Patent ID: 9011525
Filing Date: 2015-04-21
Classification: A61F

Abstract:
1. A heart valve prosthesis, comprising: a collapsible stent comprising a plurality of separate lengths of wire secured together with a plurality of sutures, each length of wire having a series of turns, wherein each length of wire is formed in the shape of a cylinder and axially overlaps with another length of wire of the plurality of lengths of wire such that a first length of the plurality of separate lengths of wire circumscribes a second length of the plurality of separate lengths of wire; and a one-piece multi-leaflet valve attached to the collapsible stent, the one-piece multi-leaflet valve comprising a cylinder of material secured to the collapsible stent at three points; wherein the stent is collapsible in a radial direction between a contracted state and an expanded state, the contracted state having a radial dimension smaller than a radial dimension of the expanded state, wherein the stent is spring biased toward the expanded state such that it occupies an active state when implanted into a heart, the active state having a radial dimension that is between the radial dimension of the contracted state and the radial dimension of the expanded state such that a radial load generated by the bias of the collapsible stent is sufficient to retain the heart valve prosthesis in the heart, wherein the series of turns in the plurality of separate lengths of wire define a plurality of alternating peaks, around which a cylindrical cuff of the one-piece multi-leaflet valve is wrapped, the cylindrical cuff for preventing regurgitation during use of the valve.