 Then a primary closure of the wound is performed capsule, fascia, subcutaneous tissue and skin in both groups. A close drainage Drenovac, NEdren S de R.L. de C.V. is left intraarticular and fixed to the skin. The drainage will be clamped for 2 hours and removed at the 48 hours of the surgery. Thromboprophylaxis low weight heparin will be initiated after 6 hours of the end of the surgery. In the postoperative follow up, any patient with hemoglobin levels less than 9mgdl with anemic syndrome will be transfused. 