Title :
Real-time in vitro observation of cavitation on prosthetic heart valves
Author :
Zapanta, Conrad M. ; Liszka, Edward G., Jr. ; Stinebring, David R. ; Deutsch, Steven ; Geselowitz, David B. ; Tarbell, John M.
Author_Institution :
Pennsylvania State Univ., University Park, PA, USA
Abstract :
A method for real-time in vitro observation of cavitation on a prosthetic heart valve has been developed. Cavitation of four blood analog fluids (distilled water, aqueous glycerin, aqueous polyacrylamide, and aqueous xanthan gum) has been documented for a Medtronic/Hall prosthetic heart valve operating in a Penn State Electric Assist Device at physiologic conditions. For each fluid, cavity growth and collapse occurred in less than one millisecond. The cavity duration time was found to decrease with increasing atrial pressure at constant aortic pressure and beat rate. From this study, it was concluded that cavitation may also occur in blood
Keywords :
artificial organs; bubbles; cavitation; flow control; flow visualisation; haemodynamics; valves; aqueous glycerin; aqueous polyacrylamide; aqueous xanthan gum; atrial pressure; blood analog fluids; bubbles; cavitation; cavity collapse; cavity duration time; cavity growth; distilled water; electric assist device; mock circulatory loop; prosthetic heart valves; real-time in vitro observation; Arteries; Artificial biological organs; Bars; Biomechanics; Blood; Delay effects; Heart valves; In vitro; Mercury (metals); Prosthetics;
Conference_Titel :
Bioengineering Conference, 1993., Proceedings of the 1993 IEEE Nineteenth Annual Northeast
Conference_Location :
Newark, NJ
Print_ISBN :
0-7803-0925-1
DOI :
10.1109/NEBC.1993.404378
