Anti-dislodgement hemostatic clip

Abstract

The utility model discloses a kind of anti-drop hemostatic forceps, including inner clamp (1) and outer clamp (2), the inner clamp (1) has two inner clamp arms (11) that can be compressed closed, the outer clamp (2) has two outer clamp arms (21) that compress closed the inner clamp arm (11) of the inner clamp (1), wherein, the outer side of the two inner clamp arms (11) of the inner clamp (1) is provided with closed sleeve (13), when the outer clamp arm (21) compresses closed the inner clamp arm (11), the outer clamp arm (21) of the outer clamp (2) is slid inside the sleeve (13) is provided in. The sleeve structure of the utility model can completely avoid the problem that the inner clamp and the outer clamp slip, even if the inner clamp occurs larger deformation, because the outer clamp is provided in sleeve, no matter how the outer clamp moves, it cannot be separated from the constraint of sleeve, thereby completely avoiding the problem that inner and outer clamp clasp buckle fail in prior art.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology and relates to an anti-detachment hemostatic clip. Background Technology

[0002] CN 221844862 U discloses an absorbable hemostatic clip with good snap-fit ​​stability, comprising an outer clip and an inner clip, both with U-shaped openings. The outer clip has a groove in the middle with its opening facing the right end. The inner sides of the two support arms of the outer clip have guide strips, and the inner ends of the two support arms are respectively provided with hooks. The outer sides of the two support legs of the inner clip each have guide grooves adapted to the guide strips. The bottom of the guide grooves has locking holes located at the ends of the support legs. When the outer clip and the inner clip are snap-fitted together, the guide strips on the two support arms are inserted into the guide grooves of the support legs, and the hooks are engaged in the corresponding locking holes. This prior art absorbable hemostatic clip, through the above structure, effectively avoids lateral slippage during the assembly of the inner and outer clips, ensuring positional correspondence and snap-fit ​​stability.

[0003] CN 221963661 U discloses an absorbable hemostatic clip with good anti-detachment performance, comprising an outer clip and an inner clip, both with U-shaped openings. The outer clip has a groove 1 with its opening facing right, and guide strips on the inner sides of the two side arms of the outer clip. The inner side of the guide strips has teeth 1 with their tips facing the bottom of the groove 1. The support arms have grooves 2. The outer sides of the two support legs of the inner clip have guide grooves adapted to the guide strips, and the bottom of the guide grooves has teeth 2. When the inner clip and the outer clip are assembled and closed, the guide strips on the support arms slide into the guide grooves on the support legs, and the teeth 2 and teeth 1 engage with each other. In use, the guide strips slide into the guide grooves to prevent lateral relative slippage during the assembly of the inner and outer clips; the teeth 2 and teeth 1 engage with each other to prevent the inner clip from rebounding and slipping out of the outer clip after closure; the grooves 2 provide elastic deformation space for the corresponding guide strips, thereby increasing the tightness of the support arms on the support legs and the clamping force.

[0004] CN 118236114 A discloses an inner and outer clamp structure for a hemostatic clip, including an inner clamp and an outer clamp. The outer clamp includes a left limiting strip and a right limiting strip arranged symmetrically and in parallel. One end of the left limiting strip and the right limiting strip are connected to each other, and the other end of the left limiting strip and the right limiting strip are separated into open shapes. A slide rail is provided on the opposite side between the left limiting strip and the right limiting strip along the length direction. The inner clamp includes a left clamping strip and a right clamping strip arranged symmetrically. Multiple sliders that cooperate with the slide rails and protrude are provided on the outer side of the left clamping strip and the right clamping strip. A first groove is provided on the upper or lower side of the separated end of the left clamping strip and the left limiting strip and the right limiting strip. An inner protrusion that cooperates with the first groove is provided on the inner side of the separated open end of the left limiting strip and the right limiting strip.

[0005] The aforementioned existing absorbable hemostatic clips anastomose blood vessels and other tissues by applying a closing force between the outer clip and the inner clip through the outer clip. The inner clip, which comes into contact with the blood vessels and other tissues, is made of a flexible polymer material, allowing for anastomosis without damaging the blood vessels. Correspondingly, the outer clip typically possesses greater strength and is less prone to deformation, while the inner clip is usually easily deformed and relatively soft. However, existing absorbable hemostatic clips use a snap-fit ​​mechanism for both the inner and outer clips, with the clips sliding along the snaps to prevent them from disengaging. Because the inner clip is relatively soft, the snaps on it easily deform during the closing process, causing the snap-fit ​​mechanism to easily disengage due to the deformation of the inner clip. In practice, this snap-fit ​​mechanism often proves to be largely ineffective. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a hemostatic clip that prevents slippage, so as to solve the problem of slippage between the inner and outer clips caused by buckle deformation in the prior art.

[0007] To solve the above-mentioned technical problems, this utility model proposes an anti-detachment hemostatic clip, including an inner clip and an outer clip. The inner clip has two inner clip arms that can be pressed and closed, and the outer clip has two outer clip arms that press and close the inner clip arms of the inner clip. The outer sides of the two inner clip arms of the inner clip are provided with a closed sleeve. When the outer clip arms press and close the inner clip arms, the outer clip arms of the outer clip slide inside the sleeve.

[0008] Preferably, the sleeve extends along the entire length of the inner clamping arm, and the outer clamping arm of the outer clamp is completely inserted inside the sleeve.

[0009] Preferably, a sliding snap-fit ​​structure is provided between the inner clip and the outer clip.

[0010] Preferably, the sliding snap-fit ​​structure includes a sliding groove disposed on the outer side of the two inner clamping arms of the inner clamp, and a flange disposed on the inner side of the two outer clamping arms of the outer clamp that engages with the sliding groove.

[0011] Preferably, the head of the outer clamp is configured as a hook-shaped structure, including an inner hook extending integrally along the flange and outer hooks located on both sides of the inner hook; the bottom of the sliding groove of the inner clamp is provided with a plurality of openings for the inner hook to be inserted.

[0012] Preferably, the bottom of the sliding groove is provided with three openings spaced apart.

[0013] Preferably, the opening at the bottom of the sliding groove forms a first inclined surface along the sliding direction and a second inclined surface along the opposite sliding direction, wherein the first inclined surface has a smaller slope than the second inclined surface.

[0014] Preferably, the slope angle α of the first inclined surface relative to the bottom of the sliding groove is 60-70 degrees, and the slope angle β of the second inclined surface relative to the bottom of the sliding groove is 75-105 degrees.

[0015] The sleeve structure of this utility model can completely avoid the problem of slippage between the inner and outer clamps. Even if the inner clamp undergoes a large deformation, the outer clamp cannot break free from the constraint of the sleeve no matter how it moves because the outer clamp is inserted in the sleeve. This completely avoids the problem of failure of the inner and outer clamp buckles in the prior art. Attached Figure Description

[0016] The accompanying drawings are intended only to illustrate and explain this application and do not limit the scope of this utility model.

[0017] Figure 1 The diagram shown is an exploded view of an anti-loosening hemostatic clip according to a specific embodiment of the present invention.

[0018] Figure 2 The diagram shown is a cross-sectional view of the inner clamp of the anti-loosening hemostatic clip according to another specific embodiment of the present invention. Detailed Implementation

[0019] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, specific embodiments are now described with reference to the accompanying drawings. Identical components are denoted by the same reference numerals.

[0020] like Figure 1-2 As shown, this utility model proposes an improved anti-detachment hemostatic clip. Similar to existing technologies, the anti-detachment hemostatic clip of this utility model also includes an inner clip 1 and an outer clip 2. The inner clip 1 has two inner clip arms 11 that can be pressed and 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 surgery, when operating the hemostatic clip, the outer clip 2 is pushed towards the inner clip 1 by applying clamps (not shown in the figure), so that the two inner clip arms 11 slide between the two outer clip arms 21. Thus, the two outer clip arms 21 clamp the two inner clip arms 11 made of flexible material through strong action, closing blood vessels and other tissues between the two inner clip arms 11.

[0021] Similar to existing technologies, both the inner clip 1 and the outer clip 2 are made of biodegradable polymer materials, which can be left in the patient's body after surgery and gradually absorbed by the body. The selection of materials for absorbable vascular clips can refer to existing technologies, and none of them are within the scope of the utility model claim; therefore, they will not be elaborated upon here.

[0022] In addition, similar to existing technologies, a sliding engagement structure is provided between the inner clamp 1 and the outer clamp 2 to prevent them from disengaging during the fitting operation. As shown in the figure, the sliding engagement structure includes sliding grooves 12 located on the outer sides of the two inner clamp arms 11 of the inner clamp 1, and flanges 22 located on the inner sides of the two outer clamp arms 21 of the outer clamp 2 that engage with the sliding grooves 12. When the two inner clamp arms 11 of the inner clamp 1 slide into the two outer clamp arms 21 of the outer clamp 2, the flanges 22 of the outer clamp arms 21 can engage with the sliding grooves 12 of the inner clamp arms 11, thereby preventing the inner clamp 1 from sliding laterally relative to the outer clamp 2 and achieving an anti-slip effect.

[0023] To prevent the outer clamp 2 from retracting when sliding along the sliding groove 12, the head of the outer clamp 2 is designed as a hook structure, including an inner hook 221 extending integrally along the flange 22 and outer hooks 222 located on both sides of the inner hook 221. Corresponding to the inner hook 221, the bottom of the sliding groove 12 of the inner clamp 1 is provided with multiple openings 121 at intervals for the inner hook 221 to be inserted. When the flange 22 slides along the sliding groove 12, the inner hook 221 falls into the opening 121, creating a jamming effect, thereby preventing the inner clamp 1 from retracting. In the specific embodiment shown in the figure, the bottom of the sliding groove 12 is provided with three openings 121 at intervals, thus creating three jamming effects during operation. The operator can be certain that the inner clamp 1 has completely entered the outer clamp 2 by feeling the three jamming effects, thereby judging the progress of the matching operation.

[0024] When the outer hooks 222 located on both sides of the inner hook 221 slide, they are stuck on the two side walls of the sliding groove 12. Therefore, by setting the height of the outer hooks 222, the depth of the inner hook 221 falling into the opening 121 can be controlled, so as to control the force when the outer clamp 2 slides.

[0025] Furthermore, 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 opposite sliding direction. The first inclined surface 1211 has a smaller slope than the second inclined surface 1212, thus facilitating the inner hook 221 to fall into the opening 121 along the sliding direction, but making it difficult for it to retract in the opposite sliding direction. In a 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. These angle ranges have been tested and found to provide better locking effect and relatively superior operational performance.

[0026] Of course, as described in the background art, since the material used for the inner clamp 1 is usually soft and easily deformed, even if a sliding snap-fit ​​structure is provided between the inner clamp 1 and the outer clamp 2, when the inner clamp 1 undergoes a large deformation, the sliding groove 12 on the inner clamp 1 is not sufficient to ensure that the flange 22 of the outer clamp 2 is constrained within it. Therefore, it is inevitable that the inner clamp 1 will slip out of the outer clamp 2.

[0027] To address this problem, this application provides a solution where a closed sleeve 13 is provided on the outer sides of both inner clamping arms 11 of the inner clamp 1. When the outer clamping arm 21 presses against and closes the inner clamping arms 11, the outer clamping arm 21 of the outer clamp 2 slides inside the sleeve 13. This sleeve structure completely avoids the problem of slippage between the inner clamp 1 and the outer clamp 2. Even if the inner clamp 1 undergoes significant deformation, because the outer clamp 2 is inserted into the sleeve 13, it cannot detach from the constraint of the sleeve 13 regardless of its movement, thus completely avoiding the problem of clamp failure in the prior art.

[0028] In the illustrated embodiment, the sleeve 13 does not cover the entire length of the inner clamping arm 11 of the inner clamp 1, as long as it ensures that the inner and outer clamps will not slip off. This reduces the amount of material used and lowers the processing difficulty. Of course, if the cost is affordable, it is preferable 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 clamp 2 is completely inserted inside the sleeve 13. This creates a larger constraint range and can minimize the slippage caused by the deformation of the inner clamp 1.

[0029] The above are the main improvements made by this application compared to the prior art. Other structures of the inner and outer clamps or supporting operating tools can adopt the same or similar structures described in the prior art. Those skilled in the art can understand them based on the background art and the contents recorded in other prior art. Moreover, the relevant contents are all prior art and are not within the protection scope of this application, so there is no need to repeat the description.

[0030] Those skilled in the art should understand that although the present invention has been described with reference to multiple embodiments, not every embodiment contains only one independent technical solution. This description is provided merely for clarity; those skilled in the art should understand the specification as a whole and consider the technical solutions involved in each embodiment as being able to be combined with each other to form different embodiments to understand the scope of protection of the present invention.

[0031] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A hemostatic clip for preventing detachment, comprising an inner clip (1) and an outer clip (2), wherein the inner clip (1) has two compressible inner clip arms (11), 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, The two inner clamp arms (11) of the inner clamp (1) are provided with a closed sleeve (13) on the outside. When the outer clamp arm (21) presses and closes the inner clamp arm (11), the outer clamp arm (21) of the outer clamp (2) slides through the inside of the sleeve (13).

2. The anti-detachment hemostatic clip as described in 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 inside the sleeve (13).

3. The anti-detachment hemostatic clip as described in any one of claims 1-2, characterized in that, A sliding snap-fit ​​structure is provided between the inner clamp (1) and the outer clamp (2).

4. The anti-detachment hemostatic clip as described in claim 3, characterized in that, The sliding snap-fit ​​structure includes a sliding groove (12) disposed on the outside of the two inner clamp arms (11) of the inner clamp (1), and a flange (22) disposed on the inside of the two outer clamp arms (21) of the outer clamp (2) and engaging with the sliding groove (12).

5. The anti-detachment hemostatic clip as described in claim 4, characterized in that, The head of the outer clamp (2) is configured as a hook 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); the bottom of the sliding groove (12) of the inner clamp (1) is provided with a plurality of openings (121) for the inner hook body (221) to be inserted.

6. The anti-detachment hemostatic clip as described in claim 5, characterized in that, The bottom of the sliding groove (12) is provided with three openings (121) spaced apart.

7. The anti-loosening and hemostatic clip as described in claim 4 or 5, characterized in that, 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 opposite sliding direction, wherein the first inclined surface (1211) has a smaller slope than the second inclined surface (1212).

8. The anti-detachment hemostatic clip as described in claim 7, characterized in that, 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.

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