Bending-adjustable guide wire device

Abstract

The invention relates to the technical field of medical instruments, and discloses an adjustable bending guide wire device which comprises a guide wire structure which is provided with a near end close to an operator and a far end far away from the operator and comprises a mandrel and a spring, the periphery of the mandrel is sleeved with the spring, the far end of the mandrel is provided with a bending section, and the mandrel and the near end of the spring are connected to form a first connecting point; the mandrel is connected with the far end of the spring to form a second connecting point, and the mandrel is connected with the position, close to the far end, of the spring to form a third connecting point. The wire guide structure penetrates through the base frame, and the base frame is connected with the spring; the driving structure comprises a sliding part and a driving part; the driving part is suitable for driving the sliding part to slide; according to the guide wire structure, the problems that in the straightening process of the guide wire structure, the hardness of the tip of a guide wire result is improved, the blood vessel is easily punctured, the operation risk is increased, and the core shaft and the spring connecting part are easily separated during excessive straightening, and the guide wire result loses efficacy are solved.

Description

Technical Field

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

[0002] The guidewire device is a surgical medical device that is inserted into the blood vessel through the guidewire to guide other instruments into the blood vessel, perform intravascular positioning, or establish intravascular access. Since the human body has many blood vessels with different extension directions and bending angles, in order to better penetrate the blood vessels to complete the operation, some guidewires can be bent. By adjusting the bending degree of the front end of the guidewire, the guidewire can be matched with the target blood vessel to facilitate the operation.

[0003] In the related art, the guide wire device includes a guide wire structure and a handle, and the guide wire structure includes a core shaft and a spring, wherein the spring is a retractable elastic member, and the core shaft is an elastic member bent and arranged at one end away from the handle in a natural state, and the core shaft and the spring are connected to each other at the end away from the handle. When the guide wire is pulled relatively, the core shaft is pulled, and at the same time, the spring is compressed toward the end and tightened, thereby straightening the front end of the guide wire. After the pulling force on the spring is removed, the guide wire resumes its curvature.

[0004] However, in the above embodiment, since the bending degree of the guide wire is adjusted by pulling the spring to cause relative movement between the spring and the core shaft, when the core shaft is straightened, the elastic force of the spring is transmitted to the core shaft, and the core shaft is tightened during the straightening process, so that the hardness of the end of the core shaft increases with the straightening amplitude. The increased hardness of the end of the core shaft can easily lead to puncture of blood vessels, increasing the risk of surgery. At the same time, if the spring is excessively pulled, it can easily lead to increased straightening and hardness of the core shaft, and may also cause the connection between the core shaft and the spring to detach, causing the guide wire structure to fail. Summary of the invention

[0005] In view of this, the present invention provides an adjustable bend guidewire device to solve the problem that the hardness of the tip of the guidewire increases during the straightening process of the guidewire structure, which easily punctures the blood vessel and increases the risk of surgery, and excessive straightening easily causes the core shaft and the spring connection to disengage, making the guidewire ineffective.

[0006] The invention provides an adjustable curved guide wire device, comprising: a guide wire structure, having a proximal end close to an operator and a distal end away from the operator, comprising a core shaft and a spring, wherein the spring is sleeved on the outer circumference of the core shaft, and the distal end of the core shaft is provided with an arc-shaped curved section, the proximal end of the core shaft and the spring are connected to form a first connection point, the core shaft and the distal end of the spring are connected to form a second connection point, the core shaft and the spring are connected to form a third connection point at a position close to the distal end, the end of the curved section close to the proximal end is a starting end, and the third connection point is located between the starting end of the curved section and the distal end of the core shaft; a base frame, wherein the guide wire structure passes through the base frame, and the base frame is connected to the spring; a driving structure, which is arranged on the base frame, comprising a sliding member and a driving member, wherein the sliding member is connected to the spring, the sliding member is connected to the guide wire structure, and is suitable for driving the guide wire and the base frame to move relative to each other, and the driving member is suitable for driving the sliding member to slide; a limiting structure, which is arranged on the base frame, and the limiting structure is used to limit the sliding member.

[0007] Beneficial effect: The two end portions of the core shaft are respectively connected to the corresponding different ends of the spring, so that the core shaft and the spring are stably connected, and the bent section of the core shaft is in a bent state when not subjected to external force. When the operator operates the spring to stretch the distal end of the spring, due to the setting of the second connection point, the elastic force of the spring is transmitted to the core shaft via the second connection point when it is transmitted to the core shaft, rather than being transmitted to the core shaft via the first connection point. Therefore, the part between the second connection point of the core shaft and the distal end of the core shaft is not affected by the elastic force of the spring, and there will be no tightening effect, thereby avoiding the situation where the hardness of the end of the core shaft is increased and the blood vessel is punctured. At the same time, the guide wire structure is respectively connected to the sliding parts on the base frame and the driving structure, so that the guide wire structure is driven by operating the driving parts of the driving structure. During the operation, the spring is pulled during the sliding of the sliding part to realize the bending and straightening operations of the guide wire structure. A limiting structure is provided to limit the sliding range of the sliding part of the sliding part through the limiting structure, thereby limiting the straightening and bending amplitude of the guide wire structure by medical staff, thereby avoiding excessive straightening that causes the spring to be detached from the connection part of the core shaft, thereby causing the guide wire structure to fail. In addition, by limiting the straightening and bending amplitude of the guidewire structure, a bending state can also be calibrated during the operation. For example, in actual operation, when the guidewire structure is outside the patient's body, the medical staff obtains the angle of the blood vessel at the target position based on angiography and other related means, and first adjusts the position of the sliding member through the driving member to bend the guidewire structure into the target curvature, and then adjusts the adjustment member to limit the sliding position of the sliding member to this position so that the maximum straightening amplitude is the current state, and then the guidewire structure is extended into the blood vessel. In subsequent operations, although the driving member may be adjusted again to increase the curvature of the guidewire structure, the medical staff can quickly reset the guidewire structure to the bending amplitude when it is outside the body based on the current limiting structure of the sliding block, which is very convenient. In addition, due to the limitation of the maximum straightening amplitude, the medical staff can operate with confidence without worrying about failure of the guidewire structure.

[0008] In an optional embodiment, it further includes a first connecting member and a second connecting member, wherein the first connecting member is arranged on the sliding member and is used to limit the spring of the guide wire structure, and the second connecting member is arranged on the base frame and is used to limit the spring of the guide wire structure.

[0009] Beneficial effect: By setting the first connecting member and the second connecting member, the guide wire structure is connected to the sliding member on the base frame and the driving structure respectively, so that the guide wire structure is driven by operating the driving member of the driving structure. During operation, the first connecting member limits the sliding member and the spring, and the second connecting member limits the spring and the base, so that the spring is pulled during the sliding of the sliding member, thereby realizing the bending and straightening operations of the guide wire structure.

[0010] In an optional embodiment, the limiting structure includes a limiting member and an adjusting member, the limiting member is slidably connected to the base frame, the sliding trajectories of the sliding member and the limiting member are on the same straight line, the sliding member is provided with a limiting rod extending along the sliding direction of the sliding member, the limiting rod passes through the limiting member, a limiting block is provided on the peripheral side of the limiting rod, and the limiting member is provided with an abutment portion, which is suitable for blocking the limiting block to limit the sliding range of the sliding member.

[0011] Beneficial effect: The limiting rod passes through the limiting piece, and the limiting piece cooperates with the limiting block to limit the sliding piece, so that the sliding block and the limiting block can be slidably cooperate with the base frame at intervals and independently, which can not only limit the sliding block on the sliding track by the limiting block, but also avoid the overlap of the sliding track of the limiting block and the sliding block, thereby reducing the difficulty of production and assembly.

[0012] In an optional embodiment, the sliding member includes a first driving column and a first slider, the first slider is arranged on the first driving column and slidingly cooperates with the base, the first connecting member is arranged at the end of the first driving column, and the base is provided with a first sliding cavity adapted to the first slider, and the first slider is located in the first sliding cavity.

[0013] Beneficial effect: The sliding member is provided with a first slider for sliding cooperation with the base frame, thereby realizing the sliding cooperation between the sliding member and the base frame. At the same time, the setting of the first driving column ensures that the volume of the first slider is small, provides a structural basis for the cooperation between the sliding member and the driving member, and provides a structural basis for the sliding member to drive the guide wire structure to move. At the same time, the setting of the first sliding cavity provides a stable sliding trajectory for the first slider, and also limits the sliding distance of the first slider to avoid excessive sliding distance, resulting in failure of the cooperation between the sliding member and the driving member, or over-driving the guide wire structure, causing operational risks and the possibility of failure of the guide wire structure.

[0014] In an optional embodiment, the driving member is rotatably connected to the base frame and is threadedly connected to the first driving column. When the driving member rotates, the first driving column drives the first sliding block to slide.

[0015] Beneficial effect: The driving member is rotatably connected to the base frame and cooperates with the sliding member thread. When the driving member rotates, the sliding member slides along the sliding track driven by the thread, and the thread provides a positioning effect for the sliding member, thereby reducing the sliding of the sliding member due to operational errors during the operation and reducing the risk of surgical misoperation.

[0016] In an optional embodiment, the limiting member includes a second driving column and a second slider, the second slider is slidably matched with the second driving column and the base frame, the base frame is provided with a second sliding cavity adapted to the second slider, and the second slider is located in the second sliding cavity.

[0017] Beneficial effect: The sliding cooperation between the second slider and the base is realized, and the sliding cooperation between the limit member and the base is realized. The setting of the second driving column provides a structural basis for the cooperation between the limit member and the adjusting member. The setting of the second sliding cavity adapted to the second slider provides a stable sliding trajectory for the sliding of the second slider, and at the same time limits the sliding distance of the second slider, thereby preventing the limit member from being separated from the adjusting member due to excessive operation by medical staff, resulting in adjustment failure.

[0018] In an optional embodiment, the adjusting member is rotatably connected to the base frame and is threadedly connected to the limiting member, and when the limiting member rotates, the second driving column drives the second sliding block to slide.

[0019] Beneficial effect: By setting the adjusting part to be rotatably connected to the base frame and to be threadedly connected to the limiting part, when the adjusting part rotates, the thread drives the limiting part to slide along the sliding track. At the same time, the threaded connection provides a positioning effect for the limiting part. When the medical staff does not rotate the adjusting part, the limiting part will not slide randomly due to being pushed, thereby achieving a stable limitation on the sliding range of the sliding part.

[0020] In an optional embodiment, the arc end of the curved section close to the distal end of the core shaft is a terminating end, a straight section is provided on the core shaft between the terminating end and the distal end of the core shaft, and the third connection point is located between the terminating end and the distal end of the core shaft.

[0021] Beneficial effect: When the operator operates the spring, the spring transmits the elastic force to the core shaft via the third connection point, and then applies elastic force between the third connection point on the core shaft and the starting end of the curved section, thereby forcing the curved section to tighten and straighten, and then blocks the stress transmission on the core shaft through the third connection point, preventing the hardness of the straight section from increasing, and avoiding the hardness of the tip of the straight section far away from the third connection point from increasing, thereby reducing the risk of puncturing the blood vessel.

[0022] In an optional embodiment, the third connection point is provided at the terminal end of the curved section.

[0023] Beneficial effect: Since the third connection point is located at the junction of the straight section and the curved section instead of being set on the curved section, it prevents the tip hardness from increasing and also avoids the situation where the curved section cannot be fully straightened due to the stress transfer being blocked, thereby ensuring the adjustment range of the curvature of the guide wire structure tip.

[0024] In an optional embodiment, the third connection point is located on the curved segment.

[0025] Beneficial effect: By setting the third connection point on the curved section, the operator is limited in the maximum range of adjusting the guide wire bend, and the angle of the guide wire structure can be controlled during the straightening process, so that it is suitable for some environments that require a fixed guide wire bend angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 An adjustable curved guide wire device according to an embodiment of the present invention is used to embody a schematic diagram of the overall structure;

[0028] Figure 2 This is an overall schematic diagram of an adjustable curved guidewire device according to an embodiment of the present invention, which is used to embody the guidewire structure;

[0029] Figure 3 A cross-sectional schematic diagram of an adjustable curved guidewire device according to an embodiment of the present invention, which is used to illustrate the interior of a guidewire structure;

[0030] Figure 4 This is a schematic diagram of an adjustable curved guide wire device according to an embodiment of the present invention, which is used to reflect the structural position of a spring and a core shaft;

[0031] Figure 5 A schematic diagram of the overall structure of an adjustable curved guide wire device according to an embodiment of the present invention is a schematic diagram of the handle structure;

[0032] Figure 6 This is a schematic diagram of an adjustable curved guide wire device according to an embodiment of the present invention, which is used to reflect the positional relationship between a handle and the adjustable curved guide wire device.

[0033] Description of reference numerals:

[0034] 100, base frame; 101, first sliding cavity; 102, second sliding cavity; 200, driving structure; 201, sliding member; 2011, limiting rod; 2012, limiting block; 2013, first driving column; 2014, first sliding block; 202, driving member; 300, limiting structure; 301, limiting member; 3011, abutment portion; 3012, second driving column; 3013, second sliding block; 302, adjusting member; 401, first connecting member; 402, second connecting member; 403, conical sleeve; 404, cylindrical sleeve; 405, elastic clamp; 500, guide wire structure; 501, core shaft; 5011, bending section; 5012, starting end; 5013, ending end; 502, spring; 503, first connecting point; 504, second connecting point; 505, third connecting point. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] The guidewire device extends its guidewire structure into the blood vessel to guide other instruments into the blood vessel to perform surgical operations such as setting a stent in the blood vessel and removing blood clots. In order to match the blood vessel structure, one end of the guidewire structure has a certain bending angle, and the bending angle of the end of the guidewire structure can be adjusted by the handle of the guidewire device.

[0037] The guidewire structure in the related art generally includes two parts, an inner core and an outer tube, and both the inner core and the outer tube are elastic parts, with the end of the guidewire structure extending into the human body as the distal end, and the end close to the handle as the proximal end. The distal end of the inner core is in a bent state in a natural state, and can be greatly bent and deformed. The outer tube is sleeved on the outside of the inner core, and the distal end of the outer tube is fixedly connected to the distal end of the inner core. The outer tube has good telescopic deformation and bending deformation capabilities, and bends with the inner core in a natural state. When the handle adjusts the bending angle of the guidewire structure, the handle pulls the inner core and the outer tube of the guidewire structure at the same time, and at the same time limits the outer tube at a certain point on the pulling position close to the distal end, so that the outer tube of the handle close to the distal end is compressed due to the push, and the inner core is pulled, and the inner core is gradually affected by the compressed and straightened outer tube, so that it gradually straightens with the outer tube.

[0038] However, the guidewire structure needs to meet at least two conditions: one is that the diameter is small so that it can be inserted into the blood vessel, and the other is that the g-force at the front end of the guidewire structure is small (g-force is the force borne by the guidewire head end when it is bent) to reduce the possibility of the distal end of the guidewire structure puncturing the blood vessel. A small diameter will result in a smaller load that the connection pad between the outer tube and the inner core of the guidewire structure can withstand, which can easily cause the connection point to be disengaged when medical staff over-straighten the distal end of the guidewire structure, making the guidewire ineffective and easily causing danger to the patient; and in the process of the distal end of the guidewire structure gradually straightening, the outer tube is compressed and gradually straightened, resulting in an increase in the g-force of the outer tube, which can easily lead to the risk of puncturing the blood vessel.

[0039] Combine the following Figures 1 to 6 , describing an embodiment of the present invention.

[0040] According to an embodiment of the present invention, on the one hand, an adjustable curved guide wire device is provided. Figures 1 to 4 , comprising: a guide wire structure 500, having a proximal end close to an operator and a distal end away from the operator, comprising a core shaft 501 and a spring 502, the spring 502 being sleeved on the outer circumference of the core shaft 501, the distal end of the core shaft 501 being provided with an arc-shaped curved section 5011, the proximal ends of the core shaft 501 and the spring 502 being connected to form a first connection point 503, the distal ends of the core shaft 501 and the spring 502 being connected to form a second connection point 504, the core shaft 501 and the spring 502 being connected near the distal end to form a third connection point 505, the end of the curved section 5011 near the proximal end being a starting end 5012, the third connection point 50 5 is located between the starting end 5012 of the curved section 5011 and the distal end of the core shaft 501; the base frame 100, the guide wire structure 500 passes through the base frame 100, and the base frame 100 is connected to the spring 502; the driving structure 200 is arranged on the base frame 100, including a sliding member 201 and a driving member 202, the sliding member 201 is connected to the spring 502, the sliding member 201 is connected to the guide wire structure 500, and is suitable for driving the guide wire and the base frame 100 to move relative to each other, and the driving member 202 is suitable for driving the sliding member 201 to slide; the limiting structure 300 is arranged on the base frame 100, and the limiting structure 300 is used to limit the sliding member 201.

[0041] In this embodiment, the two end portions of the core shaft 501 are respectively connected to the corresponding different ends of the spring 502, so that the core shaft 501 and the spring 502 are stably connected, and the bent section 5011 of the core shaft 501 is in a bent state when not subjected to external force. When the operator operates the spring 502 to stretch the distal end of the spring 502, due to the setting of the second connection point 504, the elastic force of the spring 502 is transmitted to the core shaft 501 via the second connection point 504, rather than being transmitted to the core shaft 501 via the first connection point 503. Therefore, the part between the second connection point 504 of the core shaft 501 and the distal end of the core shaft 501 is not affected by the elastic force of the spring 502, and there will be no tightening effect, thereby avoiding the increase in the hardness of the end of the core shaft 501, which may lead to puncture of the blood vessel. At the same time, the guide wire structure 500 is connected to the sliding member 201 on the base frame 100 and the driving structure 200 respectively, so that the guide wire structure 500 is driven by operating the driving member 202 of the driving structure 200. During the operation, the spring 502 is pulled during the sliding of the sliding member 201 to realize the bending and straightening operations of the guide wire structure 500. A limiting structure 300 is set to limit the sliding range of the sliding part of the sliding member 201 through the limiting structure 300, thereby limiting the straightening and bending amplitude of the guide wire structure 500 by medical staff, thereby avoiding excessive straightening that causes the spring 502 to be disconnected from the connection between the core shaft 501, thereby causing the guide wire structure 500 to fail. In addition, by limiting the amplitude of straightening and bending of the guidewire structure 500, a bending state can also be calibrated during the operation. For example, in the actual operation, when the guidewire structure 500 is outside the patient's body, the medical staff obtains the angle of the blood vessel at the target position according to relevant means such as angiography, and first adjusts the position of the sliding member 201 through the driving member 202 to bend the guidewire structure 500 into the target curvature, and then adjusts the adjustment member 302 to limit the sliding position of the sliding member 201 to this position so that the maximum straightening amplitude is the current state, and then the guidewire structure 500 is inserted into the blood vessel. In the subsequent operation, although the driving member 202 may be adjusted again to increase the curvature of the guidewire structure 500, the medical staff can quickly reset the guidewire structure 500 to the bending amplitude when it is outside the body according to the current limit structure 300 limiting the sliding block, which is very convenient. In addition, due to the limitation of the maximum straightening amplitude, the medical staff can operate with confidence without worrying about the failure of the guidewire structure 500.

[0042] Specifically, in the above embodiments, there is no limitation on the specific form of the base frame 100. The base frame 100 may be a handle shell and provide a structural basis for the installation of other structural components. In some embodiments not shown, the base frame 100 may also be other forms of brackets instead of serving as a handle shell.

[0043] In addition, specifically, in the above-mentioned embodiment, the specific forms of the driving member 202, the sliding member 201, the limiting member 301 and the adjusting member 302 are not limited. The sliding member 201 can slide on the base frame 100 and drive the guide wire to move. The driving member 202 can drive the sliding member 201 to slide. The limiting member 301 can slide on the shell. The adjusting member 302 can drive the limiting member 301 to slide and position the limiting member 301 at any position during the sliding process. In some embodiments not shown, for example, the sliding member 20 1 is a slider slidably connected to the base frame 100, the driving member 202 is a pushing handle fixed on the slider, the pushing handle extends from the base frame 100 for the convenience of medical staff to push, the limiting member 301 is another slider slidably connected to the base frame 100, the adjusting member 302 is fixed on the limiting member 301, and a positioning screw that can press against the side wall of the base frame 100 to position the base frame 100 is threadedly connected to the adjusting member 302. The medical staff adjusts the position of the limiting member 301 by pushing the adjusting member 302, and presses the positioning screw against the base frame 100 to position the limiting member 301.

[0044] In one embodiment, see Figures 4 to 6 , also includes a first connecting member 401 and a second connecting member 402, the first connecting member 401 is arranged on the sliding member 201, and is used to limit the spring 502 of the guide wire structure 500, and the second connecting member 402 is arranged on the base frame 100, and is used to limit the spring 502 of the guide wire structure 500.

[0045] It should be noted that, in the above embodiment, there is no restriction on the specific forms of the first connecting member 401 and the second connecting member 402. The first connecting member 401 can be fixed. For example, the first connecting member 401 and the second connecting member 402 may include a tapered sleeve 403, and the opposite ends of the tapered sleeve 403 are provided with openings. The open end of the tapered sleeve 403 with a larger diameter has a cylindrical sleeve 404. The sleeve of the first connecting member 401 is threadedly matched with the base shell, and the sleeve of the second connecting member 402 is threadedly matched with the sliding member 201. The first connecting member 401 and the second connecting member 402 also include an elastic clamping claw 405. The first connecting member 401 The elastic clamping claw 405 is suitable for being able to be mounted on and extend into the inner side of the conical sleeve 403 of the first connecting member 401, and the elastic clamping claw 405 of the second connecting member 402 is arranged on the sliding member 201 and extends into the inner side of the conical sleeve 403 of the second connecting member 402, and the guide wire structure 500 passes through the openings at both ends of the conical sleeve 403. When the conical sleeve 403 rotates and moves closer to the corresponding base frame 100 or the sliding member 201, the conical inner wall of the conical sleeve 403 squeezes the clamping claw, so that the clamping claw is retracted and clamps the guide wire structure 500. According to the different degrees of squeezing of the clamping claw by the conical sleeve 403, the clamping claw can only clamp the outer tube outside the guide wire structure 500, or it can clamp the outer tube and the inner core at the same time.

[0046] In this embodiment, by setting a first connecting member 401 and a second connecting member 402, the guide wire structure 500 is connected to the sliding member 201 on the base frame 100 and the driving structure 200 respectively, so that the guide wire structure 500 is driven by operating the driving member 202 of the driving structure 200. During the operation, since the first connecting member 401 limits the sliding member 201 and the spring 502, and the second connecting member 402 limits the spring 502 and the base frame 100, the spring 502 is pulled during the sliding of the sliding member 201, thereby realizing the bending and straightening operations of the guide wire structure 500.

[0047] In one embodiment, see Figures 4 to 6 The limiting structure 300 includes a limiting member 301 and an adjusting member 302. The limiting member 301 is slidably connected to the base frame 100. The sliding trajectories of the sliding member 201 and the limiting member 301 are on the same straight line. The sliding member 201 is provided with a limiting rod 2011 extending along the sliding direction of the sliding member 201. The limiting rod 2011 passes through the limiting member 301. A limiting block 2012 is provided on the surrounding side of the limiting rod 2011. The limiting member 301 is provided with an abutting portion 3011. The abutting portion 3011 is suitable for blocking the limiting block 2012 to limit the sliding range of the sliding member 201.

[0048] Specifically, this embodiment does not limit the specific forms of the limiting member 301 and the adjusting member 302 , and the limiting member 301 only needs to be able to limit the sliding range of the sliding member 201 on the base frame 100 .

[0049] In this embodiment, the limiting rod 2011 passes through the limiting member 301, and the limiting member 301 cooperates with the limiting block 2012 to limit the sliding member 201, so that the sliding block and the limiting block can be spaced and independently slidably cooperate with the base frame 100, which can not only limit the sliding block on the sliding track by the limiting block, but also avoid the overlap of the sliding track of the limiting block and the sliding block, thereby reducing the difficulty of production and assembly.

[0050] In some of the above-mentioned embodiments, it should be noted that during operation, the spring 502 is pulled during the sliding of the sliding member 201 to achieve the bending and straightening operations of the guide wire structure 500, and a limiting structure 300 is provided. The position of the limiting member 301 is adjusted by the adjusting member 302, thereby limiting the sliding range of the sliding part of the sliding member 201, thereby limiting the straightening and bending amplitude of the guide wire structure 500 by medical staff, thereby avoiding excessive straightening that causes the spring 502 to be disconnected from the connection between the core shaft 501 and the failure of the guide wire structure 500. In addition, by limiting the amplitude of straightening and bending of the guidewire structure 500, a bending state can also be calibrated during the operation. For example, in the actual operation, when the guidewire structure 500 is outside the patient's body, the medical staff obtains the angle of the blood vessel at the target position according to relevant means such as angiography, and first adjusts the position of the sliding member 201 through the driving member 202 to bend the guidewire structure 500 to the target curvature, and then adjusts the adjustment member 302 so that the limit member 301 limits the sliding position of the sliding member 201 to this position, so that the maximum straightening amplitude is the current state, and then the guidewire structure 500 is inserted into the blood vessel. In the subsequent operation, although the driving member 202 may be adjusted again to increase the curvature of the guidewire structure 500, the medical staff can quickly reset the guidewire structure 500 to the bending amplitude when it is outside the body according to the current position of the limit member 301, which is very convenient. In addition, due to the limitation of the maximum straightening amplitude, the medical staff can operate with confidence without worrying about the failure of the guidewire structure 500.

[0051] In one embodiment, see Figures 4 to 6 The sliding member 201 includes a first driving column 2013 and a first slider 2014. The first slider 2014 is arranged on the first driving column 2013 and slidably cooperates with the base frame 100. The first connecting member 401 is arranged at the end of the first driving column 2013. The base frame 100 is provided with a first sliding cavity 101 adapted to the first slider 2014. The first slider 2014 is located in the first sliding cavity 101.

[0052] In this embodiment, the sliding member 201 is slidably matched with the base frame 100 by setting a first slider 2014 on the sliding member 201, thereby realizing the sliding match between the sliding member 201 and the base frame 100. At the same time, the setting of the first driving column 2013 ensures that the volume of the first slider 2014 is small, and provides a structural basis for the cooperation between the sliding member 201 and the driving member 202, and also provides a structural basis for the sliding member 201 to drive the guide wire structure 500 to move. At the same time, the setting of the first sliding cavity 101 provides a stable sliding trajectory for the first slider 2014, and also limits the sliding distance of the first slider 2014 to avoid excessive sliding distance, resulting in failure of the cooperation between the sliding member 201 and the driving member 202, or over-driving the guide wire structure 500, causing operational risks and the possibility of failure of the guide wire structure 500.

[0053] In one embodiment, see Figures 4 to 6 The driving member 202 is rotatably connected to the base frame 100 and is threadedly connected to the first driving column 2013. When the driving member 202 rotates, the first driving column 2013 drives the first slider 2014 to slide.

[0054] In this embodiment, the driving member 202 is rotatably connected to the base frame 100 and is threadedly matched with the sliding member 201. When the driving member 202 rotates, the sliding member 201 slides along the sliding track driven by the thread, and the thread provides a positioning effect for the sliding member 201, thereby reducing the sliding of the sliding member 201 due to operational errors during the operation and reducing the risk of surgical misoperation.

[0055] In one embodiment, see Figures 4 to 6 The limiting member 301 includes a second driving column 3012 and a second slider 3013. The second slider 3013 is slidably matched with the second driving column 3012 and the base frame 100. The base frame 100 is provided with a second sliding cavity 102 adapted to the second slider 3013. The second slider 3013 is located in the second sliding cavity 102.

[0056] In this embodiment, the sliding cooperation between the limit member 301 and the base frame 100 is realized by the sliding cooperation between the second slider 3013 and the base frame 100, and the second driving column 3012 is provided to provide a structural basis for the cooperation between the limit member 301 and the adjustment member 302. By providing a second sliding cavity 102 adapted to the second slider 3013, a stable sliding trajectory is provided for the sliding of the second slider 3013, and at the same time, the sliding distance of the second slider 3013 is also limited to prevent the limit member 301 from being separated from the adjustment member 302 due to excessive operation by medical staff, resulting in adjustment failure.

[0057] In one embodiment, see Figures 4 to 6 The adjusting member 302 is rotatably connected to the base frame 100 and is threadedly connected to the limiting member 301. When the limiting member 301 rotates, the second driving column 3012 drives the second sliding block 3013 to slide.

[0058] In this embodiment, the adjusting member 302 is rotatably connected to the base frame 100 and is threadedly connected to the limiting member 301. When the adjusting member 302 rotates, the thread drives the limiting member 301 to slide along the sliding track. At the same time, the threaded connection provides a positioning effect for the limiting member 301. When the medical staff does not rotate the adjusting member 302, the limiting member 301 will not slide randomly due to being pushed, thereby achieving a stable limitation on the sliding range of the sliding member 201.

[0059] In one embodiment, see Figure 2and Figure 3 The arc-shaped end of the curved section 5011 close to the distal end of the core shaft 501 is the terminal end 5013, and a straight section is provided on the core shaft 501 between the terminal end 5013 and the distal end of the core shaft 501, and the third connection point 505 is located between the terminal end 5013 and the distal end of the core shaft 501.

[0060] In this embodiment, when the operator operates the spring 502, the spring 502 transmits the elastic force to the core shaft 501 via the third connection point 505, and then applies elastic force between the third connection point 505 on the core shaft 501 and the starting end 5012 of the curved section 5011, thereby forcing the curved section 5011 to tighten and straighten, and then blocks the stress transmission on the core shaft 501 through the third connection point 505, preventing the hardness of the straight section from increasing, and avoiding the hardness of the tip of the straight section away from the third connection point 505 from increasing, thereby reducing the risk of puncturing the blood vessel.

[0061] In one embodiment, see Figure 2 and Figure 3 , the third connection point 505 is arranged at the terminal end 5013 of the curved section 5011.

[0062] In the present embodiment, since the third connection point 505 is located at the junction of the straight section and the curved section 5011 instead of being arranged on the curved section 5011, it prevents the hardness of the tip from increasing and also avoids the situation in which the curved section 5011 cannot be fully straightened due to the blocking of stress transfer, thereby ensuring the adjustment range of the curvature of the tip of the guide wire structure 500.

[0063] In one embodiment, see Figure 2 and Figure 3 , the third connection point 505 is located on the curved section 5011.

[0064] In this embodiment, by setting the third connection point 505 on the curved section 5011, the operator's maximum range of adjustment of the guide wire bend is limited, so that the angle of the guide wire structure 500 can be controlled during the straightening process, which is suitable for some environments that require a fixed guide wire bend angle.

[0065] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An adjustable curved guide wire device, characterized in that: include: The guide wire structure (500) has a proximal end close to an operator and a distal end away from the operator, and includes a core shaft (501) and a spring (502), wherein the spring (502) is sleeved on the outer periphery of the core shaft (501), and the distal end of the core shaft (501) is provided with an arc-shaped curved section (5011), and the proximal ends of the core shaft (501) and the spring (502) are connected to form a first connection point (503), and the core shaft (501) and the spring (502) are connected to each other. The distal end of the spring (502) is connected to form a second connection point (504), the core shaft (501) and the position of the spring (502) close to the distal end are connected to form a third connection point (505), the end of the curved section (5011) close to the proximal end is the starting end (5012), and the third connection point (505) is located between the starting end (5012) of the curved section (5011) and the distal end of the core shaft (501); A base frame (100), the guide wire structure (500) passes through the base frame (100), and the base frame (100) is connected to the spring (502); A driving structure (200) is disposed on the base frame (100), comprising a sliding member (201) and a driving member (202), wherein the sliding member (201) is connected to the spring (502), the sliding member (201) is connected to the guide wire structure (500), and is suitable for driving the guide wire and the base frame (100) to move relative to each other, and the driving member (202) is suitable for driving the sliding member (201) to slide; A limiting structure (300) is provided on the base frame (100), and the limiting structure (300) is used to limit the position of the sliding member (201).

2. The adjustable curved guide wire device according to claim 1, characterized in that: It also includes a first connecting member (401) and a second connecting member (402), wherein the first connecting member (401) is arranged on the sliding member (201) and is used to limit the spring (502) of the guide wire structure (500), and the second connecting member (402) is arranged on the base frame (100) and is used to limit the spring (502) of the guide wire structure (500).

3. The adjustable curved guide wire device according to claim 2, characterized in that: The limiting structure (300) comprises a limiting member (301) and an adjusting member (302); the limiting member (301) is slidably connected to the base frame (100); the sliding tracks of the sliding member (201) and the limiting member (301) are on the same straight line; the sliding member (201) is provided with a limiting rod (2011) extending along the sliding direction of the sliding member (201); the limiting rod (2011) passes through the limiting member (301); a limiting block (2012) is provided on the peripheral side of the limiting rod (2011); the limiting member (301) is provided with an abutting portion (3011); the abutting portion (3011) is suitable for blocking the limiting block (2012) so as to limit the sliding range of the sliding member (201).

4. The adjustable curved guide wire device according to claim 3, characterized in that: The sliding member (201) includes a first driving column (2013) and a first slider (2014); the first slider (2014) is disposed on the first driving column (2013) and slidably cooperates with the base frame (100); the first connecting member (401) is disposed at the end of the first driving column (2013); the base frame (100) is provided with a first sliding cavity (101) adapted to the first slider (2014); the first slider (2014) is located in the first sliding cavity (101).

5. The adjustable curved guide wire device according to claim 4, characterized in that: The driving member (202) is rotatably connected to the base frame (100) and is threadedly connected to the first driving column (2013). When the driving member (202) rotates, the first driving column (2013) drives the first sliding block (2014) to slide.

6. The adjustable curved guide wire device according to claim 3, characterized in that: The limiting member (301) includes a second driving column (3012) and a second sliding block (3013), wherein the second sliding block (3013) is slidably matched with the second driving column (3012) and the base frame (100), and the base frame (100) is provided with a second sliding cavity (102) adapted to the second sliding block (3013), and the second sliding block (3013) is located in the second sliding cavity (102).

7. The adjustable curved guide wire device according to claim 6, characterized in that: The adjusting member (302) is rotatably connected to the base frame (100) and is threadably connected to the limiting member (301). When the limiting member (301) rotates, the second driving column (3012) drives the second sliding block (3013) to slide.

8. The adjustable curved guide wire device according to any one of claims 1 to 7, characterized in that: The arc-shaped end of the curved section (5011) close to the distal end of the core shaft (501) is a terminal end (5013), and a straight section is provided on the core shaft (501) between the terminal end (5013) and the distal end of the core shaft (501), and the third connection point (505) is located between the terminal end (5013) and the distal end of the core shaft (501).

9. The adjustable curved guide wire device according to claim 8, characterized in that: The third connection point (505) is arranged at the terminal end (5013) of the curved section (5011).

10. The adjustable curved guide wire device according to claim 8, characterized in that: The third connection point (505) is located on the curved section (5011).

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