 Investigators will evaluate the postoperative edema by measuring the perimeter of thigh. 6 The perimeter will be measured in millimeters at 13 and 23 of the distance lateral condyle of the femur - the greater trochanter. The landmarks will be found by palpation and marked for replication, the data measured using a 150 cm graduated Bohin tape in mm will be performed at the bedside by a student intern in physiotherapy. 