Abstract
Purpose
The objective of the study was to undertake a clinical audit of departmental performance in the measurement of glomerular filtration rate (GFR) using the coefficient of variation (CV) of extracellular fluid volume (ECFV) as the benchmark. ECFV is held within narrow limits in healthy subjects, narrower than GFR, and should therefore have a low CV.
Methods
Fifteen departments participated in this retrospective study of healthy renal transplant donors. Data were analysed separately for men (n ranged from 28 to 115 per centre; total = 819) and women (n = 28–146; 1,059). All centres used the slope-intercept method with blood sample numbers ranging from two to five. Subjects did not fast prior to GFR measurement. GFR was scaled to body surface area (BSA) and corrected for the single compartment assumption. GFR scaled to ECFV was calculated as the terminal slope rate constant and corrected for the single compartment assumption. ECFV/BSA was calculated as the ratio of GFR/BSA to GFR/ECFV.
Results
The departmental CVs of ECFV/BSA and GFR/BSA ranged from 8.3 to 25.8% and 12.8 to 21.9%, respectively, in men, and from 9.6 to 21.1% and 14.8 to 23.7%, respectively, in women. Both CVs correlated strongly between men and women from the same centre, suggesting department-specific systematic errors. GFR/BSA was higher in men in 14 of 15 centres, whereas GFR/ECFV was higher in women in 14 of 15 centres. Both correlated strongly between men and women, suggesting regional variation in GFR.
Conclusion
The CV of ECFV/BSA in normal subjects is a useful indicator of the technical robustness with which GFR is measured and, in this study, indicated a wide variation in departmental performance.
Similar content being viewed by others
References
Bröchner-Mortensen J, Giese J, Rossing N. Renal inulin clearance versus total plasma clearance of 51Cr-EDTA. Scand J Clin Lab Invest 1969;23:301–5.
Cohen ML. Radionuclide clearance techniques. Semin Nucl Med 1974;4:23–38.
Chantler C, Garnett ES, Parsons V, Veall N. Glomerular filtration rate measurement in man by the single injection method using 51Cr-EDTA. Clin Sci 1969;37:169–80.
Gaspari F, Perico N, Ruggenenti P, Mosconi L, Amuchastequi CS, Guerini E, et al. Plasma clearance of nonradioactive iohexol as a measure of glomerular filtration rate. J Am Soc Nephrol 1995;6:257–63.
Peters AM. Expressing glomerular filtration rate in terms of extracellular fluid volume. Nephrol Dial Transplant 1992;7:205–10.
Bird NJ, Michell AR, Peters AM. Accurate measurement of extracellular fluid volume from the slope/intercept technique after bolus injection of a filtration marker. Physiol Meas 2009;30:1371–9.
Cowley Jr AW, Roman RJ. Control of blood and extracellular volume. Baillieres Clin Endocrinol Metab 1989;3:331–69.
Skorecki KL, Brenner BM. Body fluid homeostasis in man. A contemporary overview. Am J Med 1981;70:77–88.
Peters AM. The kinetic basis of glomerular filtration rate measurement and new concepts of indexation to body size. Eur J Nucl Med Mol Imaging 2004;31:137–49.
Haycock GB, Schwartz GJ, Wisotsky DH. Geometric method for measuring body surface area: a height-weight formula validated in infants, children, and adults. J Pediatr 1978;93:62–6.
Bröchner-Mortensen J. A simple method for the determination of glomerular filtration rate. Scand J Clin Lab Invest 1972;30:271–4.
Boer P. Estimated lean body mass as an index for normalization of body fluid volumes in man. Am J Physiol 1984;247:F632–5.
Bird NJ, Peters C, Michell AR, Peters AM. Using the slope-only technique and estimated glomerular filtration rate for checking the reliability of slope-intercept measurement of glomerular filtration rate. Nucl Med Commun 2008;29:1086–92.
Vervoort G, Willems HL, Wetzels JFM. Assessment of glomerular filtration rate in healthy subjects and normoalbuminuric diabetic patients: validity of a new (MDRD) prediction equation. Nephrol Dial Transplant 2002;17:1909–13.
Bird NJ, Peters C, Michell AR, Peters AM. Association between glomerular filtration rate and extracellular fluid volume in normal subjects and patients with renal impairment. Scand J Clin Lab Invest 2008;68:39–49.
Simon AHR, Lima PRM, Almerinda M, Ribeiro Alves VF, Bottini PV, Lopes de Faria JB. Renal haemodynamic responses to a chicken or beef meal in normal individuals. Nephrol Dial Transplant 1998;13:2261–4.
Wesson LG. Renal hemodynamics in physiological states. In: Wesson LG, editor. Physiology of the human kidney. New York: Grune & Stratton; 1969. p. 96–108.
Poulsen HL, Jensen HE, Parving HH. Extracellular fluid volume determined by a single injection of inulin in men with untreated essential hypertension. Scand J Clin Lab Invest 1977;37:691–6.
Ladegaard-Pedersen HJ. Measurement of extracellular volume and renal clearance by a single injection of inulin. Scand J Clin Lab Invest 1972;29:145–53.
Bird NJ, Peters C, Michell AR, Peters AM. Comparison of GFR measurements assessed from single versus multiple samples. Am J Kidney Dis 2009;54:278–88.
Conflicts of interest
None.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Peters, A.M., Howard, B., Neilly, M.D.J. et al. The reliability of glomerular filtration rate measured from plasma clearance: a multi-centre study of 1,878 healthy potential renal transplant donors. Eur J Nucl Med Mol Imaging 39, 715–722 (2012). https://doi.org/10.1007/s00259-011-2024-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00259-011-2024-5