الفهرس 
ANATOMY OF THE INNER EAROnly 14 pages are availabe for public view
 |  | from | 183 |  |  |
| | | from | 183 | | |
Abstract
OBJECTIVE: estimation of enlarged vestibular aqueduct (EVA) percent in children with non-syndromic sensorineural hearing loss (SNHL) & trying to correlate its size with the degree of hearing loss. METHODS: Non contrast CT scan of petrous bone in both axial & coronal planes was done to 16 patients. Vestibular aqueducts (VAs) were measured at 2 points (midpoint & operculum) on both right & left sides. Pure tone audiometry, speech audiometry and immittancemetry assessments were also done to the study group. RESULTS: the study group was further subdivided according to vestibular aqueduct size into 3 groups: group A (EVA), group B (borderline EVA) & group C (normal VA). There were no statistically significant differences between the 3 groups as regard laterality, degree of hearing loss, PTA configuration and word discrimination score (WDS%). Pearson correlation coefficient was done between VA midpoint & operculum with different variables (age, pure tone thresholds at main six frequencies & WDS% ) showing no significant correlation. However, it showed significant correlation between vestibular aqueduct midpoint & operculum with each other. CONCLUSION: EVA is not related to the level of hearing loss or configuration. Inspite of insignificant findings high frequency hearing loss is the most common configuration seen in EVAS.
Keywords:
Enlarged vestibular aqueduct syndrome, children, non-syndromic sensorineural hearing loss, high resolution CT scan, vestibular aqueduct midpoint and operculum