Postoperative care and rehabilitation
Physiotherapy was performed as soon as the patient returned to the ward, the same day of surgery. The vacuum drain was removed at a maximum of 24 h after surgery. ROM and straight-leg raising exercises were performed continuously during the first day in the ward. A continuous passive motion device was also used. Isometric quadriceps strengthening exercises and assisted weightbearing ambulation using a walker were performed on the second day. Antithrombotic prophylaxis using an oral direct-factor Xa inhibitor (rivaroxaban) was administered to all patients for 14 days postoperatively. The postoperative care and rehabilitation were identical for both knees.