Mediastinal emphysema
Often, no treatment is required as the air is gradually absorbed from the mediastinum. If pneumomediastinum is accompanied by pneumothorax, a chest tube may be placed. Breathing high concentrations of oxygen may allow the air in the mediastinum to be absorbed more quickly.
The outlook depends on the disease or events that caused the pneumomediastinum.
In rare cases, so much air may accumulate in the mediastinum that veins are compressed, leading to low blood pressure.
Go to the emergency room or call the local emergency number (such as 911) if you have severe chest pain or difficulty breathing.