Ukatu Ceisha Chinwe, Desai Nilesh Kundanlal, Todd Norman Wendell
Emory University School of Medicine, Atlanta, Georgia.
Department of Radiology and Imaging Sciences, Emory University Children's Healthcare of Atlanta, Atlanta, Georgia.
Otolaryngol Head Neck Surg. 2015 Feb;152(2):348-52. doi: 10.1177/0194599814562753. Epub 2014 Dec 22.
To describe in children younger than the present US FDA-approved 5 years of age the thickest part of the temporal bone available for placement of a bone-anchored hearing system. Children with unilateral hearing loss, as with aural atresia, have deficits in at least language comprehension and oral expression. The early provision of hearing to the atretic ear may minimize the potential for auditory deprivation.
Point prevalence descriptive study.
Tertiary referral pediatric hospital.
Thirty-eight patients less than 6 years old with congenital aural atresia had undergone temporal bone computed tomography (CT). Bone thickness lateral (ie, superficial) to the sinodural angle, in the topmost axial CT slice that included any adjacent petrous ridge, was measured.
The mean bone thicknesses lateral to the sinodural angles of the atretic ears were 5.1, 5.0, 5.9, 5.2, 5.2, and 4.8 mm for the <1, 1-, 2-, 3-, 4-, 5-year-olds, respectively; of the non-atretic ears, thicknesses were 4.1, 4.9, 5.5, 6.7, 4.3, and 4.7 mm.
Based on this small case series, bone thickness lateral (ie, superficial) to the sinodural angle is sufficient for many children suffering from aural atresia to have bone-anchored hearing devices implanted younger than age 5 years. Use of the sinodural site would require a magnetic bone-anchored hearing system, which could be repositioned posteriorly at age 5 years when pinna construction and atresiaplasty endeavors typically begin.
描述在美国食品药品监督管理局（FDA）目前批准的5岁以下儿童中，可用于植入骨锚式听力系统的颞骨最厚部分。患有单侧听力损失（如耳道闭锁）的儿童至少在语言理解和口语表达方面存在缺陷。尽早为闭锁耳提供听力可能会将听觉剥夺的可能性降至最低。
现患率描述性研究。
三级转诊儿科医院。
38例6岁以下先天性耳道闭锁患者接受了颞骨计算机断层扫描（CT）。在包含任何相邻岩嵴的最顶层轴向CT切片中，测量窦硬膜角外侧（即表面）的骨厚度。
闭锁耳窦硬膜角外侧的平均骨厚度，1岁以下、1岁、2岁、3岁、4岁、5岁儿童分别为5.1、5.0、5.9、5.2、5.2和4.8毫米；非闭锁耳的厚度分别为4.1、4.9、5.5、6.7、4.3和4.7毫米。
基于这个小病例系列，窦硬膜角外侧（即表面）的骨厚度足以让许多患有耳道闭锁的儿童在5岁之前植入骨锚式听力装置（BAHD）。使用窦硬膜部位需要一个磁性骨锚式听力系统，当耳廓构建和耳道成形术通常开始的5岁时，该系统可重新定位到后方。
