Absorbable ligation clamp reliable in clamping and closing

Abstract

The utility model discloses an absorbable ligation clamp reliable in clamping and closing, and belongs to the field of medical instruments. The absorbable ligation clamp reliable in clamping and closing comprises a first clamping arm and a second clamping arm, the near ends of the first clamping arm and the second clamping arm are connected through a connecting part, and the far end of the first clamping arm and the far end of the second clamping arm are provided with a locking structure used for closing the ligation clamp and a positioning structure used for being matched with a clip applier respectively. The opposite inner side clamping faces of the first clamping arm and the second clamping arm are arc-shaped convex faces protruding inwards, and the outer side faces, opposite to the corresponding inner side clamping faces, of the first clamping arm and the second clamping arm are arc-shaped convex faces protruding outwards. The outer side surfaces of the clamping arms of the ligation clamp adopt the arc-shaped convex surface design, and the outer sides of the clamping arms are arched outwards, so that the overall structural strength of the clamping arms can be improved, and the closing force of the ligation clamp is improved; the arc-shaped convex surfaces can be in contact with the bottom walls of the accommodating grooves of the forceps head arms in the clamping and closing process to reduce deformation of the clamping arms, so that the problem that the ligation clip cannot be closed due to large deformation of the clamping arms is solved, meanwhile, the percussion force of the clip applier can be improved, the strength of the clamping arms during closing is ensured, ligation of blood vessels and body cavity tissues is more reliable, and the ligation efficiency is improved. And the bleeding and leakage phenomena are avoided.

Description

Technical Field

[0001] The utility model relates to a ligating clip, and more specifically to an absorbable ligating clip with reliable clamping. Background Art

[0002] Ligating clips are widely used for ligating and closing blood vessels and body cavity tissues during human surgical operations. Clinicians need to use ligating clips that match the sizes of blood vessels and body cavity tissues for ligation so as to completely ligate blood vessels or body cavity tissues.

[0003] As Figure 1 shown, the existing ligating clip has two clamping arms (the first clamping arm 1 and the second clamping arm 2). The tails of the two clamping arms are connected by a connecting part 3 to form a V-shaped structure. The distal end of one clamping arm is provided with a hook part 5, and the distal end of the other clamping arm is provided with a fastening part 6 that can be locked together with the hook part 5. Positioning posts 4 for cooperating with a clip applicator are also provided at the distal ends of the two clamping arms. The inner side surfaces of the two clamping arms facing each other form an inner clamping surface 7. To ensure the structural strength and clamping reliability of the ligating clip, the inner clamping surface 7 is usually designed as an arc-shaped protrusion towards the inside. There are currently two designs for the outer side surfaces 8 of the two clamping arms. One is the straight structure as Figure 1 shown, such as the "absorbable ligating clip" disclosed in Chinese Patent No. ZL201320672301.X; the other is an arc-shaped concave structure towards the inside, such as the "ligating clip" disclosed in Chinese Patent No. ZL201621475403.2.

[0004] Compared with the traditional hem-o-lok ligating clip with large arc-shaped clamping arms, the above two existing ligating clips have just the right structural strength and toughness of the clamping arms, and can solve the problem that the hem-o-lok ligating clip is prone to breakage during closing and disassembly. However, the absorbable ligating clip is made of a biodegradable material, and the material itself is relatively soft. When clamping blood vessels and body cavity tissues, the two clamps are prone to bulge outward due to deformation. Since the outer side surfaces of the clamping arms of the existing ligating clip are straight structures or even arc-shaped concave structures, in the actual operation process, it is difficult for the inner side wall of the clamp head arm of the clip applicator to fit with the outer side surface of the clamping arm of the ligating clip, which easily brings the following common clinical use problems:

[0005] 1) During the closing process of the ligating clip, since the outer sides of the two clamping arms of the ligating clip do not fit with the clamp head arm of the clip applicator, it is easy to cause large deformation in the middle of the two clamping arms due to the obstruction of blood vessels and body cavity tissues, and further cause the offset of the matching positions of the hook part 5 and the fastening part 6 at the distal end of the ligating clip, resulting in the phenomenon that the ligating clip cannot be closed.

[0006] 2) Also for the above reasons, when closing blood vessels and body cavity tissues, the clamping head arms of the clip applicator mainly act on the positioning post 4 at the distal end of the ligating clip, that is, the ligating clip is mainly stressed at the distal end. At this time, the middle parts of the two clip arms mainly rely on the strength of the material itself to close the blood vessels and body cavity tissues. Since the absorbable material itself is relatively soft, the closing force of the ligating clip on the blood vessels and body cavity tissues is not strong, and it is easy to have the phenomenon that the blood vessels and body cavity tissues are incompletely ligated, resulting in bleeding and leakage. Summary of the Invention

[0007] 1. Technical problems to be solved by the utility model

[0008] The purpose of the present utility model is to overcome the above-mentioned deficiencies existing in the existing ligating clips, and provide an absorbable ligating clip with reliable clamping. By adopting the technical solution of the present utility model, the outer side surfaces of the clip arms of the ligating clip are designed with arc convex surfaces. The outward arching of the outer sides of the clip arms can improve the overall structural strength of the clip arms and increase the closing force of the ligating clip; and during the clamping process, the arc convex surface can be used to contact the bottom wall of the receiving groove of the clamping head arm to reduce the deformation of the clip arms, solving the problem that the ligating clip cannot be closed due to large deformation of the clip arms. At the same time, it can improve the striking force of the clip applicator, ensure the strength of the clip arms during closing, and make the ligation of blood vessels and body cavity tissues more reliable, avoiding the occurrence of bleeding and leakage phenomena.

[0009] 2. Technical solution

[0010] To achieve the above object, the technical solution provided by the present utility model is as follows:

[0011] An absorbable ligating clip with reliable clamping of the present utility model includes a first clip arm and a second clip arm connected by a connecting portion at the proximal end. The distal ends of the first clip arm and the second clip arm are respectively provided with a locking structure for closing the ligating clip and a positioning structure for cooperating with the clip applicator. The inner clamping surfaces opposite to each other of the first clip arm and the second clip arm are both arc convex surfaces protruding inward, and the outer side surfaces of the first clip arm and the second clip arm opposite to the corresponding inner clamping surfaces are both arc convex surfaces protruding outward.

[0012] Furthermore, the outer side surfaces of the first clip arm and the second clip arm are both circular arc convex surfaces, and the chord height of the circular arc convex surface does not exceed 1 mm.

[0013] Furthermore, a number of anti-slip teeth are provided on the inner clamping surfaces opposite to each other of the first clip arm and the second clip arm and are distributed in a staggered manner.

[0014] Furthermore, the positioning structure includes positioning posts respectively provided at the distal ends of the first clip arm and the second clip arm.

[0015] Furthermore, the locking structure includes a hook portion provided at the distal end of the first clip arm and a fastening portion provided at the distal end of the second clip arm and capable of being locked and cooperated with the hook portion.

[0016] Further, a locking surface for engaging with the hook portion is provided on the outer side of the fastening portion.

[0017] Further, a first positioning groove is further provided on the inner side of the distal end of the first clamping arm, and a first positioning protrusion cooperating with the first positioning groove is further provided on the inner side of the distal end of the second clamping arm; a second positioning groove is further provided on the inner side of the hook portion, and a second positioning protrusion cooperating with the second positioning groove is further provided on the outer side of the fastening portion; the first positioning groove and the second positioning groove are respectively located on the left and right sides of the first clamping arm, and the first positioning protrusion and the second positioning protrusion are respectively located on the left and right sides of the second clamping arm.

[0018] Further, a pointed head is provided on the outer side of the hook portion.

[0019] Further, both the inner and outer sides of the connecting portion are transition arcs.

[0020] Further, the absorbable ligating clip is integrally injection molded from a biodegradable material.

[0021] 3. Beneficial effects

[0022] Adopting the technical solution provided by the present utility model, compared with the existing well-known technologies, the following beneficial effects are achieved:

[0023] (1) An absorbable ligating clip with reliable clamping of the present utility model includes a first clamping arm and a second clamping arm connected by a connecting portion at the proximal end. The distal ends of the first clamping arm and the second clamping arm are respectively provided with a locking structure for closing the ligating clip and a positioning structure for cooperating with an applicator forceps. The inner clamping surfaces of the first clamping arm and the second clamping arm facing each other are both arcuate convex surfaces protruding inward, and the outer surfaces of the first clamping arm and the second clamping arm opposite to the corresponding inner clamping surfaces are both arcuate convex surfaces protruding outward. The outer surface of the clamping arm of the ligating clip is designed with an arcuate convex surface. The outward arching of the outer side of the clamping arm can improve the overall structural strength of the clamping arm and increase the closing force of the ligating clip; and during the clamping process, the arcuate convex surface can be used to contact the bottom wall of the receiving groove of the forceps head arm to reduce the deformation of the clamping arm, solving the problem that the ligating clip cannot be closed due to large deformation of the clamping arm. At the same time, the striking force of the applicator forceps can be increased, ensuring the strength of the clamping arm during closing, making the ligation of blood vessels and body cavity tissues more reliable, and avoiding bleeding and leakage phenomena;

[0024] (2) An absorbable ligating clip with reliable clamping of the present utility model has arcuate convex surfaces on the outer sides of the first clamping arm and the second clamping arm, and the chord height of the arcuate convex surface does not exceed 1 mm. It can reduce the use of materials while ensuring the closing force of the ligating clip, ensuring the economy of the absorbable ligating clip;

[0025] (3) A reliable clamping absorbable ligating clip of the present utility model has a plurality of anti-slip teeth distributed in a staggered manner on the inner clamping surfaces of the first and second clamping arms facing each other, which can prevent the ligating clip from sliding relative to blood vessels and body cavity tissues. The arc-shaped convex inner clamping surface further ensures the reliable clamping of the ligating clip;

[0026] (4) A reliable clamping absorbable ligating clip of the present utility model has a positioning structure including positioning posts respectively arranged at the distal ends of the first and second clamping arms, which can stably cooperate with the jaws of the clip applicator, facilitating the removal of the ligating clip from the clip cartridge by using the clip applicator and ensuring the effective closure of the ligating clip. The arc-shaped convex outer side surface of the clamping arm can improve the closing reliability and closing force of the ligating clip;

[0027] (5) A reliable clamping absorbable ligating clip of the present utility model has a locking structure including a hook portion arranged at the distal end of the first clamping arm and a buckling portion arranged at the distal end of the second clamping arm and capable of locking and cooperating with the hook portion, which can improve the reliable locking of the ligating clip during closing; at the same time, in cooperation with the design of two groups of positioning grooves and positioning protrusions at the distal ends of the clamping arms, it can effectively prevent the two clamping arms from sliding left and right and accidentally opening, further improving the closing reliability of the ligating clip;

[0028] (6) A reliable clamping absorbable ligating clip of the present utility model has a pointed head arranged on the outer side of the hook portion, which can play a role in separating other tissues connected to blood vessels or body cavity tissues, ensuring the accuracy of the clamping position of the ligating clip and avoiding the problem of reduced closing reliability of the ligating clip caused by clamping too much unnecessary tissue;

[0029] (7) A reliable clamping absorbable ligating clip of the present utility model has transition arcs on both the inner and outer sides of the connecting portion, which can play an elastic supporting role for the two clamping arms, and the arc transition can reduce the stress concentration problem at the connecting portion of the ligating clip and prevent the ligating clip from breaking. Description of the Drawings

[0030] Figure 1 It is a schematic structural diagram of a ligating clip with a flat outer side surface and an arc-shaped concave inner side surface of the existing clamping arm;

[0031] Figure 2 It is a three-dimensional structural diagram of a reliable clamping absorbable ligating clip of the present utility model from one angle;

[0032] Figure 3 It is a three-dimensional structural diagram of a reliable clamping absorbable ligating clip of the present utility model from another angle;

[0033] Figure 4 It is a side structural diagram of a reliable clamping absorbable ligating clip of the present utility model;

[0034] Figure 5Schematic diagram of the cooperation state between an absorbable ligating clip with reliable clamping and an applicator forceps according to the present utility model;

[0035] Figure 6 Schematic diagram of the clamping state of an absorbable ligating clip with reliable clamping and an applicator forceps according to the present utility model.

[0036] Explanation of the reference numerals in the schematic diagram:

[0037] 1. First clamping arm; 2. Second clamping arm; 3. Connecting part; 4. Positioning column; 5. Hook part; 6. Buckling part; 7. Inner clamping surface; 8. Outer side surface; 9. First positioning groove; 10. First positioning convex block; 11. Second positioning groove; 12. Second positioning convex block; 13. Locking surface; 14. Pointed head; 15. Anti-slip teeth; 16. Forceps head arm; 17. Card slot; 18. Accommodating groove. Specific embodiments

[0038] To further understand the content of the present utility model, the present utility model will be described in detail in combination with the accompanying drawings and embodiments.

[0039] [Embodiment]

[0040] Combined with Figures 2 to 4 As shown, an absorbable ligating clip with reliable clamping in this embodiment includes a first clamping arm 1 and a second clamping arm 2 connected by a connecting part 3 at the proximal end. The first clamping arm 1 and the second clamping arm 2 are connected to form a V-shaped structure. The ends of the first clamping arm 1 and the second clamping arm 2 close to the connecting part 3 are called "proximal ends", and the other ends are called "distal ends". The distal ends of the first clamping arm 1 and the second clamping arm 2 are respectively provided with a locking structure for closing the ligating clip and a positioning structure for cooperating with the applicator forceps. The locking structure can lock the distal ends of the first clamping arm 1 and the second clamping arm 2 together, and then use the two clamping arms to clamp and close blood vessels or other body cavity tissues; the positioning structure is used to stably install the ligating clip on the forceps head of the applicator forceps, facilitating the clamping operation of the ligating clip in cooperation with the applicator forceps. The inner clamping surfaces 7 of the first clamping arm 1 and the second clamping arm 2 facing each other are both inwardly convex arc-shaped surfaces. The inner clamping surface 7 directly contacts the blood vessels or other body cavity tissues. The arc-shaped inner clamping surface 7 designed in this way has a better closing force on the tissues. Different from Figure 1 the existing ligating clip with a flat outer side surface and an arc-shaped concave inner side surface of the clamping arm as shown, for the absorbable ligating clip in this embodiment, the outer side surfaces 8 of the first clamping arm 1 and the second clamping arm 2 opposite to the corresponding inner clamping surfaces 7 are both outwardly convex arc-shaped surfaces (refer to Figure 4 as shown), and the outer side surfaces 8 of the clamping arms designed as arc-shaped convex surfaces are in a slightly arched state. This not only increases the width of the clamping arms, but also the arched outer clamping arms can play a role in dispersing pressure when being deformed under pressure, improving the overall structural strength of the clamping arms and the closing force of the ligating clip. And, combined with Figure 5 and Figure 6As shown, when used in conjunction with a clip applicator, the two clamping arms of the absorbable ligating clip are in an open state and cooperate with the two jaw arms 16 of the clip applicator. The outer sides of the first clamping arm 1 and the second clamping arm 2 are located in the receiving grooves 18 of the jaw arms 16. During the closing process, due to the relatively soft material of the first clamping arm 1 and the second clamping arm 2, they will undergo a certain deformation under the resistance of blood vessels or body cavity tissues. The outer side surface 8 of the clamping arm with an arc-shaped convex surface can inhibit this deformation, and at the same time can also contact the bottom wall of the receiving groove 18 of the jaw arm 16 to reduce the deformation of the clamping arm, solving the problem that the ligating clip cannot be closed due to excessive deformation of the clamping arm. At the same time, it can improve the striking force of the clip applicator, ensure the strength of the clamping arm during closing, make the ligation of blood vessels and body cavity tissues more reliable, and avoid bleeding and leakage phenomena. On the contrary, Figure 1 For the existing ligating clip shown, the outer side surface of its clamping arm is a straight structure or a concave structure. During the closing process of the ligating clip, it is difficult for the bottom wall of the receiving groove 18 of the jaw arm 16 to fit with the outer side surface of the clamping arm, or it needs to undergo a greater deformation before it can fit, resulting in poor clamping strength, and the deformation of the clamping arm is also likely to cause the problem that the ligating clip cannot be closed.

[0041] For the absorbable ligating clip with reliable clamping in this embodiment, the outward protruding dimension of the outer side surfaces 8 of the first clamping arm 1 and the second clamping arm 2 should not be too large. Preferably, the outer side surfaces 8 of the first clamping arm 1 and the second clamping arm 2 are both arc-shaped convex surfaces, and the chord height of the arc-shaped convex surface does not exceed 1 mm, which can reduce the use of materials while ensuring the closing force of the ligating clip and ensure the economy of the absorbable ligating clip. Generally speaking, the chord length of the outer arc-shaped convex surfaces of the first clamping arm 1 and the second clamping arm 2 is 9 - 21 mm, which depends on the ligating clips of different specifications. The larger the size of the ligating clip, the larger the outward protruding dimension of the corresponding outer side surface of the clamping arm, but it should not exceed 1 mm; on the contrary, the smaller the size of the ligating clip, the smaller the outward protruding dimension of the corresponding outer side surface of the clamping arm, but it should not be less than 0.05 mm.

[0042] Referring to Figure 2 and Figure 3 As shown, in this embodiment, a number of anti-slip teeth 15 are arranged in a staggered manner on the relatively inner clamping surfaces 7 of the first clamping arm 1 and the second clamping arm 2. The anti-slip teeth 15 can be raised structures arranged on the inner clamping surface 7, which can prevent the ligating clip from sliding relative to blood vessels and body cavity tissues, and cooperate with the arc-shaped outer convex inner clamping surface 7 to further ensure the reliability of the ligating clip clamping. The above positioning structure includes positioning posts 4 respectively arranged at the distal ends of the first clamping arm 1 and the second clamping arm 2, and the positioning posts 4 can cooperate with the card slots 17 on the jaw arms 16 of the clip applicator, such as Figure 5 and Figure 6As shown, the positioning post 4 is stuck in the card slot 17 of the corresponding clamp head arm 16. At the same time, the outer side surface 8 of the clamping arm with an arc convex surface design can be better limited in the receiving groove 18 of the clamp head arm 16, and can be stably matched with the clamp head of the applicator clamp, facilitating the removal of the ligating clip from the clip cartridge by using the applicator clamp, and ensuring the effective closing of the ligating clip. The outer side surface of the clamping arm with an arc convex surface design can improve the closing reliability and closing force of the ligating clip.

[0043] As shown in Figure 2 and Figure 3 As shown, the above-mentioned locking structure includes a hook part 5 provided at the distal end of the first clamping arm 1 and a fastening part 6 provided at the distal end of the second clamping arm 2 and capable of being locked and matched with the hook part 5. The hook part 5 is generally in an inverted "U" shape. There is a matching inclined surface at the end of the fastening part 6, and a locking surface 13 for buckling with the hook part 5 is provided on the outer side of the fastening part 6, which can improve the closing and locking reliability of the ligating clip. In addition, a first positioning groove 9 is further provided on the inner side of the distal end of the first clamping arm 1, and a first positioning protrusion 10 matched with the first positioning groove 9 is further provided on the inner side of the distal end of the second clamping arm 2; a second positioning groove 11 is further provided on the inner side of the hook part 5, and a second positioning protrusion 12 matched with the second positioning groove 11 is further provided on the outer side of the fastening part 6; the first positioning groove 9 and the second positioning groove 11 are respectively located on the left and right sides of the first clamping arm 1, and the first positioning protrusion 10 and the second positioning protrusion 12 are respectively located on the left and right sides of the second clamping arm 2. With the design of two groups of positioning grooves and positioning protrusions at the distal end of the clamping arm, it can effectively prevent the two clamping arms from sliding left and right and accidentally opening, and further improve the closing reliability of the ligating clip. A pointed head 14 is further provided on the outer side of the hook part 5, which can play a role in separating other tissues connected to blood vessels or body cavity tissues, ensure the accuracy of the ligating position of the ligating clip, and avoid the problem of reduced closing reliability of the ligating clip caused by clamping too much unnecessary tissue.

[0044] In addition, in this embodiment, both the inner and outer sides of the above-mentioned connecting part 3 are transition arcs. The diameter of the transition arc located inside the ligating clip is smaller than the diameter of the transition arc located outside the ligating clip, which can play an elastic supporting role for the two clamping arms, and the arc transition can reduce the stress concentration problem at the connecting part of the ligating clip and prevent the ligating clip from breaking. The absorbable ligating clip is integrally injection-molded from a biodegradable material, and the biodegradable material can be selected from homopolymers and copolymers of glycolide, lactide, and p-dioxanone, etc.

[0045] A resorbable ligating clip with reliable clamping, the outer side of its clamping arm is designed with an arc convex surface. The outward arching of the outer side of the clamping arm can improve the overall structural strength of the clamping arm and enhance the closing force of the ligating clip. Moreover, during the clamping process, the arc convex surface can be used to contact the bottom wall of the receiving groove of the forceps head arm to reduce the deformation of the clamping arm, solving the problem that the ligating clip cannot be closed due to large deformation of the clamping arm. At the same time, it can improve the striking force of the clip applicator, ensure the strength of the clamping arm during closing, make the ligation of blood vessels and body cavity tissues more reliable, and avoid bleeding and leakage phenomena.

[0046] The above has schematically described the present invention and its implementation manners. This description is not restrictive, and what is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. An absorbable ligation clip with reliable clamping, comprising a first clamp arm (1) and a second clamp arm (2) connected at the proximal end by a connecting portion (3), the distal end of the first clamp arm (1) and the distal end of the second clamp arm (2) are respectively provided with a locking structure for closing the ligation clip and a positioning structure for cooperating with a clamp applier, the inner clamping surfaces (7) of the first clamp arm (1) and the second clamp arm (2) facing each other are both arc-shaped convex surfaces protruding inwardly, characterized in that: The outer side surfaces (8) of the first clamping arm (1) and the second clamping arm (2) opposite to the corresponding inner clamping surface (7) are both arc-shaped convex surfaces protruding outwards.

2. The absorbable ligation clip with reliable closure according to claim 1, characterized in that: The outer side surfaces (8) of the first clamp arm (1) and the second clamp arm (2) are both arc-shaped convex surfaces, and the chord height of the arc-shaped convex surface does not exceed 1 mm.

3. The absorbable ligation clip with reliable clamping according to claim 1 or 2, characterized in that: A plurality of staggered anti-slip teeth (15) are provided on the inner clamping surfaces (7) opposite to each other of the first clamping arm (1) and the second clamping arm (2).

4. The absorbable ligation clip with reliable clamping according to claim 1 or 2, characterized in that: The positioning structure comprises positioning posts (4) respectively arranged at the far ends of the first clamping arm (1) and the second clamping arm (2).

5. The absorbable ligation clip with reliable clamping according to claim 1 or 2, characterized in that: The locking structure comprises a hook portion (5) provided at the distal end of the first clamp arm (1) and a buckling portion (6) provided at the distal end of the second clamp arm (2) and capable of lockingly cooperating with the hook portion (5).

6. The absorbable ligation clip with reliable closure according to claim 5, characterized in that: The outer side of the buckling portion (6) is provided with a locking surface (13) buckled with the hook portion (5).

7. The absorbable ligation clip with reliable closure according to claim 5, characterized in that: A first positioning groove (9) is also provided on the inner side of the distal end of the first clamp arm (1), and a first positioning protrusion (10) matching with the first positioning groove (9) is also provided on the inner side of the distal end of the second clamp arm (2); a second positioning groove (11) is also provided on the inner side of the hook portion (5), and a second positioning protrusion (12) matching with the second positioning groove (11) is also provided on the outer side of the buckling portion (6); the first positioning groove (9) and the second positioning groove (11) are respectively located on the left and right sides of the first clamp arm (1), and the first positioning protrusion (10) and the second positioning protrusion (12) are respectively located on the left and right sides of the second clamp arm (2).

8. The absorbable ligation clip with reliable closure according to claim 5, characterized in that: A pointed tip (14) is provided on the outer side of the hook portion (5).

9. The absorbable ligation clip with reliable clamping according to claim 1 or 2, characterized in that: Both the inner and outer sides of the connecting portion (3) are transition arcs.

10. The absorbable ligation clip with reliable clamping according to claim 1 or 2, characterized in that: The absorbable ligation clip is made of biodegradable material by integral injection molding.

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