Using pressure therapy to help lower-limb venous return is the most common method used by specialists, which is the principle of airline airplane socks. The airline socks are very elastic and can pressurize the legs from the outside. This kind of airplane stockings contains elastic rubber. It passes through different pressure gradients from the ankle to the thigh (the ankle pressure is the tightest and the pressure decreases along the leg, and the high pressure is the smallest and the loosest).
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