195
Participants
Start Date
January 1, 2019
Primary Completion Date
October 21, 2019
Study Completion Date
December 31, 2019
normal saline
a bolus of normal saline was given followed by normal saline infusion
Norepinephrine
a bolus of norepinephrine was given followed by norepinephrine infusion
General Hospital of Ningxia Medical University, Yinchuan
General Hospital of Ningxia Medical University
OTHER