Endovascular stent special for TIPS operations

Abstract

The invention relates to an endovascular stent special for TIPS operations. The endovascular stent aims at solving the problem that blood flow of portal veins and hepatic veins is seriously influencedwhen a straight cylindrical covered stent is applied to the TIPS operations, and simultaneously solving the problem that traditional bare stents are likely to cause stent occlusion resulted from tissue proliferation into stent lumens. The endovascular stent comprises a straight cylindrical framework and a tubular covering film. The tubular covering film is fixedly arranged in the middle of the straight cylindrical framework to enable the two ends of the straight cylindrical framework to form exposed anchoring parts. Both ends of the endovascular stent can form anchoring parts with through holes, the positioning effect is excellent, blood flow can pass through the through holes, and the influence on the blood flow in blood vessels at the anchoring parts can be reduced when the endovascularstent is applied.

Description

technical field [0001] The invention relates to the technical field of medical stents, in particular to a special intravascular stent for TIPS (transjugular intrahepatic portosystemic shunt) surgery. Background technique [0002] Globally, liver cirrhosis is the fourth leading cause of death (non-communicable diseases) after tumors, cardiovascular diseases, and chronic lung diseases. In the past 20 years, the mortality rate caused by liver cirrhosis and liver cancer has increased by about 50000000. The reason is that liver disease has a strong compensatory function, and the onset of liver disease is hidden and asymptomatic. Patients with liver cirrhosis will show various decompensation symptoms only after they have developed to the decompensation stage. In decompensated cirrhosis, patients will develop esophageal and gastric varices. Once the varicose esophageal and gastric fundus veins rupture and bleed, severe gastrointestinal bleeding will occur. Gastrointestinal blee...

AI Technical Summary

Problems solved by technology

[0005] The inventors of the present application found that: 1. When a bare stent is used to establish an intrahepatic portosystemic shunt channel, body tissues can proliferate into the lumen of the stent through the mesh of the stent, and the incidence of postoperative restenosis is high; 2. The bare stent cannot seal If the breach at the portal vein puncture point is blocked, the risk of bleeding at the portal vein puncture point during the operation is high; 3. The combined application of covered stent and bare stent can combine the advantages of the two stents, but the cost of using two stents is higher. The surgical operation process is too complicated; 4. Viatorr covered stent can simplify some surgical operations, but the proximal end of the stent is covered stent, which affects the blood flow of the main hepatic vein and inferior vena cava

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