Patients with a hemoglobin of greater than 8 g/dl may travel without problems assuming there is no coexisting condition such as cardiovascular or respiratory disease. If the hemoglobin is less than 7.5 g/dl, special assessment should be made and the use of supplemental oxygen should be considered.
Patients with sickle cell anaemia should travel with supplemental oxygen and should defer travel for approximately 10 days post acute attack.
Patients with anemia must undergo medical assessment before embarking on a flight. Anyone with a hemoglobin level below 8.5 g per dL (85 g per L), as in sickle cell anemia, should have an oxygen supplement.