Panosian M S, Wayman J W, Dutcher P O
Division of Otolaryngology, University of Rochester (NY) School of Medicine and Dentistry 14642-8629.
Arch Otolaryngol Head Neck Surg. 1993 May;119(5):548-50. doi: 10.1001/archotol.1993.01880170072015.
Transtympanic facial nerve paralysis resulting from a penetrating injury through the external auditory canal is a rare occurrence. The common mechanism of paralysis is direct fracture or penetration of the fallopian canal. Slag injuries of the ear caused by hot sparks or molten metal are well known to otolaryngologists because they often result in chronic tympanic membrane perforations and chronic otorrhea. We have encountered two unusual cases of transtympanic slag injury to the ear that resulted in facial nerve injury. In one patient, a significant inner ear injury also occurred. A pathophysiologic mechanism of thermal injury is proposed, and the use of ear protection in welders is discussed.
经外耳道穿透伤导致的经鼓室面神经麻痹是一种罕见的情况。麻痹的常见机制是面神经管的直接骨折或穿透。热火花或熔融金属引起的耳部熔渣伤为耳鼻喉科医生所熟知，因为它们常导致慢性鼓膜穿孔和慢性耳漏。我们遇到了两例不寻常的经鼓室耳部熔渣伤导致面神经损伤的病例。其中一名患者还发生了严重的内耳损伤。本文提出了热损伤的病理生理机制，并讨论了焊工使用耳部防护装置的问题。
