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What is meant by pulmonary function test?

The pulmonary function test is one of the most effective methods of diagnosing and managing pulmonary affections.

Pulmonary function test (PFT) or spirometry is one of the important methods in the diagnosis and management of pulmonary diseases such as asthma.

These tests aid in screening the type of lung disease, measuring the significance of lung disease, and also in evaluating the effectiveness of the treatment provided. PFT generally involves taking a deep breath and exhaling as fast as possible. The equipment will measure the airflow and compare it with the previously calculated values to assess the progress of treatment.

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Source: https://www.cedars-sinai.edu/Education/Medical-Library/