An 18 year old male was brought to your rural emergency department with a head injury. On arrival he was found to have a GCS of 5, and was intubated. He is now stable, and you plan on transferring him to a tertiary care center 3 hours away for further investigations and care. Before the transfer, a chest X-ray was done and showed a small left sided pneumothorax that is 5% in size. What is your next step?