title: Guidewire advancement is interrupted by an internal jugular vein valve with a restricted opening: an ultrasound image.
authors.affiliation: Department of Anesthesiology, Okinawa Prefectural Nanbu Medical Center & Children's Medical Center, Okinawa, Japan, rover2727@yahoo.co.jp.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Tadokoro
authors.forename: Kouji
authors.initials: K
authors.lastname: Yoza
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Sugahara
mesh_terms: D000368:Aged; D001021:Aortic Valve / Q000473:pathology / Q000601:surgery; D002405:Catheterization, Central Venous / Q000379:methods*; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006801:Humans; D007601:Jugular Veins / Q000000981:diagnostic imaging*; D008297:Male; D018084:Ultrasonography, Interventional / Q000379:methods; D055422:Venous Valves / Q000000981:diagnostic imaging