While FEV1 is a valuable measure, it has limitations. It may not fully capture the complexity of lung diseases, particularly in early or mild cases. Additionally, FEV1 can be influenced by the individual's effort during the test, making it essential to ensure proper technique and repeatability. Finally, FEV1 alone may not be sufficient for diagnosing all types of respiratory conditions; it is often used in conjunction with other pulmonary function tests.
