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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
1Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea,
2Department of Anesthesiology and Pain Medicine, Kosin University College of Medicine, Busan, Korea
Correspondence to: Corresponding author 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:
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.


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.


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.


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).


Adding LLT to the supine and RT positions increased the CSA of the unilateral FV significantly.

Key Words : Catheterization, Femoral vein, Posture, Ultrasonography

July 2019, 14 (3)
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