Novel ascites hepatic-vein bypass anti-thrombus stent device with controllable one-way valve

Abstract

The invention discloses an ascites hepatic-vein bypass anti-thrombus stent device with a controllable one-way valve. The device includes a puncture retracting outfit for creating a bypass channel, a main channel stent and a retractable anti-backflow one-way valve stent. According to the device, a hepatic vein is punctured from a jugular vein to an abdominal cavity through the puncture outfit to create the bypass channel, the main channel stent is placed in the bypass channel, the smoothness of the channel is maintained, and the retractable anti-backflow one-way valve stent is placed into the main channel stent to create an anti-flowback one-way channel to facilitate bypass of liquid in the abdominal cavity into the hepatic vein, and meanwhile blood in the hepatic vein does not flow back into the abdominal cavity. Once thrombus is formed in the main channel stent, the anti-backflow one-way valve stent can be taken out again for replacement. The surfaces and inner surfaces of the main channel stent and retractable anti-backflow one-way valve stent are all coated with anti-congealing, antibacterial and hydrophilic membrane coatings to prevent formation of thrombus. Meanwhile, a retractable ring is arranged on the valve stent, once thrombus is formed, the retractable ring can be taken out of the human body for replacement, and the sectional main channel stent can adapt to a crookedbypass channel.

Description

technical field [0001] The invention relates to the field of medical stents and devices, in particular to a novel ascites hepatic venous bypass controllable one-way valve antithrombotic stent device. Background technique [0002] my country is a highly endemic area of ​​hepatitis B. According to the 2002 national hepatitis B serum epidemiological survey, the prevalence rate of HbsAg in the general population in my country is 9.09%. It is estimated that about 110 million people are chronically infected with HBV, accounting for 1 / 2 of the chronic HBV infected people in the world. 3. Among them, chronic hepatitis B is about 20 to 30 million cases. About 300,000 cases of liver disease related to hepatitis B die every year in the whole country. Liver cirrhosis is formed in the late stage of hepatitis, resulting in ascites caused by portal hypertension, and the patient has severe abdominal distension symptoms, resulting in anorexia and dyspnea. The commonly used methods are diur...

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Problems solved by technology

However, this method generally requires extracorporeal ultrafiltration, concentration, and subcutaneous tube placement, and the fistula is prone to bacterial contamination; the tube has a long stroke, is easy to block, and is difficult to handle; due to gravity and the patient's position, the reinfusion effect is not good Hemodialysis and ascites reinfusion are performed separately, which is time-consuming; and too much concentrated ascites infusion can lead to acute pulmonary edema and esophageal vein rupture and bleeding, and complications such as disseminated intravascular coagulation often endanger the lives of patients

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