Ill or injured persons may benefit from emergency oxygen in situations that include serious bleeding, divers with a decompression injury, difficulty breathing, suspected internal injury, and:

Ill or injured persons may indeed benefit from emergency oxygen in several critical situations where the body's oxygen delivery to tissues is compromised. The scenarios you've mentioned, which are serious bleeding, divers with decompression injury, difficulty breathing, and suspected internal injury, all have a common theme of potential or actual oxygen deprivation to tissues. The other situation that can also significantly benefit from emergency oxygen administration is shock.

Shock is a life-threatening condition where the circulatory system fails to deliver enough oxygen-rich blood to the body's tissues and organs. There are various types of shock, such as hypovolemic, cardiogenic, anaphylactic, septic, and neurogenic shock, each with different underlying causes but all resulting in inadequate tissue perfusion and oxygenation.

When tissues don't receive enough oxygen (hypoxia), it can lead to cellular damage and organ failure. Emergency oxygen can be crucial in these scenarios to help maintain sufficient oxygen levels in the blood, supporting vital organ function while the underlying cause of the emergency is being addressed.