Hypoxia, is a condition in which the body as a whole or a region of the body is deprived of adequate oxygen supply. It is classified into 4 groups:
- hypoxemic - oxygen is low
- anemic - decreased ability for hemoglobin to carry oxygen.
- ischemic - decreased blood flow.
- histotoxic - oxygen is reaching the cells, but the cells are unable to use the oxygen ( cyanide).