Fig. 4. Graphic illustration of operative and nonoperative time definitions and time intervals described in this report. Nonoperative Time encompasses preoperative and postoperative activities, including room cleanup after the departure of the previous patient, operating room (OR) setup, OR anesthesia time, and emergence from anesthesia. Operative time encompasses those activities (surgical prep and the operation itself) that must occur in the OR. Post = postoperative period. 