FEV1

FEV1, or Forced Expiratory Volume in one second, measures how much air a person can forcefully exhale in the first second of a breath. It is an important test for assessing lung function and detecting issues like airway narrowing or obstruction. A lower FEV1 value indicates more restricted airflow, which can be linked to conditions such as asthma or COPD. The test helps doctors diagnose, monitor, and manage lung diseases by providing a clear indication of how well the lungs are working to move air in and out.