Assessment of a 28-year old trauma patient reveals diminished breath sounds, asymmetrical chest expansion, severe chest pain, and an SPO2 of 90%, despite receiving oxygen via cannula at 5 L/min. These findings are most consistent with what diagnosis?
a. Complete airway obstruction
c. Viral pneumonia
D. Pleural effusion
Both viral pneumonia and pleural effusion can be ruled out as correct answers as they are not related to trauma. Breath sounds, though diminished, can be heard, and chest expansion, though asymmetrical, is present; both of these are not consistent with a complete airway obstruction. The physical assessment is consistent with the corret answer, pneumothorax.