A driver with a history of acute DVT should be advised to:

The recommendation for a driver with a history of acute deep vein thrombosis (DVT) to move and stretch his legs regularly while driving is crucial for promoting blood circulation and reducing the risk of further clot formation. Long periods of immobility, such as during long drives, can increase the likelihood of developing new clots, especially in individuals who have already experienced DVT.

Engaging in movement and leg stretches, such as flexing and extending the legs or taking brief breaks to walk around, helps maintain venous return and enhances circulation. This is particularly important for drivers who might spend extended hours in a seated position, as it counteracts the stagnation of blood flow that can lead to thrombosis.

While other options may address aspects of DVT management, they do not specifically cater to the immediate actions a driver should take to stay proactive while on the road. For instance, adjusting warfarin dosing or undergoing frequent INR testing might be part of the overall management plan but wouldn’t directly mitigate risks associated with driving. Adding low-dose aspirin can also be part of a therapeutic approach, but again, it doesn't address the immediate need for in-vehicle safety and prevention strategies.