A - Human Necessities – 61 – L
Patent
A - Human Necessities
61
L
3/118
A61L 27/36 (2006.01) A61F 2/24 (2006.01)
Patent
CA 1220001
Abstract of the Disclosure A unitary tissue element is mounted on a pre- ferred stent and suture ring assembly, the stent compred of a circular mounting frame with a series of circumferen- tially spaced commissure posts, separated by scalloped por- tions above a common annular base. A suture ring disposed in outer concentric relation to the stent base is secured thereon by a unitary tubular cloth covering stitched to enclose both stent and suture ring. The pericardium is formed from a rectangular section of uniform thickness cut from a bovine pericardial sac, cleaned in saline solution, then partially fixed in a glutaraldehyde solution. A con- ventional leaflet-forming tool is inserted through the stent annulus and the tissue is positioned in solution on the stent/ring assembly. Using small vertical stitches, the tissue is stitched continuously along its exterior lower edge to the cloth covering so as to join the base of the stent and the inner circumferential edge of the suture ring. The tissue is secured to the cloth covering of the commissure posts by a vertical pattern of continuous cross stitches. The valve is then dipped in saline to set the tissue in the desired leaflet configuration, then immersed in the fixative alternated with withdrawal and resting periods.
457329
Mitral Medical International Inc.
Smart & Biggar
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