Unilateral-wing bile-duct inner stent with stent-withdrawing line

Abstract

The invention relates to the technical field of medical equipment, in particular to a unilateral-wing bile-duct inner stent with a stent-withdrawing line. The unilateral-wing bile-duct comprises a tubular stent (1), a lateral wing (2) and the withdrawing line. The lateral-wing (2) is located at a near end of the stent (1). The withdrawing line is composed of a line (3) and a withdrawing rod (4), one end of the line (3) is tied to the middle of the withdrawing rod (4), while the other end of the same is fixed onto a far end of the stent (1). The unilateral-wing bile-duct stent is simple in structure and convenient to use, so that withdrawing or replacing the stent is facilitated. The line of the drawing line is thin, so that a barrier function of the duodenal papilla cannot be affected, intestinal bacteria can be prevented from retrograding to enter the bile duct to cause cholangitis, the intestinal bacterial can also be prevented from attaching to an inner wall of the stent or blocking the stent due to food reflux, and bleeding, perforating and retrograde bile-duct infection and the like caused by the fact that the duodenal papilla is needed to be cut open since the stent fails to be withdrawn are avoided.

Description

technical field [0001] The invention relates to the technical field of medical devices, and relates to a unilateral bile duct intraductal stent with a stent recovery line. Background technique [0002] Clinically, for patients with malignant stenosis of the bile duct caused by cholangiocarcinoma or benign stenosis of the bile duct caused by surgery, trauma, liver transplantation, etc., it is usually necessary to insert a biliary stent to dilate the stenotic segment of the bile duct. The existing biliary stent is a bilateral bile duct stent, which is composed of a stent and a lateral stent, the stent is tubular, and the two wings are respectively located at two ends of the stent. When in use, the bile duct stent is pushed to the bile duct where the blockage is located, such as intrahepatic bile duct, left and right hepatic duct, common hepatic duct or common bile duct, through the stent pusher. One end (proximal end) of the bile duct stent is placed in the bile duct, and the ...

AI Technical Summary

Problems solved by technology

Although this kind of bilateral bile duct stent is convenient to take out or replace because one end stays in the duodenum, it often causes intestinal bacteria to adhere to the inner wall of the stent or cause food reaction. The flow causes the stent to block, and because it crosses the duodenal papilla and destroys the barrier function of the duodenal papilla, it may allow intestinal bacteria to retrograde into the bile duct and cause cholangitis. Moreover, in case the distal end of the stent slips into the bile duct, The duodenal papilla can only be taken out by incision, which will not only destroy the normal structure of the duodenal papilla, lose its barrier function and cause intestinal bacteria to enter the bile duct retrogradely and cause cholangitis, but also may lead to bleeding and perforation occurrence of complications

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