A catheter guidewire kit for interventional therapy

Abstract

The present invention belongs to the technical field of medical devices, and provides a catheter guidewire kit for interventional treatment, including a guidewire and a catheter, wherein the guidewire includes a guidewire core, a guidewire vertebral body is fixedly installed at the end of the guidewire core, a spring coil sheath is sleeved on the guidewire vertebral body, a cutting head is fixedly installed at the end of the spring coil sheath, and the guidewire core and the catheter are coaxially connected through a coaxial connector, a coaxial fixing piece is fixedly installed on one side of the coaxial connector, and the coaxial connector and the coaxial fixing piece are coaxially connected. A catheter guidewire kit for interventional treatment of the present invention improves the penetration and cutting ability of the guidewire tip for thrombus blood clots by fixing a cutting head at the end of the spring coil sheath; the guidewire core and the catheter are connected by a coaxial connector to improve the coaxial accuracy between the catheter and the guidewire core during installation, and the position of the guidewire core is fixed by a coaxial fixing piece to improve the coaxial accuracy between the catheter and the guidewire core during use.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a catheter guidewire kit for interventional therapy. Background Art

[0002] During interventional surgery, the catheter enters the blood vessel under the action of the guide wire and removes the blood clot to achieve the purpose of treatment.

[0003] The existing guidewire tip is fixedly installed with a tip cap, and the outer surface of the tip cap is spherical, which has the disadvantages of poor penetration and cutting capabilities for blood clots. In addition, during the installation of the guidewire and the catheter, it is often inconvenient to measure the distance between the guidewire and the catheter, and there is a lack of position reference parts to correct the position of the guidewire, resulting in a deviation between the center line of the guidewire and the center line of the catheter after installation, affecting the coaxiality between the guidewire and the catheter, thereby affecting the use effect. Summary of the invention

[0004] In view of the defects in the prior art, the present invention provides a catheter guidewire kit for interventional treatment, which improves the penetration and cutting ability of the guidewire tip on thrombus blood clots and improves the coaxial accuracy between the catheter and the guidewire core during installation and use.

[0005] In order to solve the above technical problems, the present invention proposes the following technical solutions:

[0006] A catheter guidewire kit for interventional treatment comprises a guidewire and a catheter. The guidewire comprises a guidewire core, a guidewire vertebra is fixedly mounted on the end of the guidewire core, a spring coil sheath is sleeved on the guidewire vertebra, a cutting head is fixedly mounted on the end of the spring coil sheath, and the guidewire core and the catheter are coaxially connected via a coaxial connector.

[0007] Furthermore, the cutting head is a cutting blade, the cutting blade is fixedly connected to the spring coil sheath, and the cutting blade is in the shape of a scraper.

[0008] Furthermore, the cutting head is a cutting blade, which is fixedly connected to the spring coil sheath. The cross-section of the cutting blade is trapezoidal. The width of the cutting blade at one end away from the spring coil sheath is smaller than the width of the cutting blade at one end close to the spring coil sheath. The cutting blade at one end away from the spring coil sheath is in the shape of a cutter.

[0009] Furthermore, the number of the cutting blades is two, the two cutting blades are vertically arranged, the axis lines of the two cutting blades coincide with each other, and the two cutting blades are fixedly connected to the spring coil sheath.

[0010] Furthermore, the coaxial connector includes a first fixing ring, a plurality of clamping blocks are evenly installed on the outer side surface of the first fixing ring, a plurality of clamping grooves are evenly opened on the inner side surface of the catheter, the plurality of clamping blocks and the plurality of clamping grooves correspond one to one, the clamping grooves are adapted to the clamping blocks, and a plurality of elastic fixing members are evenly arranged on the inner side surface of the first fixing ring, and the ends of the plurality of elastic fixing members are all in contact with the guide wire core.

[0011] Furthermore, the coaxial fixing member includes a second fixing ring, which is coaxially connected to the first fixing ring, and two support plates are fixedly installed in the second fixing ring, the two support plates are symmetrically arranged, and two arc-shaped fixing plates are slidably arranged between the two support plates, the two arc-shaped fixing plates are relatively arranged, and the inner side shapes of the two arc-shaped fixing plates are adapted to the outer contour of the guide wire core, and the positions of the second fixing ring corresponding to the two arc-shaped fixing plates are threadedly connected with adjusting screws, and the ends of the adjusting screws are rotatably connected to the arc-shaped fixing plates.

[0012] Furthermore, the elastic fixing part includes a telescopic block and a compression spring. The inner side surface of the first fixing ring is provided with a plurality of grooves adapted to the telescopic block. One end of the compression spring is fixedly connected to the side wall of the groove, and the other end of the compression spring is fixedly connected to the telescopic block, and the telescopic block abuts against the guide wire core.

[0013] Furthermore, the side of the telescopic block away from the groove is arranged in an arc shape, and an arc groove is opened on the side of the telescopic block away from the groove, and the guide wire core is placed in the arc groove.

[0014] Furthermore, slide grooves are symmetrically provided on the side walls of the groove, and sliding blocks are symmetrically installed on both side surfaces of the telescopic block, and the sliding blocks are placed in the slide grooves.

[0015] Furthermore, the guide wire core, the spring coil sheath and the cutting head are all coated with silicone oil or a hydrophilic coating.

[0016] It can be seen from the above technical scheme that the beneficial effects of the present invention are as follows: by fixing a cutting head on the end of the spring coil sheath, the penetration and cutting ability of the guidewire tip on the thrombus blood clot is improved; the guidewire core and the catheter are connected by a coaxial connector, which improves the coaxial accuracy between the catheter and the guidewire core during the installation process; then, the position of the guidewire core is fixed by a coaxial fixing piece, which improves the coaxial accuracy between the catheter and the guidewire core during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0018] Figure 1 A cross-sectional view of the present invention when the cutting head is in the shape of a scraper;

[0019] Figure 2 It is a cross-sectional view of the cutting head of the present invention when the cross section is a trapezoid;

[0020] Figure 3 It is a structural schematic diagram of the coaxial connector of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure when the cutting head of the present invention is in the shape of a scraper;

[0022] Figure 5 This is a schematic diagram of the structure of a cutting head composed of a cutting blade of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of a cutting head composed of two cutting blades of the present invention;

[0024] Figure 7 It is an enlarged view of A of the present invention;

[0025] Figure 8 It is a schematic structural diagram of the coaxial fixing member of the present invention.

[0026] Reference numerals:

[0027] 1-catheter; 2-guidewire core; 3-guidewire cone; 4-spring coil sheath; 5-cutting disc; 6-silicone oil or hydrophilic coating;

[0028] 11-card slot; 12-first fixing ring; 13-card block; 14-groove; 15-compression spring; 16-telescopic block; 17-second fixing ring; 18-support plate; 19-arc-shaped fixing sheet;

[0029] 141 - slide groove; 161 - slider; 162 - arc groove; 171 - adjusting screw. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0031] See also Figure 1-Figure 8 As shown, the present embodiment provides a catheter guidewire kit for interventional treatment, comprising a guidewire and a catheter 1, the guidewire comprising a guidewire core 2, a guidewire vertebral body 3 is fixedly mounted on the end of the guidewire core 2, a spring coil sheath 4 is sleeved on the guidewire vertebral body 3, a cutting head is fixedly mounted on the end of the spring coil sheath 4, and the guidewire core 2 and the catheter 1 are coaxially connected via a coaxial connector.

[0032] In actual use, a cutting head is fixedly installed at the end of the spring coil sheath 4 to improve the penetration and cutting ability of the guidewire tip on blood clots; the guidewire core 2 and the catheter 1 are connected by a coaxial connector to improve the coaxial accuracy between the catheter 1 and the guidewire core 2 during installation, and then the position of the guidewire core 2 is fixed by a coaxial fixing member to improve the coaxial accuracy between the catheter 1 and the guidewire core 2 during use.

[0033] In this embodiment, the cutting head is a cutting blade 5, which is fixedly connected to the spring coil sheath 4. The cutting blade 5 is in the shape of a spatula, which improves the penetration power of the cutting blade 5 and improves the ability to cut the entire thrombus.

[0034] In this embodiment, the cutting head is a cutting blade 5, which is fixedly connected to the spring coil sheath 4. The cross-section of the cutting blade 5 is trapezoidal. The width of the cutting blade 5 at one end away from the spring coil sheath 4 is smaller than the width of the cutting blade 5 at one end close to the spring coil sheath 4. The end of the cutting blade 5 away from the spring coil sheath 4 is in the shape of a cutter.

[0035] In actual use, the width of the cutting piece 5 at the end away from the spring coil sheath 4 is smaller than the width of the cutting piece 5 at the end close to the spring coil sheath 4, thereby improving the cutting piece 5's ability to penetrate the center of the thrombus. The end of the cutting piece 5 away from the spring coil sheath 4 is in the shape of a cutter, thereby improving the ability to cut the thrombus.

[0036] In this embodiment, the number of the cutting blades 5 is two, the two cutting blades 5 are vertically arranged, the axis lines of the two cutting blades 5 coincide with each other, and the two cutting blades 5 are fixedly connected to the spring coil sheath 4 .

[0037] In actual use, the two cutting blades 5 cooperate with each other, and when the cutting head passes through the central area of ​​the thrombus blood clot, the thrombus blood clot is effectively broken up.

[0038] In this embodiment, the coaxial connector includes a first fixing ring 12, and a plurality of blocks 13 are evenly installed on the outer side surface of the first fixing ring 12. A plurality of slots 11 are evenly opened on the inner side surface of the catheter 1. The plurality of blocks 13 correspond to the plurality of slots 11 one by one, and the slots 11 are adapted to the blocks 13. A plurality of elastic fixing members are evenly arranged on the inner side surface of the first fixing ring 12, and the ends of the plurality of elastic fixing members are all in contact with the guide wire core 2.

[0039] In actual use, the size of the first fixing ring 12 is adapted to the inner diameter of the catheter 1, and the block 13 on the first fixing ring 12 is placed in the slot 11 to achieve coaxial connection between the first fixing ring 12 and the catheter 1, and the guidewire core 2 is placed between multiple elastic fixings. Under the support of multiple elastic fixings, the center line of the guidewire core 2 coincides with the center line of the catheter 1, thereby improving the accuracy of the coaxiality between the catheter 1 and the guidewire core 2 during the installation process.

[0040] In this embodiment, the coaxial fixing member includes a second fixing ring 17, which is coaxially connected to the first fixing ring 12. Two support plates 18 are fixedly installed inside the second fixing ring 17. The two support plates 18 are symmetrically arranged. Two arc-shaped fixing plates 19 are slidably arranged between the two support plates 18. The two arc-shaped fixing plates 19 are relatively arranged. The inner side shape of the arc-shaped fixing plate 19 is adapted to the outer contour of the guide wire core 2. The positions corresponding to the second fixing ring 17 and the two arc-shaped fixing plates 19 are both threadedly connected with an adjusting screw 171, and the end of the adjusting screw 171 is rotatably connected to the arc-shaped fixing plate 19.

[0041] In actual use, after the guidewire core 2 is located at the center position of the catheter 1, the arc-shaped fixing plate 19 is pushed to move by rotating the adjusting screw 171, and the guidewire core 2 is fixed to the center position of the catheter 1 by the mutual cooperation of the two arc-shaped fixing plates 19. At this time, the inner side of the arc-shaped fixing plate 19 contacts the guidewire core 2, which can not only play the role of fixing the position of the guidewire core 2, but also does not affect the sliding of the guidewire core 2 relative to the arc-shaped fixing plate 19. The second fixing ring 17 can be placed inside the catheter 1 or outside the catheter 1. When the second fixing ring 17 is placed inside the catheter 1, a mounting hole adapted to the adjusting screw 171 is provided on the catheter 1, so that the adjusting screw 171 passes through the mounting hole and is threadedly connected to the second fixing ring 17. Support blocks are fixedly installed at both ends of the arc-shaped fixing plate 19, and placement grooves adapted to the support blocks are provided on the two support plates. During the sliding process of the arc-shaped fixing plate 19, the support blocks slide along the placement grooves to maintain the stability of the arc-shaped fixing plate 19 during the sliding process.

[0042] In this embodiment, the elastic fixing member includes a telescopic block 16 and a compression spring 15. The inner side surface of the first fixing ring 12 is provided with a plurality of grooves 14 adapted to the telescopic block 16. One end of the compression spring 15 is fixedly connected to the side wall of the groove 14, and the other end of the compression spring 15 is fixedly connected to the telescopic block 16. The telescopic block 16 abuts against the guide wire core 2.

[0043] In actual use, the guidewire core 2 is placed between multiple telescopic blocks 16. Under the support of the multiple telescopic blocks 16, the center line of the guidewire core 2 coincides with the center line of the catheter 1. When the guidewire core 2 is displaced, it can automatically return to the center position of the catheter 1 under the elastic force of the compression spring 15.

[0044] In this embodiment, the side of the telescopic block 16 away from the groove 14 is configured to be arc-shaped, and an arc groove 162 is formed on the side of the telescopic block 16 away from the groove 14 , and the guide wire core 2 is placed in the arc groove 162 .

[0045] In actual use, the arc-shaped setting of the telescopic block 16 reduces the friction force on the guide wire core 2 during movement. During the movement of the guide wire core 2, the guide wire core 2 is always placed in the arc groove 162, which facilitates positioning of the guide wire core 2.

[0046] In this embodiment, sliding grooves 141 are symmetrically formed on the side walls of the groove 14 , and sliding blocks 161 are symmetrically mounted on both side surfaces of the telescopic block 16 , and the sliding blocks 161 are placed in the sliding grooves 141 .

[0047] In actual use, during the extension and retraction of the telescopic block 16, the slider 161 moves along the slide groove 141 to improve the stability of the slider 161 during the sliding process, and the slide groove 141 and the slider 161 cooperate with each other to limit the displacement of the slider 161, thereby preventing the telescopic block 16 from detaching from the groove 14.

[0048] In this embodiment, the guidewire core 2, the spring coil sheath 4 and the cutting head are all coated with silicone oil or a hydrophilic coating 6. The provision of the silicone oil or the hydrophilic coating 6 makes the guidewire surface smoother, reduces the passing resistance of the guidewire and improves the tracking performance.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A catheter guidewire kit for interventional therapy, comprising a guidewire and a catheter (1), characterized in that: The guidewire comprises a guidewire core (2), a guidewire cone (3) is fixedly mounted on the end of the guidewire core (2), a spring coil sheath (4) is sleeved on the guidewire cone (3), a cutting head is fixedly mounted on the end of the spring coil sheath (4), the guidewire core (2) and the catheter (1) are coaxially connected via a coaxial connector, a coaxial fixing piece is fixedly mounted on one side of the coaxial connector, and the coaxial connector is coaxially connected to the coaxial fixing piece; The coaxial connector comprises a first fixing ring (12), a plurality of clamping blocks (13) are evenly mounted on the outer side surface of the first fixing ring (12), a plurality of clamping grooves (11) are evenly opened on the inner side surface of the catheter (1), the plurality of clamping blocks (13) correspond to the plurality of clamping grooves (11) one by one, the clamping grooves (11) and the clamping blocks (13) are matched, a plurality of elastic fixing members are evenly arranged on the inner side surface of the first fixing ring (12), and the ends of the plurality of elastic fixing members are all in contact with the guide wire core (2); The coaxial fixing member comprises a second fixing ring (17), the second fixing ring (17) is coaxially connected to the first fixing ring (12), two support plates (18) are fixedly installed in the second fixing ring (17), the two support plates (18) are symmetrically arranged, two arc-shaped fixing plates (19) are slidably arranged between the two support plates (18), the two arc-shaped fixing plates (19) are arranged opposite to each other, the inner side shapes of the two arc-shaped fixing plates (19) are adapted to the outer contour of the guide wire core (2), the positions of the second fixing ring (17) corresponding to the two arc-shaped fixing plates (19) are threadedly connected with adjusting screws (171), and the ends of the adjusting screws (171) are rotatably connected to the arc-shaped fixing plates (19); The elastic fixing member comprises a telescopic block (16) and a compression spring (15); the inner side surface of the first fixing ring (12) is provided with a plurality of grooves (14) adapted to the telescopic block (16); one end of the compression spring (15) is fixedly connected to the side wall of the groove (14); the other end of the compression spring (15) is fixedly connected to the telescopic block (16); and the telescopic block (16) abuts against the guide wire core (2).

2. The catheter guidewire kit for interventional therapy according to claim 1, characterized in that: The cutting head is a cutting blade (5), the cutting blade (5) is fixedly connected to the spring coil sheath (4), and the cutting blade (5) is in the shape of a scraper.

3. The catheter guidewire kit for interventional therapy according to claim 1, characterized in that: The cutting head is a cutting blade (5), which is fixedly connected to the spring coil sheath (4), has a trapezoidal cross section, has a width at one end of the cutting blade (5) away from the spring coil sheath (4) smaller than a width at one end of the cutting blade (5) close to the spring coil sheath (4), and has a cutting blade shape at one end of the cutting blade (5) away from the spring coil sheath (4).

4. The catheter guidewire kit for interventional therapy according to claim 3, characterized in that: The number of the cutting blades (5) is two, the two cutting blades (5) are vertically arranged, the axis lines of the two cutting blades (5) coincide with each other, and the two cutting blades (5) are fixedly connected to the spring coil sheath (4).

5. The catheter guidewire kit for interventional therapy according to claim 1, characterized in that: The side of the telescopic block (16) away from the groove (14) is arranged in an arc shape, and the side of the telescopic block (16) away from the groove (14) is provided with an arc groove (162), and the guide wire core (2) is placed in the arc groove (162).

6. The catheter guidewire kit for interventional therapy according to claim 1, characterized in that: The side walls of the groove (14) are symmetrically provided with sliding grooves (141), and the two side surfaces of the telescopic block (16) are symmetrically provided with sliding blocks (161), and the sliding blocks (161) are placed in the sliding grooves (141).

7. The catheter guidewire kit for interventional therapy according to any one of claims 1 to 6, characterized in that: The guide wire core (2), the spring coil sheath (4) and the cutting head are all coated with silicone oil or a hydrophilic coating (6).

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