Several types of mechanical cardiac prostheses have been constructed with Delrin occluders, a material that is subject to osmotic swelling. The leaflets are designed to expand to specific tolerances when immersed in blood. The synthetic blood analogs commonly used in vitro contain hydrophilic compounds that can alter the osmotic expansion of the Delrin occluders. A static leak test chamber was employed to illustrate the effects of various test fluids on the sustained regurgitation phase of Delrin valves. [S0148-0731(00)02104-X]
The Osmotic Swelling Characteristics of Cardiac Valve Prostheses
Contributed by the Bioengineering Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the Bioengineering Division July 21, 1999; manuscript received January 11, 2000. Associate Technical Editors: S. E. Rittgers.
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Bachmann , C., Wilson , M., Kini , V., Deutsch and , S., Fontaine , A. A., and Tarbell, J. M. (January 11, 2000). "The Osmotic Swelling Characteristics of Cardiac Valve Prostheses ." ASME. J Biomech Eng. August 2000; 122(4): 453–454. https://doi.org/10.1115/1.1286565
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