Deep Vein Thrombosis (DVT) is recognized as the most serious health risk to frequent air passengers although the incidence has not reached any alarming numbers. DVT is a blood clot which often occurs when blood changes its state from liquid to solid and affects the veins (especially the veins of pelvis and legs). Blood clots can be of varying sizes and severity and though small clots may not cause serious problems, medium-sized clots can make moving the affected body part painful and cause swelling.
Large-sized clots however, can prove fatal as these clots have a tendency to break off, travel through the bloodstream, and enter into to the lungs, leading to a medical condition known as pulmonary embolism or Venous ThromboEmbolism (VTE). The symptoms of VTE include chest pain and gasping for breath. In rare cases it may even cause sudden death even before medical help can be provided.
Persistent air travellers, heavy smokers, anyone older than 40, persons regularly taking oral contraceptives, obese individuals, patients recently receiving major surgery – are all more prone to develop blood clots or DVT during air travel.