193
Participants
Start Date
July 1, 2020
Primary Completion Date
March 27, 2021
Study Completion Date
March 27, 2021
Control group
No preload was given before spinal anesthesia.
4 ml/kg group.
4 ml/kg compound sodium chloride (0.85% NaCl, 0.03% KCl, and 0.033% CaCl2) was given before spinal anesthesia.
8 ml/kg group.
8 ml/kg compound sodium chloride (0.85% NaCl, 0.03% KCl, and 0.033% CaCl2) was given before spinal anesthesia.
12 ml/kg group.
12 ml/kg compound sodium chloride (0.85% NaCl, 0.03% KCl, and 0.033% CaCl2) was given before spinal anesthesia.
General Hospital of Ningxia Medical University, Yinchuan
General Hospital of Ningxia Medical University
OTHER