Intrahepatic bile duct coated stent and use method thereof

Abstract

The invention relates to an intrahepatic bile duct coated stent and a use method thereof. The stent comprises a coated stent body; a local area of the side wall of the coated stent body is provided with a non-coated area which contains liquid substances, wherein the liquid substances can penetrate through and flow into an opening of the end portion of the coated stent body. The use method of the intrahepatic bile duct coated stent comprises the following steps that a, the coated stent body 11 sleeves a stent conveying device; b, the stent is implanted; c, the coated stent body 11 is released;d, the coated stent body 11 is drawn out by drawing a traction rope 14, and then the operation of breaking stone and removing the stone is conducted immediately. The stent has the advantages of beingsimple in structure, convenient to operate and the like.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an intrahepatic bile duct covered stent and its application method. Background technique [0002] Intrahepatic bile duct stones are often combined with hepatic bile duct stenosis. The principle of treatment for primary hepatic bile duct stenosis combined with stones is to remove the lesion, remove the stones, relieve the obstruction, and unobstructed drainage. However, due to the existence of bile duct stricture, the treatment has brought great difficulties, and the treatment effect has not been satisfactory, which has also become an important reason for stone recurrence and reoperation. Hepatobiliary stricture is still the main problem in biliary surgery. The hepatic bile ducts are often combined with extrahepatic and extrahepatic bile duct stones, resulting in bile duct obstruction; inducing local infection and aggravating bile duct strictures, making it difficult to expel the s...

AI Technical Summary

Problems solved by technology

Hepatolithiasis combined with intrahepatic infection is mostly complicated, difficult to deal with, and poor prognosis

4. Minimally invasive liver-protecting stone extraction. On the basis of ERCP endoscopy, the duodenal papilla balloon is used to dilate the outlet of the bile duct, and the ERCP fiber endoscope is sent into the common bile duct, through the common bile duct to the intrahepatic bile duct, and through the intrahepatic The bile duct balloon dilates the intrahepatic bile duct, expands the inner diameter of the intrahepatic bile duct, and unblocks the stone removal channel. At that time, there were some problems with the above method. It is easy to be dilated by a balloon, and once the intrahepatic bile duct is dilated, the following situations may occur. If it is a scar stenosis, due to the rapid expansion of the balloon, bleeding or perforation of the intrahepatic bile duct may occur On the other hand, because the periphery of the intrahepatic bile duct is surrounded by the liver, the balloon itself needs to overcome the pressure of the liver to dilate the intrahepatic bile duct, and the expansion effect is uncertain. After balloon deflation, the intrahepatic bile ducts return to their original diameter in a short time due to the pressure of the liver

Images