Admin_NHT Staff asked 6 years ago Pulmonary Function Tests (PFT) are performed on individuals to test their lung capacity and they are non-invasive in nature. These tests aim to measure the lung volume, flow rate, lung capacity, and gas exchange. Lung disorders are classified into two types: Obstructive (decreased air flow due to an airway restriction), and Restrictive (inability of the lungs or associated muscles to expand thereby decreasing the air volume). There are two ways to do a PFT: Spirometry (spirometer with a mouthpiece hooked to a small electric device), and Plethysmography (person is made to sit/stand in a air-tight box more like a telephone booth for the tests).
Pulmonary Function tests are usually performed as routine check-ups. But the doctor may also advise a PFT to test for allergies, trouble in breathing due to any accident or chest injury, chronic lung conditions like asthma, bronchitis, asbestosis, sarcoidosis, scleroderma, or to test for any obstructions or restrictions in the airways. Although, the test is non-invasive, there are some risks associated like coughing, shortness of breathlessness, dizziness, or an asthma attack. Before the test, you will be asked to empty your bladder and remove your dentures, if you have any.