What is the purpose of providing oxygen to a passenger with suspected chest pain or hypoxia?

• A. To improve oxygenation and relieve hypoxia.
• B. To calm them by a false sense.
• C. To dehydrate.
• D. To socialize.

Answer: (A)

When someone has chest pain or suspected hypoxia, the goal of giving oxygen is to improve oxygenation throughout the body. In a pressurized cabin at altitude, the air carries less oxygen, so arterial oxygen levels can fall. Supplemental oxygen raises the fraction of inspired oxygen, which increases the amount of oxygen dissolved in the blood and improves hemoglobin saturation. This helps deliver more oxygen to vital organs like the heart and brain, can lessen symptoms of hypoxia, and may support recovery from chest-pain-related ischemia.

The other options don’t address the medical need. Oxygen isn’t used to calm someone through a placebo effect, it doesn’t dehydrate, and it isn’t intended to socialize.