Estimation Formula for Preparation Time of Anesthesia Induction Surgery accounting for Clinical Department Factors in Optimal Surgery Schedule Management

The clinical information (department, anesthesia factor, operation factor) was acquired from the medical records. The time at which the patient entered the operating room, time at which anesthesia was administered, and time at which operation was started were obtained. The anesthesia factors were as follows: type of anesthesia, insertion of epidural catheters, insertion of peripheral venous catheter (1st), insertion of peripheral venous catheter (2nd), insertion of arterial catheter insertion, and insertion of central venous catheter. The surgical factors were use of endoscope, surgery position, use of preoperative mobile biplane X-ray imaging, use of preoperative ultrasound diagnostic device, and use of preoperative surgical navigation systems. To address bias sources, researchers audited the accuracy of data input.