Characterization of HCO3/ CO 2 pool sizes and kinetics in infants Academic Article uri icon


  • The first bicarbonate pool sizes and kinetic data necessary for the interpretation of substrate oxidation studies have been determined in six fed, nonacidotic infants, ages 2.5 to 5 months. Following an intravenous bolus of NaH 13CO3(50 mol/kg), breath samples were collected over 240 min for the analysis of breath 13CO2. Each breath 13CO 2 disappearance curve was fitted to a multicompartmental bicarbonate model previously derived in adults. The mean sizes of the three bicarbonate pools were: 7.4 0.8 mmol/kg (central pool), 15.1 4.8 mmol/kg (rapidly exchanging peripheral pool), and 8.8 3.5 mmo/kg (slowly exchanging peripheral pool). The mean percentage dose recovery was 57 10%. The pool sizes suggested that extensive metabolic exchange of carbon between HCO 3 and organic metabolites occurred in the infant. 1985 International Pediatric Research Foundation, Inc.

published proceedings

  • Pediatric Research

altmetric score

  • 3

author list (cited authors)

  • Irving, C. S., Lifschitz, C. H., Wong, W. W., Boutton, T. W., Nichols, B. L., & Klein, P. D.

citation count

  • 24

complete list of authors

  • Irving, CS||Lifschitz, CH||Wong, WW||Boutton, TW||Nichols, BL||Klein, PD

publication date

  • January 1985