Step 1 → Respiratory Pleura and Air LeakPreview this topic sectionPreview the conditions. Plans unlock the full Step 1 details when you need them. Free Biochemistry Free Microbiology Plans Pleura and Air Leak conditions Pleural Effusions (Exudative) Pleural Effusions (Transudative) Pneumomediastinum Primary Spontaneous Pneumothorax Secondary Spontaneous Pneumothorax Tension Pneumothorax Traumatic Pneumothorax