The following are treatments for atelectasis: • Clap (percussion) on the chest to loosen mucus. • Perform deep breathing exercises (深呼吸练习) (incentive spirometry). • Remove any obstruction by bronchoscopy or another procedure. • Tilt the person so their head is lower than their chest (called postural drainage). This allows mucus to drain more easily. • Treat a tumor or underlying condition, if there is one. • Turn the person so they are lying on their healthy side, allowing the collapsed area of lung to re-expand. • Use aerosolized respiratory treatments (inhaled medications) to open the airway. (from http://www.nlm.nih.gov/medlineplus/ency/article/000065.htm )