Adjustable bent sheath tube and transjugular intrahepatic puncture system

Abstract

The invention discloses an adjustable bent sheath tube. The adjustable bent sheath tube comprises a connected tube body and a connector, wherein the tube body sequentially comprises an inner tube, a steel tube and an outer tube from inside to outside in the radial direction, the steel tube is provided with a plurality of cutting gaps at intervals in the axial direction, the inner tube is providedwith a pull wire cavity and a conveying cavity, a pull wire is arranged in the pull wire cavity, and the head end of the pull wire is fixedly connected with the head end of the steel tube; and when tensioned, the pull wire drives the steel tube to bend. The invention also discloses a transjugular intrahepatic puncture system. The adjustable bent sheath tube can change the bending shape of the steel tube by tensioning or loosening the pull wire, the bent sheath tube is matched with the actual distribution condition of blood vessels of a patient, a purpose of accurately puncturing and conveyinginstruments is achieved, and the safety and effectiveness of the operation are improved.

Description

technical field [0001] The invention relates to the technical field of interventional therapy, in particular to an adjustable curved sheath tube. It also relates to a transjugular intrahepatic puncture system. Background technique [0002] Transjugular intrahepatic portosystemic shunt (TIPS) is a new technique of interventional therapy for the treatment of portal hypertension, that is, the jugular vein is punctured from the inferior vena cava to the hepatic vein, and the liver parenchyma is punctured from the hepatic vein to the intrahepatic portal vein. After dilating the puncture tract, a metal stent is placed to establish an effective portosystemic shunt to reduce the portal vein pressure. At the same time, gastric coronary vein sclerosing embolization can also be performed. [0003] When puncturing the hepatic vein, it is often necessary to perform hepatic venography to determine the puncture position and direction, and to further determine the sagittal angle of the pun...

AI Technical Summary

Problems solved by technology

[0003] When puncturing the hepatic vein, it is often necessary to perform hepatic venography to determine the puncture position and direction, and to further determine the sagittal angle of the puncture needle track in combination with portal venography if necessary. However, the sheaths of the existing puncture systems are all fixed and curved The sheath tube cannot change its curved shape according to the actual situation, and cannot adapt to the differences in the distribution of blood vessels in different patients, which increases the difficulty of the operation and adds additional medical damage

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