Bailong Hu1, Haiyan Zhou2, Yansong Li3. 1. Department of Anesthesiology, The Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China. 375896605@qq.com. 2. Department of Clinical Research Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China. 3. Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, 610041, China.