What is the purpose of oxygen saturation monitoring in flight?

• A. Diagnoses pneumonia
• B. Monitors blood glucose
• C. Provides an objective measure of oxygen delivery; guides supplemental oxygen use
• D. Measures heart rate

Answer: (C)

Oxygen saturation monitoring provides an objective readout of how well oxygen is being delivered to the tissues, which is crucial in flight because altitude lowers the amount of oxygen available. A pulse oximeter gives a real-time, noninvasive estimate of arterial oxygen saturation (SpO2). By watching this value, you can determine when supplemental oxygen is needed to maintain adequate oxygen delivery to organs and tissues.

This tool isn’t used to diagnose pneumonia, which requires clinical assessment and imaging; it doesn’t measure blood glucose, a separate metabolic parameter; and while it coincides with heart rate, it does not measure heart rate itself. In flight, the key purpose is to guide oxygen use so tissue oxygenation stays within safe limits.