Computed tomographic evaluation of gallstone calcification for biliary lithotripsy.

P. L. Caslowitz, E. K. Fishman, D. R. Kafonek, K. D. Lillemoe, S. Mitchell, D. M. Widlus, G. P. Saba

Research output: Contribution to journalArticlepeer-review


As the Food and Drug Administration trials for biliary lithotripsy in the United States near completion, future criteria for patient eligibility remain to be defined. Gallstone calcification greater than 3-mm partial rim on plain film (KUB) or oral cholecystogram (OCG) has excluded patients thus far, since early results of gallstone clearance (lithotripsy plus chemodissolution) were suboptimal with calcified stones. To evaluate the usefulness of these criteria for gallstone fragmentation, computed tomographic (CT) scans were performed on 20 patients immediately prior to lithotripsy to evaluate gallstone density and 24 hours after lithotripsy to observe the CT appearance of fragmentation. The adequacy of fragmentation was determined by pre- and post-lithotripsy sonography. This report constitutes the results of these investigations.

Original languageEnglish (US)
Pages (from-to)171-175
Number of pages5
JournalThe Journal of lithotripsy & stone disease
Issue number2
StatePublished - Apr 1991


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