Traction guide wire

Abstract

The utility model discloses a traction guide wire, and belongs to the technical field of traction guide wires. The device comprises a spring; one end of the core wire is fixedly connected with one end of the spring, and the other end penetrates out of the other end of the spring; the adjusting male head is fixedly installed at the end, away from the end fixed to the core wire, of the spring, and a conical cylindrical surface is formed on the adjusting male head; the adjusting female head is in threaded connection with the adjusting male head, the adjusting female head is annularly provided with two or more wedge-shaped clamping blocks which are matched and abut against the conical cylindrical surface around the axis at intervals, and the core wire penetrates through the adjusting female head in a sliding mode. In the initial state, the wedge-shaped clamping blocks do not abut against the conical cylindrical surface, the two or more wedge-shaped clamping blocks do not clamp the core wire, the core wire can move relative to the spring, the orientation of the end of the spring is adjusted, when fixing is needed, the adjusting male head is grabbed, the adjusting female head is rotated, the adjusting female head rotates relative to the adjusting male head in a threaded mode, and the two or more wedge-shaped clamping blocks clamp the core wire, so that the core wire is fixed. And the core wire cannot be continuously pushed and pulled relative to the spring, so that the orientation of the end part of the spring is limited, and further surgical operation is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of traction guide wire technology, and in particular to a traction guide wire. Background Technology

[0002] A guidewire typically consists of a spring and a core wire. The spring and core wire are fixedly connected at one end, while the core wire extends through the other end of the spring. When the core wire is pulled, the fixed end of the spring and core wire bends, thus adjusting the direction of the guidewire. To facilitate operation, a handle is usually clamped onto the protruding core wire. The core wire is rotated or pulled using the handle. However, when the guidewire needs to be positioned within a curved blood vessel or other internal tissue structure, the operator must continuously pull the core wire to keep it relatively fixed to the spring, which hinders subsequent operations. Utility Model Content

[0003] The purpose of this utility model is to provide a traction guide wire to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows: a traction guide wire, comprising: a spring; a core wire, one end of which is fixedly connected to one end of the spring, and the other end of which passes through the other end of the spring; an adjusting male head, fixedly installed at the end of the spring away from the end fixed to the core wire, the adjusting male head forming a conical cylindrical surface; and an adjusting female head, threadedly connected to the adjusting male head, the adjusting female head having two or more wedge-shaped clamping blocks spaced around its axis, each adapted to and abutting against the conical cylindrical surface, the core wire slidingly passing through the adjusting female head, and when the adjusting female head rotates relative to the adjusting male head thread, the wedge-shaped clamping blocks can press against or disengage from the conical cylindrical surface, causing the two or more wedge-shaped clamping blocks to clamp or release the core wire.

[0005] This technical solution has at least the following beneficial effects: In the initial state, the wedge-shaped clamps do not contact the conical cylindrical surface, so that two or more wedge-shaped clamps do not clamp the core wire, and the core wire can move relative to the spring to adjust the orientation of the spring end. When fixation is required, by grasping the adjusting male head and rotating the adjusting female head, the adjusting female head rotates relative to the adjusting male head thread, and two or more wedge-shaped clamps clamp the core wire. The core wire cannot continue to be pushed or pulled relative to the spring, thereby limiting the orientation of the spring end to facilitate further surgical operations.

[0006] As a further improvement to the above technical solution, the adjusting female head has a first groove, and the sidewall of the first groove has a first thread. The outer side of the adjusting male head has a second thread that matches the first thread. This enables a threaded connection between the adjusting female head and the adjusting male head.

[0007] As a further improvement to the above technical solution, a second groove with a smaller diameter than the first groove is coaxially formed on the bottom wall of the first groove. A sandwich sleeve for the core wire to slide through is fixedly installed in the second groove. Two or more wedge-shaped clamping blocks are arranged around the sandwich sleeve and located in the first groove. The conical cylindrical surface is formed in the middle of the end face of the adjusting male head that is embedded in the first groove. The wedge-shaped clamping blocks are located inside the adjusting female head, making them less prone to damage, and the overall appearance of the adjusting female head is relatively simple.

[0008] As a further improvement to the above technical solution, one end of the adjusting male head is provided with a mounting groove for the spring end to be inserted, and the spring end is bonded and fixed to the side wall of the mounting groove. This improves the connection stability between the spring and the adjusting male head.

[0009] As a further improvement to the above technical solution, the end of the spring fixed to the core wire has a curved section, the helical gap of which is 0.23-0.27 mm. The helical gaps of the other parts of the spring, except for the curved section, are all smaller than the helical gap of the curved section. The curved section with a larger helical gap at the end of the spring makes it easier to bend the end of the spring, thus facilitating the adjustment of the orientation of the spring end.

[0010] As a further improvement to the above technical solution, a flattened section is formed on the core wire corresponding to the bending section, and inwardly concave arc-shaped surfaces are formed on both sides of the flattened section. This makes it easier for the core wire to bend at the flattened section, facilitating the adjustment of the orientation of the spring end.

[0011] As a further improvement to the above technical solution, the point where the thickness of the flattened section is smallest is offset from the end where the core wire is fixedly connected to the spring. When the spring initially bends, it will preferentially bend at the position with the smallest thickness in the flattened section. As the spring continues to bend, it will preferentially continue to bend at the flattened section closer to the end fixed to the core wire. This makes it less likely for the spring to protrude outwards and cause damage to the internal structure when it continues to bend, thus improving the safety of the spring when bending.

[0012] As a further improvement to the above technical solution, the outer ring of the adjusting male head is provided with multiple adjusting fins. This is to restrict the adjusting male head when the adjusting female head is rotated, preventing the adjusting male head from affecting the orientation of the spring as the adjusting female head rotates, thus ensuring operational stability and safety.

[0013] As a further improvement to the above technical solution, the outer side of the adjusting female head is provided with anti-slip patterns. This facilitates the rotation of the adjusting female head relative to the adjusting male head.

[0014] As a further improvement to the above technical solution, the outer side of the adjusting head is provided with rotation markings indicating the relationship between the rotation direction and the clamping and releasing of the wedge-shaped clamping block. This facilitates identification of the rotation direction of the adjusting head, prevents operational errors, and improves operational efficiency. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the male and female adjustment heads in an embodiment of the present invention.

[0018] Figure 3 This is an exploded view of the adjusting male head and adjusting female head in an embodiment of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the spring and the core wire fixed at one end in an embodiment of this utility model.

[0020] 100. Spring; 110. Bending section; 200. Core wire; 210. Flattened section; 211. Arc-shaped surface; 300. Adjusting male head; 310. Conical cylindrical surface; 320. Mounting groove; 330. Adjusting handle wing; 400. Adjusting female head; 410. First groove; 411. Second groove; 500. Sandwich sleeve; 510. Wedge-shaped clamp; 511. Wedge-shaped surface; 520. Anti-slip pattern; 530. Rotation mark. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] Reference Figure 1-4 The guide wire includes a spring 100 and a core wire 200. The spring 100 is made of 304 stainless steel. The spring 100 has a head end and a tail end, respectively, and is sleeved on the outside of the core wire 200. The core wire 200 is made of nickel-titanium material. The head end of the spring 100 is fixedly connected to one end of the core wire 200, and the other end of the core wire 200 extends beyond the tail end of the spring 100 for a certain distance. The head end of the spring 100, fixedly connected to the core wire 200, has a hemispherical head structure at its fixed end, the diameter of which is the same as or similar to the diameter of the spring 100. A curved section 110 is formed at the head end of the spring 100, one end of which, measured from the arc end of the head structure, has a length between 18-22 mm, specifically 20 mm. The thread clearance of the bent section 110 is between 0.23 and 0.27 mm, specifically, the thread clearance of the bent section 110 is 0.25 mm. The thread clearance of the spring 100 at all other locations except the bent section 110 is smaller than that of the bent section 110; specifically, the thread clearance of the spring 100 at all other locations except the bent section 110 is between 0.1 and 0.2 mm.

[0026] The end of the core wire 200 near the head of the spring 100 is provided with a small-diameter bendable section. The end of the bendable section near the head of the spring 100 is directly coaxially connected to other parts of the core wire 200 with a larger diameter. The end of the bendable section away from the head of the spring 100 is connected to other parts of the core wire 200 with a larger diameter by an inclined surface transition.

[0027] A flattened section 210 is formed in the bendable section, and the middle position of the flattened section 210 corresponds to the middle position of the bent section 110 of the spring 100. The length of the flattened section 210 is less than the length of the bent section 110. Arc-shaped surfaces 211 concave inward toward the central axis are formed on both sides of the flattened section 210, causing the thickness of the flattened section 210 to gradually decrease from both ends toward the middle. The point where the thickness of the flattened section 210 is minimum is at different distances from the two ends, and the position where the thickness of the flattened section 210 is minimum is located on a side offset from the head end of the spring 100. When the spring 100 is initially bent, the core wire 200 can bend more easily at the flattened section 210, and the spring 100 will preferentially bend at the position with the smallest thickness in the flattened section 210. When the spring 100 continues to bend, it will preferentially continue to bend at the position of the flattened section 210 near the head end of the spring 100. This makes it less likely that the head structure will extend outward and protrude when the spring 100 continues to bend, which could easily damage the internal tissues, thus improving the safety of the spring 100 when bending.

[0028] An adjusting male head 300 and an adjusting female head 400 are installed at the tail end of the spring 100. The adjusting male head 300 has a first through hole in its center for the core wire 200 to pass through. A mounting groove 320, coaxially distributed with the first through hole, is provided at one end of the adjusting male head 300. The tail end of the spring 100 is embedded in the mounting groove 320, and the spring 100 is bonded to the side wall of the mounting groove 320 with adhesive, achieving a stable connection between the spring 100 and the adjusting male head 300. A tapered cylindrical surface 310 is formed in the center of the end face of the adjusting male head 300 away from the mounting groove 320. The tapered cylindrical surface 310 forms a tapered groove with a large opening facing away from the mounting groove 320. The centerline of the tapered cylindrical surface 310 is collinear with the axis of the first through hole. A plurality of adjusting shank wings 330 are evenly arranged around the outer periphery of the end of the adjusting male head 300 near the mounting groove 320. Each adjusting shank wing 330 has an arcuate surface protruding outwards from its axis away from the adjusting male head 300. The adjusting shank wings 330 are integrally formed with the adjusting male head 300, and protrude beyond the outer periphery of the adjusting male head 300. The number of adjusting shank wings 330 is four; in other embodiments, the number may be three, five, or six.

[0029] The adjusting male head 300 has a second thread formed on its outer periphery at the end furthest from the mounting groove 320; this second thread is an internal thread. The adjusting female head 400 has a first groove 410 with a diameter matching that of the adjusting male head 300 at its midpoint on its end face near the adjusting male head 300. The inner wall of the first groove 410 has a first thread that matches the second thread; this first thread is an external thread. This allows the first adjusting male head 300 to be screwed into the first groove 410, achieving a threaded connection between the adjusting male head 300 and the adjusting female head 400.

[0030] A second groove 411 is formed on the bottom wall of the first groove 410 of the adjusting head 400. The diameter of the second groove 411 is smaller than the diameter of the first groove 410. The second groove 411 is coaxially distributed with the first groove 410. A second through hole is formed on the bottom wall of the second groove 411, which passes through the adjusting head 400 for the core wire 200 to pass through. The diameter of the second through hole is smaller than the diameter of the second groove 411.

[0031] A sandwich sleeve 500, which is annular in shape, is embedded in the second groove 411. The sandwich sleeve 500 is fixed to the side wall of the second groove 411 by adhesive. Three wedge-shaped clamping blocks 510 are evenly arranged around the end of the sandwich sleeve 500 away from the bottom wall of the second groove 411, with a gap between the three wedge-shaped clamping blocks 510. The three wedge-shaped clamping blocks 510 are integrally formed with the sandwich sleeve 500. A wedge-shaped surface 511 is formed on the outer periphery of the end of the wedge-shaped clamping block 510 away from the sandwich sleeve 500, and the wedge-shaped surface 511 is adapted to the conical cylindrical surface 310. In other embodiments, the sandwich sleeve 500 may also have two, four, or five wedge-shaped clamping blocks 510 spaced apart.

[0032] When the adjusting female head 400 is screwed tight relative to the adjusting male head 300, the adjusting female head 400 and the adjusting male head 300 move closer to each other, so that the wedge-shaped surface 511 of the wedge-shaped clamp 510 abuts against the conical cylindrical surface 310. When the adjusting female head 400 is tightened further, the conical cylindrical surface 310 abuts against the wedge-shaped surface 511, so that the inner sides of the three wedge-shaped clamps 510 clamp the core wire 200, thereby achieving relative fixation between the core wire 200 and the spring 100, and thus limiting the orientation of the head end of the spring 100, so as to facilitate further surgical operations.

[0033] Understandably, the wedge-shaped clamps 510 possess a certain degree of elasticity. When the adjusting female head 400 is loosened, causing it to move away from the adjusting male head 300, the wedge-shaped surface 511 disengages from the conical surface 310, allowing the wedge-shaped clamps 510 to return to a relaxed state. This means the three wedge-shaped clamps 510 no longer clamp the core wire 200, thus enabling the core wire 200 to push and pull relative to the spring 100. During this pushing and pulling motion of the core wire relative to the spring 100, the orientation of the spring 100's head can be adjusted, as well as the overall stiffness of the spring 100's head, to meet specific needs.

[0034] The adjusting female head 400 is provided with a first groove 410 for the adjusting male head 300 to screw into and a second groove 411 for the sandwich sleeve 500 to be embedded and installed. This allows the overall length of the adjusting male head 300 and adjusting female head 400 after assembly to be smaller, and the overall appearance of the adjusting female head 400 to be simpler and easier to operate. In other embodiments, the sandwich sleeve, wedge-shaped clamping block 510 and adjusting female head 400 can be integrally formed, reducing assembly steps.

[0035] The outer periphery of the adjusting female head 400 has obliquely distributed scratches, which form an anti-slip pattern 520 to facilitate rotation of the adjusting female head 400. A rotation indicator 530 is provided on the outer periphery of the adjusting female head 400 away from the adjusting male head 300. The rotation indicator 530 includes a double-headed arrow and the words "loose" and "tight" at the ends of the double-headed arrows. The rotation indicator 530 indicates the relationship between the rotation direction of the adjusting female head 400 and the clamping or loosening of the core wire 200 by the wedge-shaped clamp 510, allowing for quick determination of the rotation direction of the adjusting female head 400 and improving operational efficiency.

[0036] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A guide wire, characterized in that, include: spring; The core wire has one end fixedly connected to one end of the spring, and the other end extends out of the other end of the spring. An adjusting male head is fixedly installed at the end of the spring away from the end fixed to the core wire, and the adjusting male head is formed with a tapered cylindrical surface; An adjusting female head is threadedly connected to the adjusting male head. The adjusting female head has two or more wedge-shaped clamps that are adapted to and abut against the conical cylindrical surface around its axis. The core wire slides through the adjusting female head. When the adjusting female head rotates relative to the adjusting male head thread, the wedge-shaped clamps can press against or disengage from the conical cylindrical surface, so that the two or more wedge-shaped clamps can hold or release the core wire.

2. The guide wire according to claim 1, characterized in that: The adjusting female head has a first groove, and the sidewall of the first groove has a first thread. The outer side of the adjusting male head has a second thread that matches the first thread.

3. The guide wire according to claim 2, characterized in that: The bottom wall of the first groove is coaxially provided with a second groove smaller than the diameter of the first groove. A core sleeve for the core wire to slide through is fixedly installed in the second groove. Two or more wedge-shaped clamps are arranged around the core sleeve and are located in the first groove. The conical cylindrical surface is opened in the middle of the end face of the adjusting male head that is embedded in the first groove.

4. The guide wire according to claim 1, characterized in that: The adjusting male head has a mounting groove at one end for the spring end to be inserted, and the spring end is bonded and fixed to the side wall of the mounting groove.

5. The guide wire according to claim 1, characterized in that: The spring has a curved section at one end fixed to the core wire. The helical gap of the curved section is 0.23-0.27 mm. The helical gaps of the other parts of the spring, except for the curved section, are smaller than the helical gap of the curved section.

6. The guide wire according to claim 5, characterized in that: The core wire has a flattened section corresponding to the position of the bent section, and the flattened section has inwardly concave arc-shaped surfaces on both sides.

7. The guide wire according to claim 6, characterized in that: The point where the thickness of the flattened section is the smallest is offset from the end where the core wire is fixedly connected to the spring.

8. The guide wire according to claim 1, characterized in that: The outer ring of the adjusting male head is provided with multiple adjusting handles.

9. The guide wire according to claim 1, characterized in that: The outer side of the adjusting head is provided with anti-slip patterns.

10. A guide wire according to claim 1, characterized in that: The outer side of the adjusting head is provided with a rotation mark indicating the relationship between the rotation direction and the clamping and releasing of the wedge-shaped clamping block.

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