Cigarette smoking effect on human cochlea responses

Authors
Mehrdad Rogha 1
Mostafa Hashemi 1
Narges Askari 1
Seyed Hamidreza Abtahi 1
Mahsa Sepehrnejad 2
Mohammadhasan Nilforoush 2
1 Department of Otolaryngology, Al-Zahra Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
2 Department of Audiology, School of Rehabilitation Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
Abstract
Background: Smoking is one of the most important risk factor in increasing of non-communicable disorders, especially chronic diseases such as cancer, stroke, heart and respiratory diseases. Cigarette smoking could damage the cochlea and causing hearing loss. The otoacoustic emission (OAE) is a source of information for determining cochlear responses to sound stimuli and how to change the response of the auditory system in some diseases. OAE test was sensitive to outer hair cells (OHCs) activity.
Materials and Methods: In this study, tried to evaluate a hearing threshold of the smoker group versus non-smoker ones through pure tone audiometery, transient evoked otoacoustic emission (TEOAE) and distortion product otoacoustic emission (DPOAE) tests.
Results: The results indicated that significant decrement of 8000 Hz threshold, reduced DPOAE/TEOAE amplitude in the smoker group than non-smoker one (P < 0.05). DPOAE amplitudes decline reflects the cochlear damage caused by smoking.
Conclusion: OAEs test was clinically non-invasive, accurate, and objective evaluation of the performance of cochlear OHCs.

Keywords

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Advanced Biomedical Research
Volume 2015, july
July 2015
Pages 1-3