Abstract
Summary
A close correlation of “extracellular fluid volume” as measured at equilibration and after collection of totally excreted inulin and sodium ferrocyanide was obtained in infants, thus shortening considerably the time needed for the determination. The ratios between the sodium ferrocyanide and inulin spaces were 0.96 to 1.04. Sodium ferrocyanide equilibrated in a much shorter time than did inulin. The comparative rate of glomerular filtration as measured by inulin and sodium ferrocyanide suggests tubular reabsorption of the latter substance in infants. No evidence of urinary disturbance was found in the infants given sodium ferrocyanide.
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