311
Participants
Start Date
May 1, 2019
Primary Completion Date
July 31, 2019
Study Completion Date
August 31, 2019
Simethicone administration 20-30 min before the procedure
Patients intake simethicone 20-30 min before the procedure
Simethicone administration 31-60 min before the procedure
Patients intake simethicone administration 31-60 min before the procedure.
Simethicone administration > 60 min before the procedure
Patients intake simethicone administration \> 60 min before the procedure.
PLA General Hospital, Beijing
Affiliated Hospital to Academy of Military Medical Sciences
OTHER