230
Participants
Start Date
August 31, 2022
Primary Completion Date
December 21, 2022
Study Completion Date
December 21, 2022
Tuohy needle group
Ultrasound-guided caudal epidural block with Touhy needle
Quincke needle group
Ultrasound-guided caudal epidural block with Quincke needle
GangnamSeverance Hospital, Seoul
Gangnam Severance Hospital
OTHER