title: A needle guide can facilitate visualization of needle passage in ultrasound-guided nerve blocks.
authors.forename: Ai-Zhong
authors.initials: AZ
authors.lastname: Wang
authors.forename: Wei-Xing
authors.initials: WX
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Jiang
mesh_terms: D001917:Brachial Plexus / Q000000981:diagnostic imaging; D004867:Equipment Design; D006801:Humans; D009339:Needles; D009407:Nerve Block / Q000379:methods*; D018084:Ultrasonography, Interventional / Q000379:methods*; D034941:Upper Extremity / Q000601:surgery