FAA Private Pilot Airplane (PAR)Aeromedical Factors and ADMMedium
A pilot becomes anxious during unexpected turbulence and begins breathing rapidly and deeply. Shortly after, the pilot experiences tingling in the fingers, dizziness, and a feeling of lightheadedness. What is the most likely cause of these symptoms, and what is the recommended corrective action?
- ACarbon monoxide poisoning; the pilot should turn off the cabin heater immediately
- BMotion sickness; the pilot should focus on a distant point outside the aircraft
- CHypoxia; the pilot should immediately don supplemental oxygen
- DHyperventilation; the pilot should consciously slow the breathing rate or talk aloud
Show answer & explanationAnswer & explanation
Correct answer: D. Hyperventilation; the pilot should consciously slow the breathing rate or talk aloud
Rapid, deep breathing due to anxiety or stress causes excessive elimination of carbon dioxide, leading to hyperventilation symptoms like tingling, dizziness, and lightheadedness; the corrective action is to consciously slow the breathing rate, often by talking aloud or breathing into a bag.
Why the other options are wrong
- A. Carbon monoxide poisoning typically presents with headache and confusion and is linked to exhaust fumes, not anxiety-driven breathing.
- B. Motion sickness typically causes nausea and sweating rather than tingling fingers from rapid breathing.
- C. Hypoxia symptoms are similar but are caused by insufficient oxygen, not by rapid breathing from anxiety, and oxygen would not correct hyperventilation.
Hyperventilation
Abnormally rapid and deep breathing that expels too much carbon dioxide from the blood, causing dizziness, tingling extremities, and lightheadedness.
- Often triggered by stress, fear, or anxiety in flight
- Symptoms mimic hypoxia but occur without altitude cause
- Corrective action: slow breathing, talk aloud, or breathe into a bag
Memory trick: Too much air out (CO2 loss) not too little air in