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Medical ligating clip

A ligation clip and clip arm technology, which is applied in medical science, wound clips, surgery, etc., can solve the problems of insufficient clipping stability and firmness, and achieve the advantages of clinical use, reasonable structural design, and enhanced locking and stability. sexual effect

Active Publication Date: 2015-12-02
BEIJING GUANGHUI TIANCHENG MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems in use, mainly due to the insufficient stability and firmness of the clipping, and slippage will occur; the clips exist in the body for a long time, because the edges and corners on the structure will wear the tissue for a long time, so it is necessary to ligate Improve the design of the product structure of the clamp

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0036] In order to achieve the purpose of the present invention, a medical ligature clip and its preparation method are provided. The ligature clip is composed of an elastic polymer with high hardness. In this embodiment, a polyoxymethylene copolymer material is used and molded into a mold of a specific shape through melt injection In the cavity, the key process parameters are set as follows: the mold preheating temperature is 120°C, the melting temperature is 210°C, the injection pressure is 100MPa, the pressure holding time is 20s, and the hot runner system is used, but the specific material properties and product molding process influence factors It needs to be fully considered, as shown in the table below, to obtain a formed ligation clip. The molded medical ligation clips are sealed and packaged, and can be used clinically after being sterilized with ethylene oxide.

[0037] Table 1 Analysis of influence factors of polyoxymethylene elastomer on injection molding process ...

Embodiment 2

[0039] The mechanical property of embodiment 2 medical ligation clips

[0040] In a preferred embodiment of the present invention, the medical ligation clip has better mechanical properties:

[0041] 1) Clamping performance: After the ligation clip clamps a 3-0 medical suture thread, hold any end of the thread and hang the thread naturally, and the ligation clip held by the thread does not have any sliding phenomenon.

[0042] 2) Tensile performance: After the ligation clip is clamped, the product is pulled apart at a speed of 50mm / min with a tension meter, and the lock of the clip will not be disengaged under a tension of 25N.

[0043] 3) Fatigue resistance performance: the ligation clip is clamped on a silicone tube with a thickness of φ6mm, a wall thickness of 0.8mm, and a hardness of 55-65 degrees Shore. After bearing the internal pressure of 50kPa for 48 hours, the lock of the ligation clip will not be disengaged or broken. .

Embodiment 3

[0044] The structural design of embodiment 3 medical ligation clips

[0045] In a preferred embodiment of the present invention, the two arc-shaped clamp arms of the medical ligation clip are designed from the circular structure of the inner surface to the outer surface and the concave-convex structure design of the centerline of the two clamp arms (as shown in the attached manual). figure 2 with 4 ), which effectively enhances the closure strength and stability of the clip, and at the same time avoids friction and damage to body tissues caused by the long-term existence of the ligation clip in the body.

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Abstract

The invention relates to a medical ligating clip which is used for surgical operation. The medical ligating clip is structurally characterized in that the medical ligating clip comprises a first clamping arm (1) and a second clamping arm (2) which are of arc structures, the outer surfaces of the clamping arms are in the shapes of circular surfaces (3), concave-convex grooves (4) are formed in the midcourt lines of the inner surfaces of the two clamping arms, the two clamping arms are connected through an elastic hinge (5), the two ends of the medical ligating clip are provided with lock catch structures (6) matched with each other, and meanwhile the two sides of the midcourt lines of the inner surfaces of the two clamping arms are provided with protruding strips (7), wherein a 20-45-degree included angle is formed between each protruding strip and the corresponding clamping arm. The medical ligating clip is formed by conducting molten plastic injection on monomer homopolymer or copolymer of one or more of high-molecular polymer polyformaldehyde, polyetherimide, polyether sulfone and polyethylene glycol terephthalate which are better in biocompatibility.

Description

technical field [0001] The invention relates to a medical device product, in particular to a medical ligation clip made of biopolymer material, which is mainly used for ligation and hemostasis of blood vessels or bile duct tissues in minimally invasive surgical operations. Background technique [0002] In order to fully expose the surgical field of view during the surgical operation, it is necessary to ligate the broken blood vessels in the incision to prevent bleeding. Hemostasis technology has become one of the cores of basic surgical techniques, and surgical operations on any part of the human body almost without exception involve bleeding and hemostasis. Generally, the broken blood vessel is clamped with a hemostat and then ligated with sutures. This method is cumbersome to operate and reduces the efficiency of the operation; another method is to block the blood flow through a ligation clip, mainly made of metal and polymer materials. , such as aneurysm clips used in an...

Claims

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Application Information

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IPC IPC(8): A61B17/122A61L17/00
CPCA61B17/00234A61B17/1227A61B2017/00849A61B2017/00871A61B2017/12004A61L17/00
Inventor 李颖陶秀梅徐小雨
Owner BEIJING GUANGHUI TIANCHENG MEDICAL TECH CO LTD
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