A surgical fastener

Abstract

This utility model discloses a surgical fastener in the field of medical device technology, comprising a head and claws. The head has a cylindrical structure with a helical groove on its outer side wall. A non-circular hole is axially penetrating the circular surface of the head. The claws include at least two helical lines that are rotationally symmetrical about the central axis of the head. The reference line of each helical line passes through the central axis of the head and is perpendicular to the bottom surface of the head. One end of each helical line is connected to the circular surface of the head, and the other end is provided with a sharp point. This utility model has a rotationally symmetrical helical claw structure, which can be applied to patches with different mesh sizes. When fixing patches, it easily "holds" the patch tissue without expanding the pores of the patch itself, resulting in high fixation effectiveness. Furthermore, the small contact area between the front end of the surgical fastener and the patch reduces the risk of damaging the patch tissue when passing through it, thus improving surgical safety.

Description

Technical Field

[0001] This utility model relates to a surgical fastener and belongs to the field of medical device technology. Background Technology

[0002] Laparoscopic inguinal hernia repair (LIHR) is a minimally invasive procedure that results in significantly less postoperative chronic pain and recurrence compared to open surgery. However, LIHR involves limited operating space, and most surgeons opt for "staples" to fix the mesh in the appropriate position, reducing surgical time and risks, compared to traditional suture fixation. Therefore, the structure of the staples themselves determines their fixation performance and compatibility with meshes from different tissues, ultimately affecting the outcome of the hernia repair surgery.

[0003] Over the years, the medical device market has seen the emergence of numerous fixation devices that incorporate sutures, with varying suture structures. In practice, threaded sutures pose a risk of cutting the monofilaments / yarns of the patch during rapid self-tapping insertion, damaging the patch's structure, enlarging the gaps at the suture joint, and causing the patch to detach from the suture. Furthermore, the limited diameter of the suture head of such threaded sutures, coupled with the elasticity or large mesh size of the patch, allows the patch to easily escape through the mesh, reducing fixation effectiveness and increasing postoperative recurrence rates. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a surgical fastener that has the advantages of strong applicability, causes little damage to the patch tissue during fixation, and is not easy to detach from the mesh.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] In a first aspect, this utility model provides a surgical fastener, including a head and a claw. The head is a cylindrical structure with a spiral groove on its outer side wall. A non-circular hole is provided through the circular surface of the head along the axial direction. The claw includes at least two helical lines that are rotationally symmetrical about the central axis of the head. The reference line of each helical line passes through the central axis of the head and is perpendicular to the bottom surface of the head. One end of each helical line is connected to the circular surface of the head, and the other end is provided with a sharp part.

[0007] Furthermore, the pointed part is a bevel, and the plane containing the bevel forms an acute angle of no more than 60° with the plane containing the bottom surface of the head.

[0008] Furthermore, the shape of the hole is approximately elliptical.

[0009] Furthermore, the head has a thickness of 1-2 mm and a diameter of 4-5.5 mm.

[0010] Furthermore, the head and claws are integrally molded structures.

[0011] Furthermore, the surgical fastener is made of a polymeric material, including polyetheretherketone, polylactide, polylactide copolymer, polylactide-glycolic acid copolymer, polydioxanone, and polydioxanone-lactide copolymer.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0013] I. The surgical fastener of this utility model has a rotationally symmetrical spiral claw structure, which can be applied to patches with different mesh sizes. When fixing the patch, it can easily "hold" the patch tissue without expanding the pores of the patch itself, resulting in high fixation effectiveness.

[0014] Second, the surgical fastener of this utility model has a small contact area between the front end and the patch, which can reduce the risk of damaging the patch tissue when passing through the patch, and greatly reduce the risk of damaging the patch when rotating and fixing it, thus improving the safety of the operation.

[0015] Third, the surgical fastener of this utility model has a non-circular hole in the middle of its head, which makes it easy to use the application device to rotate in reverse, thereby removing the unsecured surgical fastener and re-secure it, which is beneficial for surgical adjustment and easy to operate. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 A three-dimensional schematic diagram of a surgical fastener provided for an embodiment of this utility model;

[0018] Figure 2 A side view of a surgical fastener provided for an embodiment of this utility model;

[0019] Figure 3 A top view of a surgical fastener provided for an embodiment of this utility model;

[0020] Figure 4 A plan view of a surgical fastener application instrument after removing its outer shell, provided for an embodiment of this utility model;

[0021] Figure 5A cross-sectional view of a surgical fastener application instrument with a surgical fastener mounted at the distal end, provided for an embodiment of this utility model.

[0022] In the diagram: 100, Surgical fastener; 110, Head; 120, Claw; 111, Helical groove; 112, Hole; 121a, Helical body one; 121b, Helical body two; 122a, Inclined surface one; 122b, Inclined surface two; 200, Fastener loading kit; 210, Loading tube; 211, Outer tube; 212, Lead spring; 220, Drive rod; 221, Connector; 222, Drive shaft; 300, Handle; 310, Housing; 311, Positioning hole; 312, Positioning pin; 320, Trigger; 321, Outer chamfer; 322, Rotary shaft hole; 323, Tension spring hook; 330, Small compression spring; 340, Large compression spring; 350, Screw; 360, Square slider; 370, Trigger tension spring. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0024] The following detailed description is exemplary and intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this invention.

[0025] Example:

[0026] Please see the appendix Figure 1-3 This embodiment provides a surgical fastener 100, including a head 110 and a claw 120. The head 110 has a helical groove 111 on its side for engaging with a lead spring 212 in a fastener loading kit 200. The head 110 also has an approximately elliptical hole 112 in its center for engaging with a drive shaft 222 in the fastener loading kit 200. The claw 120 has two symmetrical helical bodies 121a and 121b, connected to the bottom surface of the head 110. The reference line of the helix of the helical bodies passes through the center of the head and is perpendicular to the plane containing the bottom surface of the head. The front ends of the helical bodies have sharp bevels 122a and 122b, with the acute angle between the plane containing the bevels and the plane containing the head being 30°.

[0027] Please see the appendix Figure 4-5This type of surgical fastener 100 needs to be used with an application instrument, which includes a fastener loading kit 200 and a handle 300. The fastener loading kit 200 includes a loading tube 210 and a drive rod 220. The loading tube 210 includes an outer tube 211 and a guide spring 212 fixed inside the outer tube 211. The drive rod 220 includes a connector 221 and a drive shaft 222. One end of the drive shaft 222 passes through the outer tube 211 and the guide spring 212, and the other end is coaxially connected to the connector 221. In use, multiple surgical fasteners 100 are installed inside the outer tube 211 and sequentially sleeved on the drive shaft 222, with the helical groove 111 engaging with the guide spring 212. The handle 300 includes a housing 310, a trigger 320, a small compression spring 330, a large compression spring 340, a screw 350, a square slider 360, and a trigger tension spring 370. The housing 310 has a positioning hole 311 and a positioning post 312. The trigger 320 has an outer chamfer 321, a pivot hole 322, and a tension spring hook 323. The housing 310 is assembled and fixed through the positioning hole 311 and is fixedly connected to the outer tube 211. The trigger 320 is rotatably connected to the housing 310 through the pivot hole 322. The tension spring hook 323 located inside the housing 310 and the positioning post 312 are connected by the trigger tension spring. A small compression spring 330 is sleeved on the drive shaft 222 outside the outer tube 211, and its two ends abut against the outer tube 211 and the connector 221 respectively. A screw 350 is installed inside the housing 310 and can rotate axially. The screw 350 and the drive shaft 222 are coaxially connected through the connector 221. A square slider 360 is spirally connected to the screw 350. A large compression spring 340 is sleeved on the screw 350, and its two ends abut against the connector 221 and the square slider 360 respectively. The side of the square slider 360 away from the large compression spring 340 abuts against the upper end of the trigger 320.

[0028] When the user presses trigger 320, the square slider 360 moves to the left, causing the screw 350 to rotate. Through the transmission of connector 221, the drive rod 220 rotates with the screw 350. Since the cross-sectional shape of the drive shaft 222 is similar to the shape of the hole 112, the head 110 of the surgical fastener 100, after receiving the torque transmitted by the drive shaft 222, rotates forward along the inner wall of the outer tube 211 within the guide spring 212. Finally, the surgical fastener 100 rotates completely out of the guide spring 212, releasing the surgical fastener 100 and securing the patch to the soft tissue. Afterwards, under the action of the large compression spring 340 and trigger spring 370, the square slider 360 and trigger 320 return to their original positions, ready to fire the next surgical fastener 100.

[0029] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the above-disclosed embodiments are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A surgical fastener, characterized in that, The device includes a head (110) and a claw (120). The head (110) is a cylindrical structure and has a spiral groove (111) on its outer side wall. A non-circular hole (112) is axially penetrating the circular surface of the head (110). The claw (120) includes at least two helical lines that are rotationally symmetrical about the central axis of the head (110). The reference line of each helical line passes through the central axis of the head (110) and is perpendicular to the bottom surface of the head (110). One end of each helical line is connected to the circular surface of the head (110), and the other end is provided with a sharp part.

2. The surgical fastener according to claim 1, characterized in that, The pointed part is a slope, and the plane on which the slope is located forms an acute angle of no more than 60° with the plane on which the bottom surface of the head (110) is located.

3. The surgical fastener according to claim 1, characterized in that, The hole (112) is elliptical in shape.

4. The surgical fastener according to claim 1, characterized in that, The head (110) has a thickness of 1-2 mm and a diameter of 4-5.5 mm.

5. The surgical fastener according to claim 1, characterized in that, The head (110) and claws (120) are integrally formed.

6. The surgical fastener according to claim 1, characterized in that, The surgical fastener is made of a polymer material, including polyetheretherketone, polylactide, polylactide copolymer, polylactide-glycolic acid copolymer, polydioxanone, and polydioxanone-lactide copolymer.

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