Patent ID: 8287481
Filing Date: 2012-10-16
Classification: A61B,A61F,A61M

Abstract:
1. A device used for establishing a transjugular intrahepatic portosystemic shunt quickly by locating a portal vein in a liver for receiving the shunt comprising: an elongated, semi-rigid first sheath having a proximal end and a distal end, where said first sheath is sized to fit inside a human jugular vein; an elongated, semi-rigid second sheath having a proximal end and a distal end, where said second sheath is sized to slidably fit inside said first sheath; wherein the length of said second sheath is at least equal to the length of said first sheath; an elongated, semi-rigid, and hollow primary needle with a proximal end and a distal end, where said needle is sized to slidably fit inside said second sheath; wherein the length of said primary needle is greater than the length of said second sheath; a plurality of elongated, semi-rigid, and hollow secondary needles for locating a liver portal vein, each needle with a proximal end and a distal end, wherein the length of each secondary needle is equal to every other secondary needle and said secondary needles are greater in length than said primary needle; where said plurality of secondary needles are sized to slidably fit together inside said primary needle; each of said secondary needles having a preformed curved tip at its distal end and an aperture in its body at the tip; said primary needle having a plurality of holes near the distal end of the primary needle sized to fit said secondary needles, where the number of holes is at least equal to the number of secondary needles; said second sheath being located inside said first sheath, said primary needle being located inside said second sheath, and said plurality of secondary needles being located inside said primary needle; a multi-chambered plunging device capable of creating an aspirating force having a proximal end and a distal end, where the number of chambers in the plunging device is greater than or equal the number of secondary needles; and where said distal end of said plunging device engages the proximal end of said primary needle and when said plunging device is actuated, an actuating force from the aperture at the tip of each secondary needle through the inside of said secondary needles is generated.