Validation of a simple isotopic technique for the measurement of global and separated renal function.
Schlegel and Gates described an isotopic method for the measurement of global and separated glomerular filtration rate (GFR) and effective renal plasma flow (ERPF) based on the determination by scintillation camera of the fraction of the injected dose (99mTc-DTPA-[131I]hippuran) present in the kidneys 1-3 min after its administration. This method requires counting of the injected dose and attenuation correction, but no blood or urine sampling. We validated this technique by the simultaneous infusion of inulin and polycyclic aromatic hydrocarbon (PAH) in patients with various levels of renal function (anuric to normal). To better define individual renal function we studied 9 kidneys in patients either nephrectomized or with a nephrostomy enabling separated function measurement. A good correlation between inulin, PAH clearance, and isotopic GFR-ERPF measurement for both global and separate renal function was observed.
D005919:Glomerular Filtration Rate; D006801:Humans; D007444:Inulin; D007457:Iodine Radioisotopes; D007465:Iodohippuric Acid; D007668:Kidney / Q000000981:diagnostic imaging* / Q000503:physiopathology; D007674:Kidney Diseases / Q000000981:diagnostic imaging* / Q000503:physiopathology; D004369:Pentetic Acid; D011083:Polycyclic Compounds; D011866:Radioisotope Renography; D012079:Renal Circulation; D013667:Technetium; D016284:Technetium Tc 99m Pentetate
D007457:Iodine Radioisotopes; D011083:Polycyclic Compounds; D007465:Iodohippuric Acid; D013667:Technetium; D004369:Pentetic Acid; D007444:Inulin; D016284:Technetium Tc 99m Pentetate