FLIGHT PHYSIOLOGY EXPLORER
How Altitude Affects Your Patient
Cabin pressure in commercial aircraft is equivalent to an altitude of 6,000 to 8,000 feet. Explore how changing cabin altitude affects oxygenation, gas expansion, and hydration, and what it means for patient safety.
EST. OXYGEN SAT.
92%
GAS EXPANSION
+26%
DEHYDRATION RISK
Increased
At this altitude, patients with respiratory, cardiac, or neurological conditions are at increased risk. Pre-transport assessment is essential.
Key altitude milestones
Sea level
Baseline physiology. Oxygen saturation ~98%.
4,000 ft
Mild hypoxia begins. Sensitive patients may show early effects.
6,000 ft
Typical cabin pressure. Gas expansion ~26%.
8,000 ft
Maximum cabin altitude. Oxygen saturation ~90%. Significant gas expansion.
Illustrative educational tool. Values are approximate and do not replace clinical assessment or pre-transport medical clearance.