Balloon catheter for transjugular intrahepatic portosystemic shunt

Abstract

The invention relates to a balloon catheter for transjugular intrahepatic portosystemic shunt, and belongs to the technical field of a medical apparatus. The balloon catheter comprises a catheter anda distensible balloon, wherein the catheter penetrates through the balloon, and is fixedly connected with the balloon; the balloon catheter also comprises radiopaque markers, wherein the radiopaque markers are distributed in an equal spacing manner on the catheter in the axial direction of the catheter, and lengths of the radiopaque markers are consistent; and the radiopaque markers are located inthe balloon and close to the balloon. Trough balloon distension and portography, relative positions among inferior vena cava, hepatic veins and portal veins can be shown, and through counting of thenumber of the radiopaque markers among the inferior vena cava, the hepatic veins and the portal veins, the distances among the inferior vena cava, the hepatic veins and the portal veins can be obtained; and further, operation doctors are helped to reasonably select the length of a special stand for TIPS and determine the position of the special stand for TIPS.

Description

technical field [0001] The invention relates to a balloon catheter for transjugular intrahepatic portosystemic shunt, belonging to the technical field of medical devices. Background technique [0002] Transjugular intrahepatic portosystemic shunt (TIPS) is a minimally invasive interventional technique that can reduce portal vein pressure. During the operation of TIPS, the reasonable selection of the length of the TIPS-specific stent and the accurate placement of the position of the TIPS-specific stent are the keys to ensure the patency of the shunt after TIPS. At present, the operating physician selects the length of the TIPS-specific stent and judges the placement position of the TIPS-specific stent based on the notch displayed during balloon dilation of the puncture tract and the relative positions of the portal vein, hepatic vein, and inferior vena cava displayed by portal venography. [0003] Such as figure 1 As shown, when the balloon expands the intrahepatic puncture...

AI Technical Summary

Problems solved by technology

However, angiography shows a planar image of multiple structures overlapping together, which leads to the fact that the blood vessel displayed on the image may be an image of multiple blood vessels or multiple parts of a blood vessel overlapping together, so according to the scale mark on the catheter The measured distance between blood vessels is not equal to the actual distance, and there is a certain error

[0005] Therefore, the distance and relative position between the inferior vena cava, hepatic vein and portal vein cannot be judged at the same time based on the notch displayed by balloon dilation or the scale marks in the angiographic image. The determination of the placement position of the stent still depends on the experience and judgment of the operating physician

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