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Effect of the lateral tilt position on femoral vein cross-sectional area in anesthetized adults
Anesth Pain Med 2019;14(1):106-11
Published online January 31, 2019
© 2019 Korean Society of Neuroscience in Anesthesiology and Critical Care.

Tae Hun An1 , Yu Som Shin2 , Joo Won Kim2 , Tae Woo Park2 , Dong Jin Shim2 , Doo Sik Kim2 , Sie Jeong Ryu2 , and Ju Deok Kim2
Department of Anesthesiology and Pain Medicine, 1Chosun University School of Medicine, Gwangju, 2Kosin University College of Medicine, Busan, Korea
Correspondence to: Ju Deok Kim, M.D., Ph.D. Department of Anesthesiology and Pain Medicine, Kosin University College of Medicine, 262 Gamcheon-ro, Seo-gu, Busan 49267, Korea Tel: 82-51-990-6283 Fax: 82-51-254-2504 E-mail: ORCID
Received May 14, 2018; Revised July 5, 2018; Accepted July 11, 2018.
cc This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Background: A lateral tilt position can affect the size of the femoral vein (FV) due to increased venous blood volume in the dependent side of the body.
Methods: Forty-two patients, aged 20–60 years, were enrolled in this study. The cross-sectional area (CSA), anteroposterior, and transverse diameters of the FV were measured 1 cm below the left inguinal line using ultrasound. The value of each parameter was recorded in the following four positions: (1) supine, (2) supine + 10° left-lateral tilt (LLT), (3) 10° reverse Trendelenburg (RT), and (4) RT + LLT.
Results: CSAs of the left FV in the supine, supine + LLT, RT, RT + LLT positions were 0.93 ± 0.22, 1.11 ± 0.29, 1.17 ± 0.29, and 1.31 ± 0.32 cm2, respectively. Compared to the supine position, there was a significant increase in CSA and anteroposterior diameter according to the three changed positions. The transverse diameter of the left FV was significantly increased in supine + LLT, RT, RT + LLT positions compared to that in the supine position (P = 0.010, P = 0.043, P = 0.001, respectively). There was no significant difference in the transverse diameter of the left FV between the supine + LLT and RT positions (P = 1.000).
Conclusions: Adding LLT to the supine and RT positions increased the CSA of the unilateral FV significantly.
Key Words : Catheterization; Femoral vein; Posture; Ultrasonography.

January 2019, 14 (1)
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