A ferrule ligation device

Abstract

The invention discloses a loop ligation device. The device comprises a first pull cable, a first pull ring, a second pull cable, a second pull ring, a loop, a loop locking device, a first inner tube, a second inner tube and a spring tube. The device is characterized in that the loop locking device comprises a damper, a loop lock upper slide and a loop lock lower slide; one end of the loop is a fixed end, and is fixed on the loop lock lower slide; the first pull cable is connected with a thread loop which is fixed on the loop lock lower slide by virtue of the first pull ring; the other end of the loop is a free end, runs through the intermediate hole of the loop lock upper slide and is connected with the second pull cable through the second pull ring; a slide guiding groove is formed in the loop lock upper slide; and the end part of the slide guiding groove has a stop structure protruded from the plane height, so that the loop lock lower slide is limited to move in the slide guiding groove in the loop lock upper slide and does not exceed end faces at two ends of the loop lock upper slide.

Description

technical field [0001] The invention relates to a medical device, in particular to a ligation device which can repeatedly adjust the size of a ferrule and effectively ligate and fix tissues during ligation. Background technique [0002] Gastrointestinal polyps are the most common benign tumors, some of which, especially adenomatous polyps, can become cancerous, and endoscopic resection is usually performed for such lesions. Common complications of endoscopic polypectomy include bleeding, perforation, and infection. Among them, bleeding is one of the most common and serious complications, with an incidence rate of 0.3%-6.1%. The risk of bleeding after endoscopic high-frequency electrosurgical resection of thick-pedicled or wide-based polyps is higher. The nylon ferrule was used to ligate the polyp first to block the blood flow at the root, and then to perform high-frequency resection to prevent bleeding. Among them, nylon ferrule ligation combined with metal clips can avoi...

AI Technical Summary

Problems solved by technology

The structure of this nylon ferrule is relatively simple, but the ferrule ligation process is by pulling the ferrule, and the elastic body remains motionless under the limit action of the spring tube, so that the ferrule becomes smaller. Control the movement of the ferrule in the elastic body. If the force between the ferrule and the elastic body is large, it will be difficult for the doctor to operate. If the force is small, the size of the ferrule is not easy to fix after the tissue is ligated, which will eventually cause slippage and delay sexual bleeding

At the same time, the size adjustment process of the above-mentioned nylon ferrule is one-way. Once the tissue is deviated during the ligation process, the size of the ferrule cannot be readjusted to suit the tissue size.

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