Fibrous ring stitching instrument capable of preventing stitching needle from being blocked

Abstract

The utility model relates to the technical field of medical instruments, in particular to a fibrous ring stitching instrument capable of preventing a stitching needle from being clamped, which comprises a stitching instrument main body with a needle tube and a stitching needle, the stitching needle can be pushed out and withdrawn inside and outside the needle tube, and a needle hole for a guide wire to pass through is arranged at the head of the stitching needle. The suture needle is characterized in that a sinking groove which is formed in the length direction of the suture needle and extends towards the needle point of the suture needle is formed in an orifice of the needle hole. The sinking groove extending in the length direction of the suture needle is formed in the hole opening of the needle hole close to the needle head side, and therefore the problem that the suture needle is clamped or a guide wire is broken by a needle tube and then falls off is solved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a fiber ring suture device that prevents suture needle jamming. Background Technology

[0002] In endoscopic discectomy for herniated discs, the annulus fibrosus needs to be sutured. This is typically done using an annulus fibrosus suture device within a narrow channel. However, current suture devices lack a groove on the needle to accommodate the guidewire. During the retraction of the needle after the guidewire is inserted, the very small gap between the needle and the needle tube, along with the resistance from the needle tube during retraction, forces the guidewire to fold towards the needle tip. This increases the overall outer diameter of the needle with the guidewire, leading to jamming or breakage of the guidewire during retraction. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing products and to propose a fiber ring suture device that prevents the suture needle from getting stuck during the needle tube retraction process after the suture needle is equipped with a guide wire.

[0004] To address the technical problem of easily retracting a guide wire suture needle into the needle tube, this invention utilizes an existing circular needle suture device by creating a recessed groove at least partially accommodating the guide wire on the needle hole opening near the needle tip. The specific technical solution is as follows: A circular needle suture device for preventing needle jamming includes a suture device body with a needle tube and a suture needle. The suture needle can be extended and retracted inside and outside the needle tube. The head of the suture needle has a needle hole for the guide wire. A recessed groove is provided at the opening of the needle hole, extending along the length of the suture needle and towards its tip. The depth of the recessed groove is h, the diameter of the guide wire is d, and the gap between the suture needle and the needle tube is δ. The depth h of the recessed groove satisfies: dh ≤ δ.

[0005] The working principle of this fiber loop suture device, which prevents the suture needle from getting stuck or the guide wire from being broken by the needle tube, is as follows: After the guide wire is inserted into the needle hole of the suture needle with push-out and retraction functions, the suture needle, carrying the guide wire, is retracted into the needle tube. During this process, due to the small gap between the suture needle and the needle tube, and the compression of the needle tube, the guide wire is forced to fold towards the needle tip, so that at least part of the guide wire is accommodated in the groove of the suture needle, and the overall increased outer diameter of the suture needle with the guide wire is less than or equal to the gap between the suture needle and the needle tube. Therefore, by providing a groove at least partially accommodating the guide wire at the opening of the suture needle hole near the needle tip, the problem of the suture needle getting stuck or the guide wire being broken by the needle tube and thus fraying can be solved.

[0006] In a preferred embodiment, the bottom of the settling tank is a concave arc surface.

[0007] This utility model discloses a fiber ring suture device for preventing needle jamming, which has the following beneficial effects: by providing a recessed groove extending along the length of the suture needle on the needle hole near the needle tip, and the overall increased outer diameter of the suture needle with guide wire is less than or equal to the gap between the suture needle and the needle tube, at least part of the guide wire is accommodated in the recessed groove of the suture needle during the retraction of the suture needle with guide wire into the needle tube, thereby solving the problem of needle jamming or guide wire breakage due to needle tube jamming. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the fiber ring suture device of the present invention that prevents the suture needle from getting stuck;

[0009] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0010] Figure 3 for Figure 1 A top view of the suture device when the suture needle and guide wire are retracted into the needle tube;

[0011] Figure 4 for Figure 3 Enlarged section view at point B;

[0012] In the diagram, 1-the main body of the suture device, 2-the suture needle, 21-the needle hole, 22-the sinker, 3-the needle tube, and 4-the guide wire. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The present invention utilizes an existing fiber loop suture device by adding a groove at the needle hole of the suture needle.

[0014] like Figures 1-2 As shown, this utility model proposes a fiber loop suture device with anti-needle jamming function. It includes a suture device body 1, a suture needle 2 and a needle tube 3 disposed on the suture device body 1. The suture needle 2 can be extended and retracted inside and outside the needle tube 3 to perform suturing operations. A needle hole 21 for threading a guide wire is provided at the head of the suture needle 2. To overcome the problems of the suture needle 2 with guide wire 4 jamming or the guide wire 4 being broken by the needle tube 3 in the prior art, this utility model designs a groove 22 at the opening of the needle hole 21 to accommodate at least part of the guide wire 4. The groove 22 is arranged along the length of the suture needle 2 and extends towards the tip of the suture needle 2.

[0015] Specifically, such as Figures 3-4As shown, when the suture needle 2 is inserted into the guide wire 4 and the needle tube 3 is about to be retracted, due to the small gap between the suture needle and the needle tube, and the squeezing effect of the needle tube 3, the guide wire 4 folds towards the needle tip of the suture needle 2, causing the guide wire 4 to enter the recess 22. Figure 3 As shown in the cross-sectional view, the depth of the groove 22 is h, the diameter of the guide wire is d, and the gap between the suture needle 2 and the needle tube 3 is δ. The depth h of the groove 22 satisfies: dh ≤ δ. If the groove is relatively deep, the guide wire 4 is completely contained within the groove 22 in the radial direction, at which point dh = 0, satisfying dh ≤ δ, and the suture needle 2 can be easily retracted into the needle tube 3. If the groove 22 is relatively shallow, the guide wire 4 is partially contained within the groove 22 in the radial direction, and dh ≤ δ, and the suture needle 2 can also be easily retracted into the needle tube 3. This solves the problem of the suture needle 2 getting stuck or the guide wire 4 being broken by the needle tube 3 and detaching.

[0016] Preferably, the bottom of the sink 22 is designed as a concave arc, which helps to better accommodate the guide wire.

[0017] In practice, the doctor can control the extension and retraction of the suture needle 2 through the main body 1 of the suture device. When the suture needle 2, carrying the guide wire 4, passes through the annulus fibrosus and needs to be retracted, the design of the groove 22 ensures that the suture needle 2 with the guide wire can be smoothly retracted into the needle tube 3 without jamming or the guide wire being broken.

[0018] In summary, by designing a groove 22 on the opening of the needle hole 21 of the suture needle 2, this utility model effectively solves the problem of suture needle jamming or guide wire being broken by the needle tube in the prior art, thereby improving the reliability and safety of the fiber ring suture device.

[0019] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fiber ring suture device for preventing needle jamming, comprising: A suture device body having a needle tube and a suture needle, the suture needle being able to be extended and retracted inside and outside the needle tube, the head of the suture needle having a needle hole for passing a guide wire, characterized in that: a groove is provided on the opening of the needle hole along the length direction of the suture needle and extending towards the tip of the suture needle, the depth of the groove being h, the diameter of the guide wire being d, the gap between the suture needle and the needle tube being δ, and the depth h of the groove satisfying: dh ≤ δ.

2. The fiber ring suture device according to claim 1, characterized in that: The bottom of the settling tank is a concave arc surface.

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