Aetiology of Asymmetrical Hearing Loss: A Retro-spective Study Thesis Submitted for Partial Fulfillment of Master Degree in Audio-Vestibular Medicine
Study Details
Study Description
Brief Summary
Hearing loss maybe: -Symmetrical: in which the severity and pattern of hearing loss are the same in each ear. Or -Asymmetrical: is defined as binaural difference in bone conduction thresholds of >10 dB at two consecutive frequencies or >20 dB at one frequency (0.25-8.0 kHz), Poorer speech perception will often accompany poorer hearing and may be the reason for the patient's presentation .Unilateral or asymmetrical sensorineural hearing loss is important to discern, as it is an important risk factor for auditory nerve tumors (i.e. vestibular schwannoma) which is a life threatening condition, and in such cases further investigation is required (i.e. MRI scan) unless there is a known reason for the asymmetry, Several reports have recommended that further evaluation, especially expensive imaging studies, be conducted to rule out acoustic tumors when AHL is present
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| cases patients with asymmetrical hearing loss |
Diagnostic Test: basic audiological evaluation
pure tone audiometry&immitancemetry
Other Names:
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Outcome Measures
Primary Outcome Measures
- Asymmetrical hearing loss [1 year]
asymmetrical hearing loss using basic audiological evalution &imaging
Eligibility Criteria
Criteria
Inclusion Criteria:
-
Age: 6 years old and more.
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Sex: male and female.
Exclusion Criteria:
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Age: less than 6 years old.
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Patients with symmetrical hearing loss.
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Sohag University Hospital | Sohag | Egypt |
Sponsors and Collaborators
- Sohag University
Investigators
None specified.Study Documents (Full-Text)
None provided.More Information
Publications
- Dunn CC, Tyler RS, Oakley S, Gantz BJ, Noble W. Comparison of speech recognition and localization performance in bilateral and unilateral cochlear implant users matched on duration of deafness and age at implantation. Ear Hear. 2008 Jun;29(3):352-9. doi: 10.1097/AUD.0b013e318167b870.
- Margolis RH, Saly GL. Asymmetric hearing loss: definition, validation, and prevalence. Otol Neurotol. 2008 Jun;29(4):422-31. doi: 10.1097/MAO.0b013e31816c7c09.
- Peng AW, Salles FT, Pan B, Ricci AJ. Integrating the biophysical and molecular mechanisms of auditory hair cell mechanotransduction. Nat Commun. 2011 Nov 1;2:523. doi: 10.1038/ncomms1533. Review.
- Plack CJ, Barker D, Hall DA. Pitch coding and pitch processing in the human brain. Hear Res. 2014 Jan;307:53-64. doi: 10.1016/j.heares.2013.07.020. Epub 2013 Aug 11. Review.
- Soh-Med-22-07-09