Open AccessThe usefulness of stone density and patient stoutness in predicting extracorporeal shock wave efficiency: Results in a North African ethnic group
Author(s) -
Hamdoune Abdelaziz,
Y.A. Elabiad,
Ilyas Aderrouj,
A. Janane,
M. Ghadouane,
A. Ameur,
M. Abbar
Publication year - 2014
Publication title -
canadian urological association journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 38
eISSN - 1920-1214
pISSN - 1911-6470
DOI - 10.5489/cuaj.1849
Subject(s) - hounsfield scale , extracorporeal shock wave lithotripsy , medicine , extracorporeal , lithotripsy , computed tomography , urology , nuclear medicine , surgery
We determine the role of stone density and skin-to-stone distance (SSD) by non-contrast computed tomography of the kidneys, ureters and bladder (CT-KUB) in predicting the success of extracorporeal shock wave lithotripsy (ESWL).Methods: We evaluated 89 patients who received ESWL for renal and upper ureteric calculi measuring 5 to 20 mm, over a 12-month period. The mean stone density in Hounsfield units (HU) and mean SSD in mm was determined on pre-treatment CT-KUB at the CT workstation. ESWL was successful if post-treatment residual stone fragments were ≤3 mm.Results: ESWL success was observed in 68.5% of patients. Mean stone densities were 505 ± 153 and 803 ± 93 HU in the ESWL successful and failure groups, respectively (p 800 HU are less likely to be successful.