International Journal of Head and Neck Surgery

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VOLUME 3 , ISSUE 3 ( September-December, 2012 ) > List of Articles

RESEARCH ARTICLE

How Drill-Generated Acoustic Trauma effects Hearing Functions in an Ear Surgery?

Mustafa Paksoy, Arif Sanli, Umit Hardal, Sermin Kibar, Gokhan Altin, Banu Atalay Erdogan, Zekiye Eda Bekmez

Citation Information : Paksoy M, Sanli A, Hardal U, Kibar S, Altin G, Erdogan BA, Bekmez ZE. How Drill-Generated Acoustic Trauma effects Hearing Functions in an Ear Surgery?. Int J Head Neck Surg 2012; 3 (3):127-132.

DOI: 10.5005/jp-journals-10001-1112

Published Online: 01-12-2013

Copyright Statement:  Copyright © 2012; The Author(s).


Abstract

Objective

In otology, a wide variety of devices are used that have significant noise output, both operated ear and the patient. We aimed to determine hearing damages due to drill-generated acoustic trauma in ear surgery. We want to find how degree drill-generated acoustic trauma is responsible from sensorineural hearing loss in ear surgery.

Materials and methods

We designed a retrospective study about 100 patients who underwent radical or modiphied radical mastoidectomy and tympanoplasty. The audiometric testing was done both pre and postoperatively to detect any significant hearing loss in the immediate postoperative period. The data were analyzed using the Wilcoxon sign and Mann-Whitney U tests. This study proposes that hearing loss is caused by drill noise conducted to the operated ear by vibrations of temporal bone.

Results

A sensorineural hearing loss soon after mastoid surgery is seen due to the noise generated by the drill. Mean pure-tone thresholds obtained was significantly more in mastoidectomy applied patients when compared to tympanoplasty . Mean bone conduction (BC) hearing levels impaired 6,6 dB in 1 kHz, 5.5 dB in 0.5 kHz, 5 dB in 4.kHz and 3.1 dB in 2 kHz in mastoidectomy groups but improved 5.5 dB in 0.5 kHz, 2.2 dB in 1 kHz, 2.7 dB in 2 kHz in tympanoplasty groups. Statistically significant differences were observed at the 0.5-1 and 4 kHz frequencies pre and postoperative in the hearing thresholds of BC changing in mastoidectomy group, however, the averages of ranks of all pre and postoperative measurement of hearing levels show differences between mastoidectomy and tympanoplasty groups was significant in statistically at independent groups (p < 0.05).

Conclusion

We conclude that drill-generated noise during mastoid surgery has been incriminated as a cause of sensorineural hearing loss. Drilling during mastoid surgery may result in temporary or permanent noise-induced hearing loss. Possible noise disturbance to the inner ear can only be avoided by minimizing the duration of harmful noise exposure and carefull using burr to near the cochlear structures.

How to cite this article

Paksoy M, Sanli A, Hardal U, Kibar S, Altin G, Erdogan BA, Bekmez ZE. How Drill-Generated Acoustic Trauma effects Hearing Functions in an Ear Surgery? Int J Head and Neck Surg 2012;3(3):127-132.


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  1. Evaluation of the usefulness of a silicone tube connected to a microphone in monitoring noise levels induced by drilling during mastoidectomy and cochleostomy. Acta Otolaryngol 2010 Oct;130(10):1163-68.
  2. Does drill noise during mastoid surgery affect the contralateral ear? Am J Otol 1985 Jul;6(4):334-35.
  3. Variables affecting the drillgenerated noise levels in ear surgery. Acta Otolaryngol 1977 Sep-Oct;84(3-4):252-9.
  4. Does drill-induced noise have an impact on sensorineural hearing during craniotomy procedure? Br J Neurosurg 2010 Feb;24(1):40-45.
  5. Drill-generated noise levels in ear surgery. Acta Otolaryngol 1976 Nov-Dec;82(5-6):402-09.
  6. Implications of sound levels generated by otologic devices. Otolaryngol Head Neck Surg 2001 Oct;125(4):361-63.
  7. Drill-generated sensorineural hearing loss following mastoid surgery. Laryngoscope 1992 Jun;102(6):689-92.
  8. Drill-induced hearing loss in the nonoperated ear. Otolaryngol Head Neck Surg 1997 Nov;117(5):555-58.
  9. Sensorineural high-frequency hearing loss after drill-generated acoustic trauma in tympanoplasty. Arch Otorhinolaryngol 1989;246(5): 280-82.
  10. Cochlear damage caused by middle ear surgeries. Laryngorhinootologie 1991 Feb;70(2):66-71.
  11. The contralateral ear after translabyrinthine removal of acoustic neuromas: Is there a drill-noise generated hearing loss? J Laryngol Otol 1989 Sep;103(9):845-49.
  12. Rock drills used in South African mines: A comparative study of noise and vibration levels. Ann Occup Hyg 2007 Apr;51(3):305-10.
  13. Scanning electron microscopic study of the organ of Corti in normal and sound-damaged guinea pigs. Ann Otol Rhinol Laryngol 1976 Jul-Aug;85(4 Pt 2 Suppl 29):1-58.
  14. Peroperative drill-generated noise levels in ear surgery. Acta Otolaryngol 1979 May-Jun;87(5-6):458-60.
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