Influence of pulse repetition rate on cavitation at the surface of an object targeted by lithotripter shock waves

Yuri A. Pishchalnikov, Mark M. Kaehr, James A. McAteer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Stone breakage in shock wave lithotripsy is improved by slowing the rate of shock wave (SW) delivery. Previous studies have shown that increased cavitation at fast pulse repetition frequency (PRF) reduces the tensile phase of the SW, while the leading positive wave is virtually unaffected. Since the tensile component of the SW drives cavitation, and since cavitation at the stone contributes to breakage, it seems likely that increased cavitation along the path to the stone affects cavitation at the stone. Here we present preliminary data suggesting that PRF influences bubble dynamics at the stone. High-speed imaging showed that as PRF increased, bubble density of cavitation clouds increased, and the size of individual bubbles decreased. A new method to measure stresses generated by cavitation was used to show that locally induced stresses from bubble collapse can be greater than the incident SW, and were higher at 0.5Hz than at 2Hz PRF.

Original languageEnglish (US)
Title of host publicationBiomedical and Biotechnology Engineering
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages191-200
Number of pages10
ISBN (Electronic)0791842967
DOIs
StatePublished - Jan 1 2007
EventASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007 - Seattle, United States
Duration: Nov 11 2007Nov 15 2007

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume2

Conference

ConferenceASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007
CountryUnited States
CitySeattle
Period11/11/0711/15/07

ASJC Scopus subject areas

  • Mechanical Engineering
  • Engineering(all)

Fingerprint Dive into the research topics of 'Influence of pulse repetition rate on cavitation at the surface of an object targeted by lithotripter shock waves'. Together they form a unique fingerprint.

Cite this