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HCO3−; the ion remaining after the first dissociation of carbonic acid; a central buffering agent in blood.
- standard b. the plasma b. concentration of a sample of whole blood that has been equilibrated at 37°C with a carbon dioxide pressure of 40 mm Hg and an oxygen pressure greater than 100 mm Hg; abnormally high or low values indicate metabolic alkalosis or acidosis, respectively.
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bi·car·bon·ate (')bī-'kär-bə-.nāt, -nət n an acid carbonate
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bi·car·bo·nate (bi-kahrґbə-nāt) any salt containing the HCO3− anion.Medical dictionary. 2011.