Anti-reflux esophageal stent

Abstract

The invention discloses an anti-reflux esophageal stent. The anti-reflux esophageal stent comprises a film-covered esophageal stent body and an anti-reflux valve film, wherein the film-covered esophageal stent body is of a reticular structure woven by metal wires, and is integrally covered by a silicone soft film, the middle of the film-covered esophageal stent body is cylinder-shaped, two ends ofthe film-covered esophageal stent body are barrel-shaped, the upper end of the anti-reflux valve film is fixed at the joint of an upper-end pipe body and a middle pipe body of the film-covered esophageal stent body, the anti-reflux valve film is composed of a metal wire framework and a silicone soft film, the silicone soft film covers the metal wire framework through thermal treatment, the diameter of the upper port of the anti-reflux valve film has the same width with the inner diameter of the middle pipe body of the film-covered esophageal stent body, the lower port of the anti-reflux valvefilm is closed, then the funnel shape is formed, and the tail end of the metal wire framework is of a hook-shaped structure. The anti-reflux esophageal stent is simple in structure, convenient to operate, and low in manufacturing cost, and can effectively prevent food reflux caused by stomach peristalsis.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to an anti-reflux esophageal stent. Background technique [0002] At present, in the field of medicine, for esophageal stenosis caused by esophageal cancer, multiple esophageal stents are implanted to solve the problem of esophageal obstruction and make the patient's esophagus smooth. After a normal person eats, the esophageal sphincter at the junction of the stomach and esophagus closes, and food will not flow back into the esophagus to cause vomiting. After the patient eats, the food will regurgitate due to gastric peristalsis, and the food will enter the mouth from the stent, causing the patient to vomit. It may also cause esophagitis due to food reflux, which will bring pain to the patient. Contents of the invention [0003] In order to solve the problems in the prior art, the present invention provides a reflux esophageal stent with simple structure and good anti-r...

AI Technical Summary

Problems solved by technology

After a normal person eats, the esophageal sphincter at the junction of the esophagus and the stomach closes, and food will not flow back into the esophagus to cause vomiting. However, for the narrow junction of the esophagus and gastric cardia, the esophageal stent will destroy the sphincter of the esophagus and cardia after implantation. After the patient eats, the food will reflux due to gastric peristalsis, and the food will enter the mouth from the stent, causing the patient to vomit. It may also cause esophagitis due to food reflux, which will bring pain to the patient

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