Question: is tco2 the same as hco3?
Answer: Regulated primarily by the kidneys, HCO3 is the metabolic component of acid-base balance. ... Measurement of TCO2 as part of an electrolyte profile is useful chiefly to evaluate HCO3 concentration. TCO2 and HCO3 are useful in the assessment of acid-base im bal ance (along with pH and PCO2) and electrolyte imbalance.