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Encyclopedia > Narcosis

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Nitrogen narcosis (761 words)
Nitrogen narcosis, commonly referred to as "rapture of the deep," typically becomes noticeable at 100 ft underwater and is incapacitating at 300 ft, causing stupor, blindness, unconsciousness, and even death.
Nitrogen narcosis is caused by gases in the body acting in a manner described by Dalton's Law of partial pressures: the total pressure of a gas mixture is equal to the sum of the partial pressures of gases in the mixture.
Nitrogen narcosis may be differentiated from toxicity of oxygen, carbon monoxide, or carbon dioxide by the absence of such symptoms as headache, seizure, and bluish color of the lips and nail beds.
HighBeam Encyclopedia - narcosis (238 words)
NARCOSIS [narcosis], state of stupor induced by drugs.
The use of narcotics as a therapeutic aid in psychiatry is believed to have a history dating back to the use of opium for mental disorders by the early Egyptians.
Prolonged narcosis was employed at the beginning of the 20th cent.; its chief value was the reduction of excitement and tension in the psychotic patient.
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