Expandable esophageal stent

Abstract

The invention discloses an expandable esophageal stent. The expandable esophageal stent comprises a stent body, an expansion air bag and a hung tube, wherein the stent body is in a cylindrical tube shape, the expansion air bag is arranged on the outer cylindrical surface of the stent body in a covering mode, the hung tube is connected with one end of the stent body, and the hung pipe is communicated with the expansion air bag. The expandable esophageal stent can be well matched with the esophageal cavity of a human body in shape, an expansion part simulating the esophagus and a spike part simulating the esophagus do not exist, and high tolerance is achieved; the hung pipe penetrates out of the nasal cavity of a patient, and is fixedly arranged outside the human body through adhesive tape and the like, and therefore the problem that due to physiological peristalsis of the esophagus, an esophageal stent moves and falls off can be solved; after the expandable esophageal stent is implanted into the esophagus for a period of time, and the expandable esophageal stent deforms due to growth of tissue around the stent body, the expansion air bag can be inflated through the hung pipe, the tissue around the expandable esophageal stent is expanded, the original shape of the stent body can be automatically recovered, and therefore the problem that the expandable esophageal stent is pressed to deform due to growth of the tissue around the expandable esophageal stent can be solved; the service life of the esophagus is long, and the treatment effect is good.

Description

technical field [0001] The invention relates to a medical device, in particular to an esophageal stent. Background technique [0002] Esophageal stenosis or esophageal tracheal fistula is a serious disease that seriously threatens the quality of life of patients and even life. Implanting an esophageal stent in the esophageal lumen is a convenient, safe, effective, and minimally invasive method for the treatment of esophageal stenosis or esophageal tracheal fistula. At present, it is widely used clinically, but this treatment method also has obvious disadvantages, such as: [0003] 1. The existing esophageal stent is prone to displacement and falling off due to physiological peristalsis of the esophagus. At present, in order to solve the problem of displacement and falling off of the esophageal stent, one or both ends of the esophageal stent are usually made into special-shaped enlarged parts, such as "trumpet-shaped", "wine glass-shaped" or "ball-shaped", etc., or in the O...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the purpose of the present invention is to provide an expandable esophageal stent to solve the problems of easy displacement, falling off and deformation of existing esophageal stents

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