Simultaneous estimation of tubular and glomerular renal clearance with separate estimation of each side using a...

A measuring device for simultaneous determination of glomerular and tubular clearance with separation of both sides is described. The patient lies on a table. Two detectors mounted on the ceiling count the residual radioactivity in the body except in the kidneys which are shielded by a lead block. Two other detectors count the renal radioactivity. The total renal clearance is calculated by the whole-body clearance curve and plasma activity. The fraction cleared by each side is calculated by the renal activity time curve. Radiopharmaceuticals were: 99Tcm-EDTA and 131I-hippuran. Values for normal patients are given.