At the conclusion of surgery a large obaque dressing will be applied from the femoral crease to the mid thigh region so that the catheter location will be concealed. Both catheters will be connected to a pump that will infuse local anesthetic. Ropivicaine 0.2% at 8 ml/hour. There is usually a period of time before the patient transport to the operating room during which the investigators will be able to evaluate if the block is effective and sufficient for surgery.