Young N M, Hughes C A, Byrd S E, Darling C
Division of Pediatric Otolaryngology, Children's Memorial Medical Center, and the Department of Otolaryngology-Head and Neck Surgery, Northwestern University Medical School, Chicago, Illinois 60614, USA.
Otolaryngol Head Neck Surg. 2000 Feb;122(2):183-8. doi: 10.1016/S0194-5998(00)70236-1.
The goals of this study were to retrospectively review high-resolution CTs (HRCTs) of pediatric postmeningitic cochlear implant recipients and to correlate results with surgical findings.
HRCTs of 20 children (11 months to 12 years old) who underwent implantation with multichannel devices were reviewed. Results were correlated with the degree of ossification observed at surgery.
Ninety percent of subjects required drilling of ossified bone within the basal turn at surgery. HRCT of the cochleas suggested ossification within the basal turn in 45% (50% sensitivity). Ossification of the lateral semicircular canal on HRCT was present in 72% (77% sensitivity). Five of 6 cases without radiographic evidence of ossification had positive findings at surgery.
Ossification is a common occurrence in postmeningitic deaf children. Ossification of the lateral semicircular canal on HRCT is a more sensitive measure for predicting ossification than evidence of cochlear involvement. Absence of ossification on HRCT is no guarantee of cochlear patency at the time of implantation.
本研究的目的是回顾性分析小儿脑膜炎后人工耳蜗植入受者的高分辨率CT（HRCT），并将结果与手术发现相关联。
回顾了20名（年龄11个月至12岁）接受多通道装置植入的儿童的HRCT。结果与手术中观察到的骨化程度相关。
90%的受试者在手术中需要钻开蜗底的骨化骨。耳蜗的HRCT显示45%的受试者蜗底有骨化（敏感性为50%）。HRCT显示72%的受试者存在外侧半规管骨化（敏感性为77%）。6例HRCT无骨化影像学证据的病例中有5例在手术中有阳性发现。
骨化在脑膜炎后致聋儿童中很常见。HRCT上外侧半规管的骨化比耳蜗受累的证据更能敏感地预测骨化情况。HRCT上无骨化并不能保证植入时耳蜗通畅。
