Document Detail

Air-bone gap and resonant frequency in large vestibular aqueduct syndrome.
MedLine Citation:
PMID:  10993456     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Conductive hearing loss is occasionally recognized in large vestibular aqueduct (LVA) syndrome; however, the incidence rate and the cause are not known. OBJECTIVE: To compare air and bone conduction levels between patients with LVA syndrome and those with idiopathic sudden sensorineural hearing loss, and to investigate the cause of the air-bone gap. STUDY DESIGN: Retrospective study. SETTING: The patients were treated at a tertiary referral center. PATIENTS: Twenty-eight ears of 15 patients with LVA syndrome and 28 ears of patients with idiopathic sudden sensorineural hearing loss were examined. The latter patients were selected from a computerized database to match the former patients in air conduction levels. MAIN OUTCOME MEASURES: Pure-tone audiometry, multiple frequency tympanometry, acoustic reflex, otoacoustic emission, vestibular evoked myogenic response. RESULTS: The air-bone gap in patients with LVA syndrome was always larger than that in patients with idiopathic sudden sensorineural hearing loss with the same air conduction level. The resonant frequency in patients with LVA syndrome was rather low compared with that in normal control subjects, in contrast to the finding that resonant frequency was significantly high in patients with otosclerosis. CONCLUSIONS: An air-bone gap exists to some degree in almost all patients with LVA syndrome. The air-bone gap may not be associated with the movement restriction of the stapes as it is with otosclerosis.
T Nakashima; H Ueda; A Furuhashi; E Sato; K Asahi; S Naganawa; R Beppu
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of otology     Volume:  21     ISSN:  0192-9763     ISO Abbreviation:  Am J Otol     Publication Date:  2000 Sep 
Date Detail:
Created Date:  2001-02-02     Completed Date:  2001-02-02     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7909513     Medline TA:  Am J Otol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  671-4     Citation Subset:  IM    
Department of Otorhinolaryngology, Nagoya University School of Medicine, Japan.
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MeSH Terms
Acoustic Impedance Tests
Audiometry, Pure-Tone
Auditory Threshold / physiology
Bone Conduction / physiology*
Child, Preschool
Evoked Potentials / physiology
Hearing Loss, Conductive / diagnosis*,  etiology*
Hearing Loss, Sudden / diagnosis*
Otoacoustic Emissions, Spontaneous / physiology
Reflex, Acoustic / physiology
Retrospective Studies
Severity of Illness Index
Vertigo / diagnosis
Vestibular Aqueduct / abnormalities*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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