Shenoy, Vijendra S and Vanka, Siddharth and Rao, Raghavendra A and *, Vishnu Prasad and Kamath, Panduranga M and Bhat, Jayashree S. (2015) Effect of mastoid drilling on the distortion product otoacoustic emissions in the non operated ear. American Journal of Otolaryngology - Head and Neck Medicine and Surgery, 36. pp. 832-836. ISSN 01960709

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Abstract

Objective: To monitor the effect of mastoid drilling on the non-operated ear distortion product otoacoustic emissions. Materials and methods: Distortion product otoacoustic emissions (DPOAEs) were measured at frequencies of f 2 = 2, 3, 4 and 5 kHz, and a frequency ratio f 1 /f 2 = 1.22. DPOAEs were measured in 49 cases, pre and post-operatively who underwent mastoid drilling procedures, compared with each other and with 49 controls who underwent myringoplasty and myringotomy procedures. Results: Amplitudes of DPOAEs decreased significantly in those who underwent mastoidectomies over all the measured frequencies in the immediate post-operative period but had recovered by the seventh post operative day. Conclusion: Drill induced noise can cause temporary decrease in the DPOAEs postoperatively and hence temporary hearing loss for a period of one week.

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