Electrical stimulation of the calf.
D004599:Electric Stimulation Therapy / Q000379:methods*; D006801:Humans; D011183:Postoperative Complications / Q000517:prevention & control; D011655:Pulmonary Embolism / Q000517:prevention & control*; D012907:Smoking; D013924:Thrombophlebitis / Q000517:prevention & control*