Barker Emma, Trimble Keith, Chan Harley, Ramsden James, Nithiananthan Sajendra, James Adrian, Bachar Gideon, Daly Mike, Irish Jonathan, Siewerdsen Jeff
Departments of Otolaryngology-Head and Neck Surgery and Surgical Oncology, Princess Margaret Hospital, University of Toronto, Toronto, Ontario, Canada.
Otolaryngol Head Neck Surg. 2009 May;140(5):697-702. doi: 10.1016/j.otohns.2008.12.046.
To describe a cadaveric temporal bone model of labyrinthitis ossificans and investigate the utility of intraoperative cone-beam computed tomography (CBCT) in the facilitating cochlear implantation.
Cadaveric temporal bone study.
Five cadaveric heads had cement introduced into the 10 cochleas. CBCT and a conventional CT scan were compared to assess the extent of cochlear obliteration. The cement was drilled-out (under CBCT guidance, if required) and cochlear implant electrode arrays (from 3 different manufacturers) inserted.
CBCT images demonstrated temporal bone anatomy and the extent of cochlear obliteration as clearly as conventional CT in all cases. Intraoperative CBCT guided drilling and facilitated electrode placement in two of five heads (3 of 10 ears). Streak-artifact from the electrodes of two devices partially obscured image clarity.
The obliterated cochlear model reproduced a disease-ossified cochlear both radiographically and surgically. CBCT is useful for intraoperative imaging to facilitate electrode array placement in the obliterated or congenitally abnormal cochlea.
描述骨化性迷路炎的尸体颞骨模型,并研究术中锥形束计算机断层扫描(CBCT)在辅助人工耳蜗植入中的作用。
尸体颞骨研究。
向5具尸体头部的10个耳蜗内注入骨水泥。比较CBCT和传统CT扫描以评估耳蜗闭塞的程度。钻出骨水泥(必要时在CBCT引导下),并插入人工耳蜗电极阵列(来自3个不同制造商)。
在所有病例中,CBCT图像显示颞骨解剖结构和耳蜗闭塞程度与传统CT一样清晰。术中CBCT引导钻孔并辅助在5个头部中的2个(10只耳中的3只)植入电极。两种设备电极产生的条纹伪影部分模糊了图像清晰度。
闭塞性耳蜗模型在影像学和手术方面再现了疾病导致骨化的耳蜗。CBCT有助于术中成像,以辅助在闭塞性或先天性异常耳蜗中放置电极阵列。