Is stone radiodensity a useful parameter for predicting outcome of extracorporeal shockwave lithotripsy for stones < 2 cm?



Título del documento: Is stone radiodensity a useful parameter for predicting outcome of extracorporeal shockwave lithotripsy for stones < 2 cm?
Revista: International braz j urol
Base de datos: PERIÓDICA
Número de sistema: 000296771
ISSN: 1677-5538
Autores: 1


Instituciones: 1University of Colorado, Health Sciences Center, Denver, Colorado. Estados Unidos de América
Año:
Periodo: Ene-Feb
Volumen: 31
Número: 1
Paginación: 3-9
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Caso clínico, analítico
Resumen en inglés PURPOSE: Several factors determine the success of extracorporeal shockwave lithotripsy (SWL) for kidney stones: stone size, stone location within the collecting system, stone type, and the SWL machine used. It has been suggested that stone radiodensity, as determined either by plain radiography or computed tomography attenuation values, may be an independent predictor of SWL success. We examined the outcome of SWL for solitary stones less than or equal to 2 cm located within the renal pelvis, based on their radiodensity. MATERIALS AND METHODS: 211 patients with solitary renal pelvic stones measuring less than or equal to 2 cm were treated on a Dornier Doli 50 lithotriptor under general anesthesia. The radiodensity of the stone was determined to be either less than, equal to, or greater than the radiodensity of the ipsilateral 12th rib. Stone-free rates (SFR) were determined at 3 months by kidney, ureters and bladder (KUB) plain X-rays. Patients requiring re-treatment or auxiliary procedures were considered failures of SWL. RESULTS: Follow-up SFR information was available in all 211 patients. Stone composition was available in 158 (75%) treated patients, but no correlation was found between stone radiodensity and stone composition. For stones < 10 mm within the renal pelvis, the SFRs were similar (71 to 74% regardless of stone radiodensity). For stones between 11 and 20 mm, the SFR was 60% if the stone had a radiodensity > 12th rib compared to a SFR of 71% if the stone radiodensity was < 12th rib
Disciplinas: Medicina
Palabras clave: Cirugía,
Diagnóstico,
Litiasis renal,
Calcio,
Densitometría,
Ondas de choque,
Litotripsia
Keyword: Medicine,
Diagnosis,
Surgery,
Renal lithiasis,
Calcium,
Densitometry,
Shock waves,
Lithotripsy
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