Most expatriates need to take one if not several long intercontinental flights a year. Only recently, has there developed an awareness of the health hazards associated with these flights. In addition, to greater susceptibility to respiratory infections, jet-lag and motion sickness, there has been a growing concern of the life threatening dangers associated with blood clots developing in the deep veins of the legs. The medical name of this disorder is thrombophlebitis (or deep venous thrombosis). These clots usually begin in the lower calves of the leg, but become dangerous when they extend or develop above the calves. They can cause swelling and pain in the affected leg. Often these clots can be present without symptoms until one breaks off and travels back to the heart and into the lungs. Then these traveling clots are known as pulmonary embolus. A small pulmonary embolus may cause no symptoms. However, a large one will result in sudden shortness of breath, shock and even death.

What can be done to minimize the risk of blood clotting in the legs?

First, whenever possible, fly in less cramp circumstances such as business or first class. These seats provide greater legroom and the ability to lie supine. However, this may not be an economical solution for most travelers.

Get out of your seat, and frequently (at least every couple of hours) walk down the aisles and do leg stretching exercises. Try to get an aisle seat to allow easy access for walking. Exercising the leg muscles allows blood in the veins to flow back to the heart and not stagnate in the lower legs. Also whenever possible elevate the legs or use a footrest (there is more leg room at the emergency exit seats).

Keep hydrated. Drink plenty of fluids and avoid alcohol and caffeine, both, which have mild diuretic properties. Dehydration makes blood more concentrated and hence more apt to clot.

The above measures will help to reduce your chances of developing clots in the legs and the complications associated with them. Finally, if you develop swelling or pain in your legs after a flight, consult your doctor immediately.

Bon voyage and safe flying!!!