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What is Atelectasis? Collapse of part or all of one lung, preventing normal oxygen absorption. Frequent signs and symptoms. Sudden, major collapse: Chest pain. Shortness of breath; rapid breathing. Shock (severe weakness, paleness of skin, rapid heartbeat). Dizziness. Gradual collapse: Cough. Fever. Shortness of breath. No other symptoms. Causes
Hypoventilation is the most common cause of atelectasis, especially after chest surgery. Airway obstruction may be caused when something blocks a passage either inside the lung (like mucus or a foreign object) or outside of the lungs (like a tumor which press on the airway and cause obstruction).