Four-leaflet stented mitral heart valve

Details Four-leaflet stented mitral heart valve Four-leaflet stented mitral heart valve

2005-08-25

2008-11-25

Sweet, Thomas J (Department: 3774)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Heart valve

Flexible leaflet

C623S002140

Reexamination Certificate

active

07455689

ABSTRACT:
A prosthetic mitral heart valve having four separate flexible leaflets. The heart valve includes a support frame that may be non-circular, for example elliptical or “D-shaped”. The support frame may have an undulating outflow edge defined by four inflow cusps and four outflow commissures to which each of the flexible leaflets attaches. The support frame may comprise an undulating wireform and a surrounding stent defining a structure having four cantilevered posts projecting in the outflow direction to support the four leaflets. The heart valve is designed to be secured in the annulus and function as a standalone unit without papillary muscle connections to the leaflets. The four leaflets may be arranged in two opposed pairs, one pair being smaller than the other pair. The larger pair of leaflets may be identical, or differently sized. Existing sizes of heart valve leaflets may be utilized with the smaller leaflets being at least two leaflet sizes smaller than the larger leaflets in odd millimeter increments.

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Hofmann, et al., Early eperience with a quadrileaflet stentless mitral valve, 71 (5 Supp) pp. 323-326 Annals of Thoracic Surgery, 2001.

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