164
Participants
Start Date
April 1, 2018
Primary Completion Date
December 15, 2019
Study Completion Date
December 15, 2019
needle (Chiba)
intravascular injection using chiba needle during caudal epidural block
needle (Whitacre)
intravascular injection using whitacre needle during caudal epidural block
Kyungpook National University Hospital, Daegu
Kyungpook National University Hospital
OTHER