Wolf tooth metal claw type medical hemostatic clip assembly
By adopting the clamping segment structure of canine teeth and meshing teeth interlocking and the arcuate tail design in the hemostatic clip, the problem of the hemostatic clip being prone to deform and falling off when clamping hard tissue under the endoscopy is solved, and stronger clamping force and elastic deformation ability are achieved, reducing sleeve length.
Patent Information
- Application Number
- CN202421811094.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-30
AI Technical Summary
Existing hemostasis clips are prone to plastic deformation when operating under endoscopy or fail when clamping hard tissue, causing the clip to fall off.
The clamping segment structure consisting of canine teeth and meshing teeth is adopted. After the clamping segment is closed, the canine teeth are interlocked, and the meshing teeth are meshed with each other. Combined with the arcuate tail structure, it provides greater clamping force and elastic deformation ability.
The clamping force of the hemostasis clip is increased to prevent the clip from falling off and maintain effective clamping when elastically deformed, shortening the sleeve length and reducing the risk of deformation during endoscopic operation.
Smart Images
Figure CN223081723U_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a wolf tooth metal claw type medical hemostatic clip assembly, belonging to the technical field of medical devices. Background Art
[0002] In recent years, the development of digestive endoscopy treatment technology has been rapid, the detection rate of digestive tract lesions has become higher and higher, and there are also more and more treatment options through digestive endoscopy technology. Doctors send hemostatic clips through the endoscopic forceps channel. The hemostatic clip uses the mechanical force generated when the clamp is closed to ligate the surrounding tissues of the wound surface, so as to achieve the purpose of hemostasis and tissue suture. Due to its characteristics such as small trauma, fast hemostasis speed, low incidence of rebleeding, few complications, and definite curative effect, the hemostatic clip has become the most effective method for treating digestive tract diseases.
[0003] Due to the small operation space under the endoscope and the small working channel of the endoscope, the clamp is prone to plastic deformation in the curved cavity of the human body, or when grasping harder tissues, the clip will undergo plastic deformation and fail. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a wolf tooth metal claw type medical hemostatic clip assembly. The clamping section at the head of the medical hemostatic clip adopts a composition structure of canine teeth and meshing teeth, so that the canine teeth at both ends are interlocked after the clamping section is closed, and the meshing teeth are meshed with each other, thereby ensuring that even if the clamp undergoes large elastic deformation, the clip will not fall off.
[0005] To solve the above problems, the specific technical solution of the present invention is as follows: A wolf tooth metal claw type medical hemostatic clip assembly includes two symmetrical clamps, a sleeve, and a traction device. The clamp is integrally connected by a head and a tail; the head is composed of a smooth transition section and an inwardly bent clamping section. The outer surface of the smooth transition section is consistent with the inner surface of the sleeve in shape and is connected in a sliding fit; the clamping section is a toothed structure, with canine teeth on both sides, and the two canine teeth of the same clamping section are staggered front and back; several meshing teeth are provided between the two canine teeth of the same clamping section; the end faces of the meshing teeth of the two clamping sections are closed, and the canine teeth of the two clamping sections are staggered and closed.
[0006] The meshing teeth as a whole form a U-shaped structure after the two clamping sections are closed.
[0007] After the clamp is closed, the canine teeth on one side of one clamping section are located outside the meshing surface, and the canine teeth on the other side are located inside the meshing surface.
[0008] The length of the canine teeth is greater than the length of the meshing teeth.
[0009] The tail is an arc-shaped structure.
[0010] A transition surface is provided at the connection between the tail part and the smooth transition section. A supporting section extending outwards is provided at the part of the tail part far from the clamping section. An S-shaped structure is provided between the transition surface and the supporting section. The transition surface, the S-shaped structure and the supporting section integrally form an arcuate structure.
[0011] The end part of the supporting section and the inner wall of the sleeve form a first contact point; the lowest bending points of the S-shaped structures of the two tail parts form a second contact point; the transition surface of each tail part and the inner wall of the sleeve form a third contact point.
[0012] The wolf-tooth metal claw type medical hemostatic clip assembly of the present application adopts the above structure and has the following advantages:
[0013] 1. The canine teeth are arranged staggeredly in the front and back at the clamping section. After closing, front-back interlocking is realized. During the process of clamping tissue, a greater clamping force is generated at the clamping part. The staggered arrangement of the canine teeth in the front and back will clamp the tissue and prevent it from falling off.
[0014] 2. The tail part adopts an arcuate multi-curved surface structure, making it more elastic. When the included angle between the two clips is squeezed by the mucosal tissue to 180°, no plastic deformation will occur.
[0015] 3. Due to the unique arcuate structure, the clip can generate a greater elastic deformation within an effective distance, thereby shortening the length of the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural diagram of the wolf-tooth metal claw type medical hemostatic clip assembly in the open state.
[0017] Figure 2 It is the front view of the two clamps in the closed state.
[0018] Figure 3 It is the top view of the two clamps in the closed state.
[0019] Figure 4 It is the cross-sectional view of a single clamp.
[0020] Figure 5 It is a structural diagram of the wolf-tooth metal claw type medical hemostatic clip assembly in the closed state.
[0021] Figure 6 It is the comparison test diagram of Product 1.
[0022] Figure 6 In it, a is the diagram of the clamp of Product 1 being unfolded under an external force; b is the diagram of the clamp of Product 1 restoring elasticity without an external force; c is the diagram of the clamp of Product 1 retracting and resetting.
[0023] Figure 7 It is the comparison test diagram of Product 2.
[0024] Figure 7In figure a, it shows the expanded view of the clamp of product 2 under external force; in figure b, it shows the elastic recovery of the clamp of product 2 without external force; in figure c, it shows the plastic deformation of the clamp of product 2.
[0025] Figure 8 This is the comparative experiment diagram of the wolf-tooth metal claw type medical hemostatic clip assembly of the present application.
[0026] Figure 8 In figure a, it shows the expanded view of the clamp of the present application under external force; in figure b, it shows the elastic recovery of the clamp of the present application without external force; in figure c, it shows the retraction and reset of the clamp of the present application.
[0027] Figure 9 It is the retraction and reset diagram of the clamp of product 2. Detailed implementation mode
[0028] As Figures 1 to 4 shown, a wolf-tooth metal claw type medical hemostatic clip assembly includes two symmetrical clamps 1, a sleeve 2, and a traction device 3. The clamp 1 is integrally connected by a head 11 and a tail 12. The head 11 is composed of a smooth transition section 111 and an inwardly curved clamping section 112. The outer surface of the smooth transition section 111 has the same shape as the inner surface of the sleeve 2 and is slidably connected. The clamping section 112 is a toothed structure, with canine teeth 1121 on both sides, and the two canine teeth 1121 of the same clamping section 112 are staggered front and back. Between the two canine teeth 1121 of the same clamping section 112, there are several meshing teeth 1122. The end faces of the meshing teeth 1122 of the two clamping sections 112 are closed, and the canine teeth 1121 of the two clamping sections 112 are staggered and closed.
[0029] The meshing teeth 1122 as a whole form a U-shaped structure after the two clamping sections 112 are closed. After the clamp 1 is closed, one of the canine teeth 1121 on one side of a clamping section 112 is located outside the meshing surface, and the canine tooth 1121 on the other side is located inside the meshing surface. The length of the canine tooth 1121 is greater than the length of the meshing tooth. The canine teeth of the clamp 1 imitate the canine tooth structure of a wolf and can achieve a strong biting force on an object.
[0030] A transition surface 122 is provided at the connection between the tail 12 and the smooth transition section 111. An outward support section 121 is provided at the end of the tail 12 away from the clamping section 112. An S-shaped structure 123 is provided between the transition surface 122 and the support section 121. The transition surface 122, the S-shaped structure 123, and the support section 121 as a whole form an arcuate structure. The tail 12 as a whole imitates the arcuate structure, which has good support force and strong elasticity.
[0031] As Figure 5As described above, when the clamp 112 needs to be closed, under the pulling force of the traction device 3, the smooth transition section 111 of the head 11; the transition curved surface 122 of each tail 12 forms a first contact point 13 with the inner wall of the sleeve 2; the lowest point of the bending of the S-shaped structure 123 of the two tails 12 forms a second contact point 14; the end of the support section 121 forms a third contact point 15 with the inner wall of the sleeve 2. The first contact point 13 plays a role in closing and clamping; the second contact point 14 provides sufficient outward elastic force for the clamp 112 to separate from the sleeve 2, so that the clamp 112 separates from the sleeve 2 and opens quickly; the third contact point 15 is subjected to the downward pressure of the inner wall of the sleeve, and cooperates with the unique S-shaped lever structure to provide greater bite force for the canine teeth 1121 and the meshing teeth 1122 of the head 11, thereby increasing the clamping force after the clamp is closed, so that the clamp is not easy to fall off.
[0032] Comparative test: Two different models of medical hemostatic clip assemblies, product 1 and product 2, were compared with the wolf tooth metal claw type medical hemostatic clip assembly of the present application.
[0033] 1. Clamping force test: Product 1, Product 2 and the medical hemostatic clip assembly of the present application were used to conduct clamping tests on pig intestines. A heavy object was hung at the tail of each medical hemostatic clip assembly to test the force of each medical hemostatic clip assembly falling off from the pig intestine, as shown in the table below. The test results show that the wolf tooth metal claw medical hemostatic clip assembly has a greater clamping force, and the clip is not easy to fall off after biting.
[0034]
[0035] 2. Stress deformation test: Figure 6 As shown in a, product 1 is squeezed and the two clamps are extended to 180°; Figure 6 As shown in b, when the external force of product 1 is withdrawn, the two clamps of product 1 can still restore the opening of 13mm; Figure 6 As shown in c, the two clamps of product 1 are closed and no plastic deformation occurs;
[0036] like Figure 7 As shown in a, product 2 is squeezed and the two clamps are extended to 180°; Figure 7 As shown in b, the external force on product 2 is withdrawn, and the opening width of the two clamps of product 2 has increased to 17.5mm; Figure 7 As shown in c, the clamp of product 2 cannot be closed and plastic deformation occurs.
[0037] like Figure 8 As shown in a, the medical hemostatic clip assembly of the present application is squeezed under force, and the two clamps have been extended to 180 degrees; Figure 8 As shown in b, when the external force of the medical hemostatic clip assembly of the present application is withdrawn, the two clamps can still restore the opening of 13mm; Figure 8As shown in c, the two clamps of Product 1 are closed and no plastic deformation occurs.
[0038] The test results show that the medical hemostatic clip assembly of the present application has strong anti-deformation ability compared with Product 1.
[0039] 3. As Figure 6 shown in c, the sleeve length of Product 1 is 6.5 mm; as Figure 9 shown, the sleeve length of Product 2 is 7.5 mm; as Figure 8 shown in c, the sleeve length of the medical hemostatic clip assembly of the present application is 5.5 mm. It shows that under the condition of the same opening angle of the two clamps, the smaller the sleeve length left in the body for the medical hemostatic clip assembly of the present application is better. Due to the unique bow-shaped structure of the present application, the clip can generate greater elastic deformation within an effective distance, thus the sleeve length can be shortened.
Claims
1. A kind of wolf tooth metal claw type medical hemostatic clip assembly, comprising two symmetrical clamps (1), a sleeve (2), and a traction device (3), characterized in that: The clamp (1) is integrally connected by a head (11) and a tail (12); the head (11) consists of a smooth transition section (111) and an inwardly curved clamping section (112). The outer surface of the smooth transition section (111) has the same shape as the inner surface of the sleeve (2) and is connected in a sliding fit; the clamping section (112) has a toothed structure, with canine teeth (1121) on both sides, and the two canine teeth (1121) of the same clamping section (112) are staggered front and back; several meshing teeth (1122) are provided between the two canine teeth (1121) of the same clamping section (112); the end faces of the meshing teeth (1122) of the two clamping sections (112) are closed, and the canine teeth (1121) of the two clamping sections (112) are staggered and closed.
2. The metal claw-shaped medical hemostatic clip assembly according to claim 1, characterized in that: The meshing teeth (1122) as a whole form a U-shaped structure after the two clamping sections (112) are closed.
3. The metal claw-shaped medical hemostatic clip assembly according to claim 1, wherein: After the clamp (1) is closed, the canine teeth (1121) on one side of one clamping section (112) are located outside the meshing surface, and the canine teeth (1121) on the other side are located inside the meshing surface.
4. The metal claw-shaped medical hemostatic clip assembly according to claim 1, characterized in that: The length of the canine teeth (1121) is greater than the length of the meshing teeth.
5. The metal claw-shaped medical hemostatic clip assembly according to claim 1, characterized in that: The said tail (12) has an arcuate structure.
6. The metal claw type medical hemostatic clip assembly according to claim 4, wherein: A transition surface (122) is provided at the connection between the tail (12) and the smooth transition section (111). An outward support section (121) is provided at the end of the tail (12) away from the clamping section (112). An S-shaped structure (123) is provided between the transition surface (122) and the support section (121). The transition surface (122), the S-shaped structure (123) and the support section (121) as a whole form an arcuate structure.
7. The metal claw-shaped medical hemostatic clip assembly according to claim 6, wherein: The end part of the support section (121) forms a first contact point (13) with the inner wall of the sleeve (2); the lowest bending points of the S-shaped structures (123) of the two tails (12) form a second contact point (14); the transition surface (122) of each tail (12) forms a third contact point (15) with the inner wall of the sleeve (2).