Forte V, Turner A, Liu P
Department of Otolaryngology, University of Toronto, Ontario, Canada.
J Otolaryngol. 1989 Aug;18(5):232-5.
Tinnitus may be defined as the perception of sound in the absence of environmental input. It can be subjective. Objective tinnitus may be caused by clearly definable mechanical or vascular abnormalities, and as such may be amenable to specific management. We report a case of objective tinnitus associated with an abnormal mastoid emissary vein. A review of the literature identified only one other report of objective tinnitus associated with an emissary vein. That report involved a posterior condylar emissary vein. The venous drainage of the sigmoid sinus was studied on 50 human skulls demonstrating three possible emissary veins of each sigmoid sinus. The postauricular region was dopplered on 30 asymptomatic human subjects. None was found to have dopplered emissary vein flow.
耳鸣可定义为在无外界环境声音输入时所感知到的声音。耳鸣可以是主观性的。客观性耳鸣可能由明确可定义的机械性或血管性异常引起，因此可能适合特定的治疗方法。我们报告一例与异常乳突导静脉相关的客观性耳鸣病例。文献回顾仅发现另一例与导静脉相关的客观性耳鸣报告。该报告涉及的是髁后导静脉。对50个成人颅骨进行了乙状窦静脉引流的研究，结果表明每个乙状窦有三条可能的导静脉。对30名无症状的受试者的耳后区域进行了多普勒检查。未发现有导静脉血流的情况。
