Anti-falling absorbable ligation clip

Abstract

The invention discloses an anti-falling absorbable ligation clip which comprises an inner clip (1) and an outer clip (2), the inner clip (1) is provided with two inner clip arms (11) capable of being pressed and closed, the outer clip (2) is provided with two outer clip arms (21) for pressing and closing the inner clip arms (11) of the inner clip (1), a closed sleeve (13) is arranged on the outer sides of the two inner clip arms (11) of the inner clip (1), and the inner clip arms (11) of the inner clip (1) are sleeved with the outer sleeve (13). When the outer clamping arm (21) presses and closes the inner clamping arm (11), the outer clamping arm (21) of the outer clamp (2) is arranged in the sleeve (13) in a penetrating mode and slides. According to the sleeve structure, slipping between the inner clamp and the outer clamp can be thoroughly avoided, and therefore the problem that in the prior art, buckling of the inner clamp and the outer clamp fails is thoroughly avoided. Besides, burrs are further arranged on the inner clamp, and when force operation is carried out, even if shaking occurs, the burrs can generate certain blocking force on the tissue, so that the technical requirements of personnel are reduced, and the operation precision is improved.

Description

Technical Field

[0001] The present invention relates to a ligation clip in the technical field of medical devices, and particularly to an anti-detachment absorbable ligation clip that can be used for closing and ligating organs and tissues such as blood vessels and bile ducts. Background Art

[0002] CN 111084646 B discloses an absorbable hemostatic ligation clip, which includes: a forceps head assembly and an outer sleeve assembly, and the outer sleeve assembly is installed at the rear end of the forceps head assembly; the forceps head assembly includes a forceps head, and two outer clips and two inner clips are arranged in the forceps head; the outer sleeve assembly includes an outer sleeve tube, a button member, a rotating piston and a spring. The outer clip includes a first outer clip arm and a second outer clip arm, and the front ends of the first outer clip arm and the second outer clip arm are oppositely arranged at the clip mouth end; the inner clip includes a first inner clip arm and a second inner clip arm, a connection end is formed at the rear ends of the first inner clip arm and the second inner clip arm, a notch matching with the clip mouth end is arranged in the middle of the connection end, and outer sliding grooves are arranged on the outer surfaces of the first inner clip arm and the second inner clip arm, and the outer sliding grooves are smoothly transitioned with the notch.

[0003] CN 117297696 A discloses an anti-slip and anti-detachment absorbable tissue closing clip. The closing clip includes an inner clip and an outer clip. The inner clip includes a first inner clip arm and a second inner clip arm, and the outer clip includes a first outer clip arm and a second outer clip arm. Closing guide rails distributed along the clip arms are arranged on the inner walls of the first outer clip arm and the second outer clip arm, and guiding grooves matching with the closing guide rails are arranged on the outer walls of the first inner clip arm and the second inner clip arm; anti-slip reverse barbs are arranged in the middle and at the head of the first outer clip arm and the second outer clip arm, and anti-slip fixing grooves matching with the anti-slip reverse barbs are arranged on the outer walls of the first inner clip arm and the second inner clip arm.

[0004] The above-mentioned existing absorbable ligation clips apply a closing force to the inner clip by pushing the outer clip, thereby closing tissues such as blood vessels; the inner clip in contact with tissues such as blood vessels is made of a flexible polymer material, which can close the blood vessels without damaging them. Correspondingly, the outer clip usually has greater strength and is not easily plastically deformed, while the inner clip is usually easily deformed and relatively soft. However, the inner clip and the outer clip of the existing absorbable ligation clips adopt a snap-fit form, and the inner and outer clips slide along the snap to prevent them from detaching; and because the inner clip is relatively soft, the snap on the inner clip is easily deformed during the closing process, so the snap-fit of the inner clip and the outer clip is easily detached due to the deformation of the inner clip, and it is often found that this snap-fit form actually does not play a big role during operation.

[0005] Similarly, CN 221844862 U discloses an absorbable ligating clip with good clamping stability, including an outer clip and an inner clip both having a U-shaped opening structure. The middle part of the outer clip has a first groove with an opening facing the right end. On the inner side surfaces of the two side arms of the outer clip, there are guiding strip blocks, and hooks are respectively arranged at the end parts of the inner side surfaces of the two side arms. On the outer side surfaces of the two support legs of the inner clip, there are guiding grooves adapted to the guiding strip blocks respectively, and clamping holes are arranged at the ends of the support legs at the bottom of the guiding grooves. When the outer clip and the inner clip are clamped and assembled, the guiding strip blocks on the two side arms are correspondingly inserted into the guiding grooves of the support legs, and the hooks are clamped into the corresponding clamping holes. Although the guiding grooves of the inner clip of the absorbable ligating clip of the prior art are designed with a concave structure, after all, the guiding grooves are open structures, and there is still a risk of being squeezed open under extrusion. Therefore, there is still a problem of slippage in the snap fit between the outer clip and the inner clip of the prior art.

[0006] In addition, for the absorbable ligating clip of the above prior art, the operating mechanism is to conduct external force through the robotic arm at the front end of the clip applicator, drive the outer clip to generate an axial sliding displacement along the surface of the inner clip, and make the inner clip deform by means of the clamping force of the outer clip, so as to anastomose tissues such as blood vessels. A certain pushing pressure needs to be applied during this closing process. When the operator applies a longitudinal thrust, the front end of the clip applicator is prone to jitter, and tissues such as blood vessels are easily displaced out of the range of the inner clip due to the jitter, resulting in reduced surgical precision, longer surgical duration, and increased pain for the patient. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an anti-detachment absorbable ligating clip to reduce or avoid the problems mentioned above.

[0008] To solve the above technical problem, the present invention provides an anti-detachment absorbable ligating clip, including an inner clip and an outer clip. The inner clip has two inner clip arms that can be tightly closed, and the outer clip has two outer clip arms that tightly close the inner clip arms. Among them, closed sleeves are arranged on the outer sides of the two inner clip arms of the inner clip, and when the outer clip arms tightly close the inner clip arms, the outer clip arms of the outer clip penetrate and slide inside the sleeves.

[0009] Preferably, the sleeve extends along the entire length of the inner clip arm, and the outer clip arms of the outer clip completely penetrate and are inside the sleeve.

[0010] Preferably, a plurality of protruding burrs are arranged on the inner sides of the two inner clip arms of the inner clip.

[0011] Preferably, the burrs are in a brush-like structure, and the burrs on the two inner clip arms extend out relatively from both sides, and a channel is formed at intervals at the ends of the burrs extending out relatively from both sides.

[0012] Preferably, the width of the channel is between 2 / 3 and 3 / 4 of the diameter of the tissue to be clamped.

[0013] Preferably, the burrs are in a conical structure with a large bottom and a small top, and the taper of the burrs is 1 - 3 degrees.

[0014] Preferably, the ratio of the average diameter to the length of the burrs is between 1:10 and 1:15.

[0015] Preferably, the burrs protruding relatively from both sides of the two inner clamping arms of the inner clamp are stagger - arranged.

[0016] Preferably, a sliding clamping structure is provided between the inner clamp and the outer clamp. The sliding clamping structure includes sliding grooves provided on the outer sides of the two inner clamping arms of the inner clamp, and flanges provided on the inner sides of the two outer clamping arms of the outer clamp and engaged with the sliding grooves.

[0017] Preferably, the head of the outer clamp is set in a hook - like structure, including an inner hook body integrally extending along the flange and outer hook bodies on both sides of the inner hook body; a plurality of openings for the inner hook body to be embedded are spaced at the bottom of the sliding groove of the inner clamp.

[0018] The sleeve structure of the present invention can completely avoid the slippage between the inner clamp and the outer clamp. Even if the inner clamp undergoes large deformation, since the outer clamp is inserted into the sleeve, no matter how the outer clamp moves, it cannot break away from the restraint of the sleeve, thus completely avoiding the problem of the failure of the inner - outer clamp buckle in the prior art.

[0019] Meanwhile, the burrs on the inner clamp of the present invention form a brush - like structure, which is easy for tissues such as blood vessels to enter the range between the two inner clamping arms of the inner clamp, and the brush - like structure will not cause damage to the tissues. When operating with force, even if there is jitter, the burrs will generate a certain blocking force on the tissues, thereby reducing the possibility of the tissues slipping out of the range of the inner clamp, greatly improving the success rate of the surgical operation, thus reducing the technical requirements for personnel and improving the surgical precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings are only intended to illustrate and explain the present application schematically, and do not limit the scope of the present invention.

[0021] Figure 1 Shows an exploded view of an anti - detachment absorbable ligation clip according to a specific embodiment of the present invention.

[0022] Figure 2 Shows a cross - sectional view of the outer clamp of an anti - detachment absorbable ligation clip according to another specific embodiment of the present invention.

[0023] Figure 3Shown is a schematic plan view of an anti - detachment absorbable ligating clip according to another specific embodiment of the present invention.

[0024] Figure 4 Shown is a schematic cross - sectional structure view of the inner clip of an anti - detachment absorbable ligating clip according to still another specific embodiment of the present invention.

[0025] Figure 5 Shown is a schematic semi - cross - sectional three - dimensional structure view of the inner clip of an anti - detachment absorbable ligating clip according to a specific embodiment of the present invention. Detailed implementation manners

[0026] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. Among them, the same components are denoted by the same reference numerals.

[0027] As Figure 1-2 shown, the present invention provides an anti - detachment absorbable ligating clip with an improved structure. Similar to the prior art, the anti - detachment absorbable ligating clip of the present invention also includes an inner clip 1 and an outer clip 2. The inner clip 1 has two inner clip arms 11 that can be tightly closed, and the outer clip 2 has two outer clip arms 21 that press and close the inner clip arms 11 of the inner clip 1. During the operation of the ligating clip during surgery, the outer clip 2 is pushed towards the inner clip 1 by a clip - applying forceps (not shown in the figure), so that the two inner clip arms 11 slide between the two outer clip arms 21. Thus, the two inner clip arms 11 made of a flexible material are clamped by the strong action of the two outer clip arms 21, and tissues such as blood vessels are closed between the two inner clip arms 11.

[0028] Similarly to the prior art, both the inner clip 1 and the outer clip 2 are made of a biodegradable polymer material and can be left in the patient's body after surgery and gradually absorbed by the human body. The selection of materials for absorbable vascular clips can all refer to the prior art and are not within the scope of the invention claimed, so they will not be elaborated here one by one.

[0029] In addition, similar to the prior art, in order to prevent the inner clip 1 and the outer clip 2 from separating from each other during the anastomosis operation, a sliding and clamping structure is provided between the inner clip 1 and the outer clip 2. As shown in the figure, the sliding and clamping structure includes sliding grooves 12 provided on the outer sides of the two inner clip arms 11 of the inner clip 1, and flanges 22 provided on the inner sides of the two outer clip arms 21 of the outer clip 2 and engaged with the sliding grooves 12. When the two inner clip arms 11 of the inner clip 1 slide into the two outer clip arms 21 of the outer clip 2, the flanges 22 of the outer clip arms 21 can be clamped into the sliding grooves 12 of the inner clip arms 11, thereby preventing the inner clip 1 from sliding laterally relative to the outer clip 2 and achieving the effect of anti - detachment.

[0030] To prevent the outer clip 2 from retracting when sliding along the sliding groove 12, the head of the outer clip 2 is provided with a hook-shaped structure, including an inner hook body 221 extending integrally along the flange 22 and outer hook bodies 222 located on both sides of the inner hook body 221; corresponding to the inner hook body 221, a plurality of openings 121 for the inner hook body 221 to be embedded are arranged at intervals at the bottom of the sliding groove 12 of the inner clip 1. When the flange 22 slides along the sliding groove 12, the inner hook body 221 falling into the opening 121 will form a jamming, thereby avoiding the inner clip 1 from retracting backward. In the illustrated specific embodiment, three openings 121 are arranged at intervals at the bottom of the sliding groove 12, so three jammings will be formed during operation. The operator can be convinced that the inner clip 1 has completely entered the outer clip 2 when feeling the three jammings, thereby judging the progress of the anastomosis operation.

[0031] The outer hook bodies 222 located on both sides of the inner hook body 221 are stuck on both side walls of the sliding groove 12 when sliding. Therefore, by setting the height of the outer hook bodies 222, the depth of the inner hook body 221 falling into the opening 121 can be controlled, so as to control the force when operating the outer clip 2 to slide.

[0032] Further, the opening 121 at the bottom of the sliding groove 12 forms a first inclined surface 1211 along the sliding direction and a second inclined surface 1212 along the reverse sliding direction. Among them, the first inclined surface 1211 has a smaller slope relative to the second inclined surface 1212. Therefore, it is convenient for the inner hook body 221 to fall into the opening 121 along the sliding direction, but it is difficult to retract in the reverse sliding direction. In the preferred embodiment, the slope angle α of the first inclined surface 1211 relative to the bottom of the sliding groove 12 is 60-70 degrees, and the slope angle β of the second inclined surface 1212 relative to the bottom of the sliding groove 12 is 75-105 degrees. The above angle range has better buckling effect after testing and has relatively excellent operation performance.

[0033] Of course, as described in the background art, since the material used for the inner clip 1 is usually relatively soft and prone to deformation, even if a sliding connection structure is provided between the inner clip 1 and the outer clip 2, when the inner clip 1 is greatly deformed, the sliding groove 12 on the inner clip 1 is not sufficient to ensure that the flange 22 of the outer clip 2 can be constrained therein. Therefore, the problem that the inner clip 1 slips out of the outer clip 2 will inevitably occur.

[0034] To solve this problem, the present application provides a solution. On the outer sides of the two inner clip arms 11 of the inner clip 1, closed sleeves 13 are provided. When the outer clip arm 21 of the outer clip 2 presses and closes the inner clip arm 11, the outer clip arm 21 of the outer clip 2 slides inside the sleeve 13. The sleeve structure of the present invention can completely avoid the problem of slipping between the inner clip 1 and the outer clip 2. Even if the inner clip 1 is greatly deformed, since the outer clip 2 is inserted into the sleeve 13, the outer clip 2 cannot break away from the constraint of the sleeve 13 no matter what kind of movement occurs, thereby completely avoiding the problem of the inner and outer clip buckling failure in the prior art.

[0035] In the illustrated embodiment, the sleeve 13 does not cover the entire length of the inner clamping arms 11 of the inner clip 1, as long as it can ensure that the inner and outer clips do not slip off, which can reduce the amount of material used and the processing difficulty. Of course, when the cost is affordable, it is preferred that the sleeve 13 extends along the entire length of the inner clamping arm 11, so that the outer clamping arm 21 of the outer clip 2 is completely inserted into the inside of the sleeve 13, and the formed constraint range is larger, which can maximize the avoidance of the slipping phenomenon caused by the deformation of the inner clip 1.

[0036] In addition, as described in the background art, since the inner and outer clips of the anti-slip absorbable ligating clip need to push the outer clip to slide inwardly relative to the inner clip while closing the inner clip by the clip applicator. Therefore, tissues such as blood vessels that were originally aligned and within the range of the inner clip are easily displaced from the range of the inner clip due to the front end of the clip applicator shaking when the outer clip is pushed forcefully.

[0037] To solve this problem, the present application provides another solution. A plurality of protruding burrs 14 are provided on the inner sides of the two inner clamping arms 11 of the inner clip 1, as shown in the figure. For ease of understanding, the number of burrs 14 shown in the figure is clearly countable. In an actual product, the number of such burrs 14 is large, forming a brush-like structure. The burrs 14 on the two inner clamping arms 11 protrude relatively from both sides, and a channel 15 is formed by the intervals between the ends of the burrs 14 protruding relatively from both sides for tissues such as blood vessels to pass through. Of course, the width of the channel 15 is preferably between 2 / 3 and 3 / 4 of the diameter of the tissue such as blood vessel to be clamped, which is convenient for the tissue to pass through and not easy for the tissue to slip out of the channel 15.

[0038] In the anti-slip absorbable ligating clip with an inner and outer clip nested structure design, the inner clip in contact with tissues such as blood vessels is made of a flexible polymer material. The burrs 14 on the inner clip are integrally formed with the inner clip using the same material. The ratio of the diameter to the length of the burrs 14 is very small, and the brush-like structure formed by the burrs 14 is very soft. During operation, the inner clip 1 is aligned with tissues such as blood vessels, and then it is easy for the tissue to enter the range of the two inner clamping arms 11 of the inner clip 1 through the channel 15, and the soft brush-like structure will not cause damage to the tissue. When the clip applicator is operated forcefully, even if the front end of the clip applicator shakes, due to the presence of the burrs 14, a certain blocking force will be generated on the tissue, thereby reducing the possibility of the tissue slipping out of the range of the inner clip 1, greatly improving the success rate of the clip applicator operation, thus reducing the requirements for personnel skills and improving the surgical precision.

[0039] In the illustrated embodiment, it is preferred that the burrs 14 have a conical structure with a large bottom and a small top, the taper of the burrs 14 is 1-3 degrees, and the ratio of the average diameter to the length of the burrs 14 is between 1:10 and 1:15.

[0040] Furthermore, the burrs 14 protruding relatively from both sides of the two inner clamping arms 11 of the inner clamp 1 are arranged staggeredly, as shown in the figure. The staggeredly arranged burrs 14 can provide space for each other to fall when the inner clamp 1 is closed, avoiding the accumulation of local burrs 14 and affecting the closing. In addition, after the inner clamp 1 is closed, the fallen burrs 14 can increase the friction between the inner clamping arms 11 and improve the firmness of clamping.

[0041] The above is the most important improvement made by the present application relative to the prior art. For other structures of the inner and outer clamps or supporting operating tools, etc., the same or similar structures described in the prior art can be adopted. Those skilled in the art can understand based on the background art and the content described in other prior arts, and the relevant content is prior art and not within the protection scope of the present application, so there is no need to repeat the description.

[0042] In summary, the sleeve structure of the present invention can completely avoid the slippage between the inner clamp and the outer clamp, thus completely avoiding the problem of the inner and outer clamp buckle failure in the prior art. In addition, the present invention also sets burrs on the inner clamp. When operating with force, even if there is a jitter, the burrs will also generate a certain blocking force on the tissue, thereby reducing the technical requirements for personnel and improving the surgical precision.

[0043] Those skilled in the art should understand that although the present invention is described in the form of multiple embodiments, not every embodiment only contains an independent technical solution. The description in the specification is only for clarity. Those skilled in the art should understand the specification as a whole and consider the technical solutions involved in each embodiment as ways that can be combined with each other to form different embodiments to understand the protection scope of the present invention.

[0044] The above is only the schematic specific implementation manner of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. An absorbable ligation clip that prevents loss of adhesion, comprising an inner clip (1) and an outer clip (2), wherein the inner clip (1) has two inner clip arms (11) that can be compressed and closed, and the outer clip (2) has two outer clip arms (21) that compress and close the inner clip arms (11) of the inner clip (1), characterized in that: A closed sleeve (13) is provided on the outer sides of the two inner clamp arms (11) of the inner clamp (1); when the outer clamp arms (21) press and close the inner clamp arms (11), the outer clamp arms (21) of the outer clamp (2) penetrate into the interior of the sleeve (13) and slide.

2. The absorbable ligation clip according to claim 1, characterized in that: The sleeve (13) extends along the entire length of the inner clamp arm (11), and the outer clamp arm (21) of the outer clamp (2) is completely inserted into the interior of the sleeve (13).

3. The anti-dislocation absorbable ligation clip according to claim 1 or 2, characterized in that: A plurality of protruding burrs (14) are provided on the inner sides of the two inner clamp arms (11) of the inner clamp (1).

4. The anti-dislocation absorbable ligation clip according to claim 3, characterized in that: The burrs (14) are in a brush-like structure, and the burrs (14) on the two inner clamping arms (11) extend from two opposite sides, with the ends of the burrs (14) extending from the two opposite sides being spaced apart to form a channel (15).

5. The absorbable ligation clip according to claim 4, characterized in that: The width of the channel (15) is between 2 / 3 and 3 / 4 of the diameter of the tissue to be clamped.

6. The anti-dislocation absorbable ligation clip according to any one of claims 3 to 5, characterized in that: The burr (14) is in the form of a cone with a large bottom and a small top, and the taper of the burr (14) is 1-3 degrees.

7. The absorbable ligation clip according to any one of claims 3 to 5, characterized in that: The ratio of the average diameter to the length of the burr (14) is between 1:10 and 1:

15.

8. The absorbable ligation clip according to any one of claims 3 to 5, characterized in that: The burrs (14) extending oppositely from the two inner clamp arms (11) of the inner clamp (1) are arranged in a staggered manner.

9. The anti-dislocation absorbable ligation clip according to any one of claims 1 to 8, characterized in that: A sliding snap-fit ​​structure is provided between the inner clamp (1) and the outer clamp (2), the sliding snap-fit ​​structure comprising a sliding groove (12) provided on the outer sides of two inner clamp arms (11) of the inner clamp (1), and a flange (22) provided on the inner sides of two outer clamp arms (21) of the outer clamp (2) and snap-fitted with the sliding groove (12).

10. The absorbable ligation clip according to claim 9, characterized in that: The head of the outer clip (2) is configured as a hook-shaped structure, comprising an inner hook body (221) extending integrally along the flange (22) and outer hook bodies (222) located on both sides of the inner hook body (221); a plurality of openings (121) for the inner hook bodies (221) to be embedded are arranged at intervals at the bottom of the sliding groove (12) of the inner clip (1).

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