结果：面神经阻滞进针的深度：乳突尖至茎乳孔的距离，男性左侧为16。
Result: The needle inserted depths from mastoid into stylomastoid foramen for males and females were 16.
摘要： 患者麻醉满意后，暴露左侧颈动脉鞘，它一般沿胸锁乳突肌的前缘延伸。
Introduction: After administering appropriate anesthesia to the patient, expose the left carotid sheath as it extends along the anterior border of the sternocleidomastoid muscle.
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