Yuichi Ohgoshi1, Kentaro Ino2, Masakazu Matsukawa2. 1. Department of Anesthesiology, International University of Health and Welfare Mita Hospital, 1-4-3 Mita, Minato-ku, Tokyo, 108-8329, Japan. ohgoshi22@gmail.com. 2. Department of Anesthesiology, International University of Health and Welfare Mita Hospital, 1-4-3 Mita, Minato-ku, Tokyo, 108-8329, Japan.