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Deep vein thrombosis
A deep vein thrombosis (DVT) is a blood clot located in a deep vein, usually in the legs.
A DVT is usually caused by a combination of different factors. One of these factors is a period of reduced activity, for example an aeroplane or car journey longer than four hours. The longer the flight or journey, the greater the risk. A DVT usually occurs shortly after the journey, but the risk remains elevated up to eight weeks after the journey.
DVT occurs mainly in people with pre-existing risk factors, such as:
- obesity (BMI > 30)
- a previous thrombosis
- pregnancy
- active cancer
Prevention
Prevention during a flight of 4 hours or more.
Clothing
Wear loose, comfortable clothing.
Getting up
Ask for an aisle seat so that you can get up easily.
Leg room
Ensure that you have enough space in the area under the seat in front of you, so that you can move your feet.
Position
Change position regularly.
Exercises
Perform exercises for your legs and feet several times per hour.
Walk around
Get up regularly and walk around.
Increased risk?
If you have any of the risk factors for DVT, discuss with your doctor whether the following additional measures are necessary:
- Support stockings up to the knee.
- An anticoagulant injection two to six hours before the flight or an oral anticoagulant (NOAC).
- Acetylsalicylic acid (aspirin) does not help in this context.
In case of symptoms
Seek medical advice if you suffer any symptoms. A DVT should be treated as soon as possible. The clot can detach and move with the blood to the lungs (pulmonary embolism).
Additional information for doctors
