Which action is the primary response to suspected hypoxia?

Which action is the primary response to suspected hypoxia?

• A. Descent to below 10,000 feet and administer 100% oxygen
• B. Increase speed of ascent
• C. Ignore symptoms
• D. Take antihistamines

Answer: (A)

Hypoxia happens when not enough oxygen reaches the body's tissues, so the priority is to restore oxygen delivery as quickly as possible. The most effective in-flight response is to descend to a lower altitude where the air is denser and provide 100% oxygen. Descending reduces the body's need for compensating for low ambient oxygen and raises the amount of oxygen available to the lungs, while 100% oxygen maximizes the oxygen content entering the bloodstream. This combination directly addresses the oxygen deficit and helps symptoms resolve faster. Increasing altitude would worsen the situation, and ignoring symptoms or taking antihistamines does not improve oxygenation and can delay proper treatment.

Hypoxia happens when not enough oxygen reaches the body's tissues, so the priority is to restore oxygen delivery as quickly as possible. The most effective in-flight response is to descend to a lower altitude where the air is denser and provide 100% oxygen. Descending reduces the body's need for compensating for low ambient oxygen and raises the amount of oxygen available to the lungs, while 100% oxygen maximizes the oxygen content entering the bloodstream. This combination directly addresses the oxygen deficit and helps symptoms resolve faster. Increasing altitude would worsen the situation, and ignoring symptoms or taking antihistamines does not improve oxygenation and can delay proper treatment.