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[Estimation of 131I-Iodohippurate-clearance by a simplified method using a single plasma sample (author's transl)].

Theoretical volumes calculated from the reciprocal of the plasma concentration after intravenous injection of 131I-Iodohippurate were compared in 95 patients with clearance values calculated by the 2-compartment-method and in 18 patients with conventional PAH-clearance. For estimating Hippurate-clearance from a single blood sampling the most favorable time is 45 min. after injection (r = 0.96; clearance < 400/ml/min.: r = 0.98). Clearance values may be derived from the formula: C = 0.4 + 7.26 V - 0.021 . V2 (V = injected activity/activity per l plasma taken 45 min. after injection). The simplicity, precision and reproducibility of the above mentioned clearance-method is emphazised.