Sealing of the Round Window Reversibly Affects Auditory Brainstem Response Latencies

ORL ◽  
1990 ◽  
Vol 52 (2) ◽  
pp. 80-85 ◽  
Author(s):  
Odd Spandow ◽  
Matti Anniko ◽  
Age R. Möller
Keyword(s):  
Auditory Brainstem Response ◽  
Round Window ◽  
Auditory Brainstem ◽  
Response Latencies ◽  
Brainstem Response

scholarly journals The Auditory Brainstem Response: Latencies Obtained in Children While under General Anesthesia

2012 ◽  
Vol 23 (01) ◽  
pp. 057-063 ◽  
Author(s):  
Linda W. Norrix ◽  
Stacey Trepanier ◽  
Matthew Atlas ◽  
Darlyne Kim
Keyword(s):  
General Anesthesia ◽  
Auditory Brainstem Response ◽  
Auditory Brainstem ◽  
Control Group ◽  
Neural Function ◽  
General Anesthetic ◽  
Response Latencies ◽  
Hearing Sensitivity ◽  
Brainstem Response ◽  
Group Delays

Background: The auditory brainstem response (ABR) test is frequently employed to estimate hearing sensitivity and assess the integrity of the ascending auditory system. In persons who cannot participate in conventional tests of hearing, a short-acting general anesthetic is used, recordings are obtained, and the results are compared with normative data. However, several factors (e.g., anesthesia, temperature changes) can contribute to delayed absolute and interpeak latencies, making it difficult to evaluate the integrity of the person's auditory brainstem function. Purpose: In this study, we investigated the latencies of ABR responses in children who received general anesthesia. Research Design: Between subject. Study Sample: Twelve children between the ages of 29 and 52 mo, most of whom exhibited a developmental delay but normal peripheral auditory function, comprised the anesthesia group. Twelve participants between the ages of 13 and 26 yr with normal hearing thresholds comprised the control group. Data Collection and Analysis: ABRs from a single ear from children, recorded under general anesthesia, were retrospectively analyzed and compared to those obtained from a control group with no anesthesia. ABRs were generated using 80 dB nHL rarefaction click stimuli. T-tests, corrected for alpha slippage, were employed to examine latency differences between groups. Results: There were significant delays in latencies for children evaluated under general anesthesia compared to the control group. Delays were observed for wave V and the interpeak intervals I–III, III–V, and I–V. Conclusions: Our data suggest that caution is needed in interpreting neural function from ABR data recorded while a child is under general anesthesia.

scholarly journals Electrically Evoked Auditory Brainstem Response over Round Window by Bipolar Stimulation

2019 ◽  
Vol 14 (3) ◽  
pp. 370-374
Author(s):  
Noelia Munoz Fernandez ◽  
◽  
Carlos de Paula Vernetta ◽  
Laura Cavalle Garrido ◽  
Miguel Diaz Gomez ◽  
...  
Keyword(s):  
Auditory Brainstem Response ◽  
Round Window ◽  
Auditory Brainstem ◽  
Bipolar Stimulation ◽  
Brainstem Response

Electrically Induced Auditory Brainstem Response as a Clinical Tool in Estimating Nerve Survival

1984 ◽  
Vol 93 (4_suppl) ◽  
pp. 97-100 ◽  
Author(s):  
F. Blair Simmons ◽  
Tom Meyers ◽  
Hugh S. Lusted ◽  
Clough Shelton
Keyword(s):  
Auditory Brainstem Response ◽  
Ganglion Cells ◽  
Round Window ◽  
Auditory Brainstem ◽  
Auditory Brainstem Responses ◽  
Scala Tympani ◽  
Clinical Tool ◽  
Large Populations ◽  
Brainstem Response ◽  
Better Than

Nerve survival estimates in totally deaf ears of cats and humans can be easily obtained by auditory brainstem responses to electrical stimulation at the round window. In humans, electrically induced auditory brainstem responses require considerably more current than concurrently observed perceptual thresholds and “maximum loudnesses,” and there is much variability from patient to patient. In cats, in which we also compared efficacy of stimulation sites, preliminary data analysis suggests that the scala tympani is clearly much more efficient than the round window, and the round window better than the promontory in ears with large populations of ganglion cells. In ears with no or nearly no ganglion cells, scala tympani and round window stimulations are about equal.

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