The effect of stone size on comminution efficiency in shock wave lithotripsy

Published

Conference Paper

© 2017 Author(s). We have investigated the relationship between stone size and stone comminution (SC) in shock wave lithotripsy (SWL). Begostone phantoms of cylindrical shape in 4-, 7- and 10-mm size (W x H) groups were prepared with appropriately equal total mass (i.e., 1.5 g) in a tube holder and treated in an electromagnetic shock wave lithotripter field at various locations and doses. The results reveal a close correlation between SC and the average peak pressure, P+(avg), incident on the stone among differnet size groups. The P+(avg) threshold to initiate stone fragmentation and the slope of SC vs ln (P+(avg)) curve in water were found to increase with decreased stone size. In 1,3-butanediol where cavitation is suppressed, the P+(avg) threshold was found to be similar to the value in water yet the slope of the SC curve was significantly reduced at decreased stone size. Altogether, these results demonstrate a clear dependency of the P+(avg) threshold and rate of SC on stone size, as well as the importance of cavitation in producing efficiency stone comminution during SWL.

Full Text

Duke Authors

Cited Authors

  • Zhang, Y; Concha, D; Zhong, P

Published Date

  • March 17, 2017

Published In

Volume / Issue

  • 1821 /

Electronic International Standard Serial Number (EISSN)

  • 1551-7616

International Standard Serial Number (ISSN)

  • 0094-243X

International Standard Book Number 13 (ISBN-13)

  • 9780735414891

Digital Object Identifier (DOI)

  • 10.1063/1.4977669

Citation Source

  • Scopus