کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6213991 1606024 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Auditory brainstem responses to broad-band chirps: Amplitude growth functions in sedated and anaesthetised infants
ترجمه فارسی عنوان
پاسخ شنوایی مغزی به تراشه های باند بالا: توابع رشد آمپول در نوزادان آرام و بیهوش شده
کلمات کلیدی
پاسخ شنوایی مغز محرک چیپ، آستانه شنیدن هدف سنجی، ملات هیدرات کلرال، بیهوشی عمومی،
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی بیماری های گوش و جراحی پلاستیک صورت
چکیده انگلیسی

ObjectiveRecently an optimized broad-band chirp stimulus has been proposed for the objective estimation of hearing thresholds with auditory brainstem responses (ABRs). Several studies have demonstrated that this stimulus, compensating for the travelling wave delay of the frequency components of a click stimulus at the basilar membrane, evokes larger ABR amplitudes in adults. This study analyses the amplitude of chirp-evoked ABRs recorded in infants below 48 month of age under clinical conditions and compares these results with literature data.MethodsChirp-evoked ABR recordings in 46 infants under chloral hydrate sedation or general anaesthesia were analysed retrospectively. The amplitude of the wave V was measured as a function of the stimulus intensity. To compare ABR amplitudes across infants with different hearing losses, the stimulus intensity was readjusted to the subjects' individual physiological threshold in dB SL (sensation level). Individual wave V amplitudes were plotted against stimulus intensity and individual amplitude growth functions were calculated. To investigate the maturation of chirp-evoked ABR, data from infants below and above 18 months of age were analysed separately.ResultsChirp-evoked ABR amplitudes in both age groups were larger than the click-evoked ABR amplitudes in young infants from the literature. Amplitudes of chirp-evoked ABR in infants above 18 months of age were not substantially smaller than those reported for normal hearing adults. Amplitudes recorded in infants below 18 months were significantly smaller than those in infants above 18 months. A significant difference between chirp-evoked ABR amplitudes recorded in sedation or under general anaesthesia was not found.ConclusionsThe higher amplitudes of ABR elicited by a broadband chirp stimulus allow for a reduction of the recording time in young infants.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Pediatric Otorhinolaryngology - Volume 77, Issue 1, January 2013, Pages 49-53
نویسندگان
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