Stent distracting vena cava membrane breaker

Abstract

The invention discloses a stent distracting vena cava membrane breaker applied to endovascular therapy. In an interventional therapy membrane Budd-Chiari syndrome method used in recent years, a hollow puncture needle is used, and the principle is: breaking a membrane with the puncture needle, making a guide wire pass through the membrane, and guiding a saccule to expand for eliminating a narrow section, or directly breaking the membrane with the guide wire. The key point of the technology is that: a needle head is aligned with the center of the membrane with appropriate force. The defect is that: if the needle head is not aligned with the center but is deviated towards the periphery, and excessive force is applied, blood vessels are broken, and hydropneumothorax or cardiac tamponade which endangers the life of a patient is caused by wrong insertion of the needle head into a pleura or a pericardium. The invention provides a stent which can contract and expand is arranged on the head part of a puncture needle sheath catheter on the basis of the conventional puncture needle, and stronger support force and more accurate directional property are provided for a membrane breaking needle under the coaction of the unfolded stent and a blood vessel cavity. By adopting the stent distracting vena cava membrane breaker, the defects of the prior art can be overcome, and a good membrane breaking effect is achieved.

Description

technical field [0001] The present invention relates to a kind of medical device, more specifically, relates to a kind of blood vessel septum destroyer 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 intrinsic disease is higher in our country. 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 inferior ven...

AI Technical Summary

Problems solved by technology

Regardless of using a guide wire or a puncture 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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