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7. Pulmonary Function Tests

Pulmonary function tests determine how well the lungs are working. Spirometry measures lung volume and how quickly a person can inhale and exhale. An exercise stress test monitors lung function while the person is riding a stationary bike or walking on a treadmill. Testing also includes pulse oximetry, which measures the oxygen saturation of the blood, and arterial blood gas to measure the levels of oxygen and carbon dioxide.

spirometry lung function Koldunova_Anna / Getty Images

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