Absorbable hemostatic clip

Abstract

The utility model relates to an absorbable hemostatic clip, comprising an inner clip and an outer clip, wherein the inner clip comprises a first clamping strip and a second clamping strip symmetrically arranged and connected to each other at one end, wherein the first clamping strip and the second clamping strip are respectively provided with a hook portion bent inwardly and a clamping portion cooperating with the hook portion to form a buckle structure at one end separated from each other, and the outer clip is provided with a limiting cavity that can abut against the first clamping strip and the second clamping strip. The utility model has the characteristics of being able to completely clamp a blood vessel and prevent the blood vessel from slipping off the hemostatic clip.

Description

Technical Field

[0001] The utility model relates to an absorbable hemostatic clip and belongs to the technical field of medical equipment. Background Art

[0002] Currently, existing hemostatic clips on the market are usually divided into absorbable and non-absorbable. Absorbable hemostatic clips are made of absorbable polymer materials. Since they need to remain in the patient's body to maintain the clamping function, absorbable hemostatic clips are needed so that the human body can automatically absorb the hemostatic clips after a certain period of time to avoid affecting the human body. Common hemostatic clips are composed of a single clip with a locking buckle. The material is soft in texture, and the deformation is large after clamping the blood vessel, and there is a risk of failing to completely clamp the blood vessel.

[0003] For example, a Chinese patent application with publication number CN117530743A discloses a ligation clamp, which includes a first clamp arm, a second clamp arm and a first connecting portion, wherein the first clamp arm is connected to the second clamp arm via the first connecting portion, and an end of the second clamp arm away from the first connecting portion can be detachably connected to an end of the first clamp arm away from the first connecting portion; positioning members are provided on both sides of the first clamp arm along the Z direction or on both sides of the second clamp arm along the Z direction or on one side of the second clamp arm away from the first clamp arm, and the positioning members can limit the movement of the end of the second clamp arm away from the first connecting portion along the Z direction.

[0004] Another common hemostatic clip consists of a harder outer clip and a softer inner clip, without a locking interface. The harder outer clip provides the clamping force to clamp the blood vessel, and there is a risk of the blood vessel slipping out from the opening side.

[0005] For example, a Chinese patent application with publication number CN210277255U discloses a sleeve-type hemostatic ligation kit, comprising: a hemostatic ligation clamp device, the hemostatic ligation clamp device comprising: an outer sleeve, an inner clamp, an outer clamp and a piston; a clamp applier device comprising: a lumen and a push pin for pushing the piston to move; the lumen is formed with a second central through hole extending along a first straight line; the outer sleeve comprises an exposed end and an installation and fixing end inserted into the lumen; the outer periphery of the installation and fixing end is formed with a concave sleeve groove recessed in the outer surface of the installation and fixing end; the inner surface of the lumen is formed with a sleeve adapted to the concave sleeve groove.

[0006] The above-mentioned existing technologies cannot completely clamp the blood vessels, and there is a problem of blood vessels slipping out and detaching, which has a certain impact on surgical operations and still poses a safety risk. Utility Model Content

[0007] The utility model aims to provide an absorbable hemostatic clip, which solves the problems of the prior art that the blood vessels cannot be completely clamped and the blood vessels are easy to slip.

[0008] The above-mentioned technical purpose of the utility model is mainly solved by the following technical solutions: an absorbable hemostatic clip, including an inner clip and an outer clip, the inner clip including a first clamping strip and a second clamping strip symmetrically arranged and connected to each other at one end, the first clamping strip and the second clamping strip separated from each other are respectively provided with a hook portion bent inwardly and a clamping portion cooperating with the hook portion to form a buckle structure at one end, and the outer clip is provided with a limiting cavity that can abut against the first clamping strip and the second clamping strip; the above-mentioned inner clip clamps the blood vessel through the first clamping strip and the second clamping strip, and after the first clamping strip and the second clamping strip are closed, they can enter the limiting cavity and limit the outer walls of the first clamping strip and the second clamping strip through the outer clip to maintain the clamping state of the first clamping strip and the second clamping strip on the blood vessel, and the hook portions and the clamping portions at the ends of the first clamping strip and the second clamping strip can be mutually clamped to form a buckle structure to lock the ends of the first clamping strip and the second clamping strip separated from each other, so that the inner clamp can be limited by the outer clamp to avoid the inner clamp being unable to completely clamp the blood vessel due to its softness, and the blood vessel can be locked by the clamping portion and the hook portion to avoid the blood vessel slipping off the inner clamp, thereby ensuring the stable and reliable clamping and closure of the blood vessel.

[0009] Preferably, inclined grooves are provided on the inner walls on the upper and lower sides of the limiting cavity at positions close to the opening, and the blocking surface of the inclined grooves is close to the direction of the opening, and the outer walls of the separation ends of the first clamp and the second clamp are provided with protrusions that cooperate with the inclined grooves; the arrangement of the above-mentioned inclined grooves and protrusions allows the first clamp and the second clamp to be located on the inclined grooves through the protrusions, so that the inner clamp can be limited in the outer clamp when clamping the blood vessel and completely entering the outer clamp, thereby preventing the inner clamp from falling out of the outer clamp and enhancing the stability of the inner clamp in the outer clamp.

[0010] Preferably, the first clamping strip and the second clamping strip are provided with strip grooves arranged along the length direction on the outer walls, and the upper and lower sides of the limiting cavity are provided with strip protrusions that cooperate with the strip grooves and are arranged along the length direction; the arrangement of the above-mentioned strip grooves and strip protrusions allows the first clamping strip and the second clamping strip to move accurately along the strip protrusions in the outer clamp through the strip grooves, avoiding displacement of the inner clamp when moving, and ensuring that the inner clamp can stably enter the limiting cavity of the outer clamp.

[0011] Preferably, blocks are provided on both sides of one end where the first clamp strip and the second clamp strip are connected to each other, and a slot cooperating with the block is provided on the side of the limiting cavity away from the opening; the setting of the above-mentioned block and slot facilitates the positioning of the inner clip entering the outer clip, maintains the stable position of the inner clip in the limiting cavity of the outer clip, and avoids the inner clip from being offset.

[0012] Preferably, it includes a chuck for positioning the inner clip and the outer clip, a positioning cavity for accommodating the inner clip and the outer clip is provided inside the chuck, clamp arms are provided on both sides of the chuck, and through holes cooperating with the protrusions are provided at the ends of the clamp arms; the above-mentioned chuck is used to fix and position the inner clip and the outer clip to maintain the functional positions of the inner clip and the outer clip, and the arrangement of the clamp arms and the through holes facilitates the fixation of the inner clip to prevent the inner clip from shifting or falling out when not in use.

[0013] Preferably, a piston is provided inside the end of the chuck close to the outer clamp and can abut against the end surface of the outer clamp; the above-mentioned piston is arranged to facilitate pushing the outer clamp to move toward the inner clamp, so that the outer clamp can surround the inner clamp to maintain the clamping state of the inner clamp, and the inner clamp and the outer clamp can be removed from the chuck after clamping the blood vessel through the piston.

[0014] Therefore, the utility model has the characteristics of being able to completely clamp the blood vessel and prevent the blood vessel from slipping off the hemostatic clip. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the cooperation between the inner clip and the outer clip of the utility model.

[0016] Figure 2 It is a schematic structural diagram of the cooperation between the inner clamp, the outer clamp and the clamping head of the utility model.

[0017] Figure 3 yes Figure 2 Structural cross-section view.

[0018] Figure 4 yes Figure 1 Schematic diagram of the inner and outer clamps closing the blood vessel. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0020] like Figure 1 and 4 As shown, an absorbable hemostatic clip includes an inner clip 1 and an outer clip 2. The inner clip 1 includes a first clamping strip 11 and a second clamping strip 12 which are symmetrically arranged and interconnected at one end. The first clamping strip 11 and the second clamping strip 12 are separated from each other at one end and are respectively provided with a hook portion 111 bent inwardly and a clamping portion 121 that cooperates with the hook portion 111 to form a snap structure. The outer clip 2 is provided with a limiting cavity 21 that can abut against the first clamping strip 11 and the second clamping strip 12.

[0021] The above-mentioned inner clamp is made of a softer absorbable polymer material (such as polydioxanone), and the outer clamp is made of a harder absorbable polymer material (such as polyglycolide). They can be slightly deformed when subjected to force. The inner clamp and the outer clamp are arranged in sequence in the limiting cavity; when the control clamp head approaches the blood vessel, the blood vessel enters the positioning cavity from the opening of the limiting cavity and gradually moves between the first clamp and the second clamp. Then the outer clamp moves toward the inner clamp, and the upper and lower sides of the outer clamp are sleeved on the upper and lower sides of the inner clamp. As the outer clamp moves, the inner clamp gradually clamps the blood vessel until the inner clamp is completely closed. At this time, the inner clamp is completely located in the limiting cavity of the outer clamp, and the hook portion is clamped on the clamping portion to lock the ends of the first clamp and the second clamp.

[0022] like Figure 1 As shown, inclined grooves 211 are provided on the inner walls of the upper and lower sides of the limiting cavity 21 at positions close to the opening, and the blocking surface of the inclined groove 211 is close to the direction of the opening. The outer walls of the separation ends of the first clamping strip 11 and the second clamping strip 12 are provided with protrusions 112 that cooperate with the inclined grooves 211, and the outer walls of the first clamping strip 11 and the second clamping strip 12 are provided with strip grooves 113 arranged along the length direction. The upper and lower sides of the limiting cavity 21 are provided with strip protrusions 212 that cooperate with the strip grooves 113 and are arranged along the length direction, and blocks 213 are provided on both sides of one end where the first clamping strip 11 and the second clamping strip 12 are connected to each other, and a groove 214 that cooperates with the protrusion 112 is provided on the side of the limiting cavity 21 away from the opening.

[0023] When the inner clip is completely located in the limiting cavity of the outer clip, the hook portion is stuck on the clamping portion, and the protrusions on the upper and lower sides of the first clamping strip and the second clamping strip are stuck in the inclined groove, and the blocking surface of the protrusion is tightly attached to the blocking surface of the inclined groove, which can limit the inner clip, and the protrusion of the inner clip enters the inclined groove to position the inner clip, so that the inner clip cannot slip out of the limiting cavity, and the first clamping strip and the second clamping strip are stuck on the strip protrusion through the strip groove, and can move stably along the strip protrusion, and the connecting ends of the first clamping strip and the second clamping strip are provided with clamping blocks protruding on both sides, which can limit the first clamping strip and the second clamping strip in the clamping groove, thereby increasing the stability of the inner clip in the outer clip.

[0024] like Figure 2-3 As shown, it includes a chuck 3 for positioning the inner clamp 1 and the outer clamp 2, a positioning cavity 31 for accommodating the inner clamp 1 and the outer clamp 2 is provided inside the chuck 3, clamp arms 32 are provided on both sides of the chuck 3, and through holes 321 that cooperate with the clamping block 213 are provided at the ends of the clamp arms 32, and a piston 33 that can abut against the end face of the outer clamp 2 is provided inside the end of the chuck 3 close to the outer clamp 2.

[0025] The chuck is connected to the external clamp in a transmission manner, and the external clamp can drive the piston to push the outer clamp toward the inner clamp. When the outer clamp and the inner clamp move in the limiting cavity, they are limited by the track grooves on the upper and lower sides of the chuck positioning cavity. When the outer clamp first moves toward the inner clamp along the track groove, the clamping blocks on both sides of the inner clamp are located in the through hole and are fixed by the clamping arms. Since the inner clamp itself has a slight deformation ability, when the outer clamp pushes the inner clamp, the movement of the inner clamp can drive the clamping blocks to slightly deform and escape from the through hole, so that the inner and outer clamps can detach from the chuck and completely clamp the blood vessel.

Claims

1. An absorbable hemostatic clip, characterized in that: The invention comprises an inner clip (1) and an outer clip (2), wherein the inner clip (1) comprises a first clip strip (11) and a second clip strip (12) which are symmetrically arranged and connected to each other at one end, wherein the first clip strip (11) and the second clip strip (12) are provided with a hook portion (111) bent inwardly and a clamping portion (121) which cooperates with the hook portion (111) to form a buckle structure, respectively, at one end separated from each other, and wherein the outer clip (2) is provided with a limiting cavity (21) which can abut against the first clip strip (11) and the second clip strip (12).

2. The absorbable hemostatic clip according to claim 1, characterized in that: An inclined groove (211) is provided on the inner walls of the upper and lower sides of the limiting cavity (21) at a position close to the opening, and the blocking surface of the inclined groove (211) is close to the direction of the opening. The outer walls of the separation ends of the first clamping strip (11) and the second clamping strip (12) are provided with a protrusion (112) that cooperates with the inclined groove (211).

3. The absorbable hemostatic clip according to claim 1 or 2, characterized in that: The outer walls of the first clamping strip (11) and the second clamping strip (12) are both provided with strip-shaped grooves (113) arranged along the length direction, and the upper and lower sides of the limiting cavity (21) are both provided with strip-shaped protrusions (212) that cooperate with the strip-shaped grooves (113) and are arranged along the length direction.

4. The absorbable hemostatic clip according to claim 1 or 2, characterized in that: Blocks (213) are provided on both sides of one end where the first clamping strip (11) and the second clamping strip (12) are connected to each other, and a clamping groove (214) cooperating with the protrusion (112) is provided on the side of the limiting cavity (21) away from the opening.

5. The absorbable hemostatic clip according to claim 4, characterized in that: The invention comprises a clamp (3) for positioning an inner clamp (1) and an outer clamp (2); a positioning cavity (31) for accommodating the inner clamp (1) and the outer clamp (2) is provided inside the clamp (3); clamp arms (32) are provided on both sides of the clamp (3); and through holes (321) are provided at the ends of the clamp arms (32) for cooperating with the protrusions (112).

6. The absorbable hemostatic clip according to claim 5, characterized in that: A piston (33) capable of abutting against an end surface of the outer clamp (2) is provided inside the clamp head (3) at one end close to the outer clamp (2).

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