In 41 healthy volunteers, we investigated the cross-sectional area (CSA) of the subclavian vein (SCV) in the following head positions: neutral and 30° head rotation toward the contralateral or ipsilateral sides. Significant differences were observed in the CSA of the SCV at 3 different head positions: contralateral 30° versus neutral, -0.05 cm2 (95% confidence interval, -0.08 to -0.03); contralateral 30° versus ipsilateral 30°, -0.15 cm2 (-0.19 to -0.12); neutral versus ipsilateral 30°, -0.10 cm2 (-0.13 to -0.07); all Pcorrected < .001). For SCV catheterization, 30° head rotation to the ipsilateral side provided significant improvements in the CSA compared with the other head positions.
From the *Department of Anesthesiology and Pain Medicine, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea; and †Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
Accepted for publication July 27, 2017.
The authors declare no conflicts of interest.
This study was conducted with written informed consent from the study subjects.
Clinical trial registration: The study was registered before patient enrollment. Registry URL: https://clinicaltrials.gov/show/NCT02860351.
ClinicalTrials.gov (trial ID: NCT02860351).
Institutional review board contact information: The Institutional Review Board of SMG-SNU Boramae Medical Center. Approved institutional review board number of this study: 20160616/16-2016-71/071.
Reprints will not be available from the authors.
Address correspondence to Jin-Young Hwang, MD, PhD, Department of Anesthesiology and Pain Medicine, SMG-SNU Boramae Medical Center, Boramae-ro, Dongjak-gu, Seoul 156-707, Republic of Korea. Address e-mail to firstname.lastname@example.org.