end surface of the end plate and the distal end surface of the first shell member along the radial direction of the cylindrical body on both sides of the cylindrical body; The third shell member and the fourth shell member are respectively arranged on both sides of the cylindrical body along the radial direction of the cylindrical body, and second ratchet teeth are respectively provided on the two end surfaces of the third shell member and the fourth shell member along the axial direction of the cylindrical body; the second ratchet teeth on the proximal end surfaces of the third shell member and the fourth shell member are respectively meshed with the first ratchet teeth on the distal end surface of the first shell member, and the second ratchet teeth on the distal end surfaces of the third shell member and the fourth shell member are respectively meshed with the first ratchet teeth on the proximal end surface of the end plate, and the meshing direction of the first ratchet teeth and the second ratchet teeth allows the third shell member and the fourth shell member to approach each other in the radial direction of the cylindrical body and prevents the third shell member and the fourth shell member from moving away from each other in the radial direction of the cylindrical body; In the handle tube fixing assembly and the bending outer tube fixing assembly, respectively: at least one columnar connecting member of the extruded structure passes through the third shell member and the tubular body, and is fixedly connected to the third shell member via a fixing member; at least one columnar connecting member of the extruded structure passes through the fourth shell member and the tubular body, and is fixedly connected to the fourth shell member via a fixing member; In the inner tube bending drive assembly, at least one of the columnar connecting members of the extruded structure passes through an axial long hole that is radially penetrating and extending in the axial direction and is provided on the third shell member, and at least one of the columnar connecting members of the extruded structure passes through an axial long hole that is radially penetrating and extending in the axial direction and is provided on the fourth shell member; The inner tube bending adjustment locking member is movably mounted outside the third housing member and the fourth housing member and is drivingly connected to the columnar connecting member of the inner tube bending adjustment driving assembly.

[0017] Further, in an optional embodiment, the inner tube bending locking member includes a knob sleeve, and a knob thread is provided on the outer circumference of the third shell member and the fourth shell member around the circumference of the cylindrical body and extending along the axial direction of the cylindrical body; the knob sleeve is sleeved on the outside of the third shell member and the fourth shell member and is threadedly connected with the knob thread; An end buckle is respectively provided at one end of the columnar connecting piece of the bending inner tube driving assembly away from the cylindrical body, and an annular groove extending circumferentially along the cylindrical body is provided on the proximal surface of the knob sleeve, and the end buckle is buckled in the annular groove; the knob sleeve rotates circumferentially around the cylindrical body and can slide axially along the cylindrical body with the bending inner tube driving assembly.

[0018] In an optional embodiment, the shell docking member includes a columnar plug-in portion and a blocking portion connected to one end of the columnar plug-in portion, an axial insertion hole axially penetrating the columnar plug-in portion and the blocking portion is provided inside the columnar plug-in portion; an external thread is provided on the outer surface of the distal end of the columnar plug-in portion; The proximal end of the second shell member is provided with a connecting hole which passes through the proximal surface of the second shell member, the connecting hole is communicated with the inner cavity of the handle shell, and an internal thread is provided on the hole wall of the connecting hole; the columnar insertion portion passes through the first shell member and is inserted into the connecting hole and is threadedly connected with the connecting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the overall structure of an optional implementation of the guidewire body in the adjustable bend guidewire assembly provided by the present invention (without an adjustment core wire); Figure 2 for Figure 1 A fractured view of the structure shown; Figure 3 for Figure 1 A magnified view of the local structure of area A in the middle; Figure 4 for Figure 1 A magnified view of the local structure of the middle B area; Figure 5 for Figure 1 A magnified view of the local structure of the middle C area; Figure 6 A schematic diagram of the overall structure of the adjustable core wire in another optional implementation of the guide wire body in the adjustable bend guide wire assembly provided by the present invention; Figure 7 for Figure 6 A fractured view of the regulatory core wire shown; Figure 8 A schematic diagram of the overall structure of an optional implementation of a detachable operating handle in the adjustable curved guidewire assembly provided by the present invention; Fig. 9 for Figure 8 A schematic diagram of the structure in which a driving slot is provided on the cylindrical body of the second housing member; Fig.10 In the adjustable curved guidewire assembly provided by the present invention, Figure 6 The guidewire body shown is Figure 8 A schematic diagram of the assembly structure of the detachable operating handle shown; Fig.11 for Fig.10 A fractured view of the assembly shown; Fig.12 for Fig.10 A magnified view of the local structure of the middle D area; Fig.13 for Fig.10 A magnified view of the local structure of the middle E area; Fig.14 for Fig.10 A magnified view of the local structure of the F region.

[0021] Icons: 100-guidewire body; 1-core tube; 11-core tube proximal section; 12-core tube distal section; 13-gradual tapered transition section; 2-adjustable outer tube; 21-spring tube; 22-proximal connecting tube; 220-initial positioning structure; 2201-arc-shaped positioning groove; 2202-arc-shaped positioning protrusion; 211-pre-bend section; 3-adjustable inner tube; 4-adjustable core wire; 41-core wire handle; 51-handle tube; 52-first fixed sleeve; 521-step hole; 53-second fixed sleeve; 200-detachable operating handle; 6-handle shell; 601-first ratchet; 602-second ratchet; 603-rotor Button thread; 61-first shell member; 62-second shell member; 621-cylindrical body; 622-end plate; 63-third shell member; 64-fourth shell member; 6001-inner cavity of handle shell; 6002-long drive hole; 65-shell docking member; 650-axial socket; 651-columnar plug-in portion; 652-blocking portion; 7-handle tube fixing assembly; 8-bending outer tube fixing assembly; 9-bending inner tube driving assembly; 10-bending inner tube locking member; 101-knob sleeve; 1011-annular groove; 201-columnar connecting member; 2011-end buckle; 202-soft friction pad; 203-fixing member. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that like reference numerals and letters denote similar items in the drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present invention, it should be noted that: Unless otherwise clearly specified and limited, the terms "disposed", "installed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The orientation or position relationship indicated by the terms "proximal", "distal", "front end", "rear end", "axial", "radial", "inner", "outer", etc. is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] The terms “first”, “second”, etc. are only used for distinguishing descriptions and do not indicate the total number or relative position in time and / or space, and cannot be understood as indicating or implying relative importance.

[0028] Below, the end of the medical device close to the operator during surgery is referred to as the proximal end of the medical device, and the end of the medical device entering the patient's blood vessel is referred to as the distal end of the medical device (the front end of the medical device is the distal end, and the rear end of the medical device is the proximal end); in conjunction with the accompanying drawings, some embodiments of the present invention are described in detail.

[0029] This embodiment provides an adjustable curved guidewire assembly, referring to Figures 1 to 5 The adjustable bend guidewire assembly provided in this embodiment includes a guidewire body 100, which includes a core tube 1, an adjustable bend outer tube 2, and an adjustable bend inner tube 3, wherein: the core tube 1 includes a core tube proximal section 11 and a core tube distal section 12 pre-bent into a curled shape. The adjustable bend outer tube 2 is sleeved on the outside of the core tube 1, and at least the distal tube section thereof is a spring tube 21, and the distal end of the spring tube 21 is sleeved on the outside of the core tube distal section 12 to form a pre-bent section 211 that follows the core tube distal section 12 to bend into a curled shape. The adjustable bend inner tube 3 is axially slidably disposed between the outer tube wall of the core tube 1 and the inner tube wall of the adjustable bend outer tube 2, and at least the distal tube section of the adjustable bend inner tube 3 is a straight tube section whose hardness is greater than that of the spring tube 21. When the bending inner tube 3 is axially slid relative to the core tube 1 and the bending outer tube 2, the distal tube section of the bending inner tube 3 can extend into the pre-bent section 211 of the spring tube 21 in the distal direction or withdraw from the pre-bent section 211 in the proximal direction, thereby changing the curvature (curl) of the pre-bent section 211 of the spring tube 21, and further changing the curvature (curl) of the distal section 12 of the core tube.

[0030] It should be particularly noted that the spring tube 21 may be a spirally wound wire tube structure, or may be obtained by spiral slitting of a metal pipe, or may be manufactured by other processes, and the present application does not impose any specific restrictions on this.

[0031] In the above-mentioned adjustable curved guide wire assembly provided in this embodiment, Figure 5 As shown, the distal end tube section of the bend adjusting inner tube 3 is a straight tube section. When it extends into the pre-bent section 211 of the reed tube 21 in the distal direction, it will bring the proximal area of ​​the pre-bent section 211 back to straightness. Since the pre-bent section 211 is also a part of the reed tube 21, the spring spacing of the pre-bent section 211 is reduced, and the pre-bent section 211 pulls the curled core tube distal end section 12 inside it, so that the curvature (curl) of the core tube distal end section 12 changes accordingly. When the straight distal end tube section of the bend adjusting inner tube 3 is withdrawn from the reed tube 21 in the proximal direction, the pre-bent section 211 and the core tube distal end section 12 self-rebound to restore to the pre-fabricated curvature, thereby adjusting the distal curvature of the guide wire body 100 according to the actual vascular tortuosity of the patient.

[0032] The present embodiment has a simple structure and is easy to produce. In addition, the adjustment method is based on the three-layer tube of the core tube 1, the inner tube 3 and the outer tube 2, and the inner tube 3 is axially slid relative to the other two tubes for adjustment, which is convenient for operation and will not affect the twist control of the guide wire body 100 due to the adjustment process. Thus, the directivity is stronger and it is more conducive to the guide wire body 100 pointing to the designated position in the cavity. In addition, since the pre-bent section 211 of the spring tube 21 and the distal section 12 of the core tube inside it can be prefabricated into a curled shape, the number of curled circles is not limited, for example, it can be half a circle, one circle or two circles, etc., and the number of circles is adjusted by controlling the degree of straightening. Therefore, it can adapt to the tortuosity of the blood vessel at any angle (including greater than or equal to 360°) in the space, and the adjustable range of the angle of the head end of the guide wire body 100 is wider, which is more conducive to adapting to the complex cavity environment.

[0033] In the present embodiment, for the more specific structure of the above-mentioned guidewire body 100, optionally, the structure of its core tube 1 can be an overall solid tubular structure or an overall hollow tubular structure, or a combination of a hollow tubular structure and a solid tubular structure. Optionally, at least the distal end section 12 of the core tube is a solid tube section, and the distal end of the proximal end section 11 of the core tube and the proximal end of the distal end section 12 of the core tube are transitionally connected by a gradually tapered transition section 13 whose diameter gradually decreases from the proximal end to the distal end, that is, the diameter of the proximal end section 11 of the core tube is greater than the diameter of the distal end section 12 of the core tube, and the distal end section 12 of the core tube is a solid tube section, which can be regarded as the distal end section 12 of the core tube being a filamentary structure. Therefore, it can be ensured that the proximal end section 11 of the core tube has a certain supporting force to maintain the proximal torsion control of the core tube 1 and ensure that the guidewire tip reaches the target position more accurately, and it can also be ensured that the distal end section 12 of the core tube has good bending plasticity to adapt to various tortuosity angles of the blood vessel.

[0034] Optionally, the bending outer tube 2 includes a straight proximal connecting tube 22 in addition to the distal reed tube 21; the distal end of the proximal connecting tube 22 is fixedly connected to the proximal end of the reed tube 21, such as Figure 4 As shown, an initial positioning structure 220 for initially positioning the outer bending outer tube 2 on the inner bending inner tube 3 is also provided between the inner tube wall of the proximal connecting tube 22 and the outer tube wall of the bending inner tube 3; the initial positioning structure 220 includes an arc-shaped positioning groove 2201 provided on one of the inner tube wall of the proximal connecting tube 22 and the outer tube wall of the bending inner tube 3, and an arc-shaped positioning protrusion 2202 provided on the other. By setting the initial positioning structure 220, the proximal connecting tube 22 of the bending outer tube 2 can be initially positioned with the bending inner tube 3 during use, so as to prevent the head end angle of the guide wire body 100 from "running around" during the process of inserting the guide wire body 100 into the patient's cavity, which is more conducive to the delivery of the guide wire body 100. Since the initial positioning structure 220 is a combination structure of an arc-shaped positioning groove 2201 and an arc-shaped positioning protrusion 2202, when the bending inner tube 3 is axially slid relative to the bending outer tube 2 after being delivered into place, a slight force can be applied to smoothly slide through the arc area of ​​the initial positioning structure 220 to realize the bending function.

[0035] In addition, in an optional implementation of this embodiment, refer to Figure 6 and Figure 7 , combined with Fig.10 , Fig.11 and Fig.14 The adjustable curved guidewire assembly provided in this embodiment may also include an adjusting core wire 4 for adjusting the hardness of the guidewire body 100; at least the core tube proximal section 11 in the core tube 1 is a hollow tube section, the distal end of the adjusting core wire 4 is inserted into the core tube 1 from the proximal tube mouth of the core tube proximal section 11, the proximal end of the adjusting core wire 4 is exposed outside the core tube 1, and the adjusting core wire 4 can slide axially relative to the core tube 1. This design is an improvement made to the problems that the existing guidewire has a single hardness and cannot be adjusted, is not highly adaptable to the tortuous vascular environment, is easy to damage the blood vessel or cannot reach the target position. By pushing the adjusting core wire 4 forward (distal end) or pulling it backward (proximal end), the hardness of the core tube proximal section 11 is changed, and the function of real-time adjustment of the hardness of the core tube proximal section 11 and then real-time adjustment of the hardness of the guidewire body 100 is realized, so that the hardness of the guidewire body 100 can be arbitrarily controlled, thereby adapting to the vascular environment of the region, and smoothly reaching the lesion site without damaging the blood vessel.

[0036] To further improve the delivery and bending stability of the guidewire body 100, continue to refer to Figures 1 to 5In an optional implementation of the adjustable bend guidewire assembly provided in this embodiment, the adjustable bend outer tube 2 further includes a straight proximal connecting tube 22; the proximal connecting tube 22, the proximal section 11 of the core tube and the adjustable bend inner tube 3 are all hard rigid tubes; the adjustable bend guidewire assembly further includes a handle tube 51, a first fixed sleeve 52 and a second fixed sleeve 53. The first fixed sleeve 52 is nested inside the handle tube 51, and the proximal section 11 of the core tube is nested and connected inside the first fixed sleeve 52 by interference fit. The second fixed sleeve 53 is arranged between the outer tube wall of the proximal section 11 of the core tube and the inner tube wall of the proximal section of the adjustable bend inner tube 3, and is frictionally matched with the outer tube wall of the proximal section 11 of the core tube and the inner tube wall of the proximal section of the adjustable bend inner tube 3 respectively. In this structure, the handle tube 51 and the first fixed sleeve 52 fix the proximal section 11 of the core tube, and the second fixed sleeve 53 maintains a gap between the bending inner tube 3 and the proximal section 11 of the core tube, to prevent the bending inner tube 3 from shaking relative to the proximal section 11 of the core tube when the guide wire body 100 is delivered and the axially sliding bending inner tube 3 is bent, thereby improving the stability of the guide wire body 100 when delivering and bending the guide wire body 100.

[0037] Furthermore, the diameter of the distal tube section of the first fixed sleeve 52 can be further designed to be smaller than the diameter of the proximal tube section, thereby forming a stepped hole 521 between the outer circumferential surface of the distal tube section of the first fixed sleeve 52 and the inner circumferential surface of the distal tube section of the handle tube 51; the proximal tube section of the bending inner tube 3 is inserted into the stepped hole 521 and frictionally cooperates with the hole wall of the stepped hole 521, which serves as the initial adjustment position of the bending inner tube 3, further preventing the bending inner tube 3 from shaking during the delivery process, and increasing the delivery stability of the guide wire body 100.

[0038] To further facilitate the operator's operation, refer to Figures 8 to 14 , combined with Figures 1 to 5In some optional implementations of the present embodiment, the adjustable bend guidewire assembly further includes a detachable operating handle 200, which includes a handle shell 6, a handle tube fixing assembly 7, an adjustable outer tube fixing assembly 8, an adjustable inner tube driving assembly 9, and an adjustable inner tube locking member 10. The handle shell 6 is provided with a handle shell inner cavity 6001 extending axially and at least passing through the distal end surface of the handle shell 6, and at least the portion of the guidewire body 100 located at the proximal side of the proximal connecting tube 22 and the entire proximal connecting tube 22 are inserted into the handle shell inner cavity 6001. At least part of the handle tube fixing assembly 7 is disposed in the handle shell inner cavity 6001 to frictionally cooperate with the outer tube wall of the handle tube 51, thereby fixing the handle tube 51 in the handle shell inner cavity 6001. At least part of the adjustable outer tube fixing assembly 8 is disposed in the handle shell inner cavity 6001 to frictionally cooperate with the outer tube wall of the proximal connecting tube 22, thereby fixing the proximal connecting tube 22 in the handle shell inner cavity 6001. The handle shell 6 is provided with a driving long hole 6002 which penetrates the shell wall of the handle shell 6 in the radial direction and extends in the axial direction of the handle shell 6; a part of the inner tube bending driving assembly 9 passes through the driving long hole 6002 and extends into the handle shell inner cavity 6001 to frictionally cooperate with the outer tube wall of the proximal tube section of the inner tube bending 3, and another part of the inner tube bending driving assembly 9 is located outside the handle shell 6; the inner tube bending driving assembly 9 can slide axially relative to the handle shell 6 along the driving long hole 6002 to slide axially along the handle shell 6 with the inner tube bending 3. The inner tube bending locking member 10 is movably installed outside the handle shell 6, and is used to lock the inner tube bending driving assembly 9 to the handle shell 6 when the inner tube bending driving assembly 9 slides axially into place. This optional embodiment provides a detachable operating handle 200, which is assembled with the guidewire body 100 provided by any of the aforementioned optional embodiments. The proximal section 11 of the core tube can be detachably fixed by friction fit between the handle tube fixing component 7 and the handle tube 51, the proximal section of the outer bending outer tube 2 can be detachably fixed by friction fit between the outer bending outer tube fixing component 8 and the proximal connecting tube 22, and the inner bending inner tube 3 can be driven to slide axially by the inner bending inner tube driving component 9. When the inner bending inner tube driving component 9 slides axially into place, the inner bending inner tube driving component 9 is locked by the inner bending inner tube locking member 10 and then the inner bending inner tube 3 is locked, completing the entire process of delivering the guidewire body 100 to the target position. After completion, the detachable operating handle 200 can be removed, and other post-treatment instruments (such as a coated stent delivery sheath) can be inserted along the guidewire body 100 that has been delivered into place. The structural design of the detachable operating handle 200 is based on the friction fit positioning principle. It can be detached from the guidewire body 100 after the guidewire body 100 is delivered into place, and the guidewire body 100 can be used to deliver the rear instrument, which is beneficial for exchanging the sheath of the rear instrument through the guidewire, and solves the problem that the guidewire body 100 is thin and difficult to transport.

[0039] Continue to refer to Figures 8 to 13, further optionally, the handle tube fixing assembly 7, the outer bending tube fixing assembly 8 and the inner bending tube driving assembly 9 respectively include at least one group of extrusion assemblies, each group of extrusion assemblies respectively includes two extrusion structures symmetrically arranged on both sides of the handle shell 6 along the radial direction of the handle shell 6, each extrusion structure respectively includes a columnar connector 201 and a soft friction pad 202 connected to one end of the columnar connector 201, the soft friction pad 202 is arranged inside the handle shell inner cavity 6001, and the columnar connector 201 passes through the shell wall of the handle shell 6 along the radial direction of the handle shell 6. Among them: the soft friction pad 202 of the handle tube fixing assembly 7 is frictionally matched with the outer tube wall of the handle tube 51; the end of the columnar connector 201 of the handle tube fixing assembly 7 away from the handle shell inner cavity 6001 is fixed to the handle shell 6 through a fixing member 203. The soft friction pad 202 of the outer bending tube fixing assembly 8 is frictionally matched with the outer tube wall of the proximal connecting tube 22; the end of the columnar connecting member 201 of the outer bending tube fixing assembly 8 away from the inner cavity 6001 of the handle shell is fixed to the handle shell 6 through another fixing member 203. The soft friction pad 202 of the inner bending tube driving assembly 9 is frictionally matched with the outer tube wall of the proximal tube section of the inner bending tube 3; the columnar connecting member 201 of the inner bending tube driving assembly 9 passes through the driving long hole 6002 on the handle shell 6 and its end away from the inner cavity 6001 of the handle shell is exposed to the outside of the handle shell 6, and the inner bending tube locking member 10 is transmission-connected with the columnar connecting member 201 of the inner bending tube driving assembly 9, and is used to lock the columnar connecting member 201 of the inner bending tube driving assembly 9 to the handle shell 6 when the inner bending tube driving assembly 9 slides axially into place. To facilitate production and manufacturing, especially to facilitate the placement of the soft friction pad 202 of the handle tube fixing assembly 7, the bending outer tube fixing assembly 8 and the bending inner tube driving assembly 9 into the handle shell inner cavity 6001, the handle shell 6 is optionally configured to have at least two half shells that are buckled together to form a multi-shell structure of the handle shell inner cavity 6001.

[0040] Continue to refer to Figures 8 to 13 , focus on Figure 8 and Figures 11 to 13, further optionally, the handle shell 6 includes a first shell member 61, a second shell member 62, a third shell member 63 and a fourth shell member 64; wherein: the second shell member 62 includes a cylindrical body 621 and an end plate 622 connected to the distal end of the cylindrical body 621 and extending radially outward along the cylindrical body 621, and the handle shell inner cavity 6001 is provided inside the cylindrical body 621, and the handle shell inner cavity 6001 extends along the axial direction of the cylindrical body 621 and passes through the end plate 622; the proximal end of the cylindrical body 621 is docked with the distal end of the first shell member 61 through a shell docking member 65, and the proximal end surface of the end plate 622 in the second shell member 62 faces the distal end surface of the first shell member 61; two rows of first ratchet teeth 601 arranged radially on both sides of the cylindrical body 621 along the cylindrical body 621 are respectively provided on the proximal end surface of the end plate 622 in the second shell member 62 and the distal end surface of the first shell member 61. The third housing member 63 and the fourth housing member 64 are respectively arranged on both sides of the cylindrical body 621 along the radial direction of the cylindrical body 621, and second ratchet teeth 602 are respectively arranged on the surfaces of both ends of the third housing member 63 and the fourth housing member 64 along the axial direction of the cylindrical body 621. The second ratchet teeth 602 on the proximal surfaces of the third housing member 63 and the fourth housing member 64 are respectively meshed with the first ratchet teeth 601 on the distal surface of the first housing member 61, and the second ratchet teeth 602 on the distal surfaces of the third housing member 63 and the fourth housing member 64 are respectively meshed with the first ratchet teeth 601 on the proximal surface of the middle end plate 622 of the second housing member 62. The meshing direction of the first ratchet teeth 601 and the second ratchet teeth 602 allows the third housing member 63 and the fourth housing member 64 to approach each other along the radial direction of the cylindrical body 621, and prevents the third housing member 63 and the fourth housing member 64 from moving away from each other along the radial direction of the cylindrical body 621. In the handle tube fixing assembly 7 and the bending outer tube fixing assembly 8, respectively: at least one columnar connector 201 of an extruded structure passes through the third housing member 63 and the cylindrical body 621, and is fixedly connected to the third housing member 63 through a fixing member 203, and at least one columnar connector 201 of an extruded structure passes through the fourth housing member 64 and the cylindrical body 621, and is fixedly connected to the fourth housing member 64 through another fixing member 203. In the bending inner tube driving assembly 9, at least one columnar connector 201 of an extruded structure passes through an axial long hole that is radially penetrating and extending in the axial direction and is provided on the third housing member 63, and at least one columnar connector 201 of an extruded structure passes through an axial long hole that is radially penetrating and extending in the axial direction and is provided on the fourth housing member 64. The inner tube bending locking member 10 is movably mounted outside the third housing member 63 and the fourth housing member 64 and is in driving connection with the columnar connecting member 201 of the inner tube bending driving assembly 9, so as to lock the inner tube bending driving assembly 9 to the third housing member 63 or the fourth housing member 64 when the inner tube bending driving assembly 9 slides axially into place. The second housing member 62 is preferably formed by butting two half housings with arc-shaped grooves to form the handle shell cavity 6001, and the third housing member 63 and the fourth housing member 64 are preferably arc-shaped plates.Since the meshing direction of the first ratchet teeth 601 and the second ratchet teeth 602 allows the third shell member 63 and the fourth shell member 64 to approach each other in the radial direction of the cylindrical body 621 and prevents the third shell member 63 and the fourth shell member 64 from moving away from each other in the radial direction of the cylindrical body 621, the third shell member 63 and the fourth shell member 64 can be approached to each other in the radial direction of the cylindrical body 621 so that each soft friction pad 202 can be tightly held on the corresponding tube wall. When the detachable operating handle 200 needs to be removed, the axial positioning between the first shell member 61 and the second shell member 62 is released, and the axial position is moved away from the first shell member 61 and the second shell member 62. Then, the third shell member 63 and the fourth shell member 64 are moved away from each other in the radial direction of the cylindrical body 621, so that the lock on the guide wire body 100 can be released, and the detachable operating handle 200 can be slid off the guide wire body 100 in the proximal direction.

[0041] For the inner tube locking member 10, a clamp or buckle or other optional locking structural member can be selected for easy operation. Figure 8 Optionally, the above-mentioned bending inner tube locking member 10 includes a knob sleeve 101, and a knob thread 603 is provided on the outer circumference of the third shell member 63 and the fourth shell member 64, which is circumferentially around the cylindrical body 621 and axially extending along the cylindrical body 621; the knob sleeve 101 is sleeved on the outside of the third shell member 63 and the fourth shell member 64 and is threadedly connected with the knob thread 603. An end buckle 2011 is provided at one end of the columnar connecting member 201 of the bending inner tube driving assembly 9 away from the cylindrical body 621, and an annular groove 1011 extending circumferentially along the cylindrical body 621 is provided on the proximal surface of the knob sleeve 101, and the end buckle 2011 is buckled inside the annular groove 1011; when the knob sleeve 101 rotates circumferentially around the cylindrical body 621, it can slide along the axial direction of the cylindrical body 621 with the bending inner tube driving assembly 9, and use the thread to locate the current position for locking.

[0042] Continue to refer to Figure 8The above-mentioned shell docking member 65 includes a columnar plug-in portion 651 and a blocking portion 652 connected to one end of the columnar plug-in portion 651, and an axial insertion hole 650 axially penetrating the columnar plug-in portion 651 and the blocking portion 652 is provided inside the columnar plug-in portion 651; an external thread is provided on the distal outer surface of the columnar plug-in portion 651; a connecting hole penetrating the proximal surface of the second shell member 62 is provided at the proximal end of the second shell member 62, and the connecting hole is connected to the handle shell inner cavity 6001, and an internal thread is provided on the hole wall of the connecting hole; the columnar plug-in portion 651 passes through the first shell member 61 and is inserted into the connecting hole and is threadedly connected to the connecting hole, thereby fixing the proximal end of the second shell member 62 to the first shell member 61. The axial socket 650 of the shell docking piece 65 is connected to the handle shell inner cavity 6001 through the aforementioned connecting hole. When the adjustable bend guide wire assembly also includes an adjusting core wire 4, the adjusting core wire 4 can be inserted into the handle shell inner cavity 6001 from the axial socket 650 of the shell docking piece 65. Preferably, a core wire handle 41 with a radial dimension greater than the diameter of the adjusting core wire 4 is provided at the proximal end of the adjusting core wire 4. The shape of the core wire handle 41 includes but is not limited to a cylindrical shape to further facilitate the operator's operation. Finally, it should be noted that the above embodiments and their optional implementation modes in this specification are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned optional implementation modes, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In addition, it is emphasized again that the features of the embodiments in this specification and the optional implementation modes in the embodiments can be combined with each other without conflict.

Claims

1. An adjustable curved guidewire assembly, characterized in that: The invention comprises a guidewire body (100), wherein the guidewire body (100) comprises: The core tube (1) comprises a core tube proximal end section (11) and a core tube distal end section (12) pre-bent into a curled shape; The outer bending tube (2) is sleeved on the outside of the core tube (1), and at least the distal tube section thereof is a spring tube (21). The distal end of the spring tube (21) is sleeved on the outside of the distal section (12) of the core tube to form a pre-bent section (211) that is bent into a curled shape following the distal section (12) of the core tube. and a bending adjustment inner tube (3), the bending adjustment inner tube (3) being axially slidably disposed between the outer tube wall of the core tube (1) and the inner tube wall of the bending adjustment outer tube (2), and at least a distal tube section of the bending adjustment inner tube (3) being a straight tube section having a hardness greater than that of the spring tube (21); The bending adjustment inner tube (3) is axially slid relative to the core tube (1) and the bending adjustment outer tube (2), so that the distal tube section of the bending adjustment inner tube (3) can extend into the pre-bent section (211) of the spring tube (21) in the distal direction or withdraw from the pre-bent section (211) of the spring tube (21) in the proximal direction, thereby changing the curvature of the pre-bent section (211) of the spring tube (21), and further changing the curvature of the distal section (12) of the core tube.

2. The adjustable curved guidewire assembly according to claim 1, characterized in that: In the core tube (1), at least the core tube distal section (12) is a solid tube section, and the distal end of the core tube proximal section (11) and the proximal end of the core tube distal section (12) are transitionally connected via a gradually tapered transition section (13) whose diameter gradually decreases from the proximal end to the distal end.

3. The adjustable curved guidewire assembly according to claim 1, characterized in that: The bending outer tube (2) further comprises a straight proximal connecting tube (22); an initial positioning structure (220) for initially positioning the bending outer tube (2) on the bending inner tube (3) is provided between the inner tube wall of the proximal connecting tube (22) and the outer tube wall of the bending inner tube (3); the initial positioning structure (220) comprises an arc-shaped positioning groove (2201) provided on one of the inner tube wall of the proximal connecting tube (22) and the outer tube wall of the bending inner tube (3), and an arc-shaped positioning protrusion (2202) provided on the other.

4. The adjustable curved guidewire assembly according to claim 1, characterized in that: The adjustable bend guidewire assembly further comprises an adjusting core wire (4) for adjusting the hardness of the guidewire body (100); at least the core tube proximal section (11) in the core tube (1) is a hollow tube section, the distal end of the adjusting core wire (4) is inserted into the core tube (1) from the proximal tube opening of the core tube proximal section (11), the proximal end of the adjusting core wire (4) is exposed outside the core tube (1), and the adjusting core wire (4) can slide axially relative to the core tube (1).

5. The adjustable curved guidewire assembly according to any one of claims 1 to 3, characterized in that: The bending adjustment outer tube (2) further comprises a straight proximal connecting tube (22); the proximal connecting tube (22), the proximal end section (11) of the core tube and the bending adjustment inner tube (3) are all hard rigid tubes as a whole; The adjustable curved guidewire assembly further comprises a handle tube (51), a first fixed sleeve (52) and a second fixed sleeve (53); The first fixed sleeve (52) is nested inside the handle tube (51), and the core tube proximal section (11) is nested and connected to the inside of the first fixed sleeve (52) by interference fit; The second fixed sleeve (53) is arranged between the outer tube wall of the proximal end section (11) of the core tube and the inner tube wall of the proximal end section of the bending inner tube (3), and is frictionally matched with the outer tube wall of the proximal end section (11) of the core tube and the inner tube wall of the proximal end section of the bending inner tube (3), respectively.

6. The adjustable curved guidewire assembly according to claim 5, characterized in that: The diameter of the distal tube section of the first fixed sleeve (52) is smaller than the diameter of the proximal tube section, so that a stepped hole (521) is formed between the outer circumferential surface of the distal tube section of the first fixed sleeve (52) and the inner circumferential surface of the distal tube section of the handle tube (51); the proximal tube section of the bending adjustment inner tube (3) is inserted into the stepped hole (521) and frictionally fits with the hole wall of the stepped hole (521).

7. The adjustable curved guidewire assembly according to claim 5, characterized in that: The adjustable bend guidewire assembly further comprises a detachable operating handle (200), wherein the detachable operating handle (200) comprises a handle shell (6), a handle tube fixing assembly (7), an adjustable outer tube fixing assembly (8), an adjustable inner tube driving assembly (9) and an adjustable inner tube locking member (10); The handle shell (6) is provided with a handle shell inner cavity (6001) extending in the axial direction and penetrating at least the distal end surface of the handle shell (6); at least a portion of the guide wire body (100) located on the proximal side of the proximal connecting tube (22) and the entire proximal connecting tube (22) are inserted into the handle shell inner cavity (6001); At least part of the handle tube fixing assembly (7) is disposed in the handle shell inner cavity (6001) and frictionally cooperates with the outer tube wall of the handle tube (51), thereby fixing the handle tube (51) in the handle shell inner cavity (6001); at least part of the bending outer tube fixing assembly (8) is disposed in the handle shell inner cavity (6001) and frictionally cooperates with the outer tube wall of the proximal connecting tube (22), thereby fixing the proximal connecting tube (22) in the handle shell inner cavity (6001); The handle shell (6) is provided with a long drive hole (6002) which radially penetrates the shell wall of the handle shell (6) and extends axially along the handle shell (6); a portion of the inner tube bending adjustment drive assembly (9) passes through the long drive hole (6002) and extends into the inner cavity (6001) of the handle shell to frictionally engage with the outer tube wall of the proximal tube section of the inner tube bending adjustment (3), and another portion of the inner tube bending adjustment drive assembly (9) is located outside the handle shell (6); the inner tube bending adjustment drive assembly (9) is capable of axially sliding relative to the handle shell (6) along the long drive hole (6002) to carry the inner tube bending adjustment (3) to slide axially along the handle shell (6); The inner tube bending adjustment locking member (10) is movably mounted on the outside of the handle shell (6) and is used to lock the inner tube bending adjustment driving assembly (9) to the handle shell (6) when the inner tube bending adjustment driving assembly (9) slides axially into place.

8. The adjustable curved guidewire assembly according to claim 7, characterized in that: The handle tube fixing assembly (7), the bending outer tube fixing assembly (8) and the bending inner tube driving assembly (9) respectively comprise at least one group of extrusion assemblies, each group of the extrusion assemblies respectively comprises two extrusion structures symmetrically arranged on both sides of the handle shell (6) along the radial direction of the handle shell (6), each of the extrusion structures respectively comprises a columnar connecting member (201) and a soft friction pad (202) connected to one end of the columnar connecting member (201), the soft friction pad (202) being arranged inside the handle shell inner cavity (6001), the columnar connecting member (201) passing through the shell wall of the handle shell (6) along the radial direction of the handle shell (6), wherein: The soft friction pad (202) of the handle tube fixing assembly (7) is frictionally matched with the outer tube wall of the handle tube (51); one end of the columnar connecting piece (201) of the handle tube fixing assembly (7) away from the handle shell inner cavity (6001) is fixed to the handle shell (6) via a fixing piece (203); The soft friction pad (202) of the bending outer tube fixing assembly (8) is frictionally matched with the outer tube wall of the proximal connecting tube (22); one end of the columnar connecting piece (201) of the bending outer tube fixing assembly (8) away from the inner cavity (6001) of the handle shell is fixed to the handle shell (6) via another fixing piece (203); The soft friction pad (202) of the inner tube bending drive assembly (9) is frictionally matched with the outer tube wall of the proximal tube section of the inner tube bending drive assembly (3); the columnar connecting piece (201) of the inner tube bending drive assembly (9) passes through the long driving hole (6002) and one end thereof away from the inner cavity (6001) of the handle shell is exposed to the outside of the handle shell (6); the inner tube bending lock piece (10) is transmission-connected to the columnar connecting piece (201) of the inner tube bending drive assembly (9) and is used to lock the columnar connecting piece (201) of the inner tube bending drive assembly (9) to the handle shell (6) when the inner tube bending drive assembly (9) slides axially into place.

9. The adjustable curved guidewire assembly according to claim 8, characterized in that: The handle shell (6) comprises a first shell component (61), a second shell component (62), a third shell component (63) and a fourth shell component (64); The second shell member (62) comprises a cylindrical body (621) and an end plate (622) connected to the distal end of the cylindrical body (621) and extending radially outward along the cylindrical body (621); the handle shell inner cavity (6001) is provided inside the cylindrical body (621); the handle shell inner cavity (6001) extends along the axial direction of the cylindrical body (621) and passes through the end plate (622); the proximal end of the cylindrical body (621) is docked with the distal end of the first shell member (61) through a shell docking member (65), and the proximal end surface of the end plate (622) and the distal end surface of the first shell member (61) face each other; two rows of first ratchet teeth (601) are respectively provided on the proximal end surface of the end plate (622) and the distal end surface of the first shell member (61) and are arranged radially along the cylindrical body (621) on both sides of the cylindrical body (621); The third shell member (63) and the fourth shell member (64) are respectively arranged on both sides of the cylindrical body (621) along the radial direction of the cylindrical body (621), and second ratchet teeth (602) are respectively provided on the surfaces of both ends of the third shell member (63) and the fourth shell member (64) along the axial direction of the cylindrical body (621); the second ratchet teeth (602) on the proximal surfaces of the third shell member (63) and the fourth shell member (64) respectively mesh with the first ratchet teeth (601) on the distal surface of the first shell member (61). , the second ratchet teeth (602) on the distal end surfaces of the third housing member (63) and the fourth housing member (64) respectively mesh with the first ratchet teeth (601) on the proximal end surface of the end plate (622), and the meshing direction of the first ratchet teeth (601) and the second ratchet teeth (602) allows the third housing member (63) and the fourth housing member (64) to approach each other along the radial direction of the cylindrical body (621) and prevents the third housing member (63) and the fourth housing member (64) from moving away from each other along the radial direction of the cylindrical body (621); In the handle tube fixing assembly (7) and the bending outer tube fixing assembly (8), respectively: at least one of the columnar connecting members (201) of the extruded structure passes through the third shell member (63) and the tubular body (621), and is fixedly connected to the third shell member (63) via a fixing member (203); and at least one of the columnar connecting members (201) of the extruded structure passes through the fourth shell member (64) and the tubular body (621), and is fixedly connected to the fourth shell member (64) via a fixing member (203); In the inner tube bending drive assembly (9), at least one of the columnar connecting members (201) of the extruded structure passes through an axial long hole that is radially penetrating and extends in the axial direction and is provided on the third shell member (63), and at least one of the columnar connecting members (201) of the extruded structure passes through an axial long hole that is radially penetrating and extends in the axial direction and is provided on the fourth shell member (64); The inner tube bending adjustment locking member (10) is movably mounted outside the third housing member (63) and the fourth housing member (64) and is drivingly connected to the columnar connecting member (201) of the inner tube bending adjustment driving assembly (9).

10. The adjustable curved guidewire assembly according to claim 9, characterized in that: The inner tube bending locking member (10) comprises a knob sleeve (101), and a knob thread (603) is provided on the outer circumferential surface of the third shell member (63) and the fourth shell member (64), which is circumferentially around the cylindrical body (621) and axially extending along the cylindrical body (621); the knob sleeve (101) is sleeved on the outside of the third shell member (63) and the fourth shell member (64) and is threadedly connected to the knob thread (603); An end buckle (2011) is provided at one end of the columnar connecting member (201) of the bending inner tube driving assembly (9) which is away from the cylindrical body (621), and an annular groove (1011) extending circumferentially along the cylindrical body (621) is provided on the proximal surface of the knob sleeve (101), and the end buckle (2011) is buckled inside the annular groove (1011); the knob sleeve (101) rotates circumferentially around the cylindrical body (621) and can slide axially along the cylindrical body (621) with the bending inner tube driving assembly (9).

11. The adjustable curved guidewire assembly according to claim 9, characterized in that: The shell docking member (65) comprises a columnar inserting portion (651) and a blocking portion (652) connected to one end of the columnar inserting portion (651); an axial insertion hole (650) axially penetrating the columnar inserting portion (651) and the blocking portion (652) is provided inside the columnar inserting portion (651); and an external thread is provided on the outer surface of the distal end of the columnar inserting portion (651); The proximal end of the second shell member (62) is provided with a connecting hole which passes through the proximal surface of the second shell member (62), the connecting hole being in communication with the inner cavity (6001) of the handle shell, and an internal thread is provided on the hole wall of the connecting hole; the columnar insertion portion (651) passes through the first shell member (61), is inserted into the connecting hole and is threadedly connected to the connecting hole.

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