Membrane-coverage bivalve anti-backflow nickel-titanium memory alloy esophageal stent

Abstract

The invention relates to a medical apparatus and particularly relates to a membrane-coverage bivalve anti-backflow nickel-titanium memory alloy esophageal stent. A medical silicone rubber membrane (1) is arranged on a tubular mesh support (2) woven through titanium-nickel alloy wires and an elastic valve A (4) is arranged at the lower end of the tubular mesh support (2). The esophageal stent is characterized in that a layer of elastic valve B (3) is arranged at the upper end of the elastic valve A (4). The esophageal stent has the advantages that backflow of food, in particular to liquids, can be well prevented.

Description

technical field [0001] The invention relates to a medical device, that is, a film-coated double-valve anti-reflux nickel-titanium memory alloy esophageal stent. Background technique [0002] The traditional anti-reflux nickel-titanium memory alloy esophageal stent is provided with a medical silicone rubber membrane on a round tubular mesh support frame woven with titanium nickel memory alloy wire, and an elastic valve A is set at the lower end of the round tubular mesh support frame. When eating normally, the elastic valve automatically opens under the force of swallowing and the gravity of the food, so that the food can enter the stomach smoothly. Food and food are not easy to return, and have the anti-reflux effect of the cardia sphincter, but the single-layer elastic valve has poor anti-reflux effect, especially for liquid anti-reflux effect. Contents of the invention [0003] In order to overcome the shortcomings of the traditional anti-reflux nickel-titanium memory a...

AI Technical Summary

Problems solved by technology

[0002] The traditional anti-reflux nickel-titanium memory alloy esophageal stent is provided with a medical silicone rubber membrane on a round tubular mesh support frame woven with titanium nickel memory alloy wire, and an elastic valve A is set at the lower end of the round tubular mesh support frame. When eating normally, the elastic valve automatically opens under the action of swallowing force and food gravity, so that food can enter the stomach smoothly. It has the anti-reflux effect of the cardia sphincter, but the single-layer elastic valve has poor anti-reflux effect, especially for liquids.

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