[Renal functional reserve in children with a history of hemolytic uremic syndrome through technetium-99m diethylene-triamine-penta-acetic acid clearance].

Protein loads in normal subjects increase glomerular filtration rate (GFR), which implies a renal functional reserve (RFR). Patients who have suffered a loss in the number of nephrons may show normal values of GFR due to hyperfiltration of remnant nephrons, with subsequent loss of RFR. This could be an early sign of renal damage, and probably a contributory factor to renal damage progress.