Lela Migirov1, Michael Wolf. 1. Department of Otolaryngology Head and Neck Surgery, Sheba Medical Center (affiliated to Sackler School of Medicine), Tel Aviv University, Tel Aviv, Israel. sabim@bezeqint.net
Abstract
OBJECTIVE: To determine possible changes in the outer hair cell (OHC) function related to drill noise exposure. METHODS: Distortion product otoacoustic emissions (DPOAE) were measured at frequencies of f(2) = 2, 3, 4 and 5 kHz, and a frequency ratio f(1)/f(2) = 1.22. The f(1) and f(2) levels were delivered at 65 dB SPL. DPOAE amplitudes were compared in 13 patients both before and after mastoidectomy, and between these patients and 5 patients who underwent tympanoplasty. RESULTS: The DPOAE amplitudes were significantly decreased at 2 and 4 kHz (p = 0.01 and p = 0.013, respectively) immediately after the mastoidectomy, and still differed from the preoperative results at these frequencies on the first post-mastoidectomy day. After the various individual fluctuations, the DPOAE amplitudes remained decreased in some of the patients at the end of the study. CONCLUSIONS: Drill-induced noise during mastoidectomy can cause reversible changes in DPOAE in the non-operated ear. OHC function may be diminished during the period after mastoid surgery, and last >1 month.
OBJECTIVE: To determine possible changes in the outer hair cell (OHC) function related to drill noise exposure. METHODS: Distortion product otoacoustic emissions (DPOAE) were measured at frequencies of f(2) = 2, 3, 4 and 5 kHz, and a frequency ratio f(1)/f(2) = 1.22. The f(1) and f(2) levels were delivered at 65 dB SPL. DPOAE amplitudes were compared in 13 patients both before and after mastoidectomy, and between these patients and 5 patients who underwent tympanoplasty. RESULTS: The DPOAE amplitudes were significantly decreased at 2 and 4 kHz (p = 0.01 and p = 0.013, respectively) immediately after the mastoidectomy, and still differed from the preoperative results at these frequencies on the first post-mastoidectomy day. After the various individual fluctuations, the DPOAE amplitudes remained decreased in some of the patients at the end of the study. CONCLUSIONS:Drill-induced noise during mastoidectomy can cause reversible changes in DPOAE in the non-operated ear. OHC function may be diminished during the period after mastoid surgery, and last >1 month.
Authors: Robert P Morse; Alistair Mitchell-Innes; Andreas N Prokopiou; Richard M Irving; Philip A Begg Journal: Eur Arch Otorhinolaryngol Date: 2022-07-14 Impact factor: 3.236
Authors: Murat Samet Ates; Murat Benzer; Isa Kaya; Huseyin Biceroglu; Erkin Ozgiray; Rasit Midilli; Halil Bulent Karci; Sercan Gode Journal: J Neurol Surg B Skull Base Date: 2019-01-10