How I Learned To Love Supplemental Oxygen

Hypoxia can be a threat even at so-called non-oxygen altitudes. Mitigations include diligent preflights and monitoring.

Tuesday, December 24, 2024 at 05:00 AM ET

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If your aircraft doesn’t feature a built-in oxygen system, a portable bottle like the one pictured at right is a good solution. They come in various sizes and several accessories are available, including full face masks with microphones and pulse oximeters to measure oxygen saturation, from a wide range of vendors.

Key Takeaways:

Hypoxia is an insidious and rapidly debilitating threat, capable of incapacitating pilots within minutes at altitude due to impaired judgment and varied, hard-to-self-detect symptoms.
There are four types of hypoxia (hypoxic, hypemic, stagnant, histotoxic), with susceptibility increased by factors like alcohol, drugs, and carbon monoxide.
Effective mitigation requires diligent preflight oxygen system checks (PRICE mnemonic) and, crucially, immediate action: don masks, descend, and declare an emergency at the first suspicion of hypoxia or pressurization failure.
Pilot training, such as the FAA Aerospace Physiology Course, is highly recommended to personally identify individual hypoxia symptoms and understand the dangerously short Time of Useful Consciousness.

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September 5, 2014: An experienced pilot and their pilot-rated passenger departed in a Daher TBM 900 from Rochester, N.Y., with a planned destination of Naples, Fla. During cruise, at FL280, the pilot reported an “indication that is not correct in the plane” to ATC. A descent to FL180 was requested, and ATC initially cleared the aircraft to FL250 pending further coordination.

The controller queried the flight on whether he was declaring an emergency, to which he replied, “Not yet, but we will let you know.” The controller soon cleared the flight to FL200 and provided a vector for the descent. Despite several readbacks, the aircraft never changed course. Four minutes after initially reporting the problem, the pilot had become unresponsive.