What should be done if someone exhibits symptoms of mediastinal emphysema?

If someone exhibits symptoms of mediastinal emphysema, the priority is to rule out an arterial gas embolism (AGE), as the symptoms can often overlap. ADMINISTERING 100% O2 subsequently helps to reduce the risk of further complications. Providing high concentrations of oxygen facilitates the elimination of nitrogen bubbles from the bloodstream and improves the body's oxygenation during such emergencies. This approach is especially important in a diving context where decompression sickness and AGE can occur.

Reducing the possibility of AGE is critical because it can lead to severe complications, including neurological damage or even death. Thus, the immediate focus should be on confirming the presence of AGE and treating the patient with 100% oxygen to mitigate any potential effects and stabilize their condition.