Transient Evoked Otoacoustic Emissions in Patients with Normal Hearing and in Patients with Hearing Loss

Background: Mastoidectomy is the mainstay of COM treatment . Usage of the micro motor drill has an effect on the contralateral ear due to the noise induced by the drill and the sound-conducting characteristic of the intact skull. Aims And Objectives: 1. To identify the drill induced hearing loss in the contralateral ear, by transient evoked otoacoustic emissions following mastoidectomy. 2. To identify the relation between the type of burr tip used and the amount of hearing loss. Methodology: This study consisted of 63 patients that underwent mastoidectomy. A pre-operative PTA and TEOAE was done. PTA was repeated on POD-1 and POD-7. TEOAE was done on POD-1,3 and 7. Intraoperatively, the type of burr tip used and the individual drilling time for each type of drill bit was recorded. Results: 37 patients developed transient SNHL by POD-3. All patients recovered by POD-30. Higher frequencies of 3000 Hz and 4000 Hz were commonly affected. No change was detected on PTA. Conclusion: The drill is not only a source of noise but is also a strong vibration generator. These strong oscillations are transmitted into the cochlea. Thus surgeons should select appropriate burrs and drills to minimize the temporal bone vibrations.

Download Full-text

School-Age Outcomes in Preterm Children Born with Risk Factors for Hearing Loss: Contralateral Suppression of Transient Evoked Otoacoustic Emissions

Audiology and Neurotology Extra ◽

10.1159/000335462 ◽

2012 ◽

Vol 2 (1) ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Alessandra Spada Durante ◽

Stefanie Mariano ◽

Mariana de Souza Pires ◽

Paulo Pachi

Keyword(s):

Risk Factors ◽

Hearing Loss ◽

Otoacoustic Emissions ◽

School Age ◽

Preterm Children ◽

Transient Evoked Otoacoustic Emissions ◽

Contralateral Suppression

Download Full-text

Early Evidence of Cochlear Damage in a Large Sample of Percussionists

Medical Problems of Performing Artists ◽

10.21091/mppa.2005.3027 ◽

2005 ◽

Vol 20 (3) ◽

pp. 135-139

Author(s):

Jodee A Pride ◽

David R Cunningham

Keyword(s):

Hearing Loss ◽

Hair Cell ◽

Otoacoustic Emissions ◽

Outer Hair Cell ◽

Cell Damage ◽

Normal Hearing ◽

Outer Hair Cells ◽

Sensory Loss ◽

Distortion Product ◽

Hair Cell Damage

Percussionists can be exposed to intermittent sound stimuli that exceed 145 dB SPL, although damage may occur to the outer hair cells at levels of 120 dB SPL. The present study measured distortion-product otoacoustic emissions (DPOAEs) in a group of 86 normal-hearing percussionists and 39 normal-hearing nonpercussionists. Results indicate that normal-hearing percussionists have lower DPOAE amplitudes than normal-hearing nonpercussionists. DPOAE amplitudes were significantly lower at 6000 Hz in both the left and right ears for percussionists. Percussionists also more frequently had absent DPOAEs, with the greatest differences occurring at 6000 Hz (absent DPOAEs in 25% of percussionists vs 10% of nonpercussionists). When all frequencies are considered as a group, 33% of the percussionists had an absent DPOAE in either ear at some frequency, compared to only 23% of the nonpercussionists. Otoacoustic emissions are more sensitive to outer hair cell damage than pure-tone threshold measurements and can serve as an important measurement of sensory loss (i.e., outer hair cell damage) in musicians before the person perceives the hearing loss. DPOAE monitoring for musicians, along with appropriate education and intervention, might help prevent or minimize music-induced hearing loss.

Download Full-text

Contralateral suppression of linear and nonlinear transient evoked otoacoustic emissions in neonates at risk for hearing loss

Journal of Communication Disorders ◽

10.1016/j.jcomdis.2007.05.001 ◽

2008 ◽

Vol 41 (1) ◽

pp. 70-83 ◽

Cited By ~ 15

Author(s):

Alessandra Spada Durante ◽

Renata Mota Mamede Carvallo

Keyword(s):

At Risk ◽

Hearing Loss ◽

Otoacoustic Emissions ◽

Transient Evoked Otoacoustic Emissions ◽

Contralateral Suppression ◽

Nonlinear Transient ◽

Linear And Nonlinear

Download Full-text

Transient-Evoked Otoacoustic Emissions in Children after Cisplatin Chemotherapy

Otolaryngology ◽

10.1177/019459989811800504 ◽

1998 ◽

Vol 118 (5) ◽

pp. 584-588 ◽

Cited By ~ 1

Author(s):

Gregory C. Allen ◽

Christopher Tiu ◽

Kazunari Koike ◽

A. Kim Ritchey ◽

Marcia Kurs-Lasky ◽

...

Keyword(s):

Hearing Loss ◽

Middle Ear ◽

Cumulative Dose ◽

Otoacoustic Emissions ◽

Pediatric Patients ◽

Otoacoustic Emission ◽

Transient Evoked Otoacoustic Emissions ◽

Middle Ear Pressure ◽

High Cumulative Dose ◽

Middle Ear Disease

Little is known about cisplatin ototoxicity in pediatric patients. Measurement of otoacoustic emissions is a rapid, reproducible, objective method of evaluating hearing. We examined whether transient-evoked otoacoustic emissions in pediatric patients exposed to cisplatin in the past correlated with audiographic findings. Twelve patients were entered into the study (mean age at treatment 7.8 years, mean cumulative dose 442.5 mg/mm2, mean 7.1 doses). Hearing at 3000 Hz was preserved in 82.6% of patients. In the higher frequencies significant sensorineural hearing loss was noted: 43.5% at 4 kHz; 81.0% at 6 kHz; and 90.5% at 8 kHz. Transient-evoked otoacoustic emissions were measurable in 11 of 12 patients. Middle ear disease accounted for abnormal otoacoustic emission seen in three patients (1 with effusion, 2 with significant negative middle ear pressure). When the middle ear was normal, a statistically significant correlation was seen between the transient-evoked otoacoustic emissions reproducibility and pure-tone threshold (correlation coefficient = −0.69, p = 0.008). Increased hearing loss was also associated with young age at first dose of cisplatin ( p = 0.044), high number of chemotherapy cycles ( p = 0.042), and high cumulative dose ( p = 0.042). (Otolaryngol Head Neck Surg 1998;118:584–8.)

Download Full-text