At what altitude might casualties benefit from supplemental oxygen?

Supplemental oxygen becomes beneficial at higher altitudes primarily due to decreased atmospheric pressure and the corresponding reduction in the partial pressure of oxygen available for respiration. At around 10,000 feet, many individuals start experiencing the effects of altitude sickness, including hypoxia, which can hinder physical performance and cognitive function.

At this altitude, the ambient oxygen concentration is sufficiently low that some individuals may struggle to maintain adequate oxygen saturation levels in the blood. Administering supplemental oxygen at this point can help prevent hypoxia and optimize oxygen delivery to the tissues, improving overall performance and reducing the risk of altitude-related illness.

As altitude increases further, such as at 15,000 feet, the need for supplemental oxygen becomes even more critical. However, 10,000 feet is the recognized threshold where symptoms and decreased performance can begin to manifest, making it a key point for intervention with supplemental oxygen.