The success of extracorporeal shock-wave lithotripsy based on the stone-attenuation value from non-contrast computed tomography
| Autor: | Ahmed S. Zayed, Ahmad A Al-Dessoukey, Amr M. Massoud, Ahmed Abdelbary, Ayman S. Moussa, Osama Mahmmoud |
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| Rok vydání: | 2014 |
| Předmět: |
Pathology
medicine.medical_specialty ROC receiver operating characteristic (curve) Urology medicine.medical_treatment NCCT non-contrast computed tomography BMI body mass index Computed tomography Lithotripsy Extracorporeal Urinary calculi BMI Hounsfield scale Lower calyceal stone medicine Stones / Endourology Original article medicine.diagnostic_test business.industry US ultrasonography Attenuation Stone attenuation value Extracorporeal shock wave lithotripsy HU Hounsfield unit Nuclear medicine business SAV stone-attenuation value BMI - Body mass index ESWL |
| Zdroj: | Arab Journal of Urology |
| ISSN: | 2090-598X |
| DOI: | 10.1016/j.aju.2014.01.002 |
| Popis: | Objective To determine the utility of the urinary stone-attenuation value (SAV, in Hounsfield units, HU) from non-contrast computed tomography (NCCT) for predicting the success of extracorporeal shock-wave lithotripsy (ESWL). Patients and methods The study included 305 patients with renal calculi of ⩽30 mm and upper ureteric calculi of ⩽20 mm. The SAV was measured using NCCT. Numerical variables were compared using a one-way analysis of variance with posthoc multiple two-group comparisons. Univariate and multivariate regression analysis models were used to test the preferential effect of the independent variable(s) on the success of ESWL. Results Patients were grouped according to the SAV as group 1 (⩽500 HU, 81 patients), group 2 (501–1000 HU, 141 patients) and group 3 (>1000 HU, 83 patients). ESWL was successful in 253 patients (83%). The rate of stone clearance was 100% in group 1, 95.7% (135/141) in group 2 and 44.6% (37/83) in group 3 (P = 0.001). Conclusions The SAV value is an independent predictor of the success of ESWL and a useful tool for planning stone treatment. Patients with a SAV ⩾956 HU are not ideal candidates for ESWL. The inclusion criteria for ESWL of stones with a SAV 30 kg/m2 and a lower calyceal location make them less ideal for ESWL. |
| Databáze: | OpenAIRE |
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