Comparative study of dynamic renal scintigraphy
and conventional ultrasonography for the diagnosis
of hydronephrosis as a complication of urolitithiasis
V. Hadzhiyska, T. Petrov, I. Kostadinova, R. Krusteva, V. Marianovski
Hydronephrosis is the most common complication of the nephrolithiasis which often leads to irreversible and long lasting consequences for the kidney involved. The aim of the study is to compare the results from the Ultrasonography (US) and the Dynamic renal scintigraphy (DRS) in the diagnosis of hydronehrosis as a complication of nephro- and urolithiasis. Forty-six patients (21 male, 26 female), aged between 13 and 85 years, with mainly unilateral proved or suspected hydronephrosis are studied. All of them have history for nephroor urolithiasis. A DRS with 99mTc-DTPA is done by using 255 MBq dose and 25 min. protocol. Diuretic test is performed in 24 (52 %) of the patients. The results from the US and the DRS are compared for all patients. The results from the comparative study show that the DRS confi rm and precise the diagnosis from the US in 72% of the cases, while in the rest of them the findings from the DRS differs from the US-diagnosis. In 32 % of the cases where diuretic test was performed an obstructive hydronephrosis is found. The comparative investigation provides evidence that the DRS corrects and precise the diagnosis of hydronephrosis, determined by US in signifi cant percentage of the cases, provides additional information by using functional parameters and should be used as a basic diagnostic method for the last therapeutic decision.
|Key words: DYNAMIC RENAL SCINTIGRAPHY. ULTRASOUND.