Salzman EW, Ploetz J, Bettmann M, Skillman J, Klein L.
Intraoperative external pneumatic calf compression to afford longterm prophylaxis
against deep vein thrombosis in urological patients.
Surgery 1980 Mar;87(3):239-42

In a prospective randomized study of patients undergoing open urological
operations, we found external pneumatic compression (EPC) of the calves applied
in the operating room and recovery room as effective in reducing deep vein
thrombosis as EPC continued during convalescence until resumption of ambulation.
Provided early postoperative ambulation is practiced, intraoperative EPC appears
to be adequate prophylaxis and equivalent to long-term EPC for prevention of deep
venous thrombosis in urological patients.