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 Citations (Scopus)

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
Title of host publicationASME International Mechanical Engineering Congress and Exposition, Proceedings
Pages191-200
Number of pages10
Volume2
DOIs
StatePublished - 2008
EventASME International Mechanical Engineering Congress and Exposition, IMECE 2007 - Seattle, WA, United States
Duration: Nov 11 2007Nov 15 2007

Other

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

Fingerprint

Pulse repetition rate
Cavitation
Shock waves
Bubbles (in fluids)
Imaging techniques

ASJC Scopus subject areas

  • Engineering(all)
  • Mechanical Engineering

Cite this

Pishchalnikov, Y. A., Kaehr, M. M., & McAteer, J. A. (2008). Influence of pulse repetition rate on cavitation at the surface of an object targeted by lithotripter shock waves. In ASME International Mechanical Engineering Congress and Exposition, Proceedings (Vol. 2, pp. 191-200) https://doi.org/10.1115/IMECE2007-41387

Influence of pulse repetition rate on cavitation at the surface of an object targeted by lithotripter shock waves. / Pishchalnikov, Yuri A.; Kaehr, Mark M.; McAteer, James A.

ASME International Mechanical Engineering Congress and Exposition, Proceedings. Vol. 2 2008. p. 191-200.

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

Pishchalnikov, YA, Kaehr, MM & McAteer, JA 2008, Influence of pulse repetition rate on cavitation at the surface of an object targeted by lithotripter shock waves. in ASME International Mechanical Engineering Congress and Exposition, Proceedings. vol. 2, pp. 191-200, ASME International Mechanical Engineering Congress and Exposition, IMECE 2007, Seattle, WA, United States, 11/11/07. https://doi.org/10.1115/IMECE2007-41387
Pishchalnikov YA, Kaehr MM, McAteer JA. Influence of pulse repetition rate on cavitation at the surface of an object targeted by lithotripter shock waves. In ASME International Mechanical Engineering Congress and Exposition, Proceedings. Vol. 2. 2008. p. 191-200 https://doi.org/10.1115/IMECE2007-41387
Pishchalnikov, Yuri A. ; Kaehr, Mark M. ; McAteer, James A. / Influence of pulse repetition rate on cavitation at the surface of an object targeted by lithotripter shock waves. ASME International Mechanical Engineering Congress and Exposition, Proceedings. Vol. 2 2008. pp. 191-200
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