PROSTHETIC HEART VALVE BURIED SEWING RING
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Abstract
A SEWING RING OF LIMP KNIT SYNTHETIC PLASTIC MATERIAL IS RECEIVED IN THE EXTERNAL ANTICLASTIC GROOVE OF A RIGID PROSTHETIC HEART VALVE VENTURI RING SO THAT VERY LITTLE IF ANY OF THE SEWING RING PROTRUDES OUT OF THE GROOVE. SUCH SEWING RING INCLUDES A CENTRAL BAND PORTION AND OPPOSITE AXIAL FREE EDGE PORTIONS CURLED TO FORM LOOSE ROLLS HAVING A CREVICE BETWEEN THEM. THE CENTRAL BAND OF THE SEWING RING IS ANCHORED IN THE BOTTOM OF THE GROOVE BY SEVERAL WRAPS OF LIGATURE INSERTED THROUGH THE CREVICE AND BINDING THE BAND OF THE SEWING RING TO TE GROOVE BOTTOM. THE EDGE ROLLS OF THE SEWING RING ARE CONNECTED ONLY BY THE BAND CENTRAL PORTION AND ARE NOT SEWED TOGETHER PRIOR TO IMPLANTATION BUT BOTH OF SUCH EDGE ROLLS ARE SECURED IN A HEART BLOOD PASSAGE BY SUTURES SPACED CIRCUMFERENTIALLY ABOUT THE SEWING RING DURING IMPLANTATION.
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