108
Participants
Start Date
July 1, 2017
Primary Completion Date
April 30, 2018
Study Completion Date
April 30, 2018
Fasting 2 h after clear liquid or 6h after a light meal
The fasting time for all patients is 2 h after clear liquid or 6h after a light meal, then gastric ultrasound examination is performed.
West China Hospital, Chengdu
West China Hospital
OTHER