Estimation of glomerular filtration rate in children using 99m-technetium DTPA. A comparison with 51-chromium EDTA clearance.
The usefulness of radionuclide imaging studies with 99m-technetium diethylenetriaminepentaacetic acid (Tc-DTPA) for quantitating the glomerular filtration rate (GFR) in children was studied. This was compared to the conventional methods for measuring GFR using 51-chromium-EDTA clearance (Cr-EDTA), creatinine clearance and a height/plasma creatinine formula. In the 22 children studied, the correlation coefficient between renal uptake of DTPA and Cr-EDTA was 0.90 (p less than 0.001). In contrast, there was a poorer correlation between Cr-EDTA and creatinine clearance (r = 0.69) or the derived GFR using height/creatinine formula (r = 0.83). The regression line between Tc-DTPA uptake and Cr-EDTA clearance was used to derive a formula for calculating the predicted GFR. This was tested in 10 additional children, and the correlation between the predicted GFR and measured GFR (using Cr-EDTA clearance studies) was 0.92 (p less than 0.001). Quantitative estimation of the GFR during renal imaging studies is a feasible and convenient method of assessing renal function.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002860:Chromium Radioisotopes; D004492:Edetic Acid; D005919:Glomerular Filtration Rate; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging; D007668:Kidney / Q000002:abnormalities / Q000000981:diagnostic imaging; D007674:Kidney Diseases / Q000000981:diagnostic imaging*; D009393:Nephritis / Q000000981:diagnostic imaging; D004369:Pentetic Acid; D011877:Radionuclide Imaging; D013667:Technetium; D016284:Technetium Tc 99m Pentetate / Q000031:analogs & derivatives*; D014718:Vesico-Ureteral Reflux / Q000000981:diagnostic imaging
D002860:Chromium Radioisotopes; C034230:technetium Tc 99m-Sn-DTPA; D013667:Technetium; D004369:Pentetic Acid; D004492:Edetic Acid; D016284:Technetium Tc 99m Pentetate