﻿ Anion gap definition - Medical Dictionary definitions of
popular medical terms easily defined on MedTerms  Definition of
Anion gap  Anion gap: A measurement of the interval between the
sum of "routinely measured" cations minus the sum of the
"routinely measured" anions in the blood. The anion gap = (Na+ +
K+) - (Cl- + HCO3-) where Na- is sodium, K+ is potassium, Cl- is
chloride, and HCO3- is bicarbonate.   Last Editorial Review:
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