Wide-angle controllable and directional interventional guidewire

Abstract

The present invention relates to a wide-angle controllable changeable interventional guidewire, comprising an operating rod, a guidewire body and a guidewire tip, wherein the operating rod is fixedly mounted at the rear end of the guidewire body, and the guidewire tip is arranged at the front end of the guidewire body, characterized in that: the guidewire tip is connected to the front end of the guidewire body through a bending and elastic stretching section that can bend and stretch elastically; the operating rod is provided with a plurality of sliding grooves parallel to the long axis direction thereof, and a sliding operation button is slidably assembled in each sliding groove; a plurality of thin linkage wires parallel to the long axis direction thereof are buried in the guidewire body, the number of the thin linkage wires is the same as the number of the sliding operation buttons, and each thin linkage wire can move axially in the guidewire body, the rear ends of the plurality of thin linkage wires are connected to the plurality of sliding operation buttons one by one, and the front ends of the plurality of thin linkage wires pass through the bending and stretching section and are connected to the guidewire tip. The present invention has an ingenious structure, a reasonable design, is easy to operate, has a low cost, and has no potential harm to patients.

Description

Technical Field

[0001] The invention relates to a wide-angle controllable direction-changing interventional guidewire, belonging to the technical field of medical devices. Background Art

[0002] At present, the guidewire body commonly used in clinical practice is mostly composed of a soft tip, a middle section (solder joint) connecting the soft tip and the core rod, and an operating rod. According to the difference in the soft tip, it is mainly divided into two types: Core-to-tip design and Shape ribbon design. The soft tip of the Core-to-tip design is harder and has good controllability, which is suitable for passing lesions with greater resistance; while the soft tip of the Shape ribbon design is softer, usually combined with NiTi alloy inside to improve its shaping durability, and is suitable for twisted and angled lesions, but the controllability and passability are poor.

[0003] Both guidewires have their own advantages and disadvantages, but they also have one thing in common - they both require manual operation by the doctor, and all operations of the doctor are completed through the operating lever, including forward, backward, turning, and returning, etc., which can be described as "fine work". Doctors who have received good surgical operation training can successfully complete most interventional surgeries under guidewire catheters. However, a difficult problem that has always plagued all doctors is the problem of blood vessels that are at an angle of more than 90° to the direction of advance. How to smoothly make the soft tip of the guidewire bend more than 90° or even close to 180°, and retain a certain supporting force to push the catheter through such a large angle, which is a very difficult operation for most interventional doctors.

[0004] Although some scholars have proposed the use of magnetic navigation systems, that is, adding a magnetic structure to the tip of the guidewire and using the magnetic field installed outside the DSA machine to pull the guidewire to complete the large-angle return, this machine is very expensive and has high requirements for the magnetic field. If it is too weak, it will not work, and if it is too strong, it may be potentially dangerous to many patients with metal implants. Therefore, there is an urgent need for a guidewire in clinical practice that can allow most qualified interventional doctors to successfully complete large-angle (>90°) operations without requiring too much additional cost or causing potential harm to patients. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a wide-angle controllable and directional interventional guidewire with an ingenious structure and reasonable design, which is easy to operate, low in cost, and poses no potential harm to patients.

[0006] According to the present invention, a technical solution is provided: a wide-angle controllable changeable interventional guidewire, comprising an operating rod, a guidewire body and a guidewire tip, the operating rod being fixedly mounted at the rear end of the guidewire body, and the guidewire tip being arranged at the front end of the guidewire body, characterized in that: the guidewire tip is connected to the front end of the guidewire body by a bending and telescopic section that can be bent and elastically telescopic; the operating rod is provided with a plurality of sliding grooves parallel to its long axis direction, and a sliding operating button is slidably assembled in each sliding groove; a plurality of fine linkage wires parallel to its long axis direction are buried in the guidewire body, the number of the fine linkage wires is the same as the number of the sliding operating buttons, each fine linkage wire can move axially in the guidewire body, the rear ends of the plurality of fine linkage wires are connected to the plurality of sliding operating buttons one by one, and the front ends of the plurality of fine linkage wires pass through the bending and telescopic section and are connected to the guidewire tip.

[0007] As a further improvement of the present invention, the bending and telescopic section is formed by spirally winding an elastic forming wire.

[0008] As a further improvement of the present invention, the elastic forming wire is made of spring steel.

[0009] As a further improvement of the present invention, a plurality of the thin linkage wires are parallel to each other and are evenly arranged circumferentially inside the surface layer of the guide wire body.

[0010] As a further improvement of the present invention, the number of the thin linkage wires is eight.

[0011] As a further improvement of the present invention, the thin linkage wire is a metal wire that will not deform when stretched.

[0012] As a further improvement of the present invention, the tip of the guide wire is a smooth hemispherical shape.

[0013] As a further improvement of the present invention, scales are provided on the sides of the sliding groove.

[0014] As a further improvement of the present invention, the front end of the thin linkage wire is threadedly connected to the guide wire tip. By adjusting the distance that the front end of the thin linkage wire is screwed into the guide wire tip, the bending angle of the guide wire tip can be changed within 0 to 180 degrees.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1) With this wide-angle controllable changeable interventional guidewire, medical staff can drive different thin linkage wires to move by moving the sliding operating button, thereby applying push or pull force to different parts of the guidewire tip. Under the synergistic effect of the push and pull force, the bending and telescopic section is deformed and bends back toward the target branch vessel. The bending and folding angle can easily exceed 90 degrees or even bend back to nearly 180 degrees, so that the guidewire tip can enter the target branch vessel, thereby effectively solving the problem of difficulty in wide-angle guidewire tip folding operation for interventional doctors.

[0017] 2) The wide-angle controllable and directional interventional guidewire has a bending and telescopic section which is spirally wound with elastic molded wire, so that the bending and telescopic section has excellent elasticity and telescopicity and a long service life.

[0018] 3) For the wide-angle controllable and directional interventional guidewire, each sliding groove on the operating rod is provided with a scale on its side. The moving distance of the fine linkage wire can be judged by observing the scale, so as to facilitate more precise control and improve the quality of surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0020] Figure 2 for Figure 1 A magnified schematic diagram of part A in FIG.

[0021] Figure 3 for Figure 1 An enlarged schematic diagram of part B in FIG.

[0022] Figure 4 for Figure 1 CC cross-section diagram in .

[0023] Figure 5 Schematic diagram of the connection between the thin link wire and the guide wire tip in an embodiment of the present invention.

[0024] Explanation of the reference numerals: 1-operating rod, 1a-sliding groove, 2-guide wire body, 3-bent telescopic section, 4-guide wire tip, 5-thin linkage wire, 6-sliding operating button. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0026] like Figure 1 to Figure 5As shown, the embodiment discloses a wide-angle controllable change-of-direction interventional guidewire, comprising an operating rod 1, a guidewire body 2 and a guidewire tip 4, wherein the operating rod 1 is fixedly mounted at the rear end of the guidewire body 2, the guidewire tip 4 is arranged at the front end of the guidewire body 2, and the guidewire tip 4 is connected to the front end of the guidewire body 2 via a bending and telescopic section 3 that can bend and elastically stretch; the operating rod 1 is provided with eight sliding grooves 1a parallel to its long axis direction, and each sliding groove 1a is slidably equipped with a sliding operating button 6; eight thin linkage wires 5 parallel to its long axis direction are buried in the guidewire body 2, each of the thin linkage wires 5 can move axially in the guidewire body 2, the rear ends of the eight thin linkage wires 5 are connected to the eight sliding operating buttons 6 one by one, and the front ends of the eight thin linkage wires 5 pass through the bending and telescopic section 3 and are connected to the guidewire tip 4.

[0027] During specific use, the medical staff holds the operating rod 1 and inserts the guide wire body 2 into the patient's blood vessel in a conventional manner. When the branch blood vessel inside the blood vessel exceeds 90° or even approaches 180°, and manual operation by the medical staff is required, the medical staff carefully operates each sliding operating button 6, first pulling the sliding operating button 6 corresponding to the position of the target branch blood vessel proximally [generally speaking, the sliding operating button 6 closest to the target branch blood vessel], while pulling the sliding operating button 6 proximally to pull the corresponding thin linkage wire 5 proximally, the sliding operating button 6 facing away from the target branch blood vessel [generally speaking, the sliding operating button 6 closest to the target branch blood vessel] is pulled proximally. The sliding operating button 6 farthest from the target branch blood vessel, that is, the sliding operating button 6 which is 180 degrees symmetrical to the pulled sliding operating button 6, is pushed toward the distal end, thereby pushing the corresponding thin linkage wire 5 toward the distal end. Under the synergistic action of the two forces, the bending and elastic stretching section 3 which can bend and elastically stretch will be deformed and bend back toward the target branch blood vessel, and the bending and folding angle can easily exceed 90 degrees or even bend back to nearly 180 degrees, so that the guide wire tip 4 can enter the interior of the target branch blood vessel, thereby efficiently solving the problem of difficulty in folding the guide wire tip 4 at a wide angle for interventional doctors.

[0028] like Figure 1 , Figure 3 As shown, in this embodiment, the bending and telescopic section 3 is formed by spirally winding an elastic forming wire. Such a configuration can make the bending and telescopic section 3 have excellent elasticity and telescopicity, and a long service life. The material of the elastic forming wire can be selected from conventional spring steel, such as 70# steel, t9A, 65Mn, 60Si2MnA, etc.

[0029] like Figure 1 to Figure 4As shown, in this embodiment, eight thin linkage wires 5 are parallel to each other and are evenly arranged in the circumferential direction inside the surface layer of the guide wire body 2. Such an arrangement can ensure that the bending and telescopic section 3 is subjected to uniform force in multiple directions, and the bending and rebending of the bending and telescopic section 3 are symmetrically acted on by one pulling and one pushing, which is convenient and accurate to adjust, thereby facilitating the precise control of the direction of the guide wire tip 4. The thin linkage wire 5 is a metal wire that does not deform when stretched, such as 2N7wUBTR stainless steel.

[0030] like Figure 1 , Figure 3 As shown, in this embodiment, the guide wire tip 4 is a smooth hemispherical shape. This arrangement can improve the safety of the product.

[0031] like Figure 1 , Figure 2 As shown, in this embodiment, the side of the sliding groove 1a is provided with scales. In this way, medical staff can judge the moving distance of the thin linkage wire 5 by observing the scales, which is convenient for more precise control and improves the quality of surgery. Generally speaking, the minimum scale setting of 0.5-1mm can meet the requirements.

[0032] like Figure 5 As shown, in this embodiment, the front end of the thin linkage wire 5 is threadedly connected to the guide wire tip 4. By adjusting the distance of the front end of the thin linkage wire 5 screwed into the guide wire tip 4, the bending angle of the guide wire tip 4 can be changed within 0-180 degrees. This arrangement can greatly improve the application range of this product.

[0033] The above description is only a preferred embodiment of the present invention, and the above specific embodiment is not intended to limit the present invention. Various deformations and modifications may occur within the scope of the technical concept of the present invention, and any modification, modification or equivalent replacement made by a person of ordinary skill in the art based on the above description shall fall within the scope of protection of the present invention.

Claims

1. A wide-angle controllable and changeable interventional guidewire, comprising an operating rod (1), a guidewire body (2) and a guidewire tip (4), wherein the operating rod (1) is fixedly mounted at the rear end of the guidewire body (2), and the guidewire tip (4) is arranged at the front end of the guidewire body (2); a plurality of thin linkage wires (5) parallel to the long axis direction of the guidewire body (2) are embedded in the guidewire body (2), and each of the thin linkage wires (5) can move axially in the guidewire body (2); the characteristics are: The guide wire tip (4) is connected to the front end of the guide wire body (2) via a bendable and elastically extendable bending and expansion section (3), the bendable and expansion section (3) being formed by spirally winding an elastic molded wire; the operating rod (1) is provided with a plurality of sliding grooves (1a) parallel to the long axis direction thereof, each sliding groove (1a) being slidably mounted with a sliding operating button (6), the number of the thin linkage wires (5) being the same as the number of the sliding operating buttons (6), the rear ends of the plurality of thin linkage wires (5) being connected to the plurality of sliding operating buttons (6) in a one-to-one correspondence, the front ends of the plurality of thin linkage wires (5) passing through the bendable and expansion section (3) and being threadedly connected to the guide wire tip (4), and the bending and reversing angle of the guide wire tip (4) can be changed within a range of 0 to 180 degrees by adjusting the distance by which the front ends of the thin linkage wires (5) are screwed into the guide wire tip (4).

2. The wide-angle controllable and changeable interventional guidewire according to claim 1, characterized in that: The elastic forming wire is made of spring steel.

3. The wide-angle controllable and changeable interventional guidewire according to claim 1, characterized in that: The plurality of thin linkage wires (5) are mutually parallel and evenly arranged in the circumferential direction inside the surface layer of the guide wire body (2).

4. The wide-angle controllable and changeable interventional guidewire according to claim 3, characterized in that: The number of the thin linkage wires (5) is eight in total.

5. The wide-angle controllable and directional interventional guidewire according to claim 3 or 4, characterized in that: The thin linkage wire (5) is a metal wire that will not deform when stretched.

6. The wide-angle controllable and changeable interventional guidewire according to claim 1, characterized in that: The guide wire tip (4) is in a smooth hemispherical shape.

7. The wide-angle controllable and changeable interventional guidewire according to claim 1, characterized in that: Scales are provided on the sides of the sliding groove (1a).

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