Guide wire structure and guide wire device
By improving the design of the core shaft and spring connection point of the guidewire structure and the handle drive structure, the problem of the guidewire structure puncturing the blood vessel during the straightening process is solved, achieving safer and more convenient intravascular operation.
Patent Information
- Application Number
- CN202422360329.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The hardness of the end of the guidewire structure increases during the straightening process, making it easy to puncture blood vessels.
The connection point design between the core shaft and the spring in the guidewire structure transmits elastic force through the third connection point to avoid increasing the hardness of the core shaft end, and a handle structure is provided for easy operation.
The risk of the guidewire structure puncturing the blood vessel is reduced, and the convenience and accuracy of the operation are improved.
Smart Images
Figure CN223416569U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a guide wire structure and a guide wire device. Background Art
[0002] A guidewire is a surgical medical device that extends into a blood vessel through a guidewire structure to guide other instruments into the vessel, perform intravascular positioning, or establish intravascular pathways. Because human blood vessels have numerous branches, and their extension directions and bending angles vary, some guidewire structures can be bent to better penetrate the blood vessels for surgery. By adjusting the degree of curvature of the guidewire's front end, the guidewire structure is matched to the target blood vessel, facilitating surgical procedures. The gravitational force of the guidewire structure is an indicator of the hardness of the guidewire end. The greater the gravitational force, the harder the end of the guidewire structure, and the more likely it is to damage the blood vessel.
[0003] In the related technology, the guide wire structure includes a spring and a core shaft. The spring is sleeved outside the core shaft, and the two ends of the spring are fixedly connected to the two ends of the core shaft respectively. A bending section is provided at one end of the core shaft. The operator straightens or bends the core shaft by operating the spring, thereby straightening or bending the guide wire structure.
[0004] However, in the above-mentioned related technology, when the spring pulls the curved section of the core shaft and forces the core shaft to straighten, the distal end of the guide wire structure is tightened by the pulling action of the spring, so that the hardness of the part of the guide wire structure located in the curved section will increase significantly with the degree of straightening of the guide wire structure, causing the end of the guide wire structure to easily puncture the blood vessel. Utility Model Content
[0005] In view of this, the present invention provides a guidewire structure and a guidewire device to solve the problem that during the straightening process of the guidewire structure, the hardness of the end of the guidewire structure increases, which may easily puncture the blood vessel.
[0006] In the first aspect, the utility model provides a guide wire structure, comprising: a core shaft, having a proximal end close to an operator and a distal end away from the operator, the distal end of the core shaft having a curved section, the core shaft being an elastic member and the curved section being arc-shaped when not subjected to external force, and the arc of the curved section having an end close to the proximal end of the core shaft as a starting end; a spring, having a proximal end close to the operator and a distal end away from the operator, the spring being sleeved outside the core shaft, the proximal end of the spring being fixedly connected to the proximal end of the core shaft and forming a first connection point, the distal end of the spring being fixedly connected to the distal end of the core shaft to form a second connection point, a point at the distal end of the core shaft being fixedly connected to a corresponding position of the distal end of the spring to form a third connection point, and the third connection point being located between the starting end and the distal end of the core shaft.
[0007] Beneficial effect: The spring is sleeved on the outside of the core shaft, and 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 through 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.
[0008] In an optional embodiment, the arc end of the curved section close to the distal end of the core shaft is the 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.
[0009] 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 away from the third connection point from increasing, thereby reducing the risk of puncturing the blood vessel.
[0010] In an optional embodiment, the third connection point is provided at the terminal end of the curved section.
[0011] 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.
[0012] In an optional embodiment, the angle between the portion of the core shaft located at the starting end and the straight section is c, and satisfies 0°<c≤180°.
[0013] Beneficial effects: The angle between the straight section of the core shaft and the part of the core shaft at the starting end determines the curvature of the curved section of the guidewire structure. By limiting c, the guidewire structure has different bending ranges. The larger c is, the greater the angle adjustment of the guidewire structure, and the width of the curved section of the guidewire structure is also correspondingly larger. Guidewire structures with different curvatures are suitable for different human vascular tissues, for operators to choose according to their needs.
[0014] In an optional embodiment, the distance between the third connection point and the distal end of the core shaft is a, and satisfies a≤2mm.
[0015] Beneficial effect: By controlling the distance between the third connection point and the distal end of the core shaft, the radius of the movement trajectory of the distal end of the guide wire structure when the guide wire structure is bent is controlled. The larger a is, the larger the radius of the movement trajectory of the distal end of the guide wire when adjusting the bend, which is more unfavorable for the operation of the guide wire in small blood vessel structures.
[0016] In an optional embodiment, the third connection point is located on the curved segment.
[0017] Beneficial effect: By setting the third connection point on the curved section, the operator is limited in the maximum range of adjustment of the guide wire bend, and the angle of the guide wire structure can be controlled during the straightening process, making it suitable for some environments that require a fixed guide wire bend angle.
[0018] In an optional embodiment, the core shaft is welded to the spring at the first connection point, the second connection point and the third connection point respectively.
[0019] Beneficial effect: The core shaft and the spring are connected by welding, which has low processing cost and high processing speed, and is convenient for improving product production capacity.
[0020] In a second aspect, the utility model further provides a guidewire device, comprising: the guidewire structure mentioned above; a handle structure, comprising a shell, the guidewire structure passes through the shell, and the shell is provided with a driving structure for driving the spring to move.
[0021] Beneficial effects: The handle structure is provided for the convenience of the operator to hold, and the driving structure provided on the shell is used to drive the spring of the guide wire structure, thereby replacing the operator's manual direct operation of the spring, making the operation of the guide wire structure more convenient, accurate and fast.
[0022] In an optional embodiment, the driving structure includes a sliding member and a driving member, the sliding member is slidably connected to the shell and fixedly connected to the spring, suitable for driving the spring and the shell to move relative to each other, and the driving member is suitable for driving the sliding member to slide.
[0023] Beneficial effect: The sliding member is fixedly connected to the spring, thereby being able to drive the spring to move relative to the housing; the driving member drives the sliding member to slide, thereby indirectly controlling the movement of the spring, making it easier for operators to operate the spring.
[0024] In an optional embodiment, the driving structure is rotatably connected to the shell, the sliding member slides along the length direction of the shell, and the sliding member is threadedly engaged with the driving structure.
[0025] Beneficial effects: Through the threaded cooperation of the driving part and the sliding part, the operator rotates the driving part to accurately adjust the position of the sliding part, and the threaded driving part and the sliding part can achieve self-locking. The force from the sliding part is not easy to cause the position of the driving part to change. Therefore, when the operator does not operate the driving part, the position of the sliding part can be kept stable, thereby maintaining the stability of the guide wire structure bend. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the specific implementation methods of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0027] Figure 1 A guide wire structure of an embodiment of the present utility model is used to reflect the overall structural diagram;
[0028] Figure 2 This is a schematic diagram of a guide wire structure according to an embodiment of the present invention, used to illustrate the positions of a spring and a core shaft structure;
[0029] Figure 3 This is a schematic diagram of the overall structure of a guide wire device according to an embodiment of the present invention, and a schematic diagram of the handle structure;
[0030] Figure 4 This is a schematic diagram of a guide wire device according to an embodiment of the present invention, used to illustrate the positional relationship between the handle and the guide wire structure.
[0031] Description of reference numerals:
[0032] 100. Core shaft; 101. Bending section; 1011. Starting end; 1012. Ending end; 200. Spring; 300. First connection point; 400. Second connection point; 500. Third connection point; 600. Handle; 601. Housing; 602. Driving member; 603. Sliding member. DETAILED DESCRIPTION
[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts shall fall within the scope of protection of the present invention.
[0034] The following combination Figures 1 to 4 , describing the embodiments of the present utility model.
[0035] According to an embodiment of the present invention, a guide wire structure is provided. Figure 1 and Figure 2 , including: a core shaft 100, having a proximal end close to the operator and a distal end away from the operator, the distal end of the core shaft 100 has a curved section 101, the core shaft 100 is an elastic member and the curved section 101 is arc-shaped when not subjected to external force, and the arc of the curved section 101 The end close to the proximal end of the core shaft 100 is a starting end 1011; a spring 200, having a proximal end close to the operator and a distal end away from the operator, the spring 200 is sleeved on the outside of the core shaft 100, the proximal end of the spring 200 is fixedly connected to the proximal end of the core shaft 100 and forms a first connection point 300, the distal end of the spring 200 is fixedly connected to the distal end of the core shaft 100 to form a second connection point 400, and a point at the distal end of the core shaft 100 is fixedly connected to the corresponding position of the distal end of the spring 200 to form a third connection point 500, and the third connection point 500 is located between the starting end 1011 and the distal end of the core shaft 100.
[0036] In this embodiment, the spring 200 is sleeved on the outside of the core shaft 100, and the two end portions of the core shaft 100 are respectively connected to the corresponding different ends of the spring 200, so that the core shaft 100 and the spring 200 are stably connected, and the curved section 101 of the core shaft 100 is in a curved state when not subjected to external force. When the operator operates the spring 200 to stretch the distal part of the spring 200, due to the setting of the second connection point 400, the elastic force of the spring 200 is transmitted to the core shaft 100 via the second connection point 400 when it is transmitted to the core shaft 100, rather than being transmitted to the core shaft 100 through the first connection point 300. Therefore, the part between the second connection point 400 of the core shaft 100 and the distal end of the core shaft 100 does not receive the elastic force of the spring 200, and there will be no tightening effect, thereby avoiding the situation where the hardness of the end of the core shaft 100 is increased, resulting in puncture of the blood vessel.
[0037] Specifically, in the above embodiment, the guide wire is composed of a core shaft 100 and a spring 200, wherein the spring 200 is sleeved on the outside of the core shaft 100. The overall shape of the guide wire is mainly affected by the shape of the core shaft 100. The curved section 101 of the core shaft 100 is elastic and has a fixed curved shape when not subjected to external force. The core wire as a whole, except for the curved section 101, can be freely straightened or bent to adapt to the complex vascular environment. When the spring 200 is subjected to external force, causing the distal end to stretch and the proximal end to compress, the curved section 101 of the core wire is also subjected to a pulling force toward the proximal end along the extension direction of the core wire, thereby forcing the core wire to straighten and tighten. After the spring 200 returns to its natural state, the curved section 101 of the core shaft 100 loses the external force and recovers a specific curved shape under the action of its own elastic force. It should be noted that the bending and straightening of the bending section 101 of the core shaft 100 is a continuous and uniform process. The operator can adjust the amplitude of the operating spring 200 to make the shape of the bending section 101 stop at any intermediate state, thereby achieving stepless adjustment of the curvature.
[0038] In one embodiment, see Figure 1 and Figure 2 The arc-shaped end of the curved section 101 close to the distal end of the core shaft 100 is the terminal end 1012, and a straight section is provided on the core shaft 100 between the terminal end 1012 and the distal end of the core shaft 100, and the third connection point 500 is located between the terminal end 1012 and the distal end of the core shaft 100.
[0039] Specifically, the core shaft 100 including the curved section 101 and the straight section is integrally formed, and the third connection point 500 is located at the junction of the straight section and the curved section 101, or the third connection point 500 is located on the straight section.
[0040] In this embodiment, when the operator operates the spring 200, the spring 200 transmits the elastic force to the core shaft 100 via the third connection point 500, and then applies elastic force between the third connection point 500 on the core shaft 100 and the starting end 1011 of the curved section 101, thereby forcing the curved section 101 to tighten and straighten, and then blocks the stress transmission on the core shaft 100 through the third connection point 500, 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 500 from increasing, thereby reducing the risk of puncturing the blood vessel.
[0041] In one embodiment, see Figure 1 and Figure 2 , the third connection point 500 is located at the terminal end 1012 of the curved section 101 .
[0042] Specifically, the third connection point 500 is located at the terminal end 1012 of the curved end, that is, the third connection point 500 is located at the junction of the curved end and the straight section.
[0043] In this embodiment, since the third connection point 500 is located at the junction of the straight section and the curved section 101, rather than being set on the curved section 101, it prevents the hardness of the tip from increasing and also avoids the situation where the curved section 101 cannot be fully straightened due to the blocking of stress transfer, thereby ensuring the adjustment range of the curvature of the tip of the guidewire structure.
[0044] In one embodiment, the angle between the portion of the core shaft 100 located at the starting end 1011 and the straight section is c, and satisfies 0°<c≤180°.
[0045] In this embodiment, the angle between the straight section of the core shaft 100 and the part of the core shaft 100 located at the starting end 1011 determines the curvature of the curved section 101 of the guidewire structure. By limiting c, the guidewire structure has different bending ranges. The larger c is, the greater the angle adjustment of the guidewire structure, and the width of the curved section 101 of the guidewire structure is correspondingly larger. Guidewire structures with different curvatures are suitable for different human vascular tissues, for operators to choose according to their needs.
[0046] In one embodiment, the distance between the third connection point 500 and the distal end of the core shaft 100 is a, and satisfies a≤2 mm.
[0047] In this embodiment, by controlling the distance between the third connection point 500 and the distal end of the core shaft 100, the radius of the movement trajectory of the distal end of the guidewire structure when the guidewire structure is bent is controlled. The larger a is, the larger the radius of the movement trajectory of the distal end of the guidewire when the bend is adjusted, and the more unfavorable it is for the operation of the guidewire in small blood vessel structures.
[0048] In one embodiment, the third connection point 500 is located on the curved segment 101 .
[0049] In this embodiment, by setting the third connection point 500 on the curved section 101, the operator's maximum range of adjustment of the guide wire bend is limited, and the angle of the guide wire structure can be controlled during the straightening process, making it suitable for some environments that require a fixed guide wire bend angle.
[0050] In the above embodiment, illustratively, when the third connection point 500 is disposed in the middle of the bending section 101 , the range of adjustment of the bending angle is half of the maximum bending angle.
[0051] In one embodiment, the core shaft 100 and the spring 200 are welded at the first connection point 300 , the second connection point 400 and the third connection point 500 , respectively.
[0052] In this embodiment, the core shaft 100 and the spring 200 are connected by welding, which has low processing cost and high processing speed, and is convenient for improving the production capacity of the product.
[0053] According to an embodiment of the present invention, on the other hand, a guide wire device is also provided. Figure 3 and Figure 4 , comprising: the guidewire structure mentioned above; a handle 600 structure comprising a housing 601, the guidewire structure passing through the housing 601, the housing 601 being provided with a drive structure for driving the spring 200 to move.
[0054] In this embodiment, the handle 600 structure is provided for the convenience of the operator to hold, and the driving structure provided on the shell 601 is used to drive the spring 200 of the guide wire structure, thereby replacing the operator's manual direct operation of the spring 200, making the operation of the guide wire structure more convenient, accurate and fast.
[0055] In one embodiment, the driving structure includes a sliding member 603 and a driving member 602. The sliding member 603 is slidably connected to the housing 601 and fixedly connected to the spring 200, suitable for driving the spring 200 and the housing 601 to move relative to each other. The driving member 602 is suitable for driving the sliding member 603 to slide.
[0056] In this embodiment, the sliding member 603 is fixedly connected to the spring 200, thereby being able to drive the spring 200 to move relative to the housing 601. The driving member 602 drives the sliding member 603 to slide, thereby indirectly controlling the movement of the spring 200, making it easier for the operator to operate the spring 200.
[0057] In one embodiment, the driving structure is rotatably connected to the housing 601 , and the sliding member 603 slides along the length direction of the housing 601 , and the sliding member 603 is threadedly engaged with the driving structure.
[0058] In this embodiment, the driving member 602 and the sliding member 603 are threadedly matched, and the operator rotates the driving member 602 to accurately adjust the position of the sliding member 603, and the threaded driving member 602 and the sliding member 603 can achieve self-locking. The force from the sliding member 603 is not easy to cause the position of the driving member 602 to change. Therefore, when the operator does not operate the driving member 602, the position of the sliding member 603 can be kept stable, thereby maintaining the stability of the guide wire structure bend.
[0059] Although the embodiments of the present invention have been described with reference to 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 shall fall within the scope defined by the appended claims.
Claims
1. A guide wire structure, characterized in that: include: A core shaft (100) has a proximal end close to an operator and a distal end away from the operator, the distal end of the core shaft (100) has a curved section (101), the core shaft (100) is an elastic member, and the curved section (101) is arc-shaped when not subjected to external force, and the end of the arc of the curved section (101) close to the proximal end of the core shaft (100) is a starting end (1011); The spring (200) has a proximal end close to the operator and a distal end away from the operator. The spring (200) is sleeved outside the core shaft (100). The proximal end of the spring (200) is fixedly connected to the proximal end of the core shaft (100) to form a first connection point (300). The distal end of the spring (200) is fixedly connected to the distal end of the core shaft (100) to form a second connection point (400). A point at the distal end of the core shaft (100) is fixedly connected to a corresponding position at the distal end of the spring (200) to form a third connection point (500). The third connection point (500) is located between the starting end (1011) and the distal end of the core shaft (100).
2. The guide wire structure according to claim 1, characterized in that The arc-shaped end of the curved section (101) close to the distal end of the core shaft (100) is a terminal end (1012), a straight section is provided on the core shaft (100) between the terminal end (1012) and the distal end of the core shaft (100), and the third connection point (500) is located between the terminal end (1012) and the distal end of the core shaft (100).
3. The guide wire structure according to claim 2, characterized in that The third connection point (500) is provided at the terminal end (1012) of the curved section (101).
4. The guide wire structure according to claim 2, characterized in that The included angle between the portion of the core shaft (100) located at the starting end (1011) and the straight section is c, and satisfies 0°<c≤180°.
5. The guide wire structure according to any one of claims 2 to 4, characterized in that: The distance between the third connection point (500) and the distal end of the core shaft (100) is a, and satisfies a≤2mm.
6. The guide wire structure according to claim 1, characterized in that The third connection point (500) is located on the curved section (101).
7. The guide wire structure according to claim 1, characterized in that: The core shaft (100) and the spring (200) are respectively welded and connected at the first connection point (300), the second connection point (400) and the third connection point (500).
8. A guide wire device, characterized in that: include: The guidewire structure according to any one of claims 1 to 7; The handle (600) structure comprises a shell (601), the guide wire structure passes through the shell (601), and the shell (601) is provided with a driving structure for driving the spring (200) to move.
9. The guide wire device according to claim 8, characterized in that The driving structure comprises a sliding member (603) and a driving member (602). The sliding member (603) is slidably connected to the housing (601) and fixedly connected to the spring (200), and is suitable for driving the spring (200) and the housing (601) to move relative to each other. The driving member (602) is suitable for driving the sliding member (603) to slide.
10. The guide wire device according to claim 9, characterized in that The driving structure is rotatably connected to the housing (601), the sliding member (603) slides along the length direction of the housing (601), and the sliding member (603) is threadedly engaged with the driving structure.