Pulmonary Function Test:
Pulmonary functions tests (PFTs) provide information about a clients manifestation by measuring lung volumes, lung mechanics, and diffusion capabilities of the lungs. PFTs peribrmed in a pulmonary function laboratory can measure respiratory volumes and capabilities. On the other hand, PFTs done outside of a laboratory are modified to include ventilation tests of forced expiratory volume, vital capacity, and maximal voluntary ventilation measures. A handheld measure of inspiratory flow is called a peak flow. Many clients with asthma use a peak flowmeter at home to monitor changes in their condition and responses to treatment.
Education about the purpose, procedure, and implications of the test is performed by the nurse and reinforced by the examiner. Explicit instructions of each maneuver are given during the testing. Instruct clients that it is normal to feel short of breath after the test. Clients should not smoke or use a bronchodilator 6 hours before undergoing a PFT.