Title :
Focused beam convection system
Author :
Ristic, Cedomila ; Edwards, David A. ; Shung, K. Kirk ; Duda, J. Larry
Author_Institution :
Dept. of Chem. Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
It was demonstrated that focusing of a high frequency ultrasound beam near a microporous membrane immersed in a colloid suspension can produce rapid fluid convection through the membrane toward the focal region. The experimental results indicate that the driving force for this mechanism is a “dynamic osmotic” pressure on the membrane caused by high agitation of colloidal particles near the ultrasound focal region. This ultrasound induced convection may be utilized in noninvasive diagnostic methods where metabolite extraction across biological membranes is needed
Keywords :
biomedical equipment; biomedical ultrasonics; biomembrane transport; colloids; convection; osmosis; suspensions; ultrasonic effects; ultrasonic equipment; colloid suspension; dynamic osmotic pressure; focused beam convection system; high frequency ultrasound beam; metabolite extraction across biological membranes; microporous membrane; noninvasive diagnostic methods; rapid fluid convection; ultrasound focal region; Biomedical engineering; Biomembranes; Chemical engineering; Design for experiments; Frequency; Kirk field collapse effect; Monitoring; Polymers; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
Bioengineering Conference, 1998. Proceedings of the IEEE 24th Annual Northeast
Conference_Location :
Hershey, PA
Print_ISBN :
0-7803-4544-4
DOI :
10.1109/NEBC.1998.664887
