Patent ID: 8460323
Filing Date: 2013-06-11
Classification: A61B,A61F,A61M

Abstract:
1. A percutaneous method for creating a venous valve from autologous tissue, the method comprising the steps of: advancing a catheter having a radially-expandable component and a retractable dissecting system slidingly received within the catheter to a target location, wherein the catheter includes at least one delivery shaft defining a delivery lumen and having a port that is positioned on one side of the radially-expandable component and the dissecting system includes at least one expandable dissecting component that is constrained in a delivery configuration within the delivery lumen; expanding the radially-expandable component of the catheter to bias the port against a wall of the vein; proximally retracting the retractable dissecting system such that the at least one dissecting component exits the port formed within the delivery shaft and penetrates into the vein wall and forms a subintimal longitudinal dissection of at least intimal tissue of the vein wall that is separated from remaining tissue of the vein wall, wherein the dissecting component assumes an expanded configuration when it exits the port; collapsing the radially-expandable component of the catheter such that the at least one dissecting component separates the subintimal longitudinal dissection of tissue from the remaining tissue of the vein wall and pulls the subintimal longitudinal dissection of tissue into a lumen of the vein and thereby simultaneously forms a flap of tissue and a sinus between the flap and the remaining tissue of the vein wall, wherein the flap and the sinus constitute at least a portion of the venous valve.