TIPS covered stent capable of automatically adjusting blood flow pressure

Abstract

The invention relates to the field of medical instruments, and in particular relates to a transjugular vein intrahepatic portal vein puncture stent (TIPS stent) capable of automatically adjusting blood flow pressure. The stent is composed of a bare stent and a stent inner diameter adjusting structure, and two ends of the stent inner diameter adjusting structure are respectively provided with a development structure. The stent inner diameter adjusting structure can automatically adjust the inner diameter of the product according to the portal vein blood flow pressure. When the portal vein pressure rises, the stent inner diameter is increased, the blood flow in the stent is increased, and tissue bleeding of a patient caused by excessive rising of the portal vein pressure can be prevented; and when the portal vein pressure reduces, the inner diameter of the stent is reduced, the blood flow in the stent is reduced, and the occurrence rate of hepatic encephalopathy after a TIPS operation can be prevented. The product is simple and reliable in structure, the inner diameter change of the stent inner diameter adjusting structure is in smooth transition, and the occurrence rate of thrombusformed in the stent is reduced.

Description

technical field [0001] The patent of the present invention relates to a medical device, specifically a transjugular intrahepatic portal vein puncture stent (TIPS stent) that can automatically adjust blood flow. Background technique [0002] Hepatic cirrhosis and portal hypertension (PHT) refer to a group of clinical syndromes in which portal vein pressure (>15 mmHg) is increased due to various reasons such as viral hepatitis or Budd-Chiari syndrome, and blood flow in the portal vein system is obstructed, leading to the formation of collateral circulation. syndrome. Cirrhotic portal hypertension can lead to esophageal-gastric vein rupture and bleeding, refractory ascites, hepatic encephalopathy, hepatorenal syndrome and other complications. At present, in the clinical treatment of patients with portal hypertension and gastric fundus bleeding caused by portal hypertension, intrahepatic puncture through the jugular vein is often used to implant a covered stent between the p...

AI Technical Summary

Problems solved by technology

However, the stents of the above two patents only reduce the problem of bile leakage and the "capping" of the stent port, and thrombosis and excessive intimal hyperplasia are still easy to form inside the stent

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