How do you prevent blood clots on long haul flights?

Prevent Blood Clots During Travel
  1. Stand up or walk occasionally. ...
  2. Exercise your calf muscles and stretch your legs while you're sitting. ...
  3. Talk to your doctor about wearing compression stockings or taking medicine before departure if you have additional risk factors for blood clots.




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Even if you travel a long distance, the risk of developing a blood clot is generally very small. Your level of risk depends on the duration of travel as well as whether you have any other risks for blood clots.

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Blood clots affect about 1-2 in 1,000 U.S. adults per year, and the risk may double or triple after a flight that's 4+ hours. One study estimates that 1 in 4,600 travelers will have a blood clot within 4 weeks of a long flight.

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Your GP will not be able to advise on the use of anticoagulants for flying as it is a specialist issue, so allow plenty of time to get an opinion from your specialist. Note: aspirin is not used to prevent DVT.

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Bajakian recommends you talk to your doctor before taking a flight longer than 4 to 6 hours. In some extremely high-risk cases, she may prescribe a course of low-dose anticoagulation medication for travel.

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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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After the flight If you have travelled by air you should be alert for the symptoms of DVT for up to one month after flying, and should seek medical help if any symptoms such as a swollen or painful leg, especially the calf, and/or breathing difficulties occur.

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Tips for improving blood circulation on a plane
  1. Wear compression socks. Compression socks work wonders on the plane! ...
  2. Keep hydrated. Staying hydrated is essential for keeping your blood circulation in top shape, especially during a flight. ...
  3. Wear loose clothing. ...
  4. Choose a seat with additional legroom. ...
  5. Improve your fitness.


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Over-the-counter medicines
  • Diarrhea medicine (Imodium or Pepto-Bismol)
  • Antacid.
  • Antihistamine.
  • Motion sickness medicine.
  • Cough drops, cough suppressant, or expectorant.
  • Decongestant.
  • Pain and fever medicine (acetaminophen, aspirin, or ibuprofen)
  • Mild laxative.


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