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Evaluation of tinnitus patients with normal hearing sensitivity using TEOAEs and TEN test.
Auris Nasus Larynx. 2009 Dec; 36(6):633-6.AN

Abstract

OBJECTIVES

This study was designed to investigate the possibility of underlying cochlear damage whether outer hair cells (OHCs) or inner hair cells (IHCs) in tinnitus suffering patients with normal hearing sensitivity, using transient evoked otoacoustic emission (TEOAEs) and threshold equalizing noise (TEN) test, if any.

METHODS

Twenty patients suffering from unilateral tinnitus with normal hearing sensitivity participated in this study. Their other ear acted as control ears. They were subjected to full history taking, otoscopy, basic audiologic evaluation, TEOAEs and TEN test.

RESULTS

TEOAEs were abnormal in 85% of the tinnitus ears compared to 20% in control ears; this difference was statistically significant. The abnormal TEOAEs frequency bands in the tinnitus ears were statistically significant above 2000 Hz when compared to the control ears and were more common for the 4000 and 5000 Hz. This suggests that OHCs dysfunction may be important in the generation of tinnitus. TEN test demonstrated dead regions in the cochlea in 15% of the tinnitus ears only. This might be attributed to increased resistance of IHCs to damage compared to OHCs vulnerability. The affected frequency location was at 500 Hz in 5%, 3000 and 4000 Hz in 10% of tinnitus ears.

CONCLUSION

This work has shown a higher prevalence of OAE abnormalities in tinnitus patients with normal hearing in contrast to TEN test denoting the more vulnerability of OHCs to damage.

Authors+Show Affiliations

ENT - HNS Dept., Mansoura College of Medicine, Mansoura University, 29 Bank Misr St., Mansoura, Egypt. elsaeid@mans.edu.eg

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19285816

Citation

Thabet, Elsaeid Mohamed. "Evaluation of Tinnitus Patients With Normal Hearing Sensitivity Using TEOAEs and TEN Test." Auris, Nasus, Larynx, vol. 36, no. 6, 2009, pp. 633-6.
Thabet EM. Evaluation of tinnitus patients with normal hearing sensitivity using TEOAEs and TEN test. Auris Nasus Larynx. 2009;36(6):633-6.
Thabet, E. M. (2009). Evaluation of tinnitus patients with normal hearing sensitivity using TEOAEs and TEN test. Auris, Nasus, Larynx, 36(6), 633-6. https://doi.org/10.1016/j.anl.2009.01.002
Thabet EM. Evaluation of Tinnitus Patients With Normal Hearing Sensitivity Using TEOAEs and TEN Test. Auris Nasus Larynx. 2009;36(6):633-6. PubMed PMID: 19285816.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of tinnitus patients with normal hearing sensitivity using TEOAEs and TEN test. A1 - Thabet,Elsaeid Mohamed, Y1 - 2009/03/13/ PY - 2008/10/21/received PY - 2008/11/27/revised PY - 2009/01/23/accepted PY - 2009/3/17/entrez PY - 2009/3/17/pubmed PY - 2009/12/31/medline SP - 633 EP - 6 JF - Auris, nasus, larynx JO - Auris Nasus Larynx VL - 36 IS - 6 N2 - OBJECTIVES: This study was designed to investigate the possibility of underlying cochlear damage whether outer hair cells (OHCs) or inner hair cells (IHCs) in tinnitus suffering patients with normal hearing sensitivity, using transient evoked otoacoustic emission (TEOAEs) and threshold equalizing noise (TEN) test, if any. METHODS: Twenty patients suffering from unilateral tinnitus with normal hearing sensitivity participated in this study. Their other ear acted as control ears. They were subjected to full history taking, otoscopy, basic audiologic evaluation, TEOAEs and TEN test. RESULTS: TEOAEs were abnormal in 85% of the tinnitus ears compared to 20% in control ears; this difference was statistically significant. The abnormal TEOAEs frequency bands in the tinnitus ears were statistically significant above 2000 Hz when compared to the control ears and were more common for the 4000 and 5000 Hz. This suggests that OHCs dysfunction may be important in the generation of tinnitus. TEN test demonstrated dead regions in the cochlea in 15% of the tinnitus ears only. This might be attributed to increased resistance of IHCs to damage compared to OHCs vulnerability. The affected frequency location was at 500 Hz in 5%, 3000 and 4000 Hz in 10% of tinnitus ears. CONCLUSION: This work has shown a higher prevalence of OAE abnormalities in tinnitus patients with normal hearing in contrast to TEN test denoting the more vulnerability of OHCs to damage. SN - 1879-1476 UR - https://www.unboundmedicine.com/medline/citation/19285816/Evaluation_of_tinnitus_patients_with_normal_hearing_sensitivity_using_TEOAEs_and_TEN_test_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0385-8146(09)00003-0 DB - PRIME DP - Unbound Medicine ER -