Extendable gastrointestinal stent and its use

By installing a second cannula connected by a biodegradable material in the digestive tract cannula, the cannula length is extended, which solves the problem of increased intestinal absorption capacity, achieves long-term reduction of intestinal digestion and absorption, and improves the treatment effect of obesity and type II diabetes.

CN117122455BActive Publication Date: 2026-03-20HANGZHOU TANGJI MEDICAL TECH CO LTD
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Patent Information

Application Number
CN202311159684.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-08
Publication Date
2026-03-20
Estimated Expiration
2043-09-08

AI Technical Summary

Technical Problem

Existing digestive tract cannulas, once inserted into the digestive tract, gradually reduce the intestines' ability to absorb food over time, thus diminishing their effectiveness in treating obesity and type II diabetes.

Method used

An extendable digestive tract cannula is designed by setting a second cannula connected to the distal end of the cannula with a biodegradable material. The biodegradable material degrades after a certain period of time, pushing the second cannula to move distally, extending the cannula length, weakening the intestinal compensatory absorption function, and improving the isolation effect between chyme and the intestine.

Benefits of technology

By extending the length of the cannula, the compensatory absorption of the distal digestive tract is continuously reduced, thereby achieving a long-term decrease in intestinal digestion and absorption and improving the therapeutic effect.

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Abstract

The application provides an extendable digestive tract cannula and application thereof, and relates to the technical field of medical devices. The application comprises a first cannula, a second cannula and a degradable material. Opposite ends of the first cannula are a proximal end and a distal end, respectively. The first cannula is sleeved with the second cannula, and a double-layer structure is formed at the distal end of the first cannula. The double-layer structure is fixed by the degradable material. When the degradable material degrades, the second cannula moves towards the end face of the distal end of the first cannula. By setting the movable second cannula, the second cannula moves backward after the degradable material degrades, so that the length of the digestive tract cannula is extended. Since the length of the digestive tract cannula is increased, the area of intestinal absorption is also increased, the compensatory absorption function of the intestine at the distal end of the digestive tract cannula is weakened, the isolation effect of chyme and the intestine is improved, and the digestion and absorption effect of the intestine can be reduced for a long time.
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