title: The effect of blowing a whistle on the cross-sectional area of the internal jugular vein.
authors: Yinzhou People's Hospital, Ningbo, Zhejiang, China. renqiusheng1971@yahoo.com.
authors: Q S
authors: QS
authors: Ren
authors: Yinzhou People's Hospital, Ningbo, Zhejiang, China.
authors: L M
authors: LM
authors: Zhao
authors: Yinzhou People's Hospital, Ningbo, Zhejiang, China.
authors: W J
authors: WJ
authors: Yu
mesh_terms: D045853:Exhalation / Q000502:physiology*; D005260:Female; D006801:Humans; D007601:Jugular Veins / Q000000981:diagnostic imaging* / Q000502:physiology; D008297:Male; D012016:Reference Values; D014463:Ultrasonography; D014636:Valsalva Maneuver / Q000502:physiology