Intraesophageal stent used for esophageal rupture and stomal leak plugging

Abstract

The invention discloses an intraesophageal stent used for esophageal rupture and stomal leak plugging and relates to a hollow or tubular prosthesis which can be implanted into a body, in particular to the intraesophageal stent used for lower esophageal rupture and esophageal stomal leak plugging. The intraesophageal stent comprises a stent main body and a backflow prevention device, wherein the stent main body is made of a degradable material; the stomach end of the intraesophageal stent is provided with a dumb-bell-shaped fixed structure and an intragastric part; the dumb-bell-shaped fixed structure consists of a bulb of a dumb-bell and a notch part of the dumbbell; after the stent is implanted, the notch part of the dumb-bell is clamped at a cardia position or a gastroesophageal joint position; the intragastric part is a skirt-like opening extending and expanding into a gastric cavity from the notch part of the dumbbell; after the stent is implanted, the skirt-like opening is put in the gastric cavity, and an intragastric leak seal plugging structure is formed at the joint of esophagus and the stomach; the near end of the intraesophageal stent is provided with an anti-shifting line. The intraesophageal stent disclosed by the invention can be firmly fixed, so that the stent is effectively prevented from shifting; the expanding edge of the skirt-like opening of the intragastric part can play a role of stomal leak plugging, so that the phenomenon that gastric content flows back after the stent is implanted can be effectively prevented.

Description

technical field [0001] The invention relates to a hollow or tubular prosthesis that can be implanted in the body, in particular to an esophageal internal support for the rupture of the lower esophagus and the sealing of the leak of the esophageal anastomosis. Background technique [0002] Esophageal stents are currently widely used clinical medical devices, mainly for inoperable esophageal cancer patients with strictures to solve their dysphagia and improve their quality of life. In the early days, plastic pipes were used. Since 1983, Frimberger first reported the success of using metal stents to treat esophageal strictures. Now there are various types of esophageal stents, and the advantages and disadvantages of each stent are also different. According to the stent Different materials can be divided into the following types: 1. Stainless steel metal stent; 2. Memory metal stent; 3. Polyester plastic stent; 4. Degradable stent; Stents and non-covered stents; according to wh...

AI Technical Summary

Problems solved by technology

[0007] Although the above-mentioned prior art respectively solves some technical problems in the manufacture and use of esophageal stents, it does not provide a degradable coated esophageal drug inner stent with anti-reflux, leakage sealing, and anti-displacement to meet the requirements of esophageal stents. Rupture and anastomotic leak sealing needs

In addition, during the esophageal stent implantation operation, there is also the problem of poor position of the stent after release, especially for degradable stents due to their relatively poor self-expandability, such problems are more likely to occur, how to fix or Tuning is also currently an unresolved issue

Especially for patients with benign esophageal rupture or anastomotic leakage after esophageal surgery, since most of them do not have symptoms of esophageal stenosis, the existing esophageal stents still have the problem of easy displacement when used clinically. Only by pasting on the esophageal mucosa can it play a therapeutic role, and the positioning and fixing of the esophageal stent is also an important technical problem that needs to be solved

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