Ligation clip
By setting a recess of the arc transition connection inside the connecting arc of the ligation clip, the problem of insufficient strength of the connecting position of the biodegradable material clamp arm is solved, and the perfect fit and high-strength closure of the ligation clip are achieved.
Patent Information
- Application Number
- CN202420607847.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-03-27
AI Technical Summary
When using biodegradable materials in existing ligation clamps, holes at the joint positions of the clamp arm will reduce strength and easily break, while no holes will lack telescopic space, resulting in poor fit of the clamp arm.
A V-shaped ligation clamp is designed, using a solid connecting arc, and a recessed portion of the arc transition connection is provided on the inside, so as to disperse the deformation stress through the smooth transition of multiple arc segments, providing sufficient expansion and contraction space. To avoid breakage and gap formation.
The perfect fit of the ligation clamp and the extrusion deformation of the material are achieved, which avoids local breakage of the material and increases the connection strength and closing force.
Smart Images
Figure CN222285550U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a ligation clamp which can be used for anastomosis and ligation of blood vessels and tissues during internal surgical operations. Background Art
[0002] CN 103356264 B discloses a ligation clamp, comprising a first arc-shaped clamp arm and a second arc-shaped clamp arm, wherein the free ends of the first arc-shaped clamp arm and the second arc-shaped clamp arm are respectively a hook and a clamp head, the first arc-shaped clamp arm has a cylindrical hook clamp body, the second arc-shaped clamp arm has two opposite clamp head clamp bodies, and a clamp body connecting arc is provided at the connection between the first arc-shaped clamp arm and the second arc-shaped clamp arm.
[0003] CN 101507646 A discloses a vascular clamp, a closing clamp, a vascular clamp mold and a manufacturing method of the vascular clamp. The vascular clamp has a V-shaped appearance and is provided with a clamp rod, a clamp hook, a clamp seat and a clamp rod seat. Two clamp rods on both sides are bent and connected. One clamp rod head is provided with a clamp hook and a clamp rod seat, and the other clamp rod head is provided with a clamp rod seat and a clamp seat matched with the clamp hook. The vascular clamp is made of elastic material. The closing clamp is provided with a closing clamp sleeve hook matched with the clamp rod seat.
[0004] CN 201167997 Y discloses a medical ligation clip, comprising a V-shaped clip body made of high molecular polymer and composed of two bifurcated bodies with a foldable middle, wherein the ends of the two bifurcated bodies of the V-shaped clip body are respectively provided with lock buckles that can be locked with each other; the locking surfaces of the two bifurcated bodies are respectively provided with locking teeth; a cavity is provided on the foldable middle body of the two bifurcated bodies; and the two bifurcated bodies are each made into the same or similar small arc shape.
[0005] The connection positions of the two clamp arms of the above-mentioned existing ligation clamp are both provided with crescent-shaped holes for improving the resilience of the connection positions so that the clamp arms of the ligation clamp are normally in an elastically open state, making it easier for the ligation forceps to clamp the ligation clamp for surgical operations.
[0006] However, with the improvement of materials, ligation clips have gradually begun to be made of biodegradable materials. For example, CN103549985 B discloses an absorbable ligation clip. The ligation clip of the prior art is made of biodegradable materials. After the ligation clip is implanted in the patient's body, it can gradually break and degrade after a period of time, and finally be absorbed by the human body, so that no physical residue is formed in the patient's body. If a hole is set at the connection position of the clamp arm of the ligation clip made of biodegradable material, the strength of the connection position will be greatly reduced, making the connection position very easy to break. If the hole is directly eliminated, the material at the connection position will hinder the fitting of the clamp arm due to the lack of expansion space. Summary of the invention
[0007] The technical problem to be solved by the utility model is to provide a ligation clip to reduce or avoid the above-mentioned problems.
[0008] In order to solve the above technical problems, the utility model proposes a ligation clamp, comprising a first arc-shaped clamp arm and a second arc-shaped clamp arm with a V-shaped structure, the free ends of the first arc-shaped clamp arm and the second arc-shaped clamp arm are respectively a hook and a clamp head, and the connection between the first arc-shaped clamp arm and the second arc-shaped clamp arm is provided with a connecting arc, wherein the connecting arc is in a solid shape, and a recessed portion formed by a transition connection of the arc is arranged on the inner side of the connecting arc, and the recessed portion is formed by connecting a first arc segment, a second arc segment, a third arc segment, a fourth arc segment and a fifth arc segment, wherein the first arc segment extends from the inner side of the hook to the outer side of the first arc-shaped clamp arm, the second arc segment extends from the inner side of the clamp head to the outer side of the second arc-shaped clamp arm, the third arc segment and the fourth arc segment extend along the first arc segment and the second arc segment to the middle of the first arc-shaped clamp arm and the second arc-shaped clamp arm respectively, and the fifth arc segment smoothly connects the third arc segment and the fourth arc segment together.
[0009] Preferably, the first arc-shaped clamp arm has a cylindrical hook clamping body at one end close to the hook, and the second arc-shaped clamp arm has two opposite clamping head clamping bodies at one end close to the clamping head.
[0010] Preferably, a guide groove facing the hook is provided between the two chuck clamping bodies, and a guide slope is provided on the outer side of the hook.
[0011] Preferably, the top of the guide slope forms a converging point where the back is narrowed.
[0012] Preferably, the inner bottom of the hook has a concave portion that snaps into place with the highest point of the bottom of the guide groove.
[0013] Preferably, the clamping head has a first clamping head plane and a second clamping head plane on a side facing away from the clamping hook, and the inner side of the clamping hook has a clamping hook plane that can be matched with the second clamping head plane.
[0014] The acute angle formed between the first chuck plane and the second chuck plane is 5-8 degrees.
[0015] The ligation clamp of the utility model is provided with arc segments connected by arc transition, so that a recessed portion is formed on the inner side of the connecting arc when closed, which provides sufficient expansion and contraction space for the extrusion and deformation of the material, so that the two arc-shaped clamp arms can be perfectly fitted without forming a gap, and the arc transition of each arc segment disperses the stress of the connecting arc deformation, thereby avoiding local fracture when the material is extruded. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The following drawings are only intended to illustrate and explain the present application, and do not limit the scope of the present invention.
[0017] Figure 1 Shown is a three-dimensional structural schematic diagram of a ligation clip according to a specific embodiment of the utility model.
[0018] Figure 2 Shown is a side schematic diagram of a ligation clip according to another specific embodiment of the utility model.
[0019] Figure 3 Shown is a schematic diagram of a cross section of the ligation clip of the present invention in a closed state. DETAILED DESCRIPTION
[0020] In order to have a clearer understanding of the technical features, purpose and effects of the utility model, the specific implementation of the utility model is now described with reference to the accompanying drawings, wherein the same components are marked with the same reference numerals.
[0021] Figure 1 The three-dimensional structure diagram of a ligation clamp according to a specific embodiment of the utility model is shown. As shown in the figure, the ligation clamp of the utility model comprises a first arc-shaped clamp arm 11 and a second arc-shaped clamp arm 12 in a V-shaped structure. The free ends of the first arc-shaped clamp arm 11 and the second arc-shaped clamp arm 12 are respectively a hook 13 and a clamp head 14. The connection between the first arc-shaped clamp arm 11 and the second arc-shaped clamp arm 12 has a connecting arc 2.
[0022] Different from the prior art, the connecting arc 2 of the present invention is not provided with a crescent-shaped hole, and the connecting arc 2 is solid, so that the structural strength of the material is not weakened and the problem of easy breakage can be avoided.
[0023] Furthermore, in order to avoid the problem of lack of deformation and expansion space due to lack of holes, the utility model is provided with a recessed portion formed by arc transition connection on the inner side of the connecting arc 2, and the recessed portion is formed by connecting the first arc segment 21, the second arc segment 22, the third arc segment 23, the fourth arc segment 24 and the fifth arc segment 25, wherein the first arc segment 21 extends from the inner side of the hook 13 to the outer side of the first arc-shaped clamping arm 11, the second arc segment 22 extends from the inner side of the clamping head 14 to the outer side of the second arc-shaped clamping arm 12, the third arc segment 23 and the fourth arc segment 24 extend along the first arc segment 21 and the second arc segment 22 to the middle of the first arc-shaped clamping arm 11 and the second arc segment 12 respectively, and the fifth arc segment 25 smoothly connects the third arc segment 23 and the fourth arc segment 24 together, as shown in FIG. Figure 2-3 As shown. Figure 3 In the cross-sectional view shown, in order to clearly show the details of each structure, no hatching is shown. Figure 3It can be seen that the outward extension of the first arc segment 21 and the second arc segment 22 provides conditions for forming a recessed portion. After the third arc segment 23 and the fourth arc segment 24 extend and transition to the middle, they are closed by the fifth arc segment 25. The arc transition of each arc segment disperses the stress of the deformation of the connecting arc 2 to prevent local fracture when the material is extruded.
[0024] When the two arc-shaped clamp arms are close together, Figure 3 As shown, since the first arc segment 21, the second arc segment 22, the third arc segment 23, the fourth arc segment 24 and the fifth arc segment 25 are provided with arc transition connections, a recessed portion is formed on the inner side of the connecting arc 2 when the ligation clamp is closed, thereby providing sufficient expansion and contraction space for the extrusion and deformation of the material, and the two arc-shaped clamp arms can be perfectly fitted without forming a gap, while having the ability to disperse stress.
[0025] Furthermore, in order to prevent the ligation clamp from being loosely clamped when closed, the first arc-shaped clamp arm 11 and the second arc-shaped clamp arm 12 have two rows of staggered anti-slip teeth 15 on the opposite inner sides.
[0026] Furthermore, as shown in the figure, the first arc-shaped clamp arm 11 has a cylindrical hook clamping body 17 at one end close to the hook 13, and the second arc-shaped clamp arm 12 has two opposing clamping head clamping bodies 16 at one end close to the clamping head 14, and a guide groove 18 facing the hook is provided between the two clamping head clamping bodies 16, and the outer side of the hook 13 has a guide slope 19.
[0027] When the ligation clamp is closed, an external force is applied from the outside to the inside of the two arc-shaped clamp arms 11 and 12, so that the hook 13 and the clamp head 14 approach each other, and the guide slope 19 on the outside of the hook 13 slides along the guide groove 18 on the inside of the clamp head 14, and finally the hook 13 is clamped on the clamp head 14.
[0028] In the prior art CN 103356264 B, the top of the guide slope 19 is formed as a narrow and long ridge. When the guide slope 19 slides along the guide groove 18, if the ridge of the guide slope 19 is too narrow, the guide slope 19 is easy to slip out of the guide groove 18, and if the ridge of the guide slope 19 is too wide, the guide slope 19 is not easy to get stuck in the guide groove 18. Therefore, in a specific embodiment of the present application, as shown in the figure, the utility model forms a ridge-narrowing confluence point 191 at the top of the guide slope 19. At the location of the confluence point 191, the width of the ridge of the guide slope 19 is almost zero, so that the guide slope 19 can be easily stuck in the guide groove 18 from the location of the ridge confluence point 191. Except for the ridge confluence point 191, the ridge width of the guide slope 19 can maintain a width that is compatible with the matching of the guide groove 18, so that the guide slope 19 is not easy to slip out of the guide groove 18.
[0029] Furthermore, in order to provide a better closing force and make the closure of the ligation clip easier and more reliable, the side of the clamp head 14 away from the hook 13 has a first clamp head plane 141 and a second clamp head plane 142, and the inner side of the hook 13 has a hook plane 131 that can fit with the second clamp head plane 142. When the clamp head 14 and the hook 13 are clamped together, the hook plane 131 on the inner side of the hook 13 can slide along the first clamp head plane 141 on the outer side of the clamp head 14, and finally fit with the second clamp head plane 142. Among them, the acute angle formed between the first clamp head plane 141 and the second clamp head plane 142 is 5-8 degrees, which is very small, so the hook plane 131 can easily slide from the first clamp head plane 141 to the second clamp head plane 142. In addition, the turning setting of the first clamp head plane 141 and the second clamp head plane 142 reduces the contact area of the hook plane 131 when sliding, and the ligation clip will be easier to close.
[0030] In another specific embodiment, the inner bottom of the hook 13 has a concave portion 20 that snaps into place with the highest point 30 at the bottom of the guide groove 18. When the clamp 14 is clamped to the inner side of the hook 13, the top portion (highest point 30) of the bottom of the groove 18 of the clamp 14 located in the middle of the clamp clamping body 16 can slide completely into the concave portion 20, so that the clamp 14 can be firmly clamped in the concave portion 20. The two clamp clamping bodies 16 of the clamp 14 clamp the outer side of the hook 13, and the clamp 14 cannot swing left and right.
[0031] Those skilled in the art should understand that although the present invention is described in the form of multiple embodiments, not every embodiment contains only one independent technical solution. Such description in the specification is only for the sake of clarity. Those skilled in the art should understand the specification as a whole and regard the technical solutions involved in each embodiment as being able to be combined into different embodiments to understand the scope of protection of the present invention.
[0032] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any technician in the field without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.
Claims
1. A ligation clamp, comprising a first arc-shaped clamp arm and a second arc-shaped clamp arm in a V-shaped structure, wherein the free ends of the first arc-shaped clamp arm and the second arc-shaped clamp arm are respectively a hook and a clamp head, and the connection between the first arc-shaped clamp arm and the second arc-shaped clamp arm has a connecting arc, characterized in that: The connecting arc is in a solid shape, and a recessed portion formed by an arc transition connection is arranged on the inner side of the connecting arc, and the recessed portion is formed by connecting a first arc segment, a second arc segment, a third arc segment, a fourth arc segment and a fifth arc segment, wherein the first arc segment extends from the inner side of the hook to the outer side of the first arc-shaped clamp arm, the second arc segment extends from the inner side of the clamp head to the outer side of the second arc-shaped clamp arm, the third arc segment and the fourth arc segment extend along the first arc segment and the second arc segment to the middle of the first arc-shaped clamp arm and the second arc-shaped clamp arm respectively, and the fifth arc segment smoothly connects the third arc segment and the fourth arc segment together.
2. The ligation clip according to claim 1, characterized in that: The first arc-shaped clamp arm has a cylindrical clamping hook holding body at one end close to the clamping hook, and the second arc-shaped clamp arm has two opposite clamping head holding bodies at one end close to the clamping head.
3. The ligation clip according to claim 2, characterized in that: A guide groove facing the hook is provided between the two clamping bodies, and a guide slope is provided on the outer side of the hook.
4. The ligation clip according to claim 3, characterized in that: The top of the guide slope forms a converging point where the back is narrowed.
5. The ligation clip according to claim 3, characterized in that: The inner bottom of the hook has a concave portion which is snap-fitted with the highest point of the bottom of the guide groove.
6. The ligation clip according to any one of claims 1 to 5, characterized in that: The side of the clamp head facing away from the clamp hook has a first clamp head plane and a second clamp head plane, and the inner side of the clamp hook has a clamp hook plane that can be matched with the second clamp head plane.
7. The ligation clip according to claim 6, characterized in that: The acute angle formed between the first chuck plane and the second chuck plane is 5-8 degrees.