Suspension-type regurgitation-resistant biliary stent

Abstract

The invention provides a suspension-type regurgitation-resistant biliary stent. The stent comprises a biliary duct part for being arranged in the common bile duct and an intestinal part for being arranged in the duodenum, the total length of the biliary stent is smaller than or equal to 25 cm, the length of the biliary duct part is larger than or equal to 10 cm, and the length of the intestinal part is larger than or equal to 13 cm. The biliary stent is placed in the human body and more easily accepted by a patient, complications such as perforation are not easily caused, and when the intestinal part is placed in the duodenum and can reach the horizontal part in the duodenum, the countercurrent condition of content in the duodenum is effectively reduced; in addition, a bending part is located between a first connection segment and a second connection segment, so that a preset angle is formed between the first connection segment and the second connection segment, in this way, the intestinal part can better adapt to deformation of the enteric cavity, the biliary stent is conveniently placed and prevented from being in contact with the intestinal mucosa, and the discomfort of the human body after the stent is placed in the human body is relieved.

Description

technical field

[0001] The invention relates to the technical field of medical devices, in particular to a hanging anti-reflux biliary stent. Background technique

[0002] The biliary system has the functions of secreting, storing, concentrating and transporting bile, and plays an important role in regulating the discharge of bile into the duodenum. Malignant biliary obstruction caused by malignant tumors such as cholangiocarcinoma, liver cancer, pancreatic cancer, and metastatic cancer has a high incidence and is often discovered at an advanced stage. Liver transplantation has become the most effective way to treat end-stage liver disease, but the incidence of postoperative biliary complications is still high, according to statistics, 10% to 30%, which is one of the important factors affecting the long-term survival of patients after surgery. Implanting biliary stents into stenotic or obstructed parts is currently a better way to treat biliary obstruction. Especially in co...

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