Variable columnar bladder digestive tract expanding support

Abstract

The invention relates to a variable columnar bladder digestive tract expanding support. The variable columnar bladder digestive tract expanding support comprises an air / liquid injection tube and a variable columnar bladder; one end of the air / liquid injection tube is provided with an openable air / liquid injection nozzle, and the variable columnar bladder is connected with the other end of the air / liquid injection tube; the air / liquid injection nozzle can inject air / liquid into the variable columnar bladder or draws air / liquid out of the variable columnar bladder, the variable column bladder is expanded to a hollow annular cylindrical supporting body after air / liquid is injected to the variable columnar bladder, a supporting body utilizes internal expansion pressure to be supported at a narrow digestive tract of a patient, and a hollow part of the supporting body forms a food flow channel. The volume of the injected air / water can be decided according to the narrowness of the digestive tract of the patient and the like, the size of the supporting body can also be constantly changed according to the change of a narrow section so that the supporting body can be firmly supported on the narrow digestive tract of the patient all the time and prevented from moving and slipping; meanwhile, by adjusting the size of the diameter and the expansion pressure, gradual expansion is achieved, so that the patient is adapted to expansion, and the probability that the patient bleeds and is perforated can be lowered.

Description

technical field [0001] The invention relates to a medical device, in particular to a variable column capsule alimentary canal expansion stent capable of real-time adjustment of the insertion site, the diameter of the stent, and the lateral expansion pressure. Background technique [0002] Gastrointestinal strictures are common in benign and malignant tumors of the digestive tract, anastomotic strictures after gastrointestinal surgery, scar contractures after esophageal burns, achalasia, and incomplete pyloric obstruction. Stenosis of the upper gastrointestinal tract can cause difficulty in eating or even obstruction of the gastrointestinal tract, while stenosis of the lower gastrointestinal tract can cause difficulty in defecation or even obstruction of the patient. The implantation of endoscopic self-expanding metal stents has gradually become the main treatment method for the treatment of upper gastrointestinal stenosis, but the metal stents cannot adjust the insertion sit...

AI Technical Summary

Problems solved by technology

The implantation of endoscopic self-expanding metal stents has gradually become the main treatment method for the treatment of upper gastrointestinal stenosis, but the metal stents cannot adjust the insertion site, stent diameter and lateral expansion pressure in real time, and bleeding, perforation, pain and stent failure may occur after insertion. Complications such as detachment; and, because tumor or granulation tissue may grow into the stent through the stent mesh, tumor tissue or granulation tissue hyperplasia at both ends of the stent, so patients with stenosis are prone to re-stenosis

At the same time, the displacement rate after stent implantation is high, and long-term existence can easily cause inflammatory hyperplasia, restenosis or even occlusion in the stent, leading to complications such as gastrointestinal perforation and bleeding, which seriously affect the survival time and quality of life of patients and increase the economic burden.

The stent falls off and shifts or the size of the stent is not suitable after the stent is placed, which will increase the pain and cost of the patient's reoperation.

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