Bicarbonate (HCO3-)

Arterial Blood Gas

Normal Reference Ranges

Adult

22 - 26 mEq/L

Pediatric

22 - 26 mEq/L

Clinical Significance

Metabolic component of acid-base balance, primarily regulated by the kidneys.

Causes of High

  • Metabolic Alkalosis (Vomiting, Diuretics)
  • Compensation for respiratory acidosis (Chronic COPD)

Causes of Low

  • Metabolic Acidosis (MUDPILES)
  • Compensation for respiratory alkalosis