Puncture type drainage tube capable of recovering metallic biliary stent

Abstract

The invention discloses a puncture type drainage tube capable of recovering a metallic biliary stent and belongs to the technical field of medical instrument manufacturing. The puncture type drainagetube comprises the metallic stent, an outer sleeve, an inner sleeve and a puncture needle. The metallic stent is formed by weaving a nickel-titanium alloy wire, and a nickel-titanium alloy recovery wire is arranged at the tail of the metallic stent. The head of the outer sleeve is conical, the head and a body of the outer sleeve are soft plastic tubes, and the tail of the outer sleeve is a hard plastic tube. The inner sleeve is made of hard plastic, the head of the inner sleeve is rhombic, a recovery wire through hole is formed in the position, close to an extending portion, of a body of the inner sleeve, a metallic stent recovery wire enters a cavity of the inner sleeve through the through hole, and a thread is formed in the surface of the tail of the inner sleeve. The puncture needle isa metal needle, a plastic resistance block is arranged at the head end of the puncture needle, a cap-shaped connector is arranged at the tail end of the puncture needle, a thread is formed in the inner wall of the cap-shaped connector, and the cap-shaped connector can be screwed at the tail end of the inner sleeve. The puncture type drainage tube has the advantages that the puncture type drainagetube can directly puncture the bile duct to enter the expanded bile duct after being assembled; the inner sleeve is used as an outer drainage tube, after the fistula tract is formed, the metallic stent recovery wire is buried in the skin of a puncture point, and the puncture point is sutured; and the metallic stent can be recovered.

Description

technical field [0001] The invention belongs to the technical field of medical equipment manufacturing, and relates to a minimally invasive medical technology and surgical equipment, which are used for percutaneous transhepatic bile duct puncture to treat benign and malignant extrahepatic bile duct strictures, in particular to a minimally invasive surgical equipment capable of recovering the bile duct Piercing drain with metal stent. Background technique [0002] Extrahepatic bile duct stricture is a common clinical disease and frequently-occurring disease, including inflammatory bile duct stricture, traumatic bile duct stricture, bile duct anastomotic stricture after liver transplantation, malignant bile duct stricture, etc. Poor bile excretion can cause chills, high fever, jaundice, and epigastric pain. Persistent obstruction can cause cholestatic cirrhosis, liver failure, and even endanger the life of the patient. [0003] The treatment of extrahepatic biliary stenosis i...

AI Technical Summary

Problems solved by technology

Among the three drainage methods, the external biliary drainage tube can only relieve jaundice, but cannot relieve stenosis. The loss of a large amount of bile will lead to anorexia, water, acid-base and ion disturbance; biliary plastic placement is second, but the rate of re-stenosis after stent removal is higher. High; biliary metal stent implantation is to treat extrahepatic bile duct stenosis to obtain a larger expansion diameter. It is generally used for the treatment of malignant extrahepatic biliary stenosis, and is rarely used for the treatment of benign biliary stenosis because percutaneous transhepatic puncture is difficult. Easy to remove the inserted metal stent

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