A biliary calculus occluder placed through choledochoscope

Abstract

The invention provides a stone stopper arranged in a gall duct through a choledochoscope. The stone stopper is a hollow body shaped like a polygonal cone, a pull ring is arranged at the top of the stone stopper, a biofilm is arranged on a side surface of the stone stopper, and an opening is formed in the bottom of the stone stopper; a plurality of elastic metal wires form edges of the polygonal cone, and a bottom end of each elastic metal wire is positioned on a bottom surface of the cone and can be folded to the bottom center of the cone under the action of external force. The stone stopper as a gallstone stopper solves a problem of stone dispersion often occurring in a conventional process of extracting and breaking stones by the choledochoscope, shortens the stone extraction time and reduces stone reoccurrence probability. The stone stopper is simple in structure and convenient in material utilization, has certain flexibility, elasticity and biocompatibility, does not cause a remarkable wound to a patient during operation, and is convenient and reliable to operate, and low in price.

Description

technical field [0001] The invention relates to a medical instrument, in particular to an occluder for stones in the bile duct placed through a choledochoscope. The occluder is put into the bile duct during operation and removed from the body after operation. Background technique [0002] Extrahepatic and extrahepatic bile duct stones are frequently-occurring and common diseases in my country. Intrahepatic bile duct stones refer to stones in the bile ducts above the confluence of the left and right hepatic ducts. They can exist alone or coexist with extrahepatic bile duct stones. At present, the main treatment methods are still surgical removal of stones or partial resection of liver lobes, etc., but for patients with multiple intrahepatic and extrahepatic bile duct stones combined with bile duct deformation, collapse, and stenosis, it is more necessary to rely on choledochoscope lithotripsy to remove the stones to the greatest extent. Net residual stones. [0003] In the p...

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Problems solved by technology

[0003] In the process of lithotripsy by choledochoscopy, the most common and troublesome thing for the operator is that after the lithotripsy, a large number of stones of different sizes spread to the bile branch with no stones in the original with the flow of flushing fluid or bile. Spreading to the biliary branches above grade 2-3 will bring great trouble to stone extraction and will increase the time for stone extraction, residual stones and the probability of recurrence. Currently, there is no clinical method or device that can effectively prevent this situation occur

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