A 24-year-old female with a history of asthma presents to the ED with recent viral infection associated with cough and central chest pain. You are concerned about a pneumomediastinum.

1. State (3) pertinent features you would look for on the CXR (3 marks) 3 marks

2. State (6) other patient or clinical factors that predispose a patient to a pneumomediastinum (6 marks) 6 marks

3. How would you manage this uncomplicated pneumomediastinum? (5 marks) 5 marks

4. State (4) significant or life-threatening complications of pneumomediastinum. (4 marks) 4 marks