Psychology Wiki   34,114pages on this wiki    This article needs
rewriting to enhance its relevance to psychologists.. Please
help to improve this page yourself if you can..  Hypoxaemia (or
hypoxemia) is an abnormal deficiency in the concentration of
oxygen in arterial blood (Mosby's Medical Dictionary). A
frequent error is made when the term is used to describe poor
tissue diffusion as in hypoxia. It is possible to have a low
oxygen content (eg due to anaemia) but a high PO2 in arterial
blood so incorrect use can lead to confusion.     Causes are
classified into 5 groups:    1. Low inspired fractional
concentration of oxygen (low FiO2)   2. Alveolar hypoventilation
3. Impairment of diffusion across blood-gas membrane   4. Shunt
5. Ventilation-perfusion inequality   Low inspired oxygen
fraction (low FiO2)Edit  See also: FiO2 If the concentration of
oxygen in the inspired gas is low, then a reduced amount of
oxygen is delivered to the gas exchanging parts (alveoli) of the
lung each minute. This can result