The usefulness of stone density and patient stoutness in predicting extracorporeal shock wave efficiency: Results in a North African ethnic group

Auteurs-es

  • Hamdoune Abdelaziz Urology Department. Universitary Military Hospital Med V. Hay Ryad. Rabat. Morocco
  • Yassine Elabiad
  • Ilyas Aderrouj
  • Abdellatif Janane
  • Mohamed Ghadouane
  • Ahmed Ameur
  • Mohamed Abbar

DOI :

https://doi.org/10.5489/cuaj.1849

Mots-clés :

stone density, ESWL, Hounsfield units, computed tomography

Résumé

Introduction: 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 < 0.001, student’s t-test). The mean SSD were 10.6 ± 2.0 and 11.2 ± 2.6 cm in ESWL successful and failure groups, respectively; this was not statistically significant.

Conclusions: This study shows that stone density can help to predict the outcome of ESWL. We propose that stone density <500 HU are highly likely to result in successful ESWL. Conversely, stone densities >800 HU are less likely to be successful.

Téléchargements

Les données relatives au téléchargement ne sont pas encore disponibles.

Biographie de l'auteur-e

Hamdoune Abdelaziz, Urology Department. Universitary Military Hospital Med V. Hay Ryad. Rabat. Morocco

department of urology

Téléchargements

Publié-e

2014-08-11

Comment citer

Abdelaziz, H., Elabiad, Y., Aderrouj, I., Janane, A., Ghadouane, M., Ameur, A., & Abbar, M. (2014). The usefulness of stone density and patient stoutness in predicting extracorporeal shock wave efficiency: Results in a North African ethnic group. Canadian Urological Association Journal, 8(7-8), e567–9. https://doi.org/10.5489/cuaj.1849

Numéro

Rubrique

Case Series