144
Participants
Start Date
September 18, 2018
Primary Completion Date
September 30, 2019
Study Completion Date
November 30, 2019
ropivacaine
To perform scalp nerve blocks with ropivacaine
saline
To perform scalp nerve blocks with saline
Renji Hospital affliated to Shanghai Jiaotong University School of Medicine, Shanghai
RenJi Hospital
OTHER