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Effect of mastoid drilling on hearing of the contralateral ear

Published online by Cambridge University Press:  16 September 2013

A Goyal ,
P P Singh  and
A Vashishth
A Goyal*
Affiliation:
Department of ENT and Head and Neck Surgery, University College of Medical Sciences and Guru Teg Bahadur Hospital, New Delhi, India
P P Singh
Affiliation:
Department of ENT and Head and Neck Surgery, University College of Medical Sciences and Guru Teg Bahadur Hospital, New Delhi, India
A Vashishth
Affiliation:
Department of ENT and Head and Neck Surgery, Vardhaman Mahavir Medical College and Safdarjung Hospital, New Delhi, India
*
Address for correspondence: Prof. Arun Goyal, Department of ENT and Head and Neck Surgery, University College of Medical Sciences and Guru Teg Bahadur Hospital, Delhi 110 095, India E-mail: [email protected]
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Abstract

Objectives:

This study aimed to: understand the effect that high intensity noise associated with drilling (during otological surgery) has on hearing in the contralateral ear; determine the nature of hearing loss, if any, by establishing whether it is temporary or persistent; and examine the association between hearing loss and various drill parameters.

Methods:

A prospective clinical study was carried out at a tertiary centre. Thirty patients with unilateral cholesteatoma and normal contralateral hearing were included. Patients were evaluated pre-operatively and for five days following surgery using high frequency pure tone audiometry, and low and high frequency transient evoked and distortion product otoacoustic emission testing.

Results:

The findings revealed statistically significant changes in distortion product otoacoustic emissions at high frequencies (p = 0.016), and in transient evoked otoacoustic emissions at both low and high frequencies (p = 0.035 and 0.021, respectively). There was a higher statistical association between otoacoustic emission changes and cutting burrs compared with diamond burrs.

Conclusion:

Drilling during mastoid surgery poses a threat to hearing in the contralateral ear due to noise and vibration conducted transcranially.

Keywords

Hearing Loss, Noise-InducedMastoidEar, InnerTrauma
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 127 , Issue 10 , October 2013 , pp. 952 - 956
Copyright
Copyright © JLO (1984) Limited 2013 

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Footnotes

Presented orally at the American Academy of Otolaryngology – Head and Neck Surgery Annual Meeting, 26–29 September 2010, Boston, Massachusetts, USA.

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