Of value in investigating patients with cyanosis and a normal pO2. Levels may be raised in congenital haemoglobin M disorders and drug toxicity associated with nitrites or other oxidising agents
Reference Range: < 2% of Total Haemoglobin
Levels may be higher in infants.
Both Arterial and Venous Blood Gas specimens are acceptable.
Methaemoglobin is now automatically reported on every blood gas request.