Anti-Paravalvular Leakage Component for a Transcatheter Valve Prosthesis

摘要

A transcatheter valve prosthesis includes an expandable tubular stent, a prosthetic valve within the stent, and an anti-paravalvular leakage component coupled to and encircling the tubular stent. The anti-paravalvular leakage component includes a radially-compressible annular scaffold, which is a sinusoidal patterned ring of self-expanding material, and an impermeable membrane extending over the annular scaffold. The anti-paravalvular leakage component has an expanded configuration in which at least segments of the annular scaffold curve radially away from the tubular stent. Alternatively, the anti-paravalvular leakage component includes a plurality of self-expanding segments and an annular sealing element coupled to inner surfaces of the segments. The anti-paravalvular leakage component has an expanded configuration in which the segments curve radially away from the tubular stent and the annular sealing element is positioned between an outer surface of the tubular stent and inner surfaces of the segments. The segments may be orthogonal or oblique to the outer surface of the tubular stent.

主权项

1. A transcatheter valve prosthesis comprising:
a stent having a compressed configuration for delivery within a vasculature and an expanded configuration for deployment within a native heart valve; a prosthetic valve component disposed within and secured to the stent; and an anti-paravalvular leakage component coupled to and encircling an outer surface of the tubular stent, the anti-paravalvular leakage component including a plurality of self-expanding segments and an annular sealing element attached to the segments, a first end and a second end of each segment being attached to the outer surface of the tubular stent at first and second attachment points, respectively, wherein the anti-paravalvular leakage component has an expanded configuration in which the segments curve radially away from the outer surface of the tubular stent and are oblique to the outer surface of the tubular stent such that a plane defined by each segment is non-perpendicular with respect to a tangential plane of the tubular stent taken through the first and second attachments points.