Tension Pneumothorax → Needle Decompression → Lung Re-expansion A true life-saving emergency procedure! What is happening? In tension pneumothorax, air enters the pleural space and cannot escape. With every breath, pressure builds up, collapsing the affected lung and shifting the mediastinum, compressing the heart and great vessels. This rapidly leads to severe hypoxia, hypotension, and cardiac arrest if untreated. Clinical clues (don’t wait for imaging): • Severe respiratory distress • Unilater