Saccule-type vena cava membrane puncturing dilator

Abstract

The invention discloses a vena cava membrane puncturing device used for endovascular therapy. In recent years, the method for interventional therapy of the membrane-type Budd-Chiari syndrome (BCS) utilizes a hollow membrane puncturing needle and adopts the principle that a membrane is punctured by the membrane puncturing needle, a guide wire penetrates through the membrane to guide a saccule to dilate so as to eliminate a stenotic segment, or the membrane is directly punctured by the guide wire. The technology has the key point that the needle head is aligned to the center of the membrane and proper force is required, while the defect lies in that if the direction of the needle head does not align to the center but deviate to the periphery and the force is overlarge, a blood vessel can be punctured, the membrane puncturing needle is mistakenly punctured into the pleura or the heart sac, causing unnecessary injury, and a saccule catheter is required to be changed for secondary membrane dilatation after the membrane puncturing. The invention provides a vena cava membrane puncturing dilator, which is characterized in that a dilatable saccule with fixing and orienting functions is added on the periphery of the tip of traditional membrane puncturing needle, and can overcome the defects of high difficulty of the membrane puncturing technology and high risk and achieve better effects of one-time membrane puncturing and membrane dilatation.

Description

technical field [0001] The present invention relates to a kind of medical device, more specifically, relates to a kind of blood vessel septum breaking dilator used in blood vessel lumen operation. Background technique [0002] Budd-Chiari syndrome refers to the stenosis or complete occlusion of the inferior vena cava or (and) hepatic vein in the posterior segment of the liver, resulting in obstruction of hepatic venous return, clinically manifested as hepatomegaly, progressive liver function damage, and massive ascites. Severe cases may have upper gastrointestinal bleeding, hematemesis and melena, and advanced patients are all complicated with liver cirrhosis, which seriously threatens human life. The incidence rate of primary disease in our country is higher. The most common type is limited stenosis or obstruction of the inferior vena cava, which is divided into simple inferior vena cava septum type, limited stenosis of inferior vena cava and limited obstruction of inferio...

AI Technical Summary

Problems solved by technology

Regardless of using a guide wire or a rupture needle, due to the long distance from the puncture point to the septum, the supporting force is insufficient, the strength is difficult to grasp, and the direction is difficult to control, resulting in difficult membrane rupture, long time, low success rate, and high accidental injury rate

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