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Flight and Human Body
Transcript of Flight and Human Body
http://en.wikipedia.org/wiki/Hypoxia_(medical) State of too little oxygen in the body. Impairs the brain and other organs functions. 1999 Plane Crash 4 Classifications of Hypoxia: Condition in which the edges of your sight gray out to a point, where you only have a narrow field of vision straight ahead. Payne Stewart (famous golfer) and five others died in a plane crash in 1999. The crew lost consciousness at 48,900 ft. There was a loss of cabin pressurization, and so the crew was not able to receive enough oxygen. Therefore, hypoxia was most likely the result for the lost of consciousness. Hypoxemic hypoxia - "is a state of oxygen deficiency in which the arterial content of oxygen is low because the arterial partial pressure of oxygen is low."
Anemic hypoxia - "is a state in which the arterial partial pressure of oxygen is normal, but total oxygen content of the blood is reduced due to a decreased ability for hemoglobin to carry oxygen."
Ischemic hypoxia - "occurs when there is decreased blood flow."
Histotoxic hypoxia - "in which quantity of oxygen reaching the cells is normal, but the cells are unable to use the oxygen effectively, due to disabled oxidative phosphorylation enzymes." You can't tell if you have symptoms hypoxia. "The brain centre that would warn him of decreasing efficiency is the first to be affected and the pilot enjoys a misguided sense of well-being. Neither is there any pain, or any other warning signs that tell him that his alertness is deteriorating. The effects of hypoxia progress from euphoria (feeling of well being) to reduced vision, confusion, inability to concentrate, impaired judgment, slowed reflexes to eventual loss of consciousness."
Use of drugs such as opiates
Use of alcohol Hypoxemic hypoxia may be due to the following: