Telescopic stent for treatment of esophageal stricture

Abstract

The invention relates to a telescopic stent for treatment of esophageal stricture. The telescopic stent comprises a stent body, an elastic film sleeve and a limit mechanism, wherein the stent body is sleeved with the elastic film sleeve. The stent body is composed of two stent units. Each stent unit comprises two clamping arms and two semicircular clamping rings. The two stent units are hinged together through the clamping arms, and openings of the two semicircular clamping rings located at the same end are opposite to each other. The limit mechanism comprises a strutting rod, a supporting rod, limiting rods and a clamping rod. The strutting rod is arranged on the clamping arms of one stent unit through a torsional spring. The multiple limiting rods are evenly arranged on the supporting rod in the length direction of the supporting rod. The included angle between each limiting rod and the supporting rod is smaller than 60 degrees. The clamping rod is arranged on the clamping arms opposite to the clamping arms where the strutting rod is located. The clamping rod is perpendicular to the plane where the corresponding clamping arms are located. The telescopic stent can be quickly placed at a narrow position of an esophagus; the stent can be placed easily and quickly in the whole process and can be taken out conveniently, so that the success rate of an operation is high.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a retractable internal stent for treating esophageal stenosis. Background technique [0002] At present, cancer is one of the three major killers of human diseases, and the mortality rate of patients is relatively high. However, after decades of careful research by people in the medical and health circles, therapeutic drugs continue to appear, and medical methods are also continuously improved, such as the treatment of cancer caused by malignant tumors. For esophageal stenosis, clinicians put in stents to achieve the purpose of expanding the pipeline. Taking esophageal cancer as an example, esophageal cancer is one of the common malignant tumors of the digestive tract in China, ranking sixth among malignant tumors in the world. Once discovered, it is mostly in the middle and late stage , The most common problem in patients with middle and advanced esophageal cancer is...

AI Technical Summary

Problems solved by technology

[0002] At present, cancer is one of the three major killers of human diseases, and the mortality rate of patients is relatively high. With the emergence of esophageal cancer, medical methods are also continuously improved. For example, in the treatment of esophageal stenosis caused by malignant tumors, clinicians put in stents to achieve the purpose of expanding the pipeline. Taking esophageal cancer as an example, esophageal cancer is one of the common malignant tumors of the digestive tract in China. It ranks 6th among malignant tumors in the world. Once discovered, most of them are in the middle and late stages. The most common problems in the middle and late stages of esophageal cancer patients are the difficulty in swallowing and eating caused by esophageal stenosis and obstruction in different degrees, which obviously affects the quality of life of patients.

Images