کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4106986 1605411 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Distortion product otoacoustic emissions in sheep before and after hyperinsulinemia induction
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی بیماری های گوش و جراحی پلاستیک صورت
پیش نمایش صفحه اول مقاله
Distortion product otoacoustic emissions in sheep before and after hyperinsulinemia induction
چکیده انگلیسی

SummaryTransient evoked otoacoustic emissions and distortion product otoacoustic emissions have gained significant importance in the identification of cochlear alterations.AimTo record distortion product thresholds through the monitoring of otoacoustic emissions in normal conditions and in the presence of electrophysiologic changes in cochlear outer hair cells in sheep after hyperinsulinemia induction.Material and methodsExperimental study, with seven sheep in the control group and seven in the study group. Insulin and glucose concentrations were measured simultaneously for the recording of distortion product otoacoustic emission every 10 minutes, all the way to 90 minutes. The control group received saline solution, and the study group received a bolus injection of 0.1 U/kg of regular human insulin.ResultsThere was a significant reduction in distortion product thresholds in the study group when compared to the control group at frequencies greater than 1,500Hz and after 60 minutes (P < 0.001).ConclusionThis study established distortion product otoacoustic emission thresholds in sheep with constant reproducibility, demonstrating that the method is adequate for use in audiology and otology investigations. Results also fully confirm that acute hyperinsulinemia may cause important changes in these thresholds.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brazilian Journal of Otorhinolaryngology - Volume 74, Issue 2, March–April 2008, Pages 181–187
نویسندگان
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