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

fYear

1993

fDate

18-19 Mar 1993

Firstpage

152

Lastpage

153

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioengineering Conference, 1993., Proceedings of the 1993 IEEE Nineteenth Annual Northeast

Conference_Location

Newark, NJ

Print_ISBN

0-7803-0925-1

Type

conf

DOI

10.1109/NEBC.1993.404378

Filename

404378