Osborn Alexander J, Oghalai John S, Vrabec Jeffrey T
Bobby R. Alford Department of Otolaryngology - Head and Neck Surgery, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.
Int J Pediatr Otorhinolaryngol. 2011 Jul;75(7):910-4. doi: 10.1016/j.ijporl.2011.04.004. Epub 2011 May 12.
To examine middle ear volume in patients with aural atresia and investigate the role of middle ear volume as an adjunct measure in determining surgical candidacy.
We performed a retrospective review of children with aural atresia in a tertiary academic pediatric otolaryngology practice. High resolution multiplanar CT scans of the temporal bones were analyzed for middle ear volume and staged according to existing clinical grading scales. Atretic ears were compared to the nonatretic ears of the same patient as well as to ears of a control population.
The average age of patients at the time CT was performed was 4.7 years (range <0.1-13.8 years). The average middle ear volume of the atretic ears was 0.34 cc compared to an average of 0.51 cc for the nonatretic ears. The mean ratio of the atretic to nonatretic volume was 0.67. In patients who underwent serial scans, no statistically significant difference in rates of growth existed between atretic and nonatretic ears. Finally, measures of middle ear volume correlated well with clinical grading scales.
Both middle ear volume and the ratio of the atretic volume to nonatretic volume serve as useful adjunct measurements in determining surgical candidacy. The practitioner may be better able to assess surgical candidacy by supplementing classic atresia classification systems with middle ear volume measurements.
检测中耳闭锁患者的中耳容积，并研究中耳容积作为辅助指标在确定手术适应症中的作用。
我们对一家三级学术性儿科耳鼻喉科诊所的中耳闭锁患儿进行了回顾性研究。对颞骨的高分辨率多平面CT扫描进行分析以测量中耳容积，并根据现有的临床分级量表进行分期。将闭锁耳与同一患者的非闭锁耳以及对照组的耳朵进行比较。
进行CT检查时患者的平均年龄为4.7岁（范围<0.1 - 13.8岁）。闭锁耳的平均中耳容积为0.34立方厘米，而非闭锁耳的平均中耳容积为0.51立方厘米。闭锁耳与非闭锁耳容积的平均比值为0.67。在接受系列扫描的患者中，闭锁耳和非闭锁耳的生长速率无统计学显著差异。最后，中耳容积测量结果与临床分级量表相关性良好。
中耳容积以及闭锁耳与非闭锁耳的容积比值均是确定手术适应症的有用辅助指标。通过用中耳容积测量补充经典的闭锁分类系统，医生可能能够更好地评估手术适应症。
