Classifying the Large Vestibular Aqueduct: Morphometry to Audiometry.
Otol Neurotol
; 44(1): 47-53, 2023 01 01.
Article
in En
| MEDLINE
| ID: mdl-36509439
ABSTRACT
OBJECTIVE:
Large vestibular aqueduct (LVA) is the most common inner ear dysplasia identified in patients with hearing loss. Our objective was to systematically quantify LVA morphologies and correlate imaging findings with established audiometric outcomes. STUDYDESIGN:
Retrospective review.SETTING:
Tertiary referral center. PATIENTS Patients with large vestibular aqueduct identified radiographically, with or without hearing loss.INTERVENTIONS:
Diagnostic only. MAIN OUTCOMEMEASURES:
Vestibular aqueduct (VA) width at midpoint, width at external aperture, and length were measured on cross-sectional imaging. Morphology was classified as type I (borderline), type II (tubular), or type III (funneled). Audiometric endpoints included air/bone conduction, pure tone averages, and air-bone gaps at 250 and 500 Hz. Statistical associations were evaluated using linear regression models, adjusted for age at first audiogram and sex.RESULTS:
One hundred seventeen patients (197 ears) were included, with mean age at first audiogram of 22.2 years (standard deviation, 21.7 yr). Imaging features associated with poor audiometric outcomes were increasing VA width at midpoint and external aperture, decreasing VA length, dilated extraosseous endolymphatic sac, cochleovestibular malformations, and increasing VA type (III > II > I).CONCLUSIONS:
Quantitative LVA measurements and a standardized morphologic classification system aid in prediction of early audiometric endpoints.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Vestibular Aqueduct
/
Deafness
/
Hearing Loss
/
Hearing Loss, Sensorineural
Type of study:
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limits:
Humans
Language:
En
Journal:
Otol Neurotol
Journal subject:
NEUROLOGIA
/
OTORRINOLARINGOLOGIA
Year:
2023
Document type:
Article