If PFTs demonstrate FEV1 less than what value, should further assessment be obtained?

The correct value representing a threshold for further assessment following pulmonary function tests (PFTs) is 65. When the forced expiratory volume in one second (FEV1) is less than this value, it indicates a significant limitation in lung function, which can impact a person’s ability to safely operate a commercial vehicle.

Clinically, an FEV1 of less than 65% of the predicted value can suggest that a driver might have obstructive or restrictive lung disease, which could lead to difficulties in breathing, reduced oxygenation, and overall compromised physical capability. Such conditions pose safety risks, not only to the driver but also to others on the road. Thus, further evaluation is essential to determine the severity of the lung condition and whether it is manageable enough to ensure safe driving.

Values below this threshold indicate that an individual may require additional testing or interventions, such as imaging studies, a detailed assessment for chronic respiratory conditions, or possibly even a referral to a specialist. This careful approach helps maintain safety standards in transportation.