PERCUTANEOUS HEART VALVE

摘要

A percutaneous heart valve for deployment within a body cavity is described. The percutaneous heart valve includes an expandable frame having a plurality of cells adapted for allowing the frame to expand and collapse. A one-way valve is positioned within the expandable frame. The frame includes a proximal anchoring portion and a distal anchoring portion. The distal anchoring portion includes a plurality of distal anchors, each distal anchor having at least a portion positioned radially outwardly from the frame and extending in a direction that is substantially parallel with a longitudinal axis. The distal anchors preferably bend radially outwardly before bending to extend toward the proximal anchoring portion. Radial expansion of the frame causes the proximal and distal anchoring portions to move closer together for capturing body tissue therebetween, thereby anchoring the percutaneous heart valve to the body tissue.

主权项

1. A percutaneous heart valve configured to be deployed within a body cavity having an opening surrounded by surrounding body tissue, the percutaneous heart valve comprising:
an expandable frame comprising a proximal end and a distal end and a longitudinal axis extending therethrough, the expandable frame comprising a plurality of cells configured to permit the frame to radially expand and collapse for deployment within the opening of the body cavity; a valve seated inside the expandable frame; a proximal anchoring portion, wherein when the frame is in an expanded configuration, the proximal anchoring portion extends at least partially distally; and a distal anchoring portion comprising a plurality of distal anchors, wherein when the frame is in an expanded configuration:
at least a portion of each distal anchor extends proximally to a proximalmost portion of the distal anchor positioned radially outward from the frame, the proximalmost portions extending in a direction that is more parallel with the longitudinal axis than with a transverse axis perpendicular to the longitudinal axis;at least one of the distal anchors bends radially outwardly along a first portion before bending to extend toward the proximal anchoring portion along a second portion; andthe proximalmost portions of the distal anchors are spaced apart by less than two cell lengths from a distalmost portion of the proximal anchoring portion; and wherein the frame is configured such that radial expansion of the frame within the opening causes the proximal anchoring portion and the distal anchors to draw closer with the surrounding body tissue positioned between the proximal anchoring portion and the distal anchors.