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"A >5° Trendelenburg position statistically increases RIJV CSA and AP diameter" Garcia-Leal et al (2021).

Trendelenburg position for jugular vein catheterization

Extract:

“To determine the effect of Trendelenburg position on the diameter or cross-section area of the internal jugular vein (IJV) a systematic review and metanalysis was performed. Studies that evaluated the cross-sectional area (CSA) and anteroposterior (AP) diameter of the right internal jugular vein (RIJV) with ultrasonography in supine and any degree of head-down tilt (Trendelenburg position) were analyzed. A total of 22 articles (613 study subjects) were included. A >5° Trendelenburg position statistically increases RIJV CSA and AP diameter. Further inclination from 10° does not statistically benefit IJV size. This position should be recommended for CVC placement, when patient conditions allow it, and US-guided cannulation is not available.”

Reference:

Garcia-Leal M, Guzman-Lopez S, Verdines-Perez AM, de Leon-Gutierrez H, Fernandez-Rodarte BA, Alvarez-Villalobos NA, Martinez-Garza JH, Quiroga-Garza A, Elizondo-Omaña RE. Trendelenburg position for internal jugular vein catheterization: A systematic review and meta-analysis. J Vasc Access. 2021 Jul 13:11297298211031339. doi: 10.1177/11297298211031339. Epub ahead of print. PMID: 34254560.