Are pilots prone to blood clots?

Background: Airline pilots may be at increased risk of venous thromboembolism (VTE) because air travel has recently been established as a risk factor for VTE. Objectives: The aim of this study was to assess the risk of VTE in a cohort of Dutch airline pilots.



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Increasing leg muscle activity during long periods of sitting improves blood flow in the legs. This may include walk- ing around the cabin or exercising your lower legs and ankles while seated. Drinking adequate fluids, and avoiding alcohol and caffeine, may also help by preventing dehydration.

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One study estimates that 1 in 4,600 travelers will have a blood clot within 4 weeks of a long flight. According to Dr. Kahn, “the actual risk of a travel-related blood clot is quite small, and the average traveler doesn't need to worry about it.

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DVT or PE may manifest during or shortly after the flight, but often not for several weeks. Prevention includes choosing aisle seating, maintaining hydration, walking frequently, wearing loose clothing, exercising the lower extremities, using a foot rest, and avoiding alcohol and sleeping pills.

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There has been considerable attention focused recently on the risk of deep venous thrombosis (DVT) associated with air travel. Despite the lack of evidence among air travelers, a single dose of aspirin has been widely recommended as a means of preventing such thrombosis.

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Being a pilot is not without its risks. Pilots must be aware of the physical and mental strain, the danger of accidents, the risk of job loss, and the potential for legal action. With the proper training and preparation, pilots can minimize these risks and ensure their safety and success in the air.

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The FAA accepts most anticoagulants including aspirin, Coumadin (warfarin), Pradaxa (dabigatran), Xarelto (rivaroxaban), or Eliquis (apixaban). Coumadin has been around a long time, and is a somewhat difficult drug to manage for several reasons.

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Deep vein thrombosis (DVT) or Traveler's Thrombosis occurs when blood in a vein (most often in lower extremities) becomes stagnant and then forms clot. If you think about it, the pilots are at less risk compared to passengers in this matter.

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If symptoms do occur they can include:
  • pain, swelling and tenderness in one of your legs (usually your calf or thigh)
  • a heavy ache in the affected area.
  • warm skin in the area of the clot.
  • red skin, particularly at the back of your leg below the knee.


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Compression socks come in many different levels of compression but for flying, socks with 8-20 mmHg are going to be your best bet. Many socks will fall in between this range like 8-15 mmHg, 12-14 mmHg or 15-20 mmhg. Compression levels over 20 mmHg are best worn when prescribed by a doctor.

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