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  • Title: Brain pH effects of NaHCO3 and Carbicarb in lactic acidosis.
    Author: Kucera RR, Shapiro JI, Whalen MA, Kindig NB, Filley GF, Chan L.
    Journal: Crit Care Med; 1989 Dec; 17(12):1320-3. PubMed ID: 2556245.
    Abstract:
    The effects of iv sodium bicarbonate (NaHCO3) and Carbicarb, an experimental buffer, were compared in a rat model of lactic acidosis induced by controlled hemorrhage and asphyxia. Although both NaHCO3 and Carbicarb were effective at alkalinizing the arterial blood in this model, NaHCO3 administration resulted in a rise in PaCO2 where Carbicarb did not (+9 +/- 2 vs. +2 +/- 2 torr at 2 min after infusion, p less than .01). Moreover, NaHCO3 resulted in a small decrease in intracellular brain pH as measured with P-31 nuclear magnetic resonance where Carbicarb afforded intracellular brain alkalinization (-0.03 +/- 0.01 vs. +0.08 +/- 0.02 pH units at 2 min, p less than .01). If these data are confirmed clinically, Carbicarb may offer advantages over NaHCO3 under conditions of fixed or limited ventilation.
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