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Abstract
Background
Canalplasty is important in microscopic ear surgery, but it has rarely been studied in otoendoscopic surgery.
Objectives
The aim of this study was to investigate the application of canalplasty due to external auditory canal stenosis caused by bony bulges in endoscopic myringoplasty.
Materials and methods
The procedures and effects of canalplasties and myringoplasties were analysed. During the canalplasties, depending on the location of the bulges, the meatal skin flaps were elevated in different manners, and the underwater bone drilling technique was adopted to remove the bulges to enlarge the osseous canals.
Results
Canalplasties were performed in 18.5% (33/178) of myringoplasties. All surgeries were completed exclusively via the transcanal endoscopic approach. No iatrogenic injuries were found. Most of the canalplasties required drilling off bulges on multiple walls. The mean total duration of the canalplasties and myringoplasties was 76.6 ± 4.5 min, and the proportion of time required for the canalplasties was 47.3 ± 2.4%.
Conclusion
Only approximately one in five endoscopic myringoplasties require antecedent canalplasties due to concurrent canal stenosis. With the underwater bone drilling technique, transcanal endoscopic canalplasty can be safely and efficiently conducted.
Chinese Abstract
背景：耳道成形术在耳显微手术中很重要, 但在耳内镜手术中, 它还很少得到研究。
目的：本研究的目的是探讨由于骨质隆起引起的外耳道狭窄而进行的内镜鼓膜成形术中耳道成形术的运用。
材料与方法：分析了耳道成形术和鼓膜成形术的过程和效果。在耳道成形术中, 根据隆起的位置, 采用不同方式抬高肉质皮瓣, 采用水下骨钻技术去除隆起, 扩大骨质耳道。
结果：在18.5% (33/178) 的鼓膜成形术中进行了耳道成形术。所有手术均完全通过经耳道内窥镜方法完成。未发现医源性损伤。大多数耳道成形术需要在多个耳道壁上钻掉隆起。耳道成形术和鼓膜成形术的平均总持续时间为 76.6 ± 4.5 分钟, 耳道成形术所需时间比为 47.3 ± 2.4%。
结论：由于并发耳道狭窄, 只有大约五分之一的内窥镜鼓膜成形术需要先行耳道成形术。借助水下骨钻技术, 可以安全有效地进行经耳道内镜下耳道成形术。
Disclosure statement
No potential conflict of interest was reported by the author(s).