K Kamiutsuri1, A Tsujikawa2, S Kobayashi2. 1. Department of Anesthesiology, Rinku General Medical Center, Izumisano, Osaka, Japan. Electronic address: k-kamiutsuri@rgmc.izumisano.osaka.jp. 2. Department of Anesthesiology, Rinku General Medical Center, Izumisano, Osaka, Japan.