Home Ahead of print Instructions Contacts
About us Current issue Submit article Advertise  
Editorial board Archives Subscribe Login   
CASE REPORT
Year : 2020  |  Volume : 26  |  Issue : 4  |  Page : 274-276

The evidence of noninner ear involvement in the presence of depressed bone conduction threshold at 2 kHz frequency


Department of Audiology and Speech Pathology, School of Health Sciences, Universiti Sains Malaysia, Kelantan, Malaysia

Correspondence Address:
Prof. Mohd Normani Zakaria
Department of Audiology and Speech Pathology, School of Health Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan
Malaysia
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/indianjotol.INDIANJOTOL_105_20

Rights and Permissions

Pure-tone audiometry is a standard clinical test for hearing diagnosis. Air–bone gaps derived from the difference between air conduction (AC) and bone conduction (BC) thresholds are important indicators to distinguish between different types of hearing losses. Even though BC thresholds are typically unaffected in conductive hearing loss (CHL) cases, a notch or depression at 2 kHz frequency (i.e., Carhart notch) could occur, which could be mistakenly considered as the involvement of sensorineural hearing loss (SNHL). In this article, it was clearly demonstrated that the BC notch at 2 kHz (that could exceed the normal limit) was in fact related to CHL (not SNHL). That is, in this case, both AC and BC thresholds became “perfectly” normal after the treatment (and the notch at 2 kHz disappeared). Several useful points were highlighted from the present case report to guide clinicians, medical trainees, and respective students to avoid misdiagnosis in clinical practice.


[FULL TEXT] [PDF]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed134    
    Printed0    
    Emailed0    
    PDF Downloaded26    
    Comments [Add]    

Recommend this journal