Self-stretching intra-esophageal stent capable of carrying local chemotherapy drugs

Abstract

The invention relates to a self-stretching intra-esophageal stent capable of carrying local chemotherapy drugs. The self-stretching intra-esophageal stent capable of carrying the local chemotherapy drugs comprises a top ring, actuating plates, a frame body and a film sleeve sleeved outside the frame body, wherein slim drug carrying tubes are evenly distributed on the outer wall of the film sleeve, the chemotherapy drugs are contained in the slim drug carrying tubes, the top ring is arranged at one end of the frame body, the actuating plates are arranged on the top ring through lantern rings in a penetrating mode, the frame body is composed of stretchable units, each stretchable unit is composed of two clamping arms and a plurality of pairs of clamping rings, the two clamping arms of each stretchable unit are hinged together, and the lower ends of the actuating plates are placed on the clamping rings of the stretchable unit at the uppermost end. The self-stretching intra-esophageal stent capable of carrying the local chemotherapy drugs is capable of expanding a narrow section of the esophagus effectively in a feeding process, being closed in a non-feeding state, preventing backflow of stomach content effectively, and reducing foreign body sensation of a patient in the non-feeding state remarkably. Meanwhile, the chemotherapy drugs are carried by the intra-esophageal stent, local chemotherapy is achieved while the esophagus is expanded, and a better drug delivery route is provided for tumor chemotherapy.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a self-stretching esophageal stent capable of carrying local chemotherapy drugs. 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 cance...

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.

Although the placement of the existing esophageal stent can quickly relieve the patient's difficulty in swallowing and eating, after the existing stent is placed, the stent always tightly supports the esophagus no matter when eating or not, and the patient's foreign body sensation is obvious. Gastric reflux is a major disadvantage, which obviously limits the clinical application of esophageal stents, making it difficult for most patients with esophageal cancer to receive stents.

Images