A 20-year-old male smoker presents with right-sided pleuritic chest pain. No past medical history. Hobbies include scuba diving. Exam: absent breath sounds on the right and hyper-resonant percussion. Vitals: HR 80 BP 125/70 RR 20 SpO2 95% RA.

1. What is the most common risk factor for spontaneous pneumothorax? 1 mark

You perform a lung ultrasound to try and evaluate for the diagnosis of pneumothorax.

2. State three findings you would look for on ultrasound that would confirm or exclude pneumothorax. 3 marks

3. Complete the table with two justifications for two possible treatment options for primary spontaneous pneumothorax. 4 marks

4. State four pieces of advice you would give the patient upon discharge. 4 marks