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Kulak Burun Boğaz ve Baş Boyun Cerrahisi Dergisi
ISSN: 1300-6525
İndekslendiği Dizinler: Türkiye Atıf Dizini
Dil: Türkçe, İngilizce

 

RESEARCH


Effects of Occupational Noise on Vestibular Evoked Myogenic Potentials

*Dr. Elif AKSOY, **Dr. Şenol POLAT, ***Dr. Gediz Murat SERİN, ****Dr. Özlem GEDİK SOYUYÜCE, ****Dr. Zeynep GENCE GÜMÜŞ, **Dr. Ömer Faruk ÜNAL, **Dr. Hasan TANYERİ

* Acıbadem Maslak Hastanesi, KBB ve Baş Boyun Cerrahisi Kliniği,
** Acıbadem Üniversitesi Tıp Fakültesi, KBB ve Baş Boyun Cerrahisi AD,
*** Acıbadem Bakırköy Hastanesi, KBB ve Baş Boyun Cerrahisi Kliniği,
****Acıbadem Maslak Hastanesi, Odyoloji Kliniği, İstanbul




Objective: To evaluate possible effects of chronic noise exposure on the vestibular system with vestibular evoked myogenic potentials (VEMP).
Material and Methods: After getting an approval from the local ethical committe of our institution, audiometry, transient evoked otoacoustic emission (TEOAE) and VEMP tests were performed on 15 volunteers exposed to chronic noise. Delayed VEMP was defined as the latency of peak P1 exceeding 15.09 milliseconds and/or of peak N1 exceeding 22.05 milliseconds. Six female, nine male volunteers working at the central sterilization unit of our hospital were aged between 23 and 45 (mean 32) and ten volunteers with similar demographic properties who were not exposed to chronic noise were included in the study as study and a control groups and they had gone through the same tests. The mean occupational noise exposure time interval of the volunteers included in the study group changed between 8 months and 7 years (mean 2.68 years ± 1.8). All of the volunteers who were included in the study group of this prospectively planned research had gone through ear nose and throat (ENT) examinations. Volunteers over 65 years old and with a history of previous ENT disease were not included in the study.
Results: None of the patients included in the study had vestibular symptoms (vertigo). The otoscopic examinations of all volunteers were normal. Hearing thresholds of the seven volunteers included in the study group were within normal limits (7/15, 46% ) and they did not have notched audiograms at 4kHz. Although pure tone hearing thresholds of the eight volunteers were within normal limits, they had bilateral notched audiograms at 4 kHz and >40dB hearing loss (53%, 8/15). Otoacoustic emissions (TEOAE) of all volunteers were present. VEMP responses of the all the volunteers of control group and 13 volunteers of the study group were present (87%, 13/ 15). In the study group, mean VEMP latencies of the right and left ears were measured and P1 and N1 peak values were 12.77ms- 19.55ms and 12.82 ms-19.62ms respectively. Only two (13.3%, 2/15) of eight volunteers with noise-induced hearing loss, who had a 4kHz notch and hearing loss >40dB on audiograms showed slightly delayed VEMP responses. When VEMP latencies of the control group were measured, peak P1 and N1 latencies of the right and left ears were 11.35 ms-18.42ms and 11.37ms-18.47 respectively.
Conclusion: As a result, according to our study data, the rate of vestibular dysfunction which can be detected with VEMP is 13,3% of the cases exposed to chronic noise.


Keywords: VEMP; chronic noise; hearing loss; vestibular system

KBB ve BBC Dergisi 19 (3):139-43, 2011

 

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