New polyurethane prostheses for substitution of cardiac valve disease and remodeling of the right ventricle in congenital heart malformations
نویسنده
چکیده
Methods Based on a computed tomography angiography of the aorta, we made a delrin ring, keeping the anatomical characteristics of the aortic annulus. A matrix one following we made from stainless steel with the shape of the three cusp aortic valve, followed by preparation of the injection of liquid polyurethane segmented (SPU), using a esterolitografia technique. In vitro tests: The materials used in the manufacture of prostheses were approved in biocompatibility testing according to ISO 10993 Biological evaluation of medical devices. The dentures will undergo physical tests, hydrodynamic and durability according to ISO 5840 Cardiovascular Implants Prosthetic heart valves.
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