Guide wire passing bile duct and pancreatic duct stent extractor with barbs

Abstract

The bile duct and pancreatic duct stent extractor comprises a core rod and is characterized in that a limiting rod and a sliding block hand ring are arranged on the outer wall of the core rod, and the limiting rod is located at the upper end of the sliding block hand ring. The bile duct and pancreatic duct stent extractor capable of allowing the guide wire to pass through and provided with the barbs can enter a stent cavity, the barbs are opened to drag out the stent, then the stent is taken out of the forceps channel, a thick stent can still pass through the forceps channel, and when a snare and foreign matter forceps which are commonly used clinically at present are used for taking the thick stent, the stent is bent, and the stent cannot be damaged. When passing through the forceps channel, the pressure is too large, so that the bracket is broken and even the endoscope forceps channel is damaged; at present, no stent extractor with a guide wire exists clinically, after the stent extractor is used for extracting the stent, the guide wire is still kept in the bile duct and the pancreatic duct, the failure rate of intubation again is reduced, serious complications such as perforation, bleeding, infection and postoperative pancreatitis caused by repeated intubation are reduced, and better use prospects are brought.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a barbed bile duct and pancreatic duct stent extractor capable of passing through a guide wire. Background technique [0002] ERCP is currently an important surgical method for the treatment of biliary and pancreatic system diseases because of its minimal invasiveness, relative safety and effectiveness, and the placement of bile duct and pancreatic duct stents is widely used. Recurrent cholangitis, post-liver transplantation, benign biliary stricture caused by benign biliary space-occupying, or malignant biliary obstruction caused by cholangiocarcinoma, pancreatic cancer, liver cancer compression or metastasis all require placement of bile duct stents, and most patients need repeated stent replacement for further improvement. Improve biliary obstruction and stenosis. [0003] Chronic pancreatitis, pancreas divisum, pancreatic duct stenosis, pancreatic pseudocyst, etc. require ERCP...

AI Technical Summary

Problems solved by technology

Due to the long-term placement of stents in some patients, edema around the nipple may cause difficulty in intubation of the bile duct and pancreatic duct after the stent is pulled out, especially the infiltration and metastasis of malignant tumors, resulting in the inability of the guide wire to enter the biliary tract and pancreatic duct, resulting in surgery. failure, for this reason, we propose a barbed bile duct and pancreatic duct stent extractor that can pass through the guide wire

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