Quality control of Tc-99m DTPA for measurement of glomerular filtration: concise communication.

Academic Article

Abstract

  • When technetium-99m DTPA is used to measure glomerular filtration rate (GFR), the accuracy depends on the supplier of the radiopharmaceutical. The error in GFR is due to protein binding, as we have shown by direct measurement. In 19 patients, GFR measured with Tc-DTPA and corrected for protein binding agreed with that measured simultaneously using Yb-169 DTPA (correlation coefficient 0.991). Without correction, Tc-DTPA gave falsely low values in patients having good renal function, in whom unbound activity cleared rapidly while bound activity remained in the circulation. When Tc-DTPA is used to measure GFR, the in vivo protein binding should be measured and used to correct the data.
  • Published In

    Keywords

  • Animals, Glomerular Filtration Rate, Humans, Male, Mathematics, Mice, Pentetic Acid, Protein Binding, Quality Control, Radioisotopes, Technetium, Technetium Tc 99m Pentetate, Ytterbium
  • Author List

  • Russell CD; Bischoff PG; Rowell KL; Kontzen F; Lloyd LK; Tauxe WN; Dubovsky EV
  • Start Page

  • 722
  • End Page

  • 727
  • Volume

  • 24
  • Issue

  • 8