[Simplified methods for the measurement of renal clearance. Comparison of the results of Cr51-EDTA slope clearance, iodohippurate clearance and endogenous creatinine clearance].

Endogenous creatinine clearance proved to be unreliable in comparison to the 51Cr-EDTA-slope clearance with compartment analysis (examination time 4 hours). Tauxe's method of estimation of GFR can be recommended because of nearly perfect correlation with the 51Cr-EDTA-slope clearance (r = 0.959, n = 169, p less than 0.001). Estimation of ERPF according to Tauxe showed a moderate good correlation (r = 0.843, n = 140, p less than 0.001) with Oberhausen's method of clearance calculation (shoulder detector technique).