Patent ID: 9393133
Filing Date: 2016-07-19
CPC Classification: A61F,A61M

Claim Text:
1. An abdominal cavity-vein shunt stent for transporting ascites accumulated in an abdominal cavity of a patient to a vascular system, including: a cylindrically-extending stent body having one end which is adapted to be disposed in an intrahepatic vein and the other end which is adapted to be disposed in the abdominal cavity by piercing a liver parenchyma; a one-way valve disposed on an inner circumference of the stent body and configured to have flow in a single direction based on a differential pressure so as to be opened to drain the ascites into the intrahepatic vein when a differential pressure obtained by subtracting a pressure of the intrahepatic vein from a pressure in the abdominal cavity is not lower than a predetermined value, and so as to be closed when the differential pressure is lower than the predetermined value, the stent-body covering an entire length of the one-way valve; and a cover member disposed in a portion of the stent body which is adapted to pass through the liver parenchyma from the intrahepatic vein to the abdominal cavity so that the liver parenchyma is prevented from entering the stent body, wherein the one-way valve is integrally formed with the cover member at a side thereof which is adapted to be disposed in the intrahepatic vein, and the one-way valve and the cover member are disposed on the inner circumference of the stent body, wherein the cover member is not disposed in a portion of the stent body on an outer circumference of the one-way valve, wherein the portion of the stent body in which the cover member is not disposed is mesh-shaped, and is opened when the one-way valve is closed, wherein an outer diameter of the one-way valve is separated from an inner diameter of the stent body when the one-way valve is in a closed state, wherein the outer diameter of the one-way valve is closer to the inner diameter of the stent body when the one-way valve is in an opened state, wherein an entirety of the stent body has a constant diameter, and wherein an entrance preventing member of mesh adapted to prevent organs in the abdominal cavity from entering the stent body is provided over an opening of the other end of the stent body which is adapted to be disposed in the abdominal cavity.