Randomized Controlled Trial
The impact of Trendelenburg position and positive end-expiratory pressure on the internal jugular cross-sectional area.
Anesth. Analg. 2010 Aug 1;111(2):432-6.
Randomized Controlled Trial
Abdominal compression effectively increases the size of the common femoral vein, as measured by ultrasonography.
Ann Emerg Med. 2008 Oct 1;52(4):446-52.
Randomized Controlled Trial
Relationship between Trendelenburg tilt and internal jugular vein diameter.
Emerg Med J. 2005 Dec 1;22(12):867-8.