Who is at Risk from DVT?
Some people are more susceptible to deep vein thrombosis (DVT) than others. In general, the risk of DVT increases for those aged over 40. Less than 1 person in 3,000 aged under 40 becomes affected by DVT; this rises to 1 person in 500 over the age of 80. The people who fall into the high-risk category for developing DVT include:
- Those who have (or have had) medical conditions such as heart or circulation problems or blood diseases
- Anyone who has suffered previous thrombotic episodes (especially pulmonary embolism)
- Anyone who has undergone recent medical surgery or treatment (especially lower limbs, and in particular the hips or knees)
- Anyone who has suffered a stroke
- Anyone who has congestive heart failure
- Pregnant women (or those who have recently given birth)
- Women who are on hormonal medication (including the oral contraceptive pill and oestrogen) containing hormone replacement therapy
- Anyone over 40 years of age
- Anyone who is reasonably tall or short (due to their seating positions)
- Anyone who has a prior history or is currently suffering from malignant disease e.g. cancer
- Anyone who is dehydrated
Research has also suggested that obesity, smoking and varicose veins can also compound susceptibility to DVT. However, it should also be noted that people who do not fit the above criteria may also develop DVT, although their chances of doing so are much slimmer.
DVT becomes more of a risk factor if you experience:
- A cramped position for the duration of the flight.
- Compression of the popliteal vein by the edge of the seat.
- Extended periods of immobility.
- Dehydration as a result of alcohol intake.
Travelers at greatest risk are those who fail to move about and exercise. One sign to watch out for is swollen feet or ankles, caused by poor circulation, and made worse by the low air pressure in the aircraft cabin. While having swollen ankles or feet does not necessarily indicate the onset of DVT, it does show that you may have poor circulation, and you should therefore take every step possible to minimize the risk of DVT.
However, as long as you take reasonable precautions and exercise every so often, you needn't let the worry of DVT to put uou off from flying. If you have any concerns or doubt, consult your local doctor or travel clinic for expert advice.