Department of Otorhinolaryngology, Head and Neck Surgery, University of Rostock, Rostock, Germany.
Otol Neurotol. 2010 Feb;31(2):225-7. doi: 10.1097/MAO.0b013e3181cc07fd.
To describe a new technique in surgical treatment of obliterative tympanosclerosis by applying a floating mass transducer (FMT) to a third window.
A 64-year-old woman with a severe combined hearing loss due to tympanosclerosis received a third window vibroplasty.
A mastoidectomy and a posterior tympanotomy via the large facial recess were performed. The promontory was exposed by a transcanal approach. The third window was performed anterior inferior to the round window. The membranous cochlea was left intact. The FMT was gently pushed into the perichondrium-coated cochlear window. All other surgical steps were the same as in conventional FMT application.
Preliminary data of this report reveal that vibroplasty with coupling of the FMT directly to a third window leads to similar audiological results compared with the conventional coupling of the FMT on the round window niche.
The presented case demonstrates the applicability of a third window vibroplasty in obliterative tympanosclerosis. Further studies will show if our assumption of a reduced risk for inner ear trauma is justified or not.
通过在第三窗口应用浮动质量换能器（FMT）来描述一种治疗闭塞性鼓室硬化症的新手术技术。
一名 64 岁女性，因鼓室硬化症导致严重混合性听力损失，接受了第三窗口声触媒术。
进行乳突切除术和通过大面隐窝的后鼓室切开术。通过经耳道入路暴露圆窗突。在圆窗下方前下方向进行第三窗口手术。保留完整的膜迷路。将 FMT 轻轻推入带软骨膜的耳蜗窗。所有其他手术步骤与传统 FMT 应用相同。
本报告的初步数据表明，与传统的 FMT 在圆窗龛耦合相比，将 FMT 直接耦合到第三窗口的声触媒术可获得相似的听力结果。
所提出的病例证明了第三窗口声触媒术在闭塞性鼓室硬化症中的适用性。进一步的研究将表明我们假设内耳创伤风险降低是否合理。
