Thrombo-Embolic Deterrent Hose (T.E.D) or anti-embolism stockings 10-20mmHg (ideally 18mmHg at the ankle, 14mmHg at the calf) – for use by the non-ambulatory (bed or wheelchair confined) user to prevent clotting and embolism (vein obstruction). Teds are of little therapeutic value to the ambulatory (active) user.