Hi,
Your mother is having DVT and flying increases the risk of dislodgement of thrombus,and flying is not advised in such a situation.
If she has to fly in some kind of extreme situation which cannot be avoided then follow the following precautions
1) Keep her limb moving continuously,although not too much
2) If the flight is too long,heparin injection might be recommended ( depending on her tests - PT, APTT )
3) Blood thinners might be given
4) Straighten up legs and bend legs; ta ...
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