FAA Private Pilot Helicopter (PRH)Human FactorsMedium
During a stressful cross-country flight, a pilot begins breathing rapidly and shallowly. Shortly after, the pilot reports tingling in the fingers, lightheadedness, and a feeling of suffocation. What is the most likely cause and appropriate corrective action?
- AMotion sickness; the pilot should focus on a distant point outside the aircraft
- BCarbon monoxide poisoning; the pilot should shut off the cabin heater
- CHyperventilation; the pilot should consciously slow the breathing rate or talk aloud
- DHypoxia; the pilot should immediately descend to a lower altitude
Show answer & explanationAnswer & explanation
Correct answer: C. Hyperventilation; the pilot should consciously slow the breathing rate or talk aloud
Rapid, shallow breathing from stress or anxiety causes excessive elimination of carbon dioxide, producing hyperventilation symptoms such as tingling extremities and lightheadedness. The correction is to consciously slow the breathing rate, often achieved by talking aloud or breathing into a bag.
Why the other options are wrong
- A. Motion sickness produces nausea and cold sweating, not this specific breathing-related symptom set.
- B. CO poisoning presents with headache and drowsiness, not typically finger tingling from rapid breathing.
- D. Hypoxia symptoms are similar but the cause here is stress-induced overbreathing, not low oxygen.
Hyperventilation
Abnormally rapid and deep breathing that eliminates too much carbon dioxide from the blood, causing dizziness, tingling, and muscle spasms.
- Often triggered by stress, anxiety, or fear
- Symptoms mimic hypoxia, making differentiation important
- Corrected by slowing breathing rate, talking aloud, or breathing into a bag
Memory trick: 'Too much air out' causes tingling fingers — slow down and talk it out.