146
Participants
Start Date
March 11, 2019
Primary Completion Date
December 9, 2019
Study Completion Date
December 9, 2019
Dynamic needle tip positioning under ultrasound-guidance
The tip of needle is positioned under ultrasound-guidance using dynamic short-axis view.
Conventional long-axis view
The tip of needle is positioned under ultrasound-guidance using conventional long-axis in-plane view.
Seoul National University Hospital, Seoul
SMG-SNU Boramae Medical Center
OTHER
Seoul National University Hospital
OTHER