I will be sleeping on a plane for 6 hours. how can i prevent deep vein thrombosis?

Ask your doctor: If you are traveling a long distance by plane or car, consult your doctor before leaving to if you are at risk for blood clots and may be a candidate preventive medications. As your risks may not always be obvious, you may wear loose fitting clothes, use support hose, stand and walk when you are able . Flexing and extending you feet will also help the leg circulation.

Stay Hydrated: I would also recommend that you drink plenty of fluids and avoid alcohol when you fly. Dehydration can increase the lieklyhood of developing a DVT when you fly.

Movement important: If you can't walk around, flexing and extending your feet is especially helpful if you can do it against resistance.