This prospective, observational volunteer study aimed to describe the appearance of the great auricular nerve using ultrasound and its blockade under ultrasound guidance. An in-plane needle guidance technique was used for blockade of the great auricular nerve with 0.1 ml mepivacaine 1%. Sensory block was evaluated by pinprick testing in comparison with the contralateral area propriae. The great auricular nerve was successfully seen in all volunteers and the tail of the helix, antitragus, lobula and mandibular angle were blocked in all cases whereas the antihelix and concha were never blocked. Ultrasound imaging of the great auricular nerve can be reliably achieved and successful blockade with minimal volumes of local anaesthetic is another example of the benefits of ultrasound-guided peripheral nerve blocks.
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机译：这项前瞻性，观察性志愿者研究旨在利用超声及其在超声引导下的阻滞描述耳大神经的外观。使用平面针头引导技术以0.1 ml 1％的甲哌卡因阻断大耳神经。通过针刺试验与对侧面积固有物进行比较来评估感觉阻滞。在所有志愿者中都成功地看到了耳大神经，并且在所有情况下，螺旋的尾巴，防耳屏，小叶和下颌角均被阻塞，而反螺旋和外耳从未被阻塞。可以可靠地实现耳大神经的超声成像，并且用最小量的局麻药进行成功的阻滞是超声引导的周围神经阻滞好处的另一个例子。
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