Altitude, Oxygen, and Performance

• Night vision (non-smokers)
  • reduced by 10% at 5K ft, by 28% at 10K ft
• Cognitive symptoms (slowed thinking)
  • Begins when arterial oxygen saturation < 87% (medicare allows prescriptions at this point)
  • Arterial oxygen saturation = 87% at 5,000 ft
  • Incapacitation occurs at about 65% (~20K ft)

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