Venography.
D001808:Blood Vessels; D006801:Humans; D007866:Leg / Q000098:blood supply*; D010690:Phlebography; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D011655:Pulmonary Embolism / Q000517:prevention & control; D013924:Thrombophlebitis / Q000000981:diagnostic imaging*