Guide wire, control handle and intervention system

Abstract

The invention relates to a guide wire, a control handle and an intervention system. The guidewire includes: an elastic tube; the core wire is fixed to the elastic tube in the axial direction of the elastic tube; the traction wire is fixed in the elastic tube in the axial direction of the elastic tube, the far end of the traction wire is connected with the far end of the core wire, and the near end of the traction wire extends out of the elastic tube to be connected with the control handle; and the coating layer is coated on the elastic tube, the traction wire and the core wire. According to the guide wire, an elastic tube is matched with a traction wire to achieve bending control of the far end of the guide wire, a core wire and the traction wire are fixed to the elastic tube in the axial direction, and after a coating layer is arranged on the outer side, the guide wire is formed. In the operation process, an operator can directly operate the control handle to control the traction wire to drive the far end of the guide wire to be bent, the far end of the guide wire is directly bent to the direction where the bent cavity is located, controllable bending of the far end of the guide wire is achieved, the direction of the guide wire does not need to be adjusted many times, operation time is shortened, operation efficiency is improved, and physical output of the operator is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to a guide wire, a control handle, and an interventional system. Background Art

[0002] With the progress of medical technology, minimally invasive surgery has been rapidly developed and applied due to its small trauma and quick recovery. As a medical consumable relied on in minimally invasive surgery, the guide wire is widely used in both traditional surgical procedures manually operated by doctors and emerging surgical procedures relying on interventional robots. Currently, the guide wire mainly consists of a slender metal wire or plastic wire plus an external sheath, and is used for diagnosis or treatment in the patient's body through blood vessels or other cavities such as the abdominal cavity.

[0003] Generally, the distal end of a medical guide wire is mostly a straight head or a J-shaped head, and the head end has no degree of freedom. Due to the lack of freedom at the distal end of the guide wire, the distal end of the guide wire cannot be steered in real time according to the needs during the operation. When facing multiple branch selections in the interventional channel or when entering a cavity with a tricky angle, the doctor can only pre-shape its head outside the body to make it bend, and then continuously rotate the guide wire to complete the circumferential direction selection. However, this operation method often requires multiple attempts, which greatly extends and consumes the operation time and the doctor's physical strength. Summary of the Invention

[0004] Based on this, in view of the problems such as the complex operation method and increased operation time caused by the need to rotate the guide wire multiple times to complete the circumferential direction selection in the current guide wire, it is necessary to provide a guide wire, a control handle, and an interventional system, which can achieve controllable bending at the distal end, enter the curved cavity without repeatedly adjusting the orientation of the guide wire, shorten the operation time, improve the operation efficiency, and reduce the physical consumption of the operator.

[0005] A guide wire, comprising:

[0006] An elastic tube;

[0007] A core wire fixed axially to the elastic tube along the elastic tube;

[0008] A traction wire fixed axially to the elastic tube in the elastic tube, and the distal end of the traction wire is connected to the distal end of the core wire. The proximal end of the traction wire extends out of the elastic tube, and pulling the traction wire makes the distal end of the guide wire bend; and

[0009] A coating layer covering the elastic tube, the traction wire, and the core wire.

[0010] In an embodiment of the present application, the core wire is fixed to the inner wall or the outer wall of the elastic tube; wherein,

[0011] The distal end of the core wire and the distal end of the traction wire are respectively flush with or protrude from the distal end of the elastic tube; and / or

[0012] The proximal end of the core wire is flush with the proximal end of the elastic tube.

[0013] In one embodiment of the present application, the core wire includes a first wire segment and a second wire segment. The proximal end of the first wire segment is fixed to the elastic tube, the distal end is connected to the proximal end of the second wire segment, and the distal end of the second wire segment is connected to the distal end of the traction wire.

[0014] The diameter of the second wire segment gradually decreases from the proximal end to the distal end.

[0015] In one embodiment of the present application, the elastic tube is a tube with a constant diameter.

[0016] Alternatively, the elastic tube includes a first tube segment and a second tube segment. The distal end of the first tube segment is connected to the proximal end of the second tube segment. The diameter of the second tube segment gradually decreases from the proximal end to the distal end. Or when the second tube segment is a spring tube, the pitch of the second tube segment gradually increases from the proximal end to the distal end.

[0017] In one embodiment of the present application, the coating layer includes a first coating segment, a second coating segment, and a third coating segment. The first coating segment coats the proximal end of the elastic tube, the third coating segment coats the distal end of the elastic tube, and the second coating segment connects the first coating segment and the third coating segment.

[0018] The hardness of the second coating segment is less than that of the first coating segment and greater than that of the third coating segment.

[0019] A control handle, which is matched with the guide wire described in any of the above technical features. The control handle includes a housing, a bending adjustment member, and a transmission device. The transmission device is arranged in the housing. The bending adjustment member is located outside the housing, and one end thereof passes through the housing and is connected to the transmission device. The proximal end of the traction wire of the guide wire is connected to the transmission device, and the bending adjustment member controls the transmission device to drive the guide wire to move proximally so that the distal end of the guide wire bends.

[0020] In one embodiment of the present application, the transmission device includes an input member and an output member that are meshed and connected. The input member is connected to the bending adjustment member, and the traction wire is wound around the output member. The input member rotates to drive the output member to move, thereby driving the proximal end of the guide wire to move and controlling the distal end of the guide wire to bend.

[0021] In one embodiment of the present application, the input member is a worm gear and the output member is a worm. The helix angles of the worm gear and the worm are less than the corresponding friction angles, so that the worm gear and the worm can be self-locked.

[0022] In an embodiment of the present application, the control handle further includes a locking device. The bending member has a connecting shaft, and the bending member is connected to the input member through the connecting shaft. The locking device is disposed on the housing and can lock or unlock the bending member;

[0023] The locking device includes a locking wrench and a shaft clamp. The connecting shaft is located in the shaft clamp, and the locking wrench controls the shaft clamp to clamp or release the connecting shaft.

[0024] In an embodiment of the present application, the input member is a connecting rod, the output member is a slider, the slider is slidably disposed on the housing, one end of the connecting rod is connected to the slider, the other end is connected to the bending member, and the traction wire is connected to the slider and moves with the slider.

[0025] In an embodiment of the present application, the control handle further includes a locking device. The locking device is disposed on the housing and is connected to the connecting rod;

[0026] The locking device includes a direct-acting damper.

[0027] An intervention system includes a guide wire as described in any of the above technical features and a control handle as described in any of the above technical features. The control handle is connected to the distal end of the guide wire to control the bending of the distal end of the guide wire.

[0028] After adopting the above technical solution, the present application has at least the following technical effects:

[0029] For the guide wire, control handle and intervention system of the present application, in the guide wire, the core wire is axially fixed to the elastic tube, the traction wire is axially fixed in the elastic tube, the proximal end of the traction wire is connected to the control handle, the distal end of the traction wire is connected to the distal end of the core wire, and the coating layer is coated on the outside of the elastic tube, core wire and traction wire to form a guide wire. When the operator operates the control handle, the control handle can drive the traction wire to move synchronously. Furthermore, the traction wire can drive the distal end of the core wire to bend through the elastic tube, so that the distal end of the core wire can enter the curved channel.

[0030] The guide wire uses an elastic tube in cooperation with a traction wire to achieve the bending control of the distal end of the guide wire. The core wire and the traction wire are axially fixed to the elastic tube, and after a coating layer is provided on the outside, a guide wire is formed. During the operation, the operator can directly operate the control handle to control the traction wire to drive the distal end of the guide wire to bend, so that the distal end of the guide wire can be directly bent to the direction where the curved channel is located, realizing the controllable bending of the distal end of the guide wire, without repeatedly adjusting the orientation of the guide wire, reducing the operation difficulty, shortening the operation time, improving the operation efficiency, and reducing the physical consumption of the operator. Moreover, the coating layer is the outermost layer of the guide wire, which can facilitate the movement of the guide wire in the channel and avoid scratching the channel. Description of the Drawings

[0031] Figure 1 Schematic diagram of the connection between the guide wire and the control handle according to an embodiment of the present application.

[0032] Figure 2 is Figure 1 Cross-sectional view of the first embodiment of the distal end of the guide wire shown.

[0033] Figure 3 is Figure 1 Cross-sectional view of the second embodiment of the distal end of the guide wire shown.

[0034] Figure 4 is Figure 1 Cross-sectional view of the third embodiment of the distal end of the guide wire shown.

[0035] Figure 5 is Figure 2 Schematic diagram of one embodiment of the elastic tube in the guide wire shown.

[0036] Figure 6 is Figure 2 Schematic diagram of another embodiment of the elastic tube in the guide wire shown.

[0037] Figure 7 is Figure 2 Schematic diagram of yet another embodiment of the elastic tube in the guide wire shown.

[0038] Figure 8 is Figure 2 Schematic diagram of the guide wire with two traction wires shown.

[0039] Figure 9 is Figure 1 Schematic diagram of the relationship between the bending angle of the distal end of the guide wire and the moving distance of the traction wire shown.

[0040] Figure 10 is Figure 9 Digital model diagram of the relationship between the bending angle of the distal end of the guide wire and the moving distance of the traction wire shown.

[0041] Figure 11 is Figure 1 Schematic diagram of the first embodiment of the control handle shown.

[0042] Figure 12 is Figure 11 Schematic diagram of the layout of two traction wires in the control handle shown.

[0043] Figure 13 is Figure 1 Schematic diagram of the second embodiment of the control handle shown.

[0044] Figure 14 is Figure 13 Schematic diagram of the locking device in the control handle shown.

[0045] Figure 15 For Figure 1 the schematic diagram of the third embodiment of the control handle shown.

[0046] Figure 16 For Figure 15 the schematic diagram of the deformation of the locking device in the control handle shown.

[0047] Figure 17 For Figure 1 the schematic diagram of the fourth embodiment of the control handle shown. Specific Embodiments

[0048] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe in detail the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0049] Refer to Figure 1 , the present application provides a guide wire 100. The guide wire 100 is applied to an interventional system and is connected to a control handle 200 in the interventional system. The distal end of the guide wire 100 is bent by controlling the control handle 200. After the distal end of the guide wire 100 is bent, it can extend into a bifurcated channel or a channel with a tricky angle, etc., to align with the lesion location for facilitating subsequent surgical operations. For ease of description, the bifurcated channel or the channel with a tricky angle, etc. is referred to as a curved channel.

[0050] It can be understood that generally the head end of a medical guide wire lacks degrees of freedom and cannot perform real-time controllable steering of the head end of the guide wire according to the needs during the operation. The doctor can only bend its head by means of pre-shaping outside the body and then continuously rotate the guide wire to complete the circumferential direction selection. However, this operation method often requires multiple attempts, which greatly extends and consumes the operation time and the doctor's physical strength. For this reason, the present application provides a new type of guide wire 100, which can achieve controllable bending of the distal end, enter the curved channel without repeatedly adjusting the orientation of the guide wire 100, shorten the operation time, improve the operation efficiency, and reduce the physical consumption of the operator. The following introduces the specific structure of the guide wire 100 in an embodiment.

[0051] Refer to Figures 1 to 4, in one embodiment, the guide wire 100 includes an elastic tube 110, a core wire 120, a traction wire 130, and a coating layer 140. The core wire 120 is axially fixed to the elastic tube 110 along the axis of the elastic tube 110. The traction wire 130 is axially fixed in the elastic tube 110 along the axis of the elastic tube 110, and the distal end of the traction wire 130 is connected to the distal end of the core wire 120. The proximal end of the traction wire 130 extends out of the elastic tube 110. Pulling the proximal end of the traction wire 130 causes the distal ends of the core wire 120 and the spring tube 110 to turn and bend, thereby causing the distal end of the guide wire 100 to bend. The coating layer 140 covers the elastic tube 110, the traction wire 130, and the core wire 120.

[0052] It can be understood that the proximal end refers to the end of the guide wire 100 that is close to the operator and connected to the control handle 200, and the distal end refers to the end of the guide wire 100 that is far from the operator and extends into the patient's body. The guide wire 100 extends from the proximal end to the distal end. The proximal end of the guide wire 100 is connected to the control handle 200, and the distal end of the guide wire 100 extends into the patient's body. The control handle 200 can control the bending of the distal end of the guide wire 100 to extend into the curved cavity. It should be noted that the proximal end and the distal end are also applicable to other components in the guide wire 100, and will not be elaborated hereinafter. Optionally, the distal end of the guide wire 100 is plastically formed into a round head. This can prevent the distal end of the guide wire 100 from piercing the cavity.

[0053] The elastic tube 110 is the framework of the guide wire 100. The elastic tube 110 is hollow and extends from the proximal end to the distal end. The traction wire 130 is axially disposed in the hollow cavity of the elastic tube 110, and the distal end of the traction wire 130 is fixedly connected to the distal end of the elastic tube 110. The hollow cavity of the elastic tube 110 can provide a channel or attachment for the traction wire 130. At the same time, when the traction wire 130 is pulled, the distal end of the guide wire 100 bends, driving the elastic tube 110 to deform and bend.

[0054] The core wire 120 is axially fixed to the elastic tube 110. The elastic tube 110 can enhance the elasticity of the core wire 120 so that the distal end of the core wire 120 can bend. At the same time, the core wire 120 can enhance the rigidity of the elastic tube 110 and improve the overall support and torsional control of the guide wire 100. The traction wire 130 is the power wire for controlling the bending of the distal end of the guide wire 100. The proximal end of the traction wire 130 is connected to the control handle 200, and the distal end of the traction wire 130 is connected to the core wire 120. Loosening or tightening the traction wire 130 by the control handle 200 can achieve the bending of the distal end of the core wire 120.

[0055] Both the core wire 120 and the traction wire 130 are fixed in the hollow cavity of the elastic tube 110 to form an assembly. The coating layer 140 is provided on the outside of the assembly to form the guide wire 100. That is to say, the coating layer 140 is the outermost layer of the guide wire 100. By means of the coating layer 140, the external structural form of the guide wire 100 is improved, which is convenient for the guide wire 100 to move in the cavity and prevents the guide wire 100 from scratching the cavity.

[0056] During the operation, the guide wire 100 and the catheter cooperate to move in the lumen. The distal end of the guide wire 100 is straightened. When the distal end of the guide wire 100 encounters a curved lumen, the operator operates the control handle 200 to make the control handle 200 pull the traction wire 130, that is, the traction wire 130 moves proximally. At this time, the traction wire 130 can pull the elastic tube 110 and the core wire 120 to bend, so as to realize the bending of the distal end of the guide wire 100. Moreover, different acting forces can be applied to the traction wire 130 through the control handle 200, so that the distal end of the guide wire 100 has different bending angles, so that the distal end of the guide wire 100 can extend into different types of curved blood vessels, and the bending of the distal end of the guide wire 100 can be controlled.

[0057] For the guide wire 100 in the above embodiment, the elastic tube 110 is used in cooperation with the traction wire 130 to realize the bending control of the distal end of the guide wire 100. The core wire 120 and the traction wire 130 are axially fixed to the elastic tube 110, and after the coating layer 140 is arranged on the outside, the guide wire 100 is formed. During the operation, the operator can directly operate the control handle 200 to control the traction wire 130 to drive the distal end of the guide wire 100 to bend, so that the distal end of the guide wire 100 can be directly bent to the direction where the curved lumen is located, realizing the controllable bending of the distal end of the guide wire 100, without repeatedly adjusting the orientation of the guide wire 100, shortening the operation time, improving the operation efficiency, and reducing the physical consumption of the operator. Moreover, the coating layer 140 is the outermost layer of the guide wire 100, which can facilitate the movement of the guide wire 100 in the lumen and avoid scratching the lumen.

[0058] In one embodiment, the core wire 120 is made of materials with high tensile strength such as 304V medical stainless steel wire and memory nickel-titanium alloy wire, and the traction wire 130 is made of materials such as 304V medical stainless steel wire and memory nickel-titanium alloy wire. In this way, the structural strength of the core wire 120 and the traction wire 130 can be ensured, and it is ensured that the traction wire 130 can drive the core wire 120 to bend. Optionally, the core wire 120 and the traction wire 130 can be round wires or flat wires. Optionally, the traction wire 130 can be a single wire or a multi-strand wire braided into one strand to increase the tensile strength of the traction wire 130. Optionally, the elastic tube 110 is a spring tube. Of course, in other embodiments of the present application, the elastic tube 110 can also be a corrugated tube or other tubes with elastic properties. Optionally, the spring tube is a combination of one or more of a dense spring tube, a variable diameter spring tube, and a variable pitch spring tube. Optionally, the elastic tube 110 is made of 304V stainless steel round wire, and the wire diameter of different round wires is selected according to the type and size of the guide wire 100.

[0059] Optionally, the traction wire 130, the core wire 120, and the elastic tube 110 are connected and fixed by welding or gluing. Exemplarily, the traction wire 130 is fixed to the inner wall of the elastic tube 110 by welding, the core wire 120 is fixed to the elastic tube 110 by welding, and the distal end of the traction wire 130 is fixed to the distal end of the core wire 120 by welding. In the following text, only the case where the traction wire 130, the core wire 120, and the elastic tube 110 are connected by welding is taken as an example for illustration.

[0060] See Figure 4 , in one embodiment, the core wire 120 is fixed to the outer wall of the elastic tube 110, the distal end of the core wire 120 is connected to the distal end of the traction wire 130, the traction wire 130 is disposed in the hollow cavity of the elastic tube 110, and the distal end of the traction wire 130 extends out of the elastic tube 110 and is fixedly connected to the distal end of the core wire 120. Preferably, the distal end of the elastic tube 110 and the distal end of the traction wire 130 can be fixedly connected or non-fixedly connected. In this way, the traction wire 130 can drive the elastic tube 110 and the core wire 120 to bend, thereby realizing the bending control of the distal end of the guide wire 100.

[0061] See Figure 2 , optionally, the distal end of the core wire 120 and the distal end of the traction wire 130 are flush with the distal end of the elastic tube 110, and the distal end of the core wire 120 is connected to the distal end of the traction wire 130 at the distal end of the elastic tube 110. Optionally, see Figure 3 and Figure 4 , the distal end of the core wire 120 and the distal end of the elastic tube 110 protrude from the distal end of the elastic tube 110, the distal end of the core wire 120 can further extend out of the elastic tube 110, and the distal end of the traction wire 130 extends out of the elastic tube 110 and is connected to the distal end of the core wire 120. At the same time, the proximal end of the core wire 120 is flush with the proximal end of the elastic tube 110. In this way, the core wire 120 is used to stably support the proximal end of the elastic tube 110 at the proximal end, avoiding unexpected bending of the proximal end of the elastic tube 110. For example, avoiding the elastic tube 110 from bending when turning due to insufficient supporting force.

[0062] See Figures 2 to 4 , in one embodiment, the core wire 120 includes a first wire segment 121 and a second wire segment 122. The proximal end of the first wire segment 121 is fixed to the elastic tube 110, the distal end is connected to the proximal end of the second wire segment 122, and the distal end of the second wire segment 122 is connected to the distal end of the traction wire 130. The diameter dimension of the second wire segment 122 gradually decreases from the proximal end to the distal end. That is to say, in the direction from the proximal end to the distal end, the diameter dimension of the second wire segment 122 gradually decreases. When the longitudinal section of the second wire segment 122 is non-circular, the diameter dimension refers to the outer diameter of the circumscribed circle of the second wire segment 122.

[0063] The proximal end of the first wire segment 121 is fixed to the proximal end of the elastic tube 110, the distal end of the first wire segment 121 is connected to the proximal end of the second wire segment 122, and the distal end of the second wire segment 122 is connected to the distal end of the traction wire 130. The first wire segment 121 is a constant-diameter segment, the second wire segment 122 is a variable-diameter segment, and the first wire segment 121 and the second wire segment 122 form a variable-diameter core wire 120. Moreover, the variable-diameter segment is located at the distal end of the core wire 120, which can make the distal end of the core wire 120 softer. After the traction wire 130 is tensioned, the distal end of the core wire 120 can be bent more easily. Optionally, the first wire segment 121 and the second wire segment 122 are of an integral structure.

[0064] See Figure 2 , Figure 3 and Figure 5 , in one embodiment, the elastic tube 110 is a constant-diameter tube. That is to say, the diameter dimension of the elastic tube 110 is the same from the proximal end to the distal end. Exemplarily, the elastic tube 110 is a spring tube, and the elastic tube 110 is a tube segment wound closely with equal pitch and equal diameter. In this way, the elastic tube 110 can maintain good support when pushing the guide wire 100 forward.

[0065] See Figure 4 , Figure 6 and Figure 7 , in another embodiment, the elastic tube 110 includes a first tube segment 111 and a second tube segment 112. The distal end of the first tube segment 111 is connected to the proximal end of the second tube segment 112. The diameter of the second tube segment 112 gradually decreases from the proximal end to the distal end, and / or when the second tube segment 112 is a spring tube, the pitch of the second tube segment 112 gradually increases from the proximal end to the distal end.

[0066] The proximal end of the first tube segment 111 is connected to the proximal end of the core wire 120, the distal end of the first tube segment 111 is connected to the proximal end of the second tube segment 112, and the distal end of the second tube segment 112 is connected to the core wire 120. The first tube segment 111 and the second tube segment 112 are connected to form the elastic tube 110. Optionally, both the first tube segment 111 and the second tube segment 112 are spring tubes. The first tube segment 111 is a constant-diameter tube, and the second tube segment 112 is a variable-diameter and / or variable-pitch tube. After the first tube segment 111 and the second tube segment 112 are connected, a variable-diameter elastic tube 110 is formed to meet different delivery requirements of the guide wire 100.

[0067] See Figure 6 , in another embodiment, the first tube segment 111 is a tube segment wound closely with equal pitch and equal diameter. The close winding setting can ensure that the guide wire 100 has good support. The second tube segment 112 is wound thickly with a larger pitch, that is, the pitch of the second tube segment 112 is greater than that of the first tube segment 111, and the second tube segment 112 is a variable-pitch tube segment. In this way, a larger bending deformation space can be provided at the distal end of the elastic tube 110, and it is easy to deform under the pulling of the traction wire 130.

[0068] As Figure 7 shown, in yet another embodiment, the first pipe section 111 is a pipe section closely wound with equal pitch and equal diameter. The close winding can ensure that the guide wire 100 has good supportability. The second pipe section 112 is wound with a larger pitch, and the diameter dimension of the second pipe section 112 gradually decreases from the proximal end to the distal end, that is, the pitch of the second pipe section 112 is greater than the pitch of the first pipe section 111, the diameter of the second pipe section 112 is greater than the diameter of the first pipe section 111, and the second pipe section 112 is a pipe section with variable pitch and variable diameter. In this way, the distal end of the elastic tube 110 can be made softer and more easily deformed under the pulling of the traction wire 130.

[0069] See Figure 2 , in the first embodiment, the elastic tube 110 is a pipe section with equal diameter. The core wire 120 is arranged on the inner wall of the elastic tube 110. The distal end of the core wire 120 is flush with the distal end of the elastic tube 110, the proximal end of the core wire 120 is flush with the proximal end of the elastic tube 110, the distal end of the traction wire 130 is flush with the distal end of the elastic tube 110 and is connected to the distal end of the core wire 120. The core wire 120 is located in the elastic tube 110. The axial length of the core wire 120 is substantially the same as the axial length of the elastic tube 110. The two ends of the core wire 120 are welded to the two ends of the elastic tube 110, and the distal end of the core wire 120 is also welded to the two ends of the traction wire 130. After the traction wire 130 is pulled, it can move in the elastic tube 110, and then the distal end of the elastic tube 110 is bent and deformed, realizing the bending of the distal end of the guide wire 100.

[0070] See Figure 3 , in the second embodiment, the elastic tube 110 is a pipe section with equal diameter. The core wire 120 is arranged on the inner wall of the elastic tube 110. The distal end of the core wire 120 extends out of the distal end of the elastic tube 110, the proximal end of the core wire 120 is flush with the proximal end of the elastic tube 110, the distal end of the traction wire 130 is flush with the distal end of the elastic tube 110 and is connected to the distal end of the core wire 120. The core wire 120 is located in the elastic tube 110. The axial length of the core wire 120 is longer than the axial length of the elastic tube 110. The positions where the two ends of the elastic tube 110 contact the core wire 120 are welded. The distal end of the traction wire 130 extends out of the distal end of the elastic tube 110 and is welded to the distal end of the core wire 120. After the traction wire 130 is pulled, the core wire 120 exposed at the distal end of the elastic tube 110 is bent. In this way, the distal end of the guide wire 100 bends depending on the deformed core wire 120.

[0071] See Figure 4, in the third embodiment, the first pipe section 111 is a pipe section wound closely with equal pitch and equal diameter, the second pipe section 112 is a pipe section with variable pitch and variable diameter, the core wire 120 is arranged on the outer wall of the elastic pipe 110, the distal end of the core wire 120 extends out of the distal end of the elastic pipe 110, the proximal end of the core wire 120 is flush with the proximal end of the elastic pipe 110, the distal end of the traction wire 130 is flush with the distal end of the elastic pipe 110 and is connected to the distal end of the core wire 120. The core wire 120 is located in the elastic pipe 110, the axial length of the core wire 120 is slightly longer than the axial length of the elastic pipe 110, and the core wire 120 is welded to both ends and the middle position of the elastic pipe 110 to increase the support of the elastic pipe 110 for the core wire 120. After the distal end of the core wire 120 exposes the distal end of the elastic pipe 110, it can drive the distal end of the elastic pipe 110 to bend through its own bending deformation. The distal end of the traction wire 130 extends out of the distal end of the elastic pipe 110 and is welded to the distal end of the core wire 120. After the traction wire 130 is tensioned, the traction wire 130 drives the elastic pipe 110 to bend through the core wire 120, realizing the bending control of the distal end of the guide wire 100.

[0072] Certainly, in other embodiments of the present application, the first pipe section 111 is a pipe section wound closely with equal pitch and equal diameter, the second pipe section 112 is a pipe with variable diameter, or the elastic pipe 110 is arranged in other types. It should be noted that the setting forms of the elastic pipe 110 and the core wire 120 and the embodiments of the core wire 120 inside and outside the elastic pipe 110 can be used in any combination to meet different usage requirements, which will not be elaborated here. Moreover, only the example of the core wire 120 arranged in the elastic pipe 110 will be described hereinafter.

[0073] Optionally, the guide wire 100 further includes a developing component, and the developing component is arranged at the distal end of the elastic pipe 110. Under the X-ray irradiation of the X-ray machine, the developing component can display the position of the guide wire 100 in the cavity, facilitating the positioning of the guide wire 100, and further enabling the guide wire 100 to accurately move to the lesion site. Optionally, the developing component is arranged in a ring shape, a sheet shape and other structural forms. Optionally, the developing component is made of developing materials such as platinum-iridium and tantalum.

[0074] See Figures 2 to 4 , Figure 8, in one embodiment, the traction wire 130 is at least one. When there are multiple traction wires 130, the multiple traction wires 130 are spaced apart on the inner wall of the elastic tube 110. When one of the traction wires 130 moves proximally, at least some of the remaining traction wires 130 move distally. The proximal end of at least one traction wire 130 is connected to the control handle 200, and the distal end of at least one traction wire 130 is connected to the distal end of the core wire 120. After being tensioned, the traction wire 130 can drive the distal end of the core wire 120 to bend, thereby realizing the bending control of the distal end of the guide wire 100. At least one traction wire 130 can enable the core wire 120 to have at least one degree of bending freedom in one direction, and multiple traction wires 130 can enable the core wire 120 to have multiple degrees of bending freedom in multiple directions, so that the guide wire 100 can bend in multiple directions.

[0075] See Figures 2 to 4 , the number of the traction wires 130 is one. The proximal end of the traction wire 130 is connected to the transmission device 230 (mentioned later) of the control handle 200, and the distal end is connected to the core wire 120. The traction wire 130 is also connected to the elastic tube 110. After being tensioned, the traction wire 130 can drive the elastic tube 110 and the core wire 120 to bend.

[0076] See Figure 8 , the number of the traction wires 130 is two, namely the first traction wire and the second traction wire. The first traction wire and the second traction wire are connected to the transmission device 230 of the control handle 200. The distal ends of the first traction wire and the second traction wire are connected to the core wire 120. The first traction wire and the second traction wire are also connected to the elastic tube 110. The first traction wire and the second traction wire are spaced apart on the outer periphery of the core wire 120. When the first traction wire is tensioned, the second traction wire is relaxed, and the first traction wire can drive the core wire 120 to bend in one direction. When the second traction wire is tensioned, the first traction wire is relaxed, and the second traction wire drives the core wire 120 to bend in the other direction.

[0077] The design that one of the first traction wire and the second traction wire is tensioned and the other is relaxed is realized by the transmission device 230. The specific structure of the transmission device 230 is mentioned later and will not be elaborated here. It should be noted that when the number of the traction wires 130 is multiple, that is, the number of the first traction wires is at least one, and the number of the second traction wires is at least one. When the number of the traction wires 130 is more than three, multiple transmission devices 230 can be set to drive the corresponding traction wires 130 to move respectively. Moreover, multiple traction wires 130 can enable the core wire 120 to bend in different directions to meet different usage requirements. Optionally, the multiple traction wires 130 are uniformly arranged in the elastic tube 110 in the circumferential direction. In this way, the core wire 120 and the elastic tube 110 can be evenly stressed.

[0078] See Figures 1 to 4, the coating layer 140 is located on the outermost layer of the guide wire 100, that is, the coating layer 140 integrally coats the elastic tube 110 and the core wire 120. The coating layer 140 is coated on the outer wall of the elastic tube 110 by means of coating or wrapping. In one embodiment, the coating layer 140 is made of a biocompatible polymer to avoid puncturing the canal. Optionally, the coating layer 140 is made of a biocompatible material such as polyurethane or polyethylene. Optionally, a hydrophilic coating is applied to the outer side of the coating layer 140.

[0079] See Figures 1 to 4 , in one embodiment, the coating layer 140 includes a first coating section, a second coating section, and a third coating section. The first coating section coats the proximal end of the elastic tube 110, the third coating section coats the distal end of the elastic tube 110, and the second coating section connects the first coating section and the third coating section. The hardness of the second coating section is less than the hardness of the first coating section and greater than the hardness of the third coating section.

[0080] The first coating section, the second coating section, and the third coating section are connected in sequence from the proximal end to the distal end to form the coating layer 140. The hardness of the first coating section is greater than the hardness of the second coating section, and the hardness of the second coating section is greater than the hardness of the third coating section. In this way, the coating layer 140 can have different hardnesses from the proximal end to the distal end, and further the guide wire 100 can have different hardnesses from the proximal end to the distal end, that is, the distal end of the guide wire 100 is soft and the proximal end is hard, so as to facilitate the bending of the distal end of the guide wire 100. Optionally, the first coating section, the second coating section, and the third coating section are composed of multiple segments of materials with different hardnesses thermally fused and spliced, so that the hardness of the guide wire 100 becomes harder from the distal end to the proximal end.

[0081] To better illustrate the bending of the distal end of the guide wire 100, the calculation of the bending angle of the distal end of the guide wire 100 is introduced here. As Figure 9 shown, the solid line shown in the figure is the state before bending, and the dotted line is the state after being tightened by the traction wire 130. The distal ends of the traction wire 130 and the core wire 120 extend out of the distal end of the elastic tube 110, and the core wire 120 is located outside the elastic tube 110.

[0082] Figure 9 where θ is the bending angle of the elastic tube 110, d is the moving distance of the traction wire 130, and it is also the displacement of the distal end of the guide wire 100 in the axial direction of the guide wire 100 after bending, as Figure 9 shown as d in the figure. The elastic tube 110 has a bending radius when bending Figure 9In the figure, the bending radius of the traction wire 130 is R. The outer circle formed by the bending of the traction wire 130 is the first circle, and the outer circle formed by the bending of the elastic tube 110 is the second circle. The horizontal line where the center of the bending radius of the elastic tube 110 is located intersects the elastic tube 110 in the vertical state at the bending center point of the elastic tube 110. The bending radius r of the elastic tube 110 with different structures is different, and the bending center point is also different. The specific parameters of r and R can be measured by bending the elastic tube 110 with a specific structural form by 90°. Then, according to trigonometric functions and similar triangles, when the traction wire 130 moves a distance d, the bending angle θ of the guide wire 100 can be obtained.

[0083] As Figure 9 and Figure 10 shown, for the bending angle of the distal end of the required guide wire 100, according to trigonometric functions:

[0084]

[0085] Among them, , as described on the previous page, R can be measured, d is the moving distance of the traction wire 130, and only s needs to be obtained. According to trigonometric functions,

[0086] According to similar triangles, ,

[0087] Therefore, by combining the above equations, ,

[0088] According to the Pythagorean theorem, ,

[0089] According to trigonometric functions, ,

[0090] Among them, , , ,

[0091] It can be obtained that: ,

[0092] Combining the above equations, it can be obtained that:

[0093] .

[0094] In the above formula, only θ is unknown and the other parameters are known. Therefore, the bending angle θ of the distal end of the guide wire 100 can be obtained. That is to say, when parameters such as the moving distance d of the traction wire 130, the bending radius r of the elastic tube 110, and the bending radius R of the traction wire 130 are determined, the bending angle θ of the distal end of the guide wire 100 can be determined. Correspondingly, the bending angle of the bending channel is adapted to the bending angle θ of the distal end of the guide wire 100. According to the bending angle of the bending strength, the bending angle θ of the distal end of the guide wire 100 can be roughly determined. After the bending angle θ of the distal end of the guide wire 100 is determined, the moving distance d of the traction wire 130 can be deduced backward according to the above formula. The operator can tighten the traction wire 130 to move the above distance so that the bending angle θ of the distal end of the guide wire 100 is adapted to the bending angle of the bending channel.

[0095] In this way, the bending angle θ of the distal end of the guide wire 100 can be obtained according to the bending angle of the bending channel. Furthermore, the moving distance of the traction wire 130 can be calculated according to the bending angle θ of the distal end of the guide wire 100, so that the moving distance of the control bending member 220 (mentioned later) can be determined, so that the bending angle θ of the distal end of the guide wire 100 is adapted to the bending angle of the bending channel, which is convenient for the distal end of the guide wire 100 to enter the bending channel. Optionally, the intervention system further includes a surgical robot, and the surgical robot is connected to the control handle 200 to control the movement of the guide wire 100. In this way, the surgical robot can control the bending angle of the distal end of the guide wire 100 by operating the control handle 200 according to the above design to achieve precise control.

[0096] For the guide wire 100 of the present application, the elastic tube 110 is used in cooperation with the traction wire 130 to realize the bending control of the distal end of the guide wire 100. The core wire 120 and the traction wire 130 are axially fixed to the elastic tube 110, and after the coating layer 140 is arranged on the outside, the guide wire 100 is formed. During the operation, the operator can directly operate the control handle 200 to control the traction wire 130 to drive the distal end of the guide wire 100 to bend, so that the distal end of the guide wire 100 is directly bent to the direction where the bending channel is located, realizing the controllable bending of the distal end of the guide wire 100, without repeatedly adjusting the orientation of the guide wire 100, shortening the operation time, improving the operation efficiency, and reducing the physical consumption of the operator. Moreover, the coating layer 140 is the outermost layer of the guide wire 100, which can facilitate the movement of the guide wire 100 in the channel and avoid scratching the channel.

[0097] See Figure 1, the present application also provides a control handle 200. The control handle 200 cooperates with the guide wire 100 in any of the above embodiments. The control handle 200 includes a housing 210, a bending adjustment member 220, and a transmission device 230. The transmission device 230 is disposed in the housing 210. The bending adjustment member 220 is located outside the housing 210, and one end thereof passes through the housing 210 and is connected to the transmission device 230. The proximal end of the traction wire 130 of the guide wire 100 is connected to the transmission device 230. The bending adjustment member 220 controls the transmission device 230 to drive the guide wire 100 to move proximally, so as to make the distal end of the guide wire 100...

[0098] The control handle 200 is disposed at the proximal end of the guide wire 100. The control handle 200 is connected to the traction wire 130 in the guide wire 100, so that the traction wire 130 is tightened or relaxed, realizing the bending control of the distal end of the guide wire 100. When the distal end of the guide wire 100 enters the bending channel, the control handle 200 controls the traction wire 130 to be tightened to drive the guide wire 100 to bend in the direction in which the traction wire 130 is tightened. The bending adjustment member 220 is located outside the housing 210. The bending adjustment member 220 extends into the housing 210 and is connected to the transmission device 230. The proximal end of the traction wire 130 extends into the housing 210 and is connected to the transmission device 230. When the operator operates the bending adjustment member 220, the bending adjustment member 220 can drive the transmission device 230 to move, and then the transmission device 230 can drive the traction wire 130 to move, so that the traction wire 130 is tightened or relaxed.

[0099] Moreover, when the operator operates the bending adjustment member 220 to move to different positions, the bending adjustment member 220 will drive the transmission device 230 to apply different magnitudes of force to the traction wire 130, so that the distal end of the guide wire 100 has different bending angles. In this way, the operator can control the bending of the distal end of the guide wire 100 according to the angle of the bending channel, making it easier for the guide wire 100 to enter the bending channel. Optionally, the bending adjustment member 220 can be manually controlled by the operator. Of course, in other embodiments of the present application, the bending adjustment member 220 can also be connected to a motor of a surgical robot, and the distal end bending of the guide wire 100 is automatically controlled by the motor.

[0100] When there is one traction wire 130, the proximal end of one traction wire 130 is connected to the transmission device 230. When the bending adjustment member 220 controls the movement of the transmission device 230, the traction wire 130 can be tightened or relaxed. When the traction wire 130 is tightened, the distal end of the guide wire 100 can be controlled to bend. When there are two traction wires 130, the two traction wires 130 are the first traction wire and the second traction wire. The first traction wire and the second traction wire are arranged at intervals on the outer periphery of the core wire 120. The proximal ends of the first traction wire and the second traction wire are connected to the transmission device 230. The bending adjustment member 220 controls the transmission device 230 to drive one of the first traction wire and the second traction wire to be tightened and the other to be relaxed, so as to realize the bending control of the distal end of the guide wire 100.

[0101] It should be noted that the layout of the first traction wire and the second traction wire is essentially the same, except that their movement directions are opposite. In the following text, the first traction wire and the second traction wire will not be distinguished, and only two traction wires 130 will be used as a substitute. Moreover, when using two traction wires 130 to control the distal bending of the guide wire 100, it can effectively prevent problems such as elastic failure at the distal end of the elastic tube 110 under the action of one traction wire 130, resulting in inability to reset, so that the distal end of the guide wire 100 can be straightened to meet the use requirements.

[0102] When there are more traction wires 130, corresponding transmission devices 230 are provided to match the traction wires 130. Exemplarily, when there are three traction wires 130, the three traction wires 130 are arranged at intervals on the outer periphery of the core wire 120. One transmission device 230 is provided to connect two traction wires 130, and one transmission device 230 is provided to connect the remaining one traction wire 130. When there are four traction wires 130, the four traction wires 130 are arranged at intervals on the outer periphery of the core wire 120. Two transmission devices 230 are provided, and each transmission device 230 connects two guide wires 100, and each transmission device 230 is arranged through a corresponding bending adjustment member 220. Of course, in other embodiments of the present application, when there are more traction wires 130, the odd-numbered traction wires 130 are arranged according to the arrangement principle of three traction wires 130, and the even-numbered traction wires 130 are arranged according to the arrangement principle of four traction wires 130. In the following text, only one or two traction wires 130 will be taken as examples for illustration, and the cases where the number of traction wires 130 is other will not be elaborated here.

[0103] The control handle 200 of the above embodiment drives the transmission device 230 through the bending adjustment member 220 to drive the traction wire 130 to move, so that the traction wire 130 drives the distal end of the core wire 120 to bend, thereby realizing the bending of the distal end of the guide wire 100. Moreover, operating the bending adjustment member 220 can control the bending angle of the distal end of the guide wire 100, so as to facilitate the distal end of the guide wire 100 to enter the curved channel. Optionally, the housing 210 includes an upper housing 215 and a lower housing 216. The upper housing 215 covers the lower housing 216 and encloses an installation space, and the transmission device 230 is arranged in the installation space. The arrangement of the upper housing 215 and the lower housing 216 can facilitate the installation of the transmission device 230, and at the same time, it can also play a protective role for the transmission device 230.

[0104] See Figure 1 、 Figures 11 to 17, in one embodiment, the transmission device 230 includes an input member and an output member that are meshed and connected. The input member is connected to the bending adjustment member 220, and the proximal end of the traction wire 130 is wound around the output member. The input member rotates to drive the output member to move, thereby driving the proximal end of the guide wire 100 to move, so as to control the bending of the distal end of the guide wire 100. The input member is the component that receives motion for the transmission device 230, and the output member is the component that outputs motion in the transmission device 230. The input member and the output member are in transmission connection. The input member is connected to the bending adjustment member 220, and the output member is connected to the proximal end of the traction wire 130. When controlling the movement of the bending adjustment member 220, the bending adjustment member 220 will drive the input member to move, and then the input member will drive the output member to move, so that the output member drives the traction wire 130 to move, controlling the tension or relaxation of the traction wire 130, so as to achieve the bending control or straightening control of the distal end of the guide wire 100.

[0105] When there is one traction wire 130, one traction wire 130 is arranged on the output member, and the output member directly drives the traction wire 130 to move, so that the traction wire 130 is tensioned or released. When the traction wire 130 is tensioned, the distal end of the guide wire 100 bends, and when the traction wire 130 is released, the distal end of the guide wire 100 is straightened. When the traction wire 130 is the first traction wire and the second traction wire, the first traction wire and the second traction wire are arranged in the transmission device 230 and move in the opposite direction along with the output member, so that one of the first traction wire and the second traction wire is tensioned and the other is relaxed, thereby achieving the bending control of the distal end of the guide wire 100. When the first traction wire and the second traction wire are released simultaneously, the distal end of the guide wire 100 is straightened.

[0106] The following introduces several structural forms of the input member and the output member in the transmission device 230. Other structural forms that can achieve the tension or relaxation of the traction wire 130 will not be elaborated.

[0107] See Figure 11 and Figure 12, in the first embodiment, the transmission device 230 includes a worm gear 231 and a worm 232. The worm gear 231 is in driving connection with the worm 232. The worm gear 231 is connected to the bending adjustment member 220. The traction wire 130 is wound around the worm 232 and is released or wound as the worm 232 rotates. In this embodiment, the bending adjustment member 220 is a bending adjustment knob, the input member is the worm gear 231, and the output member is the worm 232. The bending adjustment member 220 has a connecting shaft. The bending adjustment member 220 is connected to the worm gear 231 through the connecting shaft. The worm gear 231 is in meshing connection with the worm 232. The traction wire 130 is wound around the worm 232. By operating the bending adjustment member 220, the bending adjustment member 220 can drive the worm gear 231 to rotate, and then the worm gear 231 drives the worm 232 to rotate, so that the worm 232 winds or releases the traction wire 130. When the worm gear 231 winds the traction wire 130, it can tighten the traction wire 130, thereby realizing the bending control of the distal end of the guide wire 100. When the worm gear 231 releases the traction wire 130, it can loosen the traction wire 130. It should be noted that the bending adjustment member 220 can be disassembled to connect the transmission device 230 to a power source such as a motor for electric control to bend the guide wire 100, which will not be elaborated later.

[0108] When there is one traction wire 130, the traction wire 130 is wound around the worm 232 in any helix direction. When the bending adjustment member 220 is rotated, the bending adjustment member 220 can drive the worm gear 231 to drive the worm 232 to rotate, so that the worm 232 winds or releases the traction wire 130, realizing the bending control of the distal end of the guide wire 100. When two traction wires 130 are used to control the bending of the guide wire 100, the two traction wires 130 are wound around the screw 232 in opposite directions. When the screw 232 rotates, one traction wire 130 can be tightened and the other traction wire 130 can be relaxed synchronously. Optionally, the traction wire 130 is directly wound around one end of the worm 232. Of course, in other embodiments of the present application, the transmission device 230 further includes a wire wheel. The traction wire 130 is wound around the wire wheel, and the wire wheel is arranged at one end of the worm 232.

[0109] See Figure 12 , the helix angles of the worm gear 231 and the worm 232 are smaller than the corresponding friction angles, so that the worm gear 231 and the worm 232 can be self-locked. That is to say, setting the helix angles of the worm gear 231 and the worm 232 smaller than the friction angle can achieve self-locking. When the worm gear 231 stops rotating, the worm gear 231 and the worm 232 are self-locked with each other, so that the distal end of the guide wire 100 can be locked at any angle after bending.

[0110] See Figure 13, in the second embodiment, the transmission device 230 includes a gear 233 and a rack 234. The gear 233 is connected to the bending member 220, the rack 234 is meshed with the gear 233, and the traction wire 130 is connected to the rack 234 and moves along with the corresponding rack 234. In this embodiment, the bending member 220 is a bending knob, the input member is the gear 233, the output member is the worm 232. The bending member 220 has a connecting shaft, and the bending member 220 is connected to the gear 233 through the connecting shaft. The gear 233 is meshed with the rack 234, and the proximal end of the traction wire 130 is fixed to the rack 234. By operating the bending member 220, the bending member 220 can drive the gear 233 to rotate, and then the gear 233 drives the rack 234 to move, so as to tension or relax the traction wire 130. When the gear 233 drives the rack 234 to move proximally, the traction wire 130 can be tensioned, thereby realizing the bending control of the distal end of the guide wire 100. When the gear 233 drives the rack 234 to move distally, the traction wire 130 can be relaxed.

[0111] When there is one traction wire 130, the number of racks 234 is one, and the gear 233 directly drives the rack 234 to tension or relax the traction wire 130. When two traction wires 130 are used to control the bending of the guide wire 100, the number of racks 234 is two, and they are symmetrically arranged on both sides of the gear 233, and each traction wire 130 is fixed to a rack 234. That is to say, the gear 233 is arranged at the center of the two racks 234. When the gear 233 rotates, it can drive the two racks 234 to move synchronously. One of the racks 234 will move proximally, thereby tensioning the traction wire 130, and the other rack 234 will move distally, thereby releasing the traction wire 130.

[0112] Optionally, the rack 234 has a first sliding member 2341, and the housing 210 has a first mating member 211. When the rack 234 is installed in the housing 210, the first sliding member 2341 is slidably mated with the second sliding member 2361. In this way, the accurate movement track of the rack 234 in the housing 210 can be ensured. Optionally, the first sliding member 2341 and the first mating member 211 are a mating structure of a protrusion and a groove 2423. Optionally, the first sliding member 2341 and the first mating member 211 also have a wedge-shaped limiting portion, and the limiting of the rack 234 is realized through the wedge-shaped limiting portion to prevent the rack 234 from disengaging from the housing 210.

[0113] See Figure 13 and Figure 14, the control handle 200 further includes a locking device 240. The bending member 220 has a connecting shaft. The bending member 220 is connected to the gear 233 through the connecting shaft. The locking device 240 is disposed on the housing 210 and can lock or unlock the bending member 220. The locking device 240 is disposed on the outer side of the housing 210 and fixed to the housing 210. When the locking device locks the connecting shaft, the locking device 240 can clamp the connecting shaft. At this time, the connecting shaft cannot move relative to the housing 210, realizing the locking of the gear 233 and the rack 234, and enabling the distal end of the guide wire 100 to be locked at any angle after bending.

[0114] See Figure 13 and Figure 14 , the locking device 240 includes a locking wrench 241 and a shaft clamp 242. The connecting shaft is located in the shaft clamp 242. The locking wrench 241 controls the shaft clamp 242 to clamp or release the connecting shaft. The shaft clamp 242 is disposed on the housing 210, and the connecting shaft passes through the shaft clamp 242 and extends out. When the operator operates the locking wrench 241 to lock, the locking wrench 241 moves to press against the shaft clamp 242, causing the shaft clamp 242 to clamp the connecting shaft, realizing the locking of the connecting shaft. At this time, the connecting shaft cannot rotate, and further the gear 233 and the rack 234 are kept in a locked state. When unlocking, the locking wrench 241 moves away from the shaft clamp 242, causing the shaft clamp 242 to release the connecting shaft, thereby realizing the unlocking of the connecting shaft. At this time, the bending member 220 can drive the connecting shaft to rotate, thereby driving the gear 233 to rotate, realizing the bending control of the distal end of the guide wire 100.

[0115] See Figure 13 and Figure 14 , the shaft clamp 242 includes a clamping section 2422 and a connecting section 2421. The connecting section 2421 is disposed on the clamping section 2422. The clamping section 2422 has a receiving cavity for receiving the connecting shaft. The locking wrench 241 is connected to the connecting section 2421 and drives the clamping section 2422 to clamp or release the receiving cavity. The locking wrench 241 includes a cam wrench 2411 and a locking shaft 243. The locking shaft 243 is disposed on the connecting section 2421. The cam wrench 2411 is rotatably connected to the locking shaft 243. The cam wrench 2411 has a protruding portion 2412. When the cam wrench 2411 rotates relative to the locking shaft 243, the protruding portion 2412 can press against the connecting section 2421 or disengage from the connecting section 2421.

[0116] The clamping section 2422 is arranged in a ring shape. The clamping section 2422 has a notch. The connecting section 2421 is arranged at the notch of the clamping section 2422. There is a preset distance between the two connecting sections 2421, forming an opening. The locking wrench 241 connects the two connecting sections 2421. When locking, the locking wrench 241 presses one connecting section 2421 to approach the other connecting section 2421, so that the size of the opening is reduced, and then the clamping size of the clamping section 2422 is reduced to clamp the connecting shaft and achieve the locking of the connecting shaft. When unlocking, the locking wrench 241 disengages from the connecting section 2421. At this time, the two connecting sections 2421 reset, and the clamping section 2422 disengages from the connecting shaft to achieve the unlocking of the connecting shaft.

[0117] The locking shaft 243 is used to realize the rotatable connection between the cam wrench 2411 and the connecting section 2421. The side of the cam wrench 2411 facing the connecting section 2421 has a protruding portion 2412, and the protruding portion 2412 protrudes. When the cam wrench 2411 rotates, it can drive the protruding portion 2412 to rotate synchronously through the locking shaft 243. When the protruding portion 2412 aligns with the connecting section 2421, the protruding portion 2412 can press the connecting section 2421 to make the clamping section 2422 clamp the connecting shaft. When the protruding portion 2412 is away from the connecting section 2421, the protruding portion 2412 disengages from the connecting section 2421. At this time, the clamping section 2422 disengages from the connecting shaft.

[0118] Optionally, the inner wall of the clamping section 2422 also has a groove 2423, and the groove 2423 communicates with the accommodating cavity. When the locking wrench 241 presses the connecting section 2421, the connecting section 2421 can drive the clamping section 2422 to gradually clamp inward, which is convenient for the shaft clamp 242 to deform. In this embodiment, when the locking wrench 241 rotates, it drives the locking shaft 243 to press against or disengage from the opening of the shaft clamp 242, and then clamps or loosens the connecting shaft of the bending adjustment member 220 to achieve the locking of the traction wire 130. It should be noted that the contact surface between the locking wrench 241 and the shaft clamp 242 adopts an interference fit similar to a cam.

[0119] See Figure 15 and Figure 16, in the third embodiment, the transmission device 230 includes a screw 235 and a nut 236. The bending adjustment member 220 is provided at the proximal end of the screw 235. The screw 235 has a threaded portion, and the nut 236 is movably disposed on the threaded portion. The traction wire 130 is connected to the nut 236 and moves with the nut 236. In this embodiment, the bending adjustment member 220 is a bending adjustment knob, the input member is the screw 235, and the output member is the nut 236. The bending adjustment member 220 has a connecting shaft, and the bending adjustment member 220 is connected to the screw 235 through the connecting shaft. The nut 236 engages with the threaded portion to be disposed on the screw 235. The proximal end of the traction wire 130 is fixed to the nut 236. By operating the bending adjustment member 220, the bending adjustment member 220 can drive the screw 235 to rotate. When the screw 235 rotates, it can drive the nut 236 thereon to move, so that the nut 236 moves axially toward the proximal end or the distal end of the screw 235 to tighten or loosen the traction wire 130. When the screw 235 drives the nut 236 to move toward the proximal end, it can tighten the traction wire 130, thereby realizing the bending control of the distal end of the guide wire 100. When the screw 235 drives the nut 236 to move toward the distal end, it can loosen the traction wire 130.

[0120] When there is one traction wire 130, the number of nuts 236 is one, and the screw 235 directly drives the nut 236 to tighten or loosen the traction wire 130. When two traction wires 130 are used to control the bending of the guide wire 100, the number of nuts 236 is two, and the number of threaded portions is two, which are symmetrically arranged on the screw 235. The helix directions of the two threaded portions are opposite. The two nuts 236 are respectively disposed on the corresponding threaded portions, and each traction wire 130 is fixed to one nut 236. Due to the different thread helix directions of the two threaded portions, when the screw 235 rotates, it can drive the nut 236 to move through the corresponding helical portion, and the two nuts 236 move in opposite directions. One nut 236 will move toward the proximal end, thereby tightening the traction wire 130, and the other nut 236 will move toward the distal end, thereby releasing the traction wire 130.

[0121] See Figure 15 , the nut 236 has a second sliding member 2361, and the housing 210 has a second mating member 212. When the nut 236 is installed in the housing 210, the second sliding member 2361 and the second mating member 212 are in sliding fit. In this way, it can ensure that the trajectory of the nut 236 moving linearly in the housing 210 is accurate. Optionally, the second sliding member 2361 and the second mating member 212 are a mating structure of a protrusion and a groove 2423. Optionally, the housing 210 further has a wire passing channel 213, and the traction wire 130 is located in the wire passing channel 213 and can move in the wire passing channel 213.

[0122] See Figure 15, in one embodiment, the control handle 200 further includes a locking device 240. The bending member 220 has a connecting shaft, and the bending member 220 is connected to the gear 233 through the connecting shaft. The locking device 240 is disposed on the housing 210 and can lock or unlock the bending member 220. It should be noted that the structure and principle of this locking device 240 are substantially the same as those of the locking device 240 in the second embodiment, and will not be elaborated here.

[0123] See Figure 16 , in another embodiment, the locking device 240 includes a locking knob 244, and the locking knob 244 can pass through the housing 210 to abut against the screw 235. That is to say, the housing 210 has a through hole, and one end of the locking knob 244 can pass through the through hole and extend into the housing 210. When the traction wire 130 is adjusted in place and the screw 235 needs to be locked, the locking knob 244 is tightened, and the locking knobs 244 approach and abut against the screw 235, and the rotation of the screw 235 is restricted by the abutting method. Optionally, the locking knob 244 is a screw, and the through hole is a threaded hole. Optionally, the screw 235 has a multi-prismatic surface 2351. When the locking knob 244 is tightened, the end surface of the locking knob 244 can press against the prismatic surface of the screw 235 to lock the screw 235, and then lock the guide wire 100.

[0124] See Figure 17 , in the fourth embodiment, the transmission device 230 includes a slider 238 and a connecting rod 237. The slider 238 is slidably disposed on the housing 210. One end of the connecting rod 237 is connected to the slider 238, and the other end is connected to the bending member 220. The traction wire 130 is connected to the slider 238 and moves with the slider 238. In this embodiment, the bending member 220 is a pull knob, the input member is the connecting rod 237, the output member is the slider 238. One end of the connecting rod 237 is rotatably connected to the bending member 220, and the other end is rotatably connected to the slider 238. The slider 238 is slidably disposed in the housing 210, and the proximal end of the traction wire 130 is fixed to the slider 238. When the bending member 220 is pulled up or down, the bending member 220 can drive the connecting rod 237 to rise or fall, and then the connecting rod 237 can drive the slider 238 to move to tighten or loosen the traction wire 130. When the connecting rod 237 drives the slider 238 to move towards the proximal end, the traction wire 130 can be tightened, so as to realize the bending control of the distal end of the guide wire 100. When the connecting rod 237 drives the slider 238 to move towards the distal end, the traction wire 130 can be loosened.

[0125] When there is one traction wire 130, the number of racks 234 is one, and the connecting rod 237 directly drives the slider 238 to tighten or loosen the traction wire 130. When two traction wires 130 are used to control the bending of the guide wire 100, the number of connecting rods 237 and sliders 238 are both two. The two connecting rods 237 are symmetrically arranged and in an inverted V shape. One end of the two connecting rods 237 is rotatably connected, and the end of one of the connecting rods 237 is also rotatably connected to the bending adjustment member 220. The two ends of the two connecting rods 237 are respectively connected to the sliders 238. Each traction wire 130 is fixed to a slider 238, and the two sliders 238 and the traction wires 130 are arranged collinearly. When the bending adjustment member 220 is pulled up, the bending adjustment member 220 can drive the two connecting rods 237 to rise, so that the two connecting rods 237 drive the two sliders 238 to approach each other. At this time, the two sliders 238 drive one of the two traction wires 130 to tighten and the other to relax. When the bending adjustment member 220 is pressed down, the bending adjustment member 220 can drive the two connecting rods 237 to descend, so that the two connecting rods 237 drive the two sliders 238 to move away from each other. At this time, the two sliders 238 drive one of the two traction wires 130 to tighten and the other to relax.

[0126] Optionally, the housing 210 has a chute 214, and the slider 238 is slidably disposed in the chute 214. This can ensure the accurate movement track of the slider 238, and further ensure that the slider 238 can accurately drive the traction wire 130 to move. Optionally, the housing 210 also has an elongated hole to facilitate the connecting shaft of the bending adjustment member 220 to extend into the housing 210 to be connected to the connecting rod 237.

[0127] In an embodiment, the control handle 200 further includes a locking device. The locking device is disposed in the housing 210 and is connected to the connecting rod 237. The locking device is disposed in the housing 210. One end of the locking device is fixed to the housing 210, and the other end is connected to the connecting rod 237. When the locking device is unlocked, the connecting rod 237 can move up and down. When the locking device is locked, the connecting rod 237 is locked in the current position, and the distal end of the guide wire 100 can be locked at any angle after bending. Optionally, the locking device includes a direct-acting damper 245. The two sliders 238 are respectively hinged to one end of the two connecting rods 237, and the other end of the two connecting rods 237 is hinged to the direct-acting damper. The direct-acting damper is also fixedly connected to the bending adjustment member 220. By pulling or pressing the bending adjustment member 220, the two sliders 238 can move synchronously in opposite directions. The two sliders 238 are connected to the traction wire 130 to achieve synchronous control of one tightening and one loosening, so as to control the bending of the head end of the guide wire 100. The direct-acting damper 245 can keep the bending adjustment member 220 stably hovering at any position and will not move randomly due to its own gravity or slight external force interference.

[0128] The guide wire 100 and the control handle 200 of the present application. The guide wire 100 is the part inserted into the human body cavity. The distal end of the guide wire 100 needs to be shaped into a round head to prevent sharp puncture of the human body cavity. The control handle 200 is the part manipulated by the operator outside the body. It is connected to the proximal end of the guide wire 100, and the two are of an integrated structure. By rotating, pressing, pushing and pulling, etc., operating the bending member 220 can achieve the bending of the distal end of the guide wire 100. The control handle 200 can control the bending and steering of the distal end of the guide wire 100 through the cooperation of the bending member 220 and the transmission device 230, which is convenient for the distal end of the guide wire 100 to enter the curved cavity. Moreover, the cooperation between the bending member 220 and the transmission device 230 can also adjust the bending angle of the distal end of the guide wire 100 to achieve the control of the bending angle of the distal end of the guide wire 100.

[0129] See Figure 1 , the present application also provides an intervention system, including the guide wire 100 in any of the above embodiments and the control handle 200 in any of the above embodiments. The control handle 200 is connected to the distal end of the guide wire 100 to control the bending of the distal end of the guide wire 100. The intervention system of the present application uses the guide wire 100 in the above embodiment and the control handle 200 in the above embodiment for cooperation. The control handle 200 can control the bending and steering of the distal end of the guide wire 100 through the cooperation of the bending member 220 and the transmission device 230, which is convenient for the distal end of the guide wire 100 to enter the curved cavity. Moreover, the cooperation between the bending member 220 and the transmission device 230 can also adjust the bending angle of the distal end of the guide wire 100 to achieve the control of the bending angle of the distal end of the guide wire 100.

[0130] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0131] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A guide wire, characterized in that, Comprising: An elastic tube; A core wire, axially fixed to the elastic tube along the axis of the elastic tube; A traction wire, axially fixed to the elastic tube in the elastic tube, and the distal end of the traction wire is connected to the distal end of the core wire, the proximal end of the traction wire extends out of the elastic tube, pulling the traction wire causes the distal end of the guide wire to bend; And A coating layer, covering the elastic tube, the traction wire and the core wire.

2. The guide wire according to claim 1, characterized in that, The core wire is fixed to the inner wall or outer wall of the elastic tube; wherein, The distal ends of the core wire and the traction wire are respectively flush with or protrude from the distal end of the elastic tube; and / or The proximal end of the core wire is flush with the proximal end of the elastic tube.

3. The guide wire according to claim 1, characterized in that, The core wire includes a first wire segment and a second wire segment, the proximal end of the first wire segment is fixed to the elastic tube, the distal end is connected to the proximal end of the second wire segment, and the distal end of the second wire segment is connected to the distal end of the traction wire; The diameter of the second wire segment gradually decreases from the proximal end to the distal end.

4. The guide wire according to claim 1, characterized in that, The elastic tube is a tube with a constant diameter; Alternatively, the elastic tube includes a first tube segment and a second tube segment, the distal end of the first tube segment is connected to the proximal end of the second tube segment, the diameter of the second tube segment gradually decreases from the proximal end to the distal end, or when the second tube segment is a spring tube, the pitch of the second tube segment gradually increases from the proximal end to the distal end.

5. The guide wire according to any one of claims 1 to 4, characterized in that, The coating layer includes a first coating segment, a second coating segment and a third coating segment, the first coating segment covers the proximal end of the elastic tube, the third coating segment covers the distal end of the elastic tube, and the second coating segment connects the first coating segment and the third coating segment; The hardness of the second coating segment is less than the hardness of the first coating segment and greater than the hardness of the third coating segment.

6. A control handle, characterized in that, The control handle is matched with the guide wire according to any one of claims 1 to 5. The control handle includes a housing, a bending adjustment member and a transmission device. The transmission device is arranged in the housing. The bending adjustment member is located outside the housing, and one end thereof passes through the housing and is connected to the transmission device. The proximal end of the traction wire of the guide wire is connected to the transmission device. The bending adjustment member controls the transmission device to drive the guide wire to move proximally so that the distal end of the guide wire bends.

7. The control handle according to claim 6, wherein The transmission device includes an input member and an output member connected in mesh. The input member is connected to the bending adjustment member. The traction wire is wound around the output member. The input member rotates to drive the output member to move, thereby driving the proximal end of the guide wire to move and controlling the distal end of the guide wire to bend.

8. The control handle according to claim 7, characterized in that, The input member is a worm gear, the output member is a worm, and the helix angles of the worm gear and the worm are less than the corresponding friction angles, so that the worm gear and the worm can be self-locked.

9. The control handle according to claim 7, characterized in that, The control handle further includes a locking device. The bending adjustment member has a connecting shaft. The bending adjustment member is connected to the input member through the connecting shaft. The locking device is arranged in the housing and can lock or unlock the bending adjustment member; The locking device includes a locking wrench and a shaft clamp. The connecting shaft is located in the shaft clamp. The locking wrench controls the shaft clamp to clamp or release the connecting shaft.

10. The control handle according to claim 7, characterized in that, The input member is a connecting rod, the output member is a slider, the slider is slidably disposed in the housing, one end of the connecting rod is connected to the slider, the other end is connected to the bending member, and the traction wire is connected to the slider and moves with the slider.

11. The control handle according to claim 10, wherein The control handle further includes a locking device, the locking device is disposed in the housing and is connected to the connecting rod; The locking device includes a direct-acting damper.

12. An intervention system, characterized in that, Comprising a guide wire according to any one of claims 1 to 5 and a control handle according to any one of claims 6 to 11, the control handle is connected to the distal end of the guide wire to control the bending of the distal end of the guide wire.

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