OBJECTIVE: To compare the outcomes (auditory threshold and open-set speech perception at 48-month follow-up) of a new near-field monitoring procedure, electrical compound action potential, on positioning the auditory brainstem implant electrode array on the surface of the cochlear nuclei versus the traditional far-field electrical auditory brainstem response. STUDY DESIGN: Retrospective study. SETTING: Tertiary referral center. SUBJECTS AND METHODS: Among the 202 patients with auditory brainstem implants fitted and monitored with electrical auditory brainstem response during implant fitting, 9 also underwent electrical compound action potential recording. These subjects were matched retrospectively with a control group of 9 patients in whom only the electrical auditory brainstem response was recorded. Electrical compound action potentials were obtained using a cotton-wick recording electrode located near the surface of the cochlear nuclei and on several cranial nerves. RESULTS: Significantly lower potential thresholds were observed with the recording electrode located on the cochlear nuclei surface compared with the electrical auditory brainstem response (104.4 ± 32.5 vs 158.9 ± 24.2, P = .0030). Electrical brainstem response and compound action potentials identified effects on the neighboring cranial nerves on 3.2 ± 2.4 and 7.8 ± 3.2 electrodes, respectively (P = .0034). Open-set speech perception outcomes at 48-month follow-up had improved significantly in the near- versus far-field recording groups (78.9% versus 56.7%; P = .0051). CONCLUSIONS: Electrical compound action potentials during auditory brainstem implantation significantly improved the definition of the potential threshold and the number of auditory and extra-auditory waves generated. It led to the best coupling between the electrode array and cochlear nuclei, significantly improving the overall open-set speech perception.

Improved outcomes in auditory brainstem implantation with the use of near-field electrical compound action potentials / M. Mandalà, L. Colletti, G. Colletti, V. Colletti. - In: OTOLARYNGOLOGY-HEAD AND NECK SURGERY. - ISSN 0194-5998. - 151:6(2014), pp. 1008-1013.

Improved outcomes in auditory brainstem implantation with the use of near-field electrical compound action potentials

L. Colletti;G. Colletti;
2014

Abstract

OBJECTIVE: To compare the outcomes (auditory threshold and open-set speech perception at 48-month follow-up) of a new near-field monitoring procedure, electrical compound action potential, on positioning the auditory brainstem implant electrode array on the surface of the cochlear nuclei versus the traditional far-field electrical auditory brainstem response. STUDY DESIGN: Retrospective study. SETTING: Tertiary referral center. SUBJECTS AND METHODS: Among the 202 patients with auditory brainstem implants fitted and monitored with electrical auditory brainstem response during implant fitting, 9 also underwent electrical compound action potential recording. These subjects were matched retrospectively with a control group of 9 patients in whom only the electrical auditory brainstem response was recorded. Electrical compound action potentials were obtained using a cotton-wick recording electrode located near the surface of the cochlear nuclei and on several cranial nerves. RESULTS: Significantly lower potential thresholds were observed with the recording electrode located on the cochlear nuclei surface compared with the electrical auditory brainstem response (104.4 ± 32.5 vs 158.9 ± 24.2, P = .0030). Electrical brainstem response and compound action potentials identified effects on the neighboring cranial nerves on 3.2 ± 2.4 and 7.8 ± 3.2 electrodes, respectively (P = .0034). Open-set speech perception outcomes at 48-month follow-up had improved significantly in the near- versus far-field recording groups (78.9% versus 56.7%; P = .0051). CONCLUSIONS: Electrical compound action potentials during auditory brainstem implantation significantly improved the definition of the potential threshold and the number of auditory and extra-auditory waves generated. It led to the best coupling between the electrode array and cochlear nuclei, significantly improving the overall open-set speech perception.
auditory brainstem implant; electrical auditory brainstem response; electrical compound action potentials; intraoperative monitoring; Acoustic Stimulation; Adult; Aged; Auditory Brain Stem Implantation; Auditory Threshold; Case-Control Studies; Female; Follow-Up Studies; Humans; Male; Middle Aged; Monitoring, Intraoperative; Quality Improvement; Retrospective Studies; Risk Assessment; Speech Perception; Statistics, Nonparametric; Tertiary Care Centers; Time Factors; Treatment Outcome; Young Adult; Action Potentials; Auditory Brain Stem Implants; Electric Stimulation; Otorhinolaryngology; 2734; Pathology and Forensic Medicine; Surgery; Medicine (all)
Settore MED/50 - Scienze Tecniche Mediche Applicate
Settore MED/32 - Audiologia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/563822
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