293568.fig.002a
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293568.fig.002b
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293568.fig.002c
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Figure 2: Sonography of left the internal jugular vein before the surgical procedure, mouth closed. (a) transverse imaging; (b) longitudinal imaging; (c) normal anatomical relationships (another patient) omohyoid muscle is adjacent to the internal jugular vein but is not compressing it. IJV: internal jugular vein, CA: carotid artery, SCM: sternocleidomastoid muscle, OH: omohyoid muscle.