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.

主权项

1. A transcatheter valve prosthesis comprising:
a tubular stent having a radially compressed configuration for delivery within a vasculature and an expanded configuration for deployment within a native heart valve, the tubular stent including a support frame of struts and openings defined between the struts; a prosthetic valve component disposed within and secured to the stent; and an anti-paravalvular leakage component coupled to and circumferentially surrounding an outer surface of the tubular stent, the anti-paravalvular leakage component including
a radially-compressible annular scaffold anda membrane of impermeable material extending over an outer surface of the annular scaffold,wherein the annular scaffold is a sinusoidal patterned ring of self-expanding material that defines a plurality of peaks, a plurality of valleys, and a plurality of segments with each segment of the plurality of segments being formed to extend between a respective peak and valley of the pluralities of peaks and valleys, the anti-paravalvular leakage component having an expanded configuration in which the segments of the annular scaffold bow and curve radially away from the outer surface of the tubular stent.