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Evaluation of cochlear function in patients with normal hearing and tinnitus: a distortion product otoacoustic emission study

Year 2003, Volume: 10 Issue: 5, 177 - 182, 18.10.2003

Abstract

Objectives: We investigated cochlear function in normal- hearing patients with tinnitus using distortion product otoa­ coustic emissions DPOAE .Patients and Methods: The study included 20 normal-hear- ing patients with tinnitus 13 males, 7 females; mean age 25 years; range 17 to 52 years and 15 Controls 10 males, 5 females; mean age 23 years; range 18 to 27 years with nor­ mal hearing. Both groups undervvent routine audiological tests including audiometry and tympanometry. Cubic DPOAEs were recorded from both groups. Signal-to-noise ratios SNRs lower than the 10th percentile of the control values were regarded as abnormal or undetectable.Results: Tinnitus was bilateral in seven patients and unilat- eral in 13 patients. Seven patients with unilateral tinnitus and ali patients with bilateral tinnitus had a history of exposure to noise. The mean perceived frequencies for tinnitus were 6.3 kHz and 6.2 kHz in the left and right ears, respectively.Loudness was measured as 8 dB SL in the left ears, and 7 dB SL in the right ears. Compared to unilateral cases, patients with bilateral tinnitus exhibited a higher percentage of abnormal SNRs at most frequencies. Some asymptomatic ears in the patient group had abnormal results.Conclusion: These findings show that tinnitus in normal- hearing patients is often associated with varying degrees of cochlear dysfunction. The results also suggest that tinnitus may be regarded as an early manifestation of noise-induced hearing loss in patients with a history of exposure to noise.

References

  • Littman TA, Magruder A, Strother DR. Monitoring and predicting ototoxic damage using distortion-prod- uct otoacoustic emissions: pediatric case study. J Am Acad Audiol 1998;9:257-62.
  • Musiek FE, Smurzynski J, Bornstein SP. Otoacoustic emissions testing in adults: an overview. Am J Otol ;15 Suppl:21-8. Unilateral ears 1 10 7 6 Bilateral ears Right 7000 10 7 2 2 1 7 Right 9000 Left Right 6000 Left

Normal işiten tinnituslu olgularda koklear fonksiyonun değerlendirilmesi: Distorsiyon product otoakustik emisyon çalışması

Year 2003, Volume: 10 Issue: 5, 177 - 182, 18.10.2003

Abstract

Amaç: İflitmesi normal olan çınlamalı hastalarda distorsiyon product otoakustik emisyon DPOAE testi ile koklearfonksiyon incelendi.Hastalar ve Yöntemler: Bu prospektif çalıflmada iflitmesinormal ancak çınlaması olan 20 hasta ile herhangi bir flikayeti olmayan 15gönüllü incelendi. Her iki grupta odyometrik ve timpanometriktestler yapıldı. Daha sonra her iki gruba kübik DPOAE testiyapıldı. Testin değerlendirilmesinde kontrol grubunun %10percentil değerlerinin altında kalan sinyal/gürültü oranı SNR değerleri anormal veya DPOAE yokluğu olarak kabul edildi.B u l g u l a r : Çınlama yedi hastada iki taraflı, 13 hastada tektaraflı idi. Tek kulakta çınlama olan olguların yedisinde, ikikulağında çınlama olan olguların tümünde gürültüye maruzkalma öyküsü saptandı. Ortalama çınlama frekansı solda6.3 kHz, sağda 6.2 kHz bulundu. Çınlama fliddeti solda vesağda sırasıyla 8 ve 7 dB SL olarak ölçüldü. Tek taraflı tutulumu olan olgulara kıyasla, iki taraflı çınlama olan olgularda anormal SNR değerlerinin yüzdesi çoğu frekansta dahayüksek idi. Bazı tek taraflı olguların asemptomatik kulaklarında da anormal SNR değerleri elde edildi.Sonuç: Elde edilen bulgular, iflitmesi normal ancak çınlaması olan olgularda belli derecelerde koklear disfonksiyonolduğunu; gürültüye maruz kalma öyküsü saptanan olgul a r d a , çınlamanın gürültüye bağlı iflitme kaybının erkenhabercisi olabileceğini göstermektedir

References

  • Littman TA, Magruder A, Strother DR. Monitoring and predicting ototoxic damage using distortion-prod- uct otoacoustic emissions: pediatric case study. J Am Acad Audiol 1998;9:257-62.
  • Musiek FE, Smurzynski J, Bornstein SP. Otoacoustic emissions testing in adults: an overview. Am J Otol ;15 Suppl:21-8. Unilateral ears 1 10 7 6 Bilateral ears Right 7000 10 7 2 2 1 7 Right 9000 Left Right 6000 Left
There are 2 citations in total.

Details

Primary Language English
Journal Section Research Article
Authors

Bülent Satar This is me

Osman Kapkın This is me

Yalçın Özkaptan This is me

Publication Date October 18, 2003
Published in Issue Year 2003 Volume: 10 Issue: 5

Cite

APA Satar, B., Kapkın, O., & Özkaptan, Y. (2003). Evaluation of cochlear function in patients with normal hearing and tinnitus: a distortion product otoacoustic emission study. The Turkish Journal of Ear Nose and Throat, 10(5), 177-182.
AMA Satar B, Kapkın O, Özkaptan Y. Evaluation of cochlear function in patients with normal hearing and tinnitus: a distortion product otoacoustic emission study. Tr-ENT. October 2003;10(5):177-182.
Chicago Satar, Bülent, Osman Kapkın, and Yalçın Özkaptan. “Evaluation of Cochlear Function in Patients With Normal Hearing and Tinnitus: A Distortion Product Otoacoustic Emission Study”. The Turkish Journal of Ear Nose and Throat 10, no. 5 (October 2003): 177-82.
EndNote Satar B, Kapkın O, Özkaptan Y (October 1, 2003) Evaluation of cochlear function in patients with normal hearing and tinnitus: a distortion product otoacoustic emission study. The Turkish Journal of Ear Nose and Throat 10 5 177–182.
IEEE B. Satar, O. Kapkın, and Y. Özkaptan, “Evaluation of cochlear function in patients with normal hearing and tinnitus: a distortion product otoacoustic emission study”, Tr-ENT, vol. 10, no. 5, pp. 177–182, 2003.
ISNAD Satar, Bülent et al. “Evaluation of Cochlear Function in Patients With Normal Hearing and Tinnitus: A Distortion Product Otoacoustic Emission Study”. The Turkish Journal of Ear Nose and Throat 10/5 (October 2003), 177-182.
JAMA Satar B, Kapkın O, Özkaptan Y. Evaluation of cochlear function in patients with normal hearing and tinnitus: a distortion product otoacoustic emission study. Tr-ENT. 2003;10:177–182.
MLA Satar, Bülent et al. “Evaluation of Cochlear Function in Patients With Normal Hearing and Tinnitus: A Distortion Product Otoacoustic Emission Study”. The Turkish Journal of Ear Nose and Throat, vol. 10, no. 5, 2003, pp. 177-82.
Vancouver Satar B, Kapkın O, Özkaptan Y. Evaluation of cochlear function in patients with normal hearing and tinnitus: a distortion product otoacoustic emission study. Tr-ENT. 2003;10(5):177-82.