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Acoustic and mechanical properties of renal calculi: implications in shock wave lithotripsy.

Publication ,  Journal Article
Chuong, CJ; Zhong, P; Preminger, GM
Published in: J Endourol
December 1993

The acoustic and mechanical properties of renal calculi dictate how a stone interacts with the mechanical forces produced by shock wave lithotripsy; thus, these properties are directly related to the success of the treatment. Using an ultrasound pulse transmission technique, we measured both longitudinal and transverse (or shear) wave propagation speeds in nine groups of renal calculi with different chemical compositions. We also measured stone density using a pycnometer based on Archimedes' principle. From these measurements, we calculated wave impedance and dynamic mechanical properties of the renal stones. Calcium oxalate monohydrate and cystine stones had higher longitudinal and transverse wave speeds, wave impedances, and dynamic moduli (bulk modulus, Young's modulus, and shear modulus), suggesting that these stones are more difficult to fragment. Phosphate stones (carbonate apatite and magnesium ammonium phosphate hydrogen) were found to have lower values of these properties, suggesting they are more amenable to shock wave fragmentation. These data provide a physical explanation for the significant differences in stone fragility observed clinically.

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Published In

J Endourol

DOI

ISSN

0892-7790

Publication Date

December 1993

Volume

7

Issue

6

Start / End Page

437 / 444

Location

United States

Related Subject Headings

  • Urology & Nephrology
  • Ultrasonics
  • Stress, Mechanical
  • Lithotripsy
  • Kidney Calculi
  • Humans
  • 3202 Clinical sciences
  • 1103 Clinical Sciences
 

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Chuong, C. J., Zhong, P., & Preminger, G. M. (1993). Acoustic and mechanical properties of renal calculi: implications in shock wave lithotripsy. J Endourol, 7(6), 437–444. https://doi.org/10.1089/end.1993.7.437
Chuong, C. J., P. Zhong, and G. M. Preminger. “Acoustic and mechanical properties of renal calculi: implications in shock wave lithotripsy.J Endourol 7, no. 6 (December 1993): 437–44. https://doi.org/10.1089/end.1993.7.437.
Chuong CJ, Zhong P, Preminger GM. Acoustic and mechanical properties of renal calculi: implications in shock wave lithotripsy. J Endourol. 1993 Dec;7(6):437–44.
Chuong, C. J., et al. “Acoustic and mechanical properties of renal calculi: implications in shock wave lithotripsy.J Endourol, vol. 7, no. 6, Dec. 1993, pp. 437–44. Pubmed, doi:10.1089/end.1993.7.437.
Chuong CJ, Zhong P, Preminger GM. Acoustic and mechanical properties of renal calculi: implications in shock wave lithotripsy. J Endourol. 1993 Dec;7(6):437–444.
Journal cover image

Published In

J Endourol

DOI

ISSN

0892-7790

Publication Date

December 1993

Volume

7

Issue

6

Start / End Page

437 / 444

Location

United States

Related Subject Headings

  • Urology & Nephrology
  • Ultrasonics
  • Stress, Mechanical
  • Lithotripsy
  • Kidney Calculi
  • Humans
  • 3202 Clinical sciences
  • 1103 Clinical Sciences