Bioprosthetic heart valve with elastic commissures

Details Bioprosthetic heart valve with elastic commissures Bioprosthetic heart valve with elastic commissures

1990-04-11

1991-08-06

Shay, Randy Citrin

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

Heart valve

Having rigid or semirigid pivoting occluder

623900, A61F 224

Patent

active

050374346

ABSTRACT:
A bioprosthetic heart valve comprising first and second mechanisms for supporting leaflets to provide multiple effective spring constants. An inner frame supporting commissures of the valve is elastic, permitting the commissures to bend in toward the center of the prosthetic heart valve at very low loads. A relatively rigid annular support ring supports the elastic frame and provides the second spring constant mechanism. An attachment system for sewing bioprosthetic leaflets to the frame and clamping the leaflets between the frame and the annular ring minimizes stress risers in the leaflets. The leaflets have an uncoupled mating edge where the leaflets meet in the center of the valve. The uncoupled portions of the leaflets permit the leaflets to roll by each other.

REFERENCES:
patent: 4084268 (1978-04-01), Ionescu et al.
patent: 4106129 (1978-08-01), Carpentier et al.
patent: 4192020 (1980-03-01), Davis et al.
patent: 4343048 (1982-08-01), Ross et al.
patent: 4778461 (1988-10-01), Pietsch et al.
patent: 4888010 (1989-12-01), Bokros

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