Bicarbonate is used in monitoring the acid-base-balance in blood. Abnormal values indicate disorders associated with disturbances of the metabolic and respiratory systems.

Reference Ranges

Adults22 – 29 mmol/L (mEq/L)
Each laboratory should check if the reference ranges are transferable to its own patient population and determine own reference ranges if necessary. For diagnostic purposes, the results should always be assessed with the patient’s medical history, clinical examinations and other findings.

Increased in

  1. Prolonged vomiting
  2. Duodenal obstruction
  3. Cystic fibrosis
  4. Drugs e.g. narcotics, barbiturates
  5. Chronic obstructive pulmonary disease
  6. Central nervous system trauma

Decreased in

  1. Diabetic acidosis
  2. Renal failure
  3. Diarrhoea
  4. Pneumonia
  5. Central nervous system infection
  6. Congestive heart failure


< All Reference Ranges