Methanoglobnemia is mispelled, it's actually methemoglobinemia
Methemoglobinemia is a blood disorder in which an abnormal amount of methemoglobin -- a form of hemoglobin -- is produced. Hemoglobin is the molecule in red blood cells that distributes oxygen to the body. Methemoglobin cannot release oxygen.
In methemoglobinemia, the hemoglobin is unable to release oxygen effectively to body tissues.