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  • Title: The effect of radiopharmaceutical choice on the assessment of the relative renal function in upper urinary tract obstruction.
    Author: Sedlak-Vadoc V, Basić M, Kaludjerski S, Marusić G, Negrojević M, Borota R.
    Journal: Eur J Nucl Med; 1988; 14(1):32-6. PubMed ID: 2838283.
    Abstract:
    The relative function of the obstructed kidney (RFOK) was assessed in 43 adult patients with upper urinary tract obstruction (UUTO) using 99mTc-DTPA and 131I-ortho-iodohippurate (OIH) dynamic studies and 99mTc-DMSA dynamic and static studies. The patients were divided into five groups according to the duration and degree of obstruction. Findings were as follows: a) in patients with the first occurrence of acute severe obstruction (group 1), the relative glomerular filtration rate (GFR) was significantly less than the relative effective renal plasma flow (ERPF); b) in patients with chronic severe obstruction and long term uroinfection, the relative ERPF decreased significantly compared with the relative GFR; c) the RFOK calculated from the DMSA dynamic study was the same as both the relative GFR or ERPF in any group; d) the RFOK calculated from the DMSA static study seemed to parallel the relative ERPF more closely than the relative GFR, but in group one it was significantly higher than any of three other estimates. It is concluded that 99mTc-DTPA is the radiopharmaceutical of choice in obstructive uronephropathy, but when interpreting the RFOK, the time course and severity of obstruction, the presence or absence of uroinfection should also be considered.
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