PFTs (pulmonary function tests) are noninvasive examinations that demonstrate how effectively the lungs are functioning. The examinations gauge lung size, function, flow rates, and gas exchange. Your healthcare professional may use this information to diagnose and treat some lung conditions. There are two conditions that affect how air enters and leaves the lungs: Obstructive. This occurs when airway resistance makes it difficult for air to exit the lungs. Airflow is reduced as a result of this. Restrictive. This occurs when the chest muscles or lung tissue cannot expand sufficiently. Airflow issues result from this, primarily because of smaller lung capacities. PFT is possible using two techniques. Depending on the data your healthcare professional needs, these 2 approaches may be combined to perform other tests: Spirometry. A mouthpiece-equipped instrument called a spirometer is connected to a tiny electrical gadget. Plethysmography. To conduct the tests, you must either sit or stand within an airtight box that resembles a brief, square telephone booth.
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