Nemati Sh, Amiridavan M, Jamshidi M, Saberi A, Majlesi A,
Volume 65, Issue 4 (7-2007)
Abstract
Background: Sudden sensorinueural hearing loss (SSNHL) is a baffling condition for patients, and its etiology, audiologic characteristics, prognostic factors, and treatment are still controversial.
Methods: In this prospective study, we performed pure tone audiometry (PTA), impedance acoustics (IA), auditory brainstem responses (ABR), otoacoustic emissions (OAE), and transiently evoked otoacoustic emissions (TEOAE) before beginning treatment for 53 patients with SSNHL. We then entered each patient, randomly and alternately, in one of two treatment groups: oral steroids + acyclovir vs. intravenous urographin.
Results: In 22 (41.5%) of the 53 patients (22 female, 31 male), we found negative or no signal to noise ratio and overall correlation in TEOAE. Furthermore, 26 cases (49%) had positive overall correlations less than 50%, and five cases (4.4%) had overall correlations >50%. Although 15 cases (28.3%) responded well, 20 cases (37.7%) showed only a partial response, and 18 cases (33.9%) had poor or no response to our treatment. The mean value for overall correlation in the three subgroups of patients (no response, partial response, and complete response) was -3.5% (±1/16%), + 11% (±1.99%), and +36.6% (±3.07%) respectively (P = 0.01). From 52 cases, 20 had no reproducible wave in ABR (38.5%), three cases had abnormal ABR with normal OAE, all of which responded completely to treatments. Thirteen cases had abnormal ABR and OAE, none of which responded to treatment, and six cases had normal ABR with abnormal OAE, which often responded to treatment.
Conclusions: ABR and OAE may be useful in the diagnosis of SSNHL and determining the site of such lesions as ischemia or neuropathy. The overall correlation (and S/N ratio) in TEOAE is a valuable prognostic factor in SSNHL.
Ali Zamani, Alireza Karimi, Mohsen Naseri, Elaheh Amini, Mohammad Milani, Amir Arvin Sazgar, Seyed Mousa Sadr Hosseini, Mohammad Sadeghi Hassan Abadi, Fatemeh Nayeri, Firouzeh Nili, Mamak Shariat, Mostafa Vasigh, Fariba Nasaj, Fatemeh Zamani, Narges Zamani,
Volume 68, Issue 1 (4-2010)
Abstract
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MicrosoftInternetExplorer4
Background: American pediatric Association proposes to
screen all neonates with Oto-Acoustic Emission (OAE). In developing countries, because of several limitations,
health policy makers recommend to screen only in high risk patients. This study is performed with the aim to screen
hearing loss in 950 high risk newborns hospitalized in hospitals
affiliated to Tehran University using the OAE test.
Methods: A total of 950 neonates hospitalized in the Neonatal and NICU wards of
Vali-e-Asr, Shariati, Medical Center and Bahrami Hospitals during the years 2004-2006 who
showed at least one risk factor using TEOAE hearing test were enrolled into this cross-sectional
descriptive analytical study and were diagnosed with mild deafness and total
deafness. Blood exchange due to hyperbillirubinemia, septicemia, congenital
heart disease, the fifth minute apgar scores below six, PROM more than six hours, epilepsia, need to NICU more than five hours, pneumonia and Oto-Toxic drugs
were considered as risk factors. Data was past medical history, current
disease, admission cause, sign & symptoms and complications of disease.
Results: Multivariate logistic regression and paired t-test
showed that blood exchange, low birth weight and low first minute Apgar scores
had the highest independent risk for hearing loss among newborn.
Conclusion: Despite of the low prevalence of neonatal hearing loss,
screening of hearing loss at early stages is important.
