(Please read the Disclaimer before using the ABC Guide to Travel Health).
Deep vein thrombosis (DVT) is the formation of a blood clot (thrombus)
usually in the deep veins of the legs. Circulatory stasis from prolonged
sitting is the main factor in the development of DVT. In the case of air
travel, it has been suggested, but not proven, that other factors, such
as the seat position, lower humidity and oxygen levels, alcohol consumption
and inadequate fluid intake, may increase the tendency for blood clots to
form. 11-13
Risk for travellers 11-13
The increased risk associated with travel is probably very small unless
additional pre-existing risk factors for DVT are present. (See your doctor.)
Precautions and prevention 11-13
For anyone travelling for prolonged periods, especially for trips longer
than 6 –8 hours:
Wear loose non-restrictive clothing.
Do not sit with the legs crossed.
Move around in the seat and cabin
as much as is practicable.
While seated, do calf exercises to stimulate
blood flow, like flexing the ankles.
Drink plenty of fluids before
and during the trip.
Avoid excessive intake of alcohol and caffeine drinks during the trip.
It
may be helpful to wear graduated-compression stockings designed for
travel, especially for those with risk factors
for DVT. (See your doctor.)
Low-dose aspirin may be used by travellers, but
only in accordance with medical advice. (See you doctor.)
Be watchful
for symptoms of DVT, in particular pain in the calves, during and
for up to a month after a long flight.
See you doctor if symptoms develop.
