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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
This is because the rest of the lung can bring in enough oxygen to make up for the collapsed part of the lung. If atelectasis affects a large area or several large areas of the lungs, your body's organs and tissues may not get enough oxygen-rich blood. Conditions and factors that keep the lungs from properly expanding and filling with air can cause atelectasis. For example, atelectasis is very common after surgery.