dc.contributor.advisor |
Thorne, P |
en |
dc.contributor.author |
Lowe, Nathan |
en |
dc.date.accessioned |
2018-09-11T03:45:57Z |
en |
dc.date.issued |
2018 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/37680 |
en |
dc.description |
Full text is available to authenticated members of The University of Auckland only. |
en |
dc.description.abstract |
Superior semi-circular canal dehiscence syndrome (SCDS) is an inner ear disorder associated with auditory and vestibular symptoms that can be debilitating for some patients. A previous study (Brantberg et al. 2016) suggests that low-frequency bone-conduction (BC) threshold testing at the vertex and ankle using a Minishaker 4810 transducer may discriminate SCDS with greater accuracy than conventional mastoid BC threshold testing using a B71 transducer. The primary objective of this study was to compare the discriminative accuracy of vertex and ankle BC threshold testing with conventional mastoid testing using a B71 transducer at all locations. Secondary aims included investigating the symptoms associated with SCDS and determining the discriminative accuracy of interaural compliance and resonant frequency asymmetry as potential SCDS screening tools. Ten individuals with SCDS and 15 normal hearing control participants underwent conventional audiometry and immittance testing. In addition, all participants underwent low-frequency (250 to 1000 Hz) vertex and ankle BC threshold testing and multi-frequency tympanometry. Statistical comparisons were made between groups, across frequency, and location for BC measures, as well as between groups and between ears for immittance. The symptoms prompting seven participants with SCDS to seek medical attention were auditory/aural rather than vestibular in nature. The SCDS group had significantly lower BC thresholds and larger air-bone-gaps (ABGs) than controls for both mastoid and vertex stimulation, and the between group differences were largest at 250 Hz for vertex stimulation. Receiver operating characteristic analysis revealed that ABGs at both locations discriminated SCDS with good or excellent accuracy for all four frequencies. For BC thresholds, only 250 Hz mastoid and 250 and 500 Hz vertex measures were useful discriminators. Overall, 250 Hz vertex ABGs ≥ 15 dB HL achieved the highest sensitivity (100%) and specificity (93.3%) |
en |
dc.publisher |
ResearchSpace@Auckland |
en |
dc.relation.ispartof |
Masters Thesis - University of Auckland |
en |
dc.relation.isreferencedby |
UoA99265077213402091 |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights |
Restricted Item. Available to authenticated members of The University of Auckland. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.rights.uri |
http://creativecommons.org/licenses/by-nc-sa/3.0/nz/ |
en |
dc.title |
Can Bone-Conduction Audiometry at the Vertex or Ankle Improve Superior Semi-Circular Canal Dehiscence Identification? |
en |
dc.type |
Thesis |
en |
thesis.degree.discipline |
Audiology |
en |
thesis.degree.grantor |
The University of Auckland |
en |
thesis.degree.level |
Masters |
en |
dc.rights.holder |
Copyright: The author |
en |
pubs.elements-id |
752995 |
en |
pubs.record-created-at-source-date |
2018-09-11 |
en |
dc.identifier.wikidata |
Q112937266 |
|