150
Participants
Start Date
February 6, 2017
Primary Completion Date
December 20, 2017
Study Completion Date
December 30, 2017
Normal saline
Normal saline is intravenously administrated before anesthesia induction
Remifentanil
Remifentanil is intravenously administrated
Sufentanil
Sufentanil is intravenously administrated
Dexmedetomidine injection
Dexmedetomidine is intravenously administrated before anesthesia induction
Nalmefene
Nalmefene is intravenously administrated before anesthesia induction
Tianjin Medical University General Hospital, Tianjin
Tianjin Medical University General Hospital
OTHER