|
1
|
Scheperle R, Etler C, Oleson J, Dunn C, Kashani R, Claussen A, Gantz BJ, Hansen MR. Evaluation of Real-Time Intracochlear Electrocochleography for Guiding Cochlear Implant Electrode Array Position. J Clin Med 2023; 12:7409. [PMID: 38068461 PMCID: PMC10707171 DOI: 10.3390/jcm12237409] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/12/2023] [Accepted: 11/24/2023] [Indexed: 02/12/2024] Open
Abstract
This study evaluates intracochlear electrocochleography (ECochG) for real-time monitoring during cochlear implantation. One aim tested whether adjusting the recording electrode site would help differentiate between atraumatic and traumatic ECochG amplitude decrements. A second aim assessed whether associations between ECochG amplitude decrements and post-operative hearing loss were weaker when considering hearing sensitivity at the ECochG stimulus frequency compared to a broader frequency range. Eleven adult cochlear implant recipients who were candidates for electro-acoustic stimulation participated. Single-frequency (500-Hz) ECochG was performed during cochlear implantation; the amplitude of the first harmonic of the difference waveform was considered. Post-operative hearing preservation at 500 Hz ranged from 0 to 94%. The expected relationship between ECochG amplitude decrements and hearing preservation was observed, though the trend was not statistically significant, and predictions were grossly inaccurate for two participants. Associations did not improve when considering alternative recording sites or hearing sensitivity two octaves above the ECochG stimulus frequency. Intracochlear location of a moving recording electrode is a known confound to real-time interpretation of ECochG amplitude fluctuations, which was illustrated by the strength of the correlation with ECochG amplitude decrements. Multiple factors contribute to ECochG amplitude patterns and to hearing preservation; these results highlight the confounding influence of intracochlear recording electrode location on the ECochG.
Collapse
Affiliation(s)
- Rachel Scheperle
- Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA; (C.E.); (C.D.); (R.K.); (A.C.); (B.J.G.); (M.R.H.)
| | - Christine Etler
- Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA; (C.E.); (C.D.); (R.K.); (A.C.); (B.J.G.); (M.R.H.)
| | - Jacob Oleson
- Department of Biostatistics, University of Iowa, Iowa City, IA 52242, USA
| | - Camille Dunn
- Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA; (C.E.); (C.D.); (R.K.); (A.C.); (B.J.G.); (M.R.H.)
| | - Rustin Kashani
- Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA; (C.E.); (C.D.); (R.K.); (A.C.); (B.J.G.); (M.R.H.)
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA
| | - Alexander Claussen
- Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA; (C.E.); (C.D.); (R.K.); (A.C.); (B.J.G.); (M.R.H.)
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA
| | - Bruce J. Gantz
- Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA; (C.E.); (C.D.); (R.K.); (A.C.); (B.J.G.); (M.R.H.)
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA
| | - Marlan R. Hansen
- Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA; (C.E.); (C.D.); (R.K.); (A.C.); (B.J.G.); (M.R.H.)
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA
- Department of Molecular Physiology and Biophysics, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA
| |
Collapse
|