100
Participants
Start Date
July 31, 2011
Primary Completion Date
December 31, 2012
Study Completion Date
December 31, 2012
Head rotation
Repeated ultrasonographic examination according to the degree of head rotation (examination of overlap index of internal jugular vein and common carotid artery, and accuracy of external landmark of jugular cannulation)
Samsung Medical Center, Seoul
Samsung Medical Center
OTHER