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首页> 外文期刊>Anatomia Histologia Embryologia >Anatomy and anaesthesia of the equine external ear canal.
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Anatomy and anaesthesia of the equine external ear canal.

机译：马外耳道的解剖和麻醉。

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摘要

Anaesthesia of the external ear canal (external acoustic meatus) is usually performed by blocking both the great and internal auricular nerves by regional infiltration. However, exact landmarks for blocking the internal auricular nerve to accomplish effective anaesthesia have not been described yet. In this study, detailed anatomical dissection of the equine external ear canal and its nerve supply was carried out on fifteen cadaver heads. Tissue samples of the dissected nerves were taken from two cadaver heads processed and were evaluated microscopically. Prior to the dissection, the region of interest was evaluated ultrasonographically, and injection of a local anaesthetic was simulated with an injection of methylene blue on ten cadaver heads. The tympanic membranes of three cadaver heads were obtained by microdissection and processed for microscopic evaluation. The entrance point of the internal auricular nerve, which is a branch of the facial nerve, into the ear canal is formed by the styloid process of the auricular cartilage. Using ultrasound, the styloid process presented as a thin hyperechoic line 2.17-2.97 cm deep, based on the skin surface. Landmarks for performing a complete and reliable anaesthesia of the external ear canal were established, and the simulated anaesthesia with methylene blue injection was evaluated as successful in all ten cases. Additionally, the histological composition of the equine tympanic membrane is described and illustrated.
机译：外耳道（外耳道）的麻醉通常是通过区域浸润来阻断耳内和大神经。然而，尚未描述用于阻断内耳神经以完成有效麻醉的确切标志。在这项研究中，对十五只尸体头进行了马外耳道及其神经供应的详细解剖解剖。解剖神经的组织样本取自处理过的两个尸首，并在显微镜下进行了评估。在解剖之前，需要超声检查感兴趣的区域，并在十个尸体头上注射亚甲蓝来模拟局部麻醉剂的注射。通过显微解剖获得三个尸体头部的鼓膜，并对其进行处理以进行显微镜评估。耳内神经是面神经的一个分支，进入耳道的入口点是通过耳软骨的茎突形成的。使用超声，茎突过程呈现为基于皮肤表面的2.17-2.97厘米深的高回声细线。建立了对外耳道进行完全可靠麻醉的里程碑，并且在全部十例中，使用亚甲蓝注射进行的模拟麻醉评估为成功。另外，描述和说明了马鼓膜的组织学组成。

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