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[Classification of kidney grafts by renographic parameters].

The aim of this work was to analyze the use of some renographic parameters derived from the 99mTc-MAG3 renogram to classify post-transplantion studies in two groups: Normal functioning grafts (NFG) and delayed grafts function (DGF) which included Acute Tubular Necrosis (ATN) and Acute Rejection (AR). The analysis included data from 38 NFG, 33 ATN and 23 AR. The parameters calculated were: mean transit time (MTT), the Initial Uptake (IU) and the maximum activity (MA) of the renogram. The results obtained from this analysis show that ln(IU) is the best parameter to classify individuals in either group and that the use of MA or the MTT does not improve the results. Using a cutoff point of ln(IU) = 0.28 and a prevalence of 25% for DGF, the estimated predictive values were 92% for DGF and 99% for NFG.