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Effect of chronic suppurative otitis media on distortion product otoacoustic emission input–output functions in conventional and ultra-high frequencies

Published online by Cambridge University Press:  21 October 2019

S I Kirubaharane
Affiliation:
Department of ENT, Jawaharlal Institute of Postgraduate Medical Education and Research (‘JIPMER’), Puducherry, India
S Palani*
Affiliation:
Department of ENT, Jawaharlal Institute of Postgraduate Medical Education and Research (‘JIPMER’), Puducherry, India
A Alexander
Affiliation:
Department of ENT, Jawaharlal Institute of Postgraduate Medical Education and Research (‘JIPMER’), Puducherry, India
A Sreenivasan
Affiliation:
Department of ENT, Jawaharlal Institute of Postgraduate Medical Education and Research (‘JIPMER’), Puducherry, India
*
Author for correspondence: Mr. Saravanan Palani, Department of ENT, Jawaharlal Institute of Postgraduate Medical Education and Research (‘JIPMER’), Dhanvantri Nagar, Puducherry 605006, India E-mail: saravananpaud@gmail.com

Abstract

Background

Detection and valid measurements of distortion product otoacoustic emissions are not influenced by cochlear status alone, but also by middle-ear status. There is a need to understand the use of ultra-high frequency distortion product otoacoustic emissions in cases of abnormal distortion product otoacoustic emission findings for conventional frequencies related to the middle-ear condition.

Method

The present study investigated distortion product otoacoustic emission input–output functions in conventional and ultra-high frequencies in: 37 adults with chronic suppurative otitis media (clinical group) and 37 adults with normal hearing sensitivity (control group).

Results

There were significant reductions in distortion product otoacoustic emission amplitude and mean signal-to-noise ratio in the clinical group compared to the control group, especially for conventional frequencies.

Conclusion

There was a significant reduction in the rate of ears with measurable distortion product otoacoustic emissions in the clinical group, especially for conventional frequencies. The effect of chronic suppurative otitis media was more pronounced in the conventional frequency range compared to the smaller effect seen in the ultra-high frequency range.

Information

Type
Main Articles
Copyright
Copyright © JLO (1984) Limited, 2019 

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