What is the PaO2 value below which a driver should be disqualified (DQ) based on ABGs?

The PaO2 (partial pressure of oxygen in arterial blood) value at which a driver should be disqualified is critical for assessing the ability to safely operate a commercial vehicle. A PaO2 value below 65 mmHg indicates significant hypoxemia, which can lead to decreased cognitive and motor functions essential for driving.

When evaluating drivers, the minimum acceptable PaO2 value is based on standards set to ensure safety on the roads. A value below 65 mmHg suggests that the driver may not be receiving adequate oxygenation, which can compromise their physical capabilities and overall alertness. This is particularly important because oxygen levels are directly related to a person's ability to function effectively and respond to emergencies while driving.

Therefore, a PaO2 value of less than 65 mmHg would warrant disqualification to ensure both driver safety and public safety.