Hypoxia
Hypoxia is a state of oxygen deficiency in the body, which is sufficient to
cause an impairment of function. Hypoxia is caused by the reduction in
partial pressure of oxygen, inadequate oxygen transport, or the inability of
the tissues to use oxygen.
In brief, being drunk is kind of the same as being exposed to high altitude.
In both cases, oxygen to your brain and muscles is reduced.
Hypoxic Hypoxia is a reduction in the amount of oxygen passing into the
blood. It is caused by a reduction in oxygen pressure in the lungs, by a
reduced gas exchange area, exposure to high altitude, or by lung disease.
[This is the hypoxia that is a hazard to aviators.]
Pemic Hypoxia is defined as a reduction in the oxygen carrying capacity of
the blood. It is caused by a reduction in the amount of hemoglobin in the
blood or a reduced number of red blood cells. A reduction in the oxygen
transport capacity of the blood occurs through blood donation, hemorrhage,
or anemia. A reduction in the oxygen carrying capacity of the blood occurs
through drugs, chemicals, or carbon monoxide. [This hypoxia usually
experienced by smokers.]
Stagnant Hypoxia is an oxygen deficiency due to poor circulation of the
blood or poor blood flow. Examples of this condition are high "G" forces,
prolonged sitting in one position or hanging in a harness, cold
temperatures, and positive pressure breathing. [This hypoxia usually
experienced when sitting for hours in a boring class.]
Histotoxic Hypoxia is defined as the inability of the tissues to use oxygen.
Examples are carbon monoxide and cyanide poisoning. Certain narcotics,
chewing tobacco, and alcohol will prevent oxygen use by the tissues. [This
hypoxia usually experienced after drinking too much.]
Dr James MD
Reprinted with Permission
