scholarly journals Examination and Comparison of Electrically Evoked Compound Action Potentials and Electrically Evoked Auditory Brainstem Response Results of Children with Cochlear Implantation without Inner Ear Anomaly

2019 ◽  
Vol 57 (2) ◽  
pp. 81-85
Author(s):  
Seda Bayrak ◽  
◽  
Basak Mutlu ◽  
Gunay Kirkim ◽  
Bulent Serbetcioglu ◽  
...  
Keyword(s):  
Inner Ear ◽  
Cochlear Implantation ◽  
Auditory Brainstem Response ◽  
Action Potentials ◽  
Auditory Brainstem ◽  
Compound Action Potentials ◽  
Brainstem Response ◽  
Inner Ear Anomaly ◽  
Compound Action

Temporal bone pathology of acoustic neuroma correlating with presence of electrocochleography and absence of auditory brainstem response

1997 ◽  
Vol 111 (10) ◽  
pp. 967-972 ◽  
Author(s):  
Kimitaka Kaga ◽  
Shinichi Iwasaki ◽  
Akira Tamura ◽  
Jun-Ichi Suzuki ◽  
Hideyuki Haebara
Keyword(s):  
Temporal Bone ◽  
Vestibular Schwannoma ◽  
Auditory Brainstem Response ◽  
Action Potentials ◽  
Auditory Brainstem ◽  
Cochlear Nerve ◽  
Bone Pathology ◽  
Compound Action Potentials ◽  
Brainstem Response ◽  
Compound Action

AbstractThe temporal bone pathology of a 74-year-old female affected by vestibular schwannoma was compared with findings of auditory brainstem response and electrocochleography. At age 71, she complained of hearing loss in the left ear in which pure tone audiometry revealed threshold elevation in the middle- and high-frequency range. Temporal bone CT scanning revealed a medium-sized cerebellopontine angle tumour in the left ear. ABR showed no response in the left ear, but the electrocochleography showed clear compound action potentials. Three years later, at age 74, she died of metastatic lung cancer and sepsis. The left temporal bone pathology consisted primarily of a large vestibular schwannoma occupying the internal auditory meatus. The organ of Corti was well preserved in each turn. In the modiolus, the numbers of spiral ganglion cells and cochlear nerve fibres in each turn were decreased. These histological findings suggest that clear compound action potentials were recorded from the distal portion of the cochlear nerve in spite of the presence of the vestibular schwannoma, but ABR could not be detected because of the blockade of the proximal portion of the cochlear nerve by the vestibular schwannoma.

Role of Electrically Evoked Auditory Brainstem Response in Cochlear Implantation of Children With Inner Ear Malformations

2008 ◽  
Vol 29 (5) ◽  
pp. 626-634 ◽  
Author(s):  
Ana H. Kim ◽  
Paul R. Kileny ◽  
H. Alexander Arts ◽  
Hussam K. El-Kashlan ◽  
Steven A. Telian ◽  
...  
Keyword(s):  
Inner Ear ◽  
Cochlear Implantation ◽  
Auditory Brainstem Response ◽  
Auditory Brainstem ◽  
Inner Ear Malformations ◽  
Ear Malformations ◽  
Brainstem Response

scholarly journals Effect of Depth of Total Intravenous General Anesthesia on Intraoperative Electrically Evoked Compound Action Potentials in Cochlear Implantation Surgery

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Ala”a Alhowary ◽  
Abdelwahab Aleshawi ◽  
Obada Alali ◽  
Manal Kassab ◽  
Diab Bani Hani ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Action Potentials ◽  
Compound Action Potential ◽  
Cochlear Implant Surgery ◽  
Compound Action Potentials ◽  
Evoked Compound Action Potential ◽  
Electrode Lead ◽  
Intravenous General Anesthesia ◽  
Compound Action

Purpose. This study aims to compare the effect of the depth of total intravenous anesthesia (TIVA) on intraoperative electrically evoked compound action potential (e-ECAP) thresholds in cochlear implant operations. Methods. Prospectively, a total of 39 patients aged between 1 and 48 years who were scheduled to undergo cochlear implantation surgeries were enrolled in this study. Every patient received both light and deep TIVA during the cochlear implant surgery. The e-ECAP thresholds were obtained during the light and deep TIVA. Results. After comparing the e-ECAP means for each electrode (lead) between the light and deep anesthesia, no significant differences were detected between the light and deep anesthesia. Conclusion. The depth of TIVA may have no significant influence on the e-ECAP thresholds as there was no statistical difference between the light and deep anesthesia.

Cochlear Implantation with the CI512 and CI532 Precurved Electrode Arrays: One-Year Speech Recognition and Intraoperative Thresholds of Electrically Evoked Compound Action Potentials

2019 ◽  
Vol 24 (6) ◽  
pp. 299-308 ◽  
Author(s):  
Pernilla Videhult Pierre ◽  
Martin Eklöf ◽  
Henrik Smeds ◽  
Filip Asp
Keyword(s):  
Speech Recognition ◽  
Cochlear Implantation ◽  
Action Potentials ◽  
Electrode Array ◽  
University Hospital ◽  
Electrode Arrays ◽  
Neural Response Telemetry ◽  
Significant Difference ◽  
Compound Action Potentials ◽  
Compound Action

Introduction: Precurved cochlear implant (CI) electrode arrays were developed in an attempt to improve the auditory outcome of cochlear implantation, which varies greatly. The recent CI532 (Cochlear Corp., Sydney, Australia) may offer further advantages as its electrode array is thinner than previous precurved CI electrode arrays. The aims here were to investigate 1-year postoperative speech recognition, intraoperative electrically evoked compound action potentials (ECAPs), and their possible relation in patients implanted with a CI532 or its predecessor CI512. Methods: A retrospective analysis of data from 63 patients subjected to cochlear implantation at the Karolinska University Hospital, Sweden, was performed. Speech recognition of the implanted ear was evaluated using phonemically balanced monosyllabic Swedish words at 65 dB SPL. ECAPs were evaluated using the intraoperative ECAP threshold across ≥8 electrodes generated by the automated neural response telemetry of the CI. Results: The median aided speech recognition score (SRS) 1 year after implantation was 52% (quartile 1 = 40%, quartile 3 = 60%, n = 63) and did not differ statistically significantly between patients with CI512 (n = 38) and CI532 (n = 25). The mean ECAP threshold was 188 CL (current level; SD = 15 CL, n = 54) intraoperatively and did not differ statistically significantly between patients with CI512 (n = 32) and CI532 (n = 22), but the threshold for each electrode varied more between patients with a CI512 (p < 0.0001). A higher mean ECAP threshold was associated with a worse SRS (Spearman’s ρ = –0.46, p = 0.0004, n = 54). The association remained among those with a CI512 (Spearman’s ρ = –0.62, p = 0.0001, n = 32) when stratified by CI electrode array. Conclusion: No statistically significant difference in speech recognition 1 year after cochlear implantation or in mean threshold of ECAP intraoperatively was found between patients with a CI512 and the more recent, slim CI532, but the ECAP thresholds varied more between those with a CI512. A statistically significant association between SRS and mean ECAP threshold was found, but stratified analysis suggests that the association may be true only for patients with a CI512.

Value of intracochlear electrically evoked auditory brainstem response after cochlear implantation in patients with narrow internal auditory canal

2010 ◽  
Vol 120 (8) ◽  
pp. 1625-1631 ◽  
Author(s):  
Mee Hyun Song ◽  
Mi Ran Bae ◽  
Hee Nam Kim ◽  
Won-Sang Lee ◽  
Won Sun Yang ◽  
...  
Keyword(s):  
Cochlear Implantation ◽  
Auditory Brainstem Response ◽  
Internal Auditory Canal ◽  
Auditory Brainstem ◽  
Brainstem Response

Cochlear implantation in auditory neuropathy spectrum disorders: role of transtympanic electrically evoked auditory brainstem responses and serial neural response telemetry

2021 ◽  
pp. 1-8
Author(s):  
S N Dutt ◽  
A Kumar ◽  
A A Mittal ◽  
S Vadlamani ◽  
S K Gaur
Keyword(s):  
Cochlear Implantation ◽  
Auditory Brainstem Response ◽  
Auditory Brainstem ◽  
Neural Response ◽  
Auditory Neuropathy ◽  
Auditory Brainstem Responses ◽  
Auditory Neuropathy Spectrum Disorder ◽  
Neural Response Telemetry ◽  
Brainstem Response ◽  
Response Testing

Abstract Objective To evaluate the utility of pre-operative transtympanic electrically evoked auditory brainstem responses and post-operative neural response telemetry in auditory neuropathy spectrum disorder patients. Methods Four auditory neuropathy spectrum disorder patients who had undergone cochlear implantation and used it for more than one year were studied. All four patients underwent pre-operative transtympanic electrically evoked auditory brainstem response testing, intra-operative and post-operative (at 3, 6 and 12 months after switch-on) neural response telemetry, and out-patient cochlear implant electrically evoked auditory brainstem response testing (at 12 months). Results Patients with better waveforms on transtympanic electrically evoked auditory brainstem response testing showed superior performance after one year of implant use. Neural response telemetry and electrically evoked auditory brainstem response measures improved in all patients. Conclusion Inferences related to cochlear implantation outcomes can be based on the waveform of transtympanic electrically evoked auditory brainstem responses. Robust transtympanic electrically evoked auditory brainstem responses suggest better performance. Improvements in electrically evoked auditory brainstem responses and neural response telemetry over time indicate that electrical stimulation is favourable in auditory neuropathy spectrum disorder patients. These measures provide an objective way to monitor changes and progress in auditory pathways following cochlear implantation.

Sign in / Sign up

Export Citation Format

Share Document