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Cavitation in medicine

Brennen, Christopher Earls (2015) Cavitation in medicine. Interface Focus, 5 (5). Art. No. 20150022. ISSN 2042-8898. PMCID PMC4549847. doi:10.1098/rsfs.2015.0022.

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We generally think of bubbles as benign and harmless and yet they can manifest the most remarkable range of physical effects. Some of those effects are the stuff of our everyday experience as in the tinkling of a brook or the sounds of breaking waves at the beach. But even these mundane effects are examples of the ability of bubbles to gather, focus and radiate energy (acoustic energy in the above examples). In other contexts that focusing of energy can lead to serious technological problems as when cavitation bubbles eat great holes through ships' propeller blades or cause a threat to the integrity of the spillways at the Hoover Dam. In liquid-propelled rocket engines, bubbles pose a danger to the stability of the propulsion system, and in artificial heart valves they can cause serious damage to the red blood cells. In perhaps the most extraordinary example of energy focusing, collapsing cavitation bubbles can emit not only sound, but also light with black body radiation temperatures equal to that of the sun (Brennen 1995 Cavitation and bubble dynamics). But, harnessed carefully, this almost unique ability to focus energy can also be put to remarkably constructive use. Cavitation bubbles are now used in a remarkable range of surgical and medical procedures, for example to emulsify tissue (most commonly in cataract surgery or in lithotripsy procedures for the reduction of kidney and gall stones) or to manipulate the DNA in individual cells. By creating cavitation bubbles non-invasively thereby depositing and focusing energy non-intrusively, one can generate minute incisions or target cancer cells. This paper will begin by briefly reviewing the history of cavitation phenomena and will end with a vision of the new horizons for the amazing cavitation bubble.

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Additional Information:© 2015 The Author(s) Published by the Royal Society. Published 21 August 2015. Competing interests. I declare I have no competing interests. Funding. I received no funding for this study. Acknowledgements. Many individuals provided me with valuable assistance in the preparation of this review, including Tim Colonius, Allan Acosta, Yoichiro Matsumoto, Aziz Anis, Michel Tanguay, Brant Maines, Morteza Gharib, Larry Crum, Tim Baldwin and Eric Johnsen.
Subject Keywords:cavitation, liposomes, ultrasound
Issue or Number:5
PubMed Central ID:PMC4549847
Record Number:CaltechAUTHORS:20151013-103610353
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Official Citation:Brennen CE. 2015 Cavitation in medicine. Interface Focus 5: 20150022.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61033
Deposited By: Tony Diaz
Deposited On:14 Oct 2015 14:55
Last Modified:19 May 2022 18:16

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