A retractable internal stent for esophagus

Abstract

The invention relates to a telescopic stent for an esophagus. 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 supporting rod, limiting rods and a clamping rod. The supporting 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 supporting 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 the 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 support for esophagus. 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 the difficulty i...

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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. 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. Take esophageal cancer as an example. Esophageal cancer is one of the common malignant tumors of the digestive tract in my country, ranking sixth among malignant tumors in the world. Once discovered, it is mostly in the middle and late stage The most common problems in patients with middle and advanced esophageal cancer are difficulty in swallowing and eating caused by esophageal stenosis and obstruction in different degrees, which obviously affects the quality of life of patients

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