What causes deep vein thrombosis (DVT), and how serious can this in-flight medical condition be for air travelers?

Deep vein thrombosis is caused by a blood clot forming in the lower leg. If the clot breaks off, it may travel to the lungs which could then be fatal. If you develop symptoms such as pain, redness and swelling in a leg, you should seek medical help immediately.

What causes the above symptoms to develop?

DVT can occur in your lower legs anytime you are sitting in one position for a long time without moving. Some research shows that you are at three times the risk of developing this serious medical condition when you fly. Driving, traveling by bus or train, or even sitting in your favorite easy chair at home can also cause it.

How can air passengers protect themselves from this life-threatening condition?

You can help prevent this condition from happening by increasing circulation in your legs. A number of experts suggest wearing loose clothing and avoiding tight fitting pants or stockings, move and exercise your legs frequently when sitting, changing your sitting position often, not sitting with you legs crossed, walk up and down the aisle every half-hour or so and drinking lots of water so you will not become dehydrated.

Obesity, or the use of oral contraceptives can also increase the risk of DVT.

If you are predisposed to any of the above in-flight risks, especially the swelling of your legs and feet, you might want to consider booking an aisle seat to give you a little more room to move and enable you to get up and walk around at anytime without disturbing your fellow passengers.