Professional and Linguistic Assessments Board (PLAB) Practice Exam

What is the target FEV1% in healthy adults?

1. Below 60%

2. Between 60-80%

3. Above 75%

4. Above 90%

The correct answer is: Above 75%

The target FEV1% in healthy adults is indeed considered to be above 75%. FEV1, or forced expiratory volume in one second, is a key measurement used in spirometry to assess lung function. In healthy adults, a value above 75% typically indicates that the individual has adequate lung capacity and airflow, which suggests normal respiratory function. Values below this threshold can indicate varying degrees of obstructive or restrictive lung disease. It is important to note that while the exact percentages can vary slightly based on population studies and specific guidelines, a general benchmark for healthy adults recognizes that a FEV1% greater than 75% is indicative of good pulmonary health. This measurement helps in the early detection of conditions like asthma, chronic obstructive pulmonary disease (COPD), and other respiratory issues, making it a crucial parameter for clinical assessment.