- London to New York (7 – 8 hours).
- London to Phoenix, Arizona (11 – 12 hours).
Half of the passengers took no preventative measures against DVT and the other half wore Scholl Flight Socks providing a compression level of 14-17mmHg at the ankle. The study focused only on people classed as low-to-medium risk of DVT and found that:
- more than 4% of those not wearing Flight Socks suffered from some form of thrombosis during the flight to Phoenix.
- more than 3% of those not wearing Flight Socks suffered from some form of thrombosis during the flight to New York.
- The incidence of thrombosis among those wearing Scholl Flight Socks was zero.
The study also found clear evidence that wearing Scholl Flight Socks prevented oedema, which is believed to be a cause of DVT through veins being compressed. The research found that the level of oedema (swelling) in passengers' legs wearing Scholl Flight Socks was approximately three times lower than in those passengers who did not take any preventative measures. For more information about Scholl Flight Socks, visit www.schollflightsocks.co.uk.
- Prandoni P et al. Below-knee elastic compression stockings to prevent post-thrombotic syndrome. A randomised, controlled trial. Ann Intern Med 2004; 141: 249-256.
- Belcaro, G et al. Prevention of edema, flight microangiopathy and venous thrombosis in long flights with elastic stockings. A Randomized Trial. The LONFLIT 4 Concorde Edema-SSL study Angiology 2002; 52(5): 635-645