Which factor is a recognized risk related to oxygen delivery in flight?

• A. In-flight oxygen is never in danger.
• B. Power or oxygen system malfunction, battery drain, or connection issues.
• C. Oxygen delivery is unaffected by power supply.
• D. Oxygen must be discarded after each flight.

Answer: (B)

Oxygen delivery in flight depends on a reliable power and connection path; a real risk is that power or oxygen system malfunction, battery drain, or loose connections can interrupt the flow. If the power fails, a battery runs out, or hoses and fittings come loose due to vibration, the patient may not receive the needed oxygen, which is especially critical at altitude. This is why preflight checks focus on confirming the oxygen system is powered and charged, connections are secure, and there are backup options if any part of the system fails. The other statements don’t fit real-world operations: oxygen isn’t guaranteed to be safe in every flight, delivery can be affected by power, and oxygen doesn’t need to be discarded after a flight.