Affiliation:
1. Ear Science Institute Australia, Ear Sciences Centre, School of Surgery, University of Western Australia, Nedlands, Western Australia, Australia
2. Perth Radiological Clinic, Subiaco, Western Australia, Australia
Abstract
Introduction: This study aimed to examine the relationship between the air-bone gap (ABG) and the size of the superior semicircular canal dehiscence (SSCD) as measured on a computed tomography (CT) scan. Materials and Methods: The study design was a case series with chart review. Twenty-three patients (28 ears) from a tertiary referral centre were diagnosed with SSCD. The size of the dehiscence on CT scans and the ABG on pure-tone audiometry were recorded. Results: The size of the dehiscence ranged from 1.0 to 6.0 mm (mean, 3.5 ± 1.6 mm). Six ears with a dehiscence measuring less than 3.0 mm did not have an ABG (0 dB). The remaining 18 ears showed an average ABG at 500, 1000, and 2000 Hz (AvABG500-2000) ranging from 3.3 to 27.0 dB (mean, 11.6 ± 5.7 dB). The analysis of the relationship between the dehiscence size and AvABG500-2000 revealed a correlation of R2 = 0.828 (P <0.001, quadratic fit) and R2 = 0.780 (P <0.001, linear fit). Therefore, the larger the dehiscence, the larger the ABG at lower frequencies on pure-tone audiometry. Conclusion: In SSCD patients, an ABG is consistently shown at the low frequency when the dehiscence is larger than 3 mm. The size of the average ABG correlates with the size of the dehiscence. These findings highlight the effect of the dehiscence size on conductive hearing loss in SSCD and contribute to a better understanding of the symptomatology of patients with SSCD.
Key words: CT scan, Hyperacusis, Tullio's phenomenon, Vertigo
Publisher
Academy of Medicine, Singapore
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. Doctor-Patient Communication;Third Mobile Window Syndrome of the Inner Ear;2022
2. Diagnostic Testing of Third Mobile Window Disorders;Third Mobile Window Syndrome of the Inner Ear;2022