Absorbable double-layer ligation clamp capable of avoiding interference

Abstract

The utility model discloses an absorbable double-layer ligation clamp capable of avoiding interference, and belongs to the field of medical instruments. The absorbable double-layer ligation clamp comprises an outer sleeve piece, an outer-layer clamp body and an inner-layer clamp body, the outer-layer clamp body and the inner-layer clamp body are assembled in the outer sleeve piece, a positioning column is arranged on the inner-layer clamp body, a positioning hole used for containing the positioning column is formed in the outer sleeve piece, and a check block which is located near the positioning hole and protrudes towards the outer side along the opening direction of the positioning hole is arranged on the outer sleeve piece. According to the utility model, the stop block protruding outwards is arranged near the positioning hole of the outer sleeve piece, and the stop block is used for stopping the positioning column of the adjacent clamped inner layer clip from being clamped into the positioning hole of the outer sleeve piece, so that the phenomenon that the outer sleeve piece pulls the clamped ligation clips when two ligation clips are close to each other is effectively avoided; the clamping reliability and the operation safety of the double-layer ligature clip are improved, and the closing effect of the ligature clip is ensured; moreover, the check block is arranged on the outer sleeve piece simply and conveniently, and is easy to manufacture and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to a ligation clip, in particular to an absorbable double-layer ligation clip capable of avoiding interference. Background Art

[0002] During surgical procedures, ligation clips are often used to clamp intracavitary tissue or blood vessels, achieving both hemostasis and ligation. Ligation clips can be categorized by material as metal, non-absorbable, and absorbable. Absorbable clips are made of biodegradable materials and are completely degraded and absorbed within the body over time. Therefore, absorbable clips are currently more widely used and more readily accepted by patients.

[0003] Absorbable ligature clamps are structurally divided into V-shaped single clamps and double-layer ligature clamps. Compared to the V-shaped single clamp, the double-layer ligature clamp consists of an inner and outer clamp, which are assembled together within the outer sleeve to form a ligature clamp assembly. Although the double-layer ligature clamp is more complex than the V-shaped single clamp, the combination of the inner and outer clamps provides a better clamping effect and is more convenient and efficient to use.

[0004] like Figure 1 and Figure 2 As shown, the inner clamp 3 of the conventional double-layer ligation clamp is held in an open state on the two outer clamp arms 1-1 at the front end of the outer sleeve 1. The clamp arms of the inner clamp 3 are located in the limiting grooves 1-2 on the inner sides of the outer clamp arms 1-1 on the corresponding sides. Elastic arms 1-3 are provided on both sides of the outer sleeve 1. Positioning holes 1-4 are provided at the front ends of the elastic arms 1-3. Positioning posts 3-1 on both sides of the rear portion of the inner clamp 3 engage with the positioning holes 1-4 on the corresponding sides. The outer clamp 2 is provided inside the outer sleeve 1 and located at the rear side of the inner clamp 3. Generally, a push block is also provided at the rear side of the outer clamp 2 to push the outer clamp 2 forward. When in use, the rear end of the outer sleeve 1 is installed on the clamping device. The firing action of the clamping device pushes the push block forward, and then pushes the outer layer clamp 2 to slide forward. Since the position of the inner layer clamp 3 is fixed by the positioning column 3-1, the inner layer clamp 3 cannot move forward at this time. As the outer layer clamp 2 moves forward, the inner layer clamp 3 enters between the two clamping arms of the outer layer clamp 2, thereby realizing the closure of the clamping arms of the inner layer clamp 3; after the inner layer clamp 3 is completely closed, continue to push the outer layer clamp 2. At this time, the elastic arm 1-3 is deformed outward due to the push of the positioning column 3-1, and then the positioning column 3-1 of the inner layer clamp 3 is disengaged from the corresponding positioning hole 1-4, completing the clamping process.

[0005] In clinical practice, in order to effectively ligate tissues or blood vessels, multiple ligature clips are usually required for use. When the clamping positions of two ligature clips are close, interference may sometimes occur between the ligature clips that have been clamped and the outer sleeve 1. Specifically, refer to Figure 3As shown, clinical practice has found that since the above-mentioned positioning holes 1-4 are through holes and have a certain depth, when the two ligation clips are close to each other, the positioning column 3-1 of the inner layer clip 3 that has been clamped is easy to get stuck in the positioning hole 1-4 of the outer sleeve 1 that is being clamped, especially in the final stage of the clamping process. The deformation of the elastic arm 1-3 to the outside will further aggravate the occurrence of this phenomenon. As the outer sleeve 1 retreats after the clamping is completed, it is very easy to pull the ligation clip that has been clamped, causing the ligation clip that has been clamped to shift. This pulling phenomenon not only easily affects the reliability of the ligation clip's closure on tissues or blood vessels, but also easily causes damage to the patient, increasing safety hazards. Summary of the Invention

[0006] 1. Technical problems to be solved by the utility model

[0007] The purpose of the present invention is to overcome the above-mentioned shortcomings of the existing double-layer ligation clamp and provide an absorbable double-layer ligation clamp that can avoid interference. The technical solution of the present invention is to provide a stopper protruding outward near the positioning hole of the outer sleeve, so that the stopper blocks the positioning column of the adjacent inner layer clip that has been clamped and is inserted into the positioning hole of the outer sleeve from the outside, effectively avoiding the outer sleeve from pulling the clamped ligation clamp when the two ligation clamps are close to each other, improving the clamping reliability and operational safety of the double-layer ligation clamp and ensuring the closing effect of the ligation clamp; moreover, the stopper is simple and convenient to set on the outer sleeve, easy to manufacture, and low in manufacturing cost.

[0008] 2. Technical solution

[0009] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0010] The utility model discloses an absorbable double-layer ligation clip capable of avoiding interference, comprising an outer sleeve, and an outer layer clip and an inner layer clip assembled in the outer sleeve, wherein the inner layer clip is provided with a positioning column, the outer sleeve is provided with a positioning hole for accommodating the positioning column, and the outer sleeve is provided with a stopper located near the positioning hole and protruding outward along the opening of the positioning hole.

[0011] Furthermore, the protruding height H of the stopper is not less than 0.2 mm.

[0012] Furthermore, the front end of the outer sleeve has two outer jacket clamp arms for accommodating the inner layer clamp, the inner side of the outer jacket clamp arm is provided with a limit groove, and the outer sleeve is provided with elastic arms on both sides of the outer jacket clamp arm, and the positioning holes and the corresponding side blocks are respectively provided on the elastic arms on both sides.

[0013] Furthermore, the stopper is arranged on a side of the positioning hole on the corresponding side away from the front end of the outer sleeve.

[0014] Furthermore, a side of the protruding end of the stopper away from the positioning hole on the corresponding side is provided with a chamfer or an inclined surface extending toward the rear side.

[0015] Furthermore, the outer layer clip is located behind the inner layer clip in the outer sleeve, and both the outer layer clip and the inner layer clip are made of absorbable material.

[0016] Furthermore, the outer set is an integral injection molded part.

[0017] 3. Beneficial effects

[0018] Compared with the existing known technologies, the technical solution provided by the present invention has the following beneficial effects:

[0019] (1) The utility model provides an absorbable double-layer ligation clamp that can avoid interference, which includes an outer sleeve, and an outer layer clamp and an inner layer clamp assembled in the outer sleeve, the inner layer clamp is provided with a positioning column, the outer sleeve is provided with a positioning hole for accommodating the positioning column, and the outer sleeve is provided with a stopper located near the positioning hole and protruding outward along the opening of the positioning hole. By arranging a stopper protruding outward near the positioning hole of the outer sleeve, the stopper is used to block the positioning column of the adjacent inner layer clamp that has been clamped from being inserted into the positioning hole of the outer sleeve from the outside, effectively avoiding the outer sleeve from pulling the clamped ligation clamp when the two ligation clamps are close to each other, improving the clamping reliability and operational safety of the double-layer ligation clamp, and ensuring the closing effect of the ligation clamp; and the stopper is simple and convenient to set on the outer sleeve, easy to manufacture, and low in manufacturing cost;

[0020] (2) The utility model provides an absorbable double-layer ligation clamp that can avoid interference. The stopper is provided on the side of the positioning hole on the corresponding side away from the front end of the outer sleeve, and the protruding end of the stopper is provided with a chamfer or an inclined surface extending toward the rear side on the side away from the positioning hole on the corresponding side. This can effectively avoid the situation where the stopper is stuck with the adjacent inner layer clamp in some special circumstances, so that the outer sleeve can be smoothly withdrawn after clamping, further avoiding the interference phenomenon of pulling when the two ligation clamps are close to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the three-dimensional structure of an existing double-layer ligation clip;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of an existing double-layer ligation clip;

[0023] Figure 3 A schematic diagram of the interference between the existing double-layer ligation clip and the already applied ligation clip during the clamping process;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the absorbable double-layer ligation clip capable of avoiding interference according to Example 1 of the present utility model;

[0025] Figure 5 This is a schematic diagram of a three-dimensional cross-sectional structure of an absorbable double-layer ligation clip capable of avoiding interference according to Example 1 of the present utility model;

[0026] Figure 6 This is a schematic diagram of a planar cross-sectional structure of an absorbable double-layer ligation clip capable of avoiding interference according to Example 1 of the present utility model;

[0027] Figure 7 Schematic diagram of the absorbable double-layer ligation clip capable of avoiding interference with an adjacent ligation clip that has already been clipped during the clipping process according to Example 1 of the present invention;

[0028] Figure 8 for Figure 7 Schematic diagram of the local enlarged structure at M in the middle;

[0029] Figure 9 This is a schematic diagram of the three-dimensional structure of the absorbable double-layer ligation clip capable of avoiding interference according to Example 2 of the present utility model;

[0030] Figure 10 This is a schematic diagram of a three-dimensional cross-sectional structure of an absorbable double-layer ligation clip capable of avoiding interference according to Example 2 of the present utility model;

[0031] Figure 11 This is a schematic diagram of a planar cross-sectional structure of an absorbable double-layer ligation clip capable of avoiding interference according to Example 2 of the present utility model;

[0032] Figure 12 Schematic diagram of the absorbable double-layer ligation clip capable of avoiding interference with an adjacent ligation clip that has already been clipped during the clipping process according to Example 2 of the present invention;

[0033] Figure 13 for Figure 12 Schematic diagram of the locally enlarged structure at N in the figure.

[0034] Explanation of the numbers in the schematic diagram:

[0035] 1. Outer set; 1-1. Outer jacket clamp arm; 1-2. Limiting groove; 1-3. Elastic arm; 1-4. Positioning hole; 1-5. Stop block; 2. Outer clamp; 3. Inner clamp; 3-1. Positioning column. DETAILED DESCRIPTION

[0036] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0037] Figures 1 to 3The structure of the existing double-layer ligation clamp is shown, as well as the reasons for the interference phenomenon with the ligation clamp that has been clamped during the clamping process. Clinical practice has found that when multiple ligation clamps are closed at similar positions, the positioning column 3-1 of the inner layer clamp 3 of the clamped ligation clamp is easily stuck in the positioning hole 1-4 of the outer sleeve 1 being clamped, and when the outer sleeve 1 moves backward, it causes the ligation clamp to shift, affecting the closing effect. To solve this problem, the utility model uses the principle of blocking and limiting, and limits the double-layer ligation clamp that has been clamped by the block outside the positioning hole, so that the positioning column 3-1 of the adjacent inner layer clamp 3 that has been clamped cannot enter the positioning hole 1-4 of the outer sleeve 1, thereby effectively preventing the operational interference problem that exists when the two ligation clamps are close, and improving the clamping reliability and operational safety of the double-layer ligation clamp.

[0038] The present invention will be further described below with reference to the embodiments.

[0039] [Example 1]

[0040] Combine Figures 4 to 6 As shown, this embodiment of an absorbable double-layer ligation clamp that can avoid interference includes an outer sleeve 1, an outer clamp 2, and an inner clamp 3 assembled within the outer sleeve 1. The inner clamp 3 is provided with a positioning post 3-1, and the outer sleeve 1 is provided with a positioning hole 1-4 for accommodating the positioning post 3-1. The outer sleeve 1 is provided with a stopper 1-5 located near the positioning hole 1-4 and protruding outward along the opening of the positioning hole 1-4. The stopper 1-5 serves to isolate adjacent ligation clamps from entering the positioning hole 1-4 of the outer sleeve 1 currently clamping. This effectively prevents the outer sleeve from pulling on the already clamped ligation clamp when the two ligation clamps are close together, thereby improving the clamping reliability and operational safety of the double-layer ligation clamp and ensuring the closure effect of the ligation clamp. Furthermore, the provision of the stopper 1-5 on the outer sleeve 1 is simple in structure, easy to manufacture, and low in cost.

[0041] In this embodiment, the protruding height H of the stopper 1-5 is not less than 0.2 mm. Figure 6 As shown, the protruding height H of the stopper 1-5 refers to the distance from the root to the outer end of the stopper 1-5. Since the stopper 1-5 protrudes outward, when clamping, if the two ligation clips are too close, the stopper 1-5 can abut against one side of the clamped ligation clip, thereby limiting the distance between the two ligation clips, thereby solving the above-mentioned interference problem in the clamping process. Figure 7As shown, after one ligature clamp is applied, the outer clamp 2 and the inner clamp 3 are closed; when the second ligature clamp is placed, when the outer sleeve 1 is close to the ligature clamp that has been applied, the stopper 1-5 on it can abut against one side of the outer clamp 2. Since the stopper 1-5 has a certain height, the positioning post 3-1 of the closed inner clamp 3 can only maintain a certain distance from the outer sleeve 1 being applied and cannot be inserted into its positioning hole 1-4. Even if the positioning hole 1-4 of the outer sleeve 1 partially expands outward during the clamping process, the stopper 1-5 can push the closed ligature clamp laterally, and can also prevent the positioning post 3-1 of the inner clamp 3 from being inserted into the positioning hole 1-4 of the outer sleeve 1 from the outside, thereby preventing the outer sleeve 1 from pulling the closed ligature clamp when it is withdrawn. Generally speaking, the protruding height H of the blocks 1-5 should not be too large. Under the condition that the above-mentioned interference problem can be avoided, the protruding height H of the blocks 1-5 can be as small as possible. For example, the maximum protruding height H may not exceed 4 mm. The specific height H can be determined according to the different size specifications of the double-layer ligation clamp.

[0042] Reference Figures 4 to 6 As shown, similar to the structure of existing double-layer ligation clamps, the front end of the outer sleeve 1 has two outer clamp arms 1-1 for accommodating the inner clamp 3. The inner sides of the outer clamp arms 1-1 are provided with retaining grooves 1-2. When the inner clamp 3 is open, it is positioned between the two outer clamp arms 1-1, with the two clamp arms of the inner clamp 3 positioned within the corresponding retaining grooves 1-2. Elastic arms 1-3 are provided on either side of the outer clamp arms 1-1 of the outer sleeve 1. These elastic arms 1-3 can be integrally formed with the outer sleeve 1, forming a cantilevered structure with a certain degree of elasticity capable of outward deformation. Positioning holes 1-4 and corresponding side blocks 1-5 are provided on each side of the elastic arms 1-3. Two positioning posts 3-1 at the rear of the inner clamp 3 are positioned within the corresponding positioning holes 1-4. The outer clamp 2 is positioned within a slideway on the inner side of the outer sleeve 1. The front end of the outer clamp 2 has a roughly V-shaped guide notch, allowing the inner clamp 3 to slide along the guide notch into the clamping groove of the outer clamp 2. A guide track is also provided in the clamping groove of the outer layer clamp 2, and a track groove is provided on the outside of the two clamping arms of the inner layer clamp 3. The outer layer clamp 2 is located at the rear of the inner layer clamp 3 in the outer sleeve 1. The outer layer clamp 2 and the inner layer clamp 3 are both made of absorbable material. The outer sleeve 1 is an integral injection molded part. When the outer layer clamp 2 is pushed forward, the inner layer clamp 3 does not move relative to the outer sleeve 1 under the restriction of the positioning column 3-1 and the positioning hole 1-4. At this time, as the outer layer clamp 2 is pushed forward, the inner layer clamp 3 gradually enters the clamping groove of the outer layer clamp 2, so that the clamping arms of the inner layer clamp 3 are closed; when the inner layer clamp 3 is completely closed, the outer layer clamp 2 and the inner layer clamp 3 are attached together, and continue to push the outer layer clamp 2 forward, forcing the inner layer clamp 3 to move forward together. At this time, the elastic arm 1-3 is elastically deformed outward under the action of the positioning column 3-1, and finally the positioning column 3-1 is disengaged from the positioning hole 1-4, completing the entire clamping process.

[0043] catch Figures 4 to 6 As shown, in this embodiment, the stopper 1-5 is arranged on the side of the positioning hole 1-4 on the corresponding side away from the front end of the outer sleeve 1, that is, when the outer sleeve clamp arm 1-1 of the outer sleeve 1 is the "front end", the stopper 1-5 is located on the rear side of the positioning hole 1-4, which can prevent the stopper 1-5 from moving in front of the positioning column 3-1 of the closed inner layer clamp 3 and causing mutual pulling. In addition, the protruding end of the stopper 1-5 is provided with a chamfer on the side away from the positioning hole 1-4 on the corresponding side (such as Figure 6 The chamfer can guide the withdrawal of the outer sleeve 1, and can effectively avoid the situation in which the block is stuck with the adjacent inner layer clamp in some special circumstances, such as when the clamping position is too far forward and the block 1-5 is located before the positioning column 3-1 of the closed inner layer clamp 3. At this time, the chamfer structure can make the block 1-5 smoothly pass over the positioning column 3-1 of the adjacent inner layer clamp 3 when the outer sleeve 1 is withdrawn, so that the outer sleeve 1 can be smoothly withdrawn after clamping, further avoiding the interference phenomenon of pulling when the two ligation clamps are close.

[0044] [Example 2]

[0045] The absorbable double-layer ligation clip of this embodiment is capable of avoiding interference. Its basic structure and working principle are the same as those of the first embodiment, except that:

[0046] In this embodiment, the structure of the block 1-5 is different from that in Example 1. While the block 1-5 in Example 1 is arranged perpendicular to the front-to-back direction of the outer sleeve 1, the block 1-5 in this embodiment is arranged along the front-to-back direction of the outer sleeve 1. Furthermore, a slope extending rearward is provided on the side of the protruding end of the block 1-5 away from the corresponding positioning hole 1-4. This slope serves as a guide when the outer sleeve 1 is withdrawn, effectively preventing the block 1-5 from getting stuck in the adjacent inner clip 3 in some special circumstances, such as when the clamping position is too far forward, causing the block 1-5 to be located before the positioning post 3-1 of the closed inner clip 3. In this case, the slope allows the block 1-5 to smoothly pass over the positioning post 3-1 of the adjacent inner clip 3 when the outer sleeve 1 is withdrawn, allowing the outer sleeve 1 to be smoothly withdrawn after clamping, further avoiding the pulling interference phenomenon that occurs when two ligation clips are close to each other.

[0047] It is worth noting that the specific shapes of the above-mentioned blocks 1-5 are not limited to the above-mentioned embodiments 1 and 2, and cylindrical, elliptical, polygonal and other special-shaped protrusion structures may also be adopted.

[0048] The utility model discloses an absorbable double-layer ligation clamp which can avoid interference. A stopper protruding outward is provided near the positioning hole of the outer sleeve, and the stopper is used to block the positioning post of the adjacent inner layer clip which has been clamped and is clamped into the positioning hole of the outer sleeve from the outside, thereby effectively avoiding that the outer sleeve pulls the clamped ligation clamp when the two ligation clamps are close to each other, thereby improving the clamping reliability and operational safety of the double-layer ligation clamp and ensuring the closing effect of the ligation clamp. In addition, the stopper is simple and convenient to set on the outer sleeve, easy to manufacture, and low in manufacturing cost.

[0049] The above schematically describes the present invention and its embodiments, which is not intended to be limiting. The accompanying drawings illustrate only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the spirit of the present invention, uninventively designs structures and embodiments similar to this technical solution, they shall fall within the scope of protection of the present invention.

Claims

1. An absorbable double-layer ligation clip capable of avoiding interference, comprising an outer sleeve (1), an outer layer clip (2) and an inner layer clip (3) assembled in the outer sleeve (1), the inner layer clip (3) being provided with a positioning post (3-1), and the outer sleeve (1) being provided with a positioning hole (1-4) for accommodating the positioning post (3-1), characterized in that: The outer sleeve (1) is provided with a stopper (1-5) located near the positioning hole (1-4) and protruding outward along the opening of the positioning hole (1-4).

2. The absorbable double-layer ligation clip capable of avoiding interference according to claim 1, characterized in that: The protruding height H of the stopper (1-5) is not less than 0.2 mm.

3. The interference-avoiding absorbable double-layer ligation clip according to claim 1 or 2, characterized in that: The front end of the outer sleeve (1) has two outer jacket clamp arms (1-1) for accommodating the inner layer clamp (3), the inner side of the outer jacket clamp arm (1-1) is provided with a limit groove (1-2), the outer sleeve (1) is provided with elastic arms (1-3) on both sides of the outer jacket clamp arm (1-1), and the positioning hole (1-4) and the stopper (1-5) on the corresponding side are respectively provided on the elastic arms (1-3) on both sides.

4. The absorbable double-layer ligation clip capable of avoiding interference according to claim 3, characterized in that: The stopper (1-5) is arranged on a side of the positioning hole (1-4) on the corresponding side away from the front end of the outer sleeve (1).

5. The absorbable double-layer ligation clip capable of avoiding interference according to claim 4, characterized in that: A side of the protruding end of the stopper (1-5) away from the positioning hole (1-4) on the corresponding side is provided with a chamfer or an inclined surface extending toward the rear side.

6. The absorbable double-layer ligation clip capable of avoiding interference according to claim 3, characterized in that: The outer layer clip (2) is located behind the inner layer clip (3) in the outer sleeve (1); both the outer layer clip (2) and the inner layer clip (3) are made of absorbable material.

7. The absorbable double-layer ligation clip capable of avoiding interference according to claim 6, characterized in that: The outer casing (1) is an integral injection-molded part.

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