Objective: To assess the efficacy and safety of a new atraumatic, self-retaining cranial nerve electrode for direct cochlear nerve monitoring during cerebellopontine angle surgery.
Study Design: Prospective clinical investigation.
Setting: The Skull Base Surgery Center at Kaiser Permanente, San Diego, a tertiary referral center for neurotologic and skull-base surgery within Southern California Permanente Medical Group.
Patients: Eighteen patients, with aidable preoperative hearing, underwent direct cochlear nerve monitoring with this new electrode during cerebellopontine angle surgery for a variety of diagnoses.
Methods: Intraoperative observations of cochlear nerve action potential amplitude and latency were recorded. Preoperative and 1-month postoperative audiograms were compared to assess the degree of hearing preservation. Postoperative facial nerve function was assessed using the House-Brackmann method.
Results: Good auditory function was preserved in four of eight acoustic tumors, with poor hearing preserved in two additional patients. Good auditory function was preserved in the remaining ten patients. Cochlear nerve action potential amplitudes between 5 and 70 microV were recorded. Postoperative facial nerve function was House-Brackmann class I-II in all 18 patients.
Conclusion: The authors find this new electrode to be safe and effective for monitoring cochlear nerve function during cerebellopontine angle surgery.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Long-Term Outcomes of Jugular Paragangliomas Undergoing Gamma Knife Radiosurgery: A Single Center Experience.
Neurosurgery
January 2025
Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.
Background And Objectives: Jugular paragangliomas (JPG) pose a surgical challenge because of their vascularity and complex location. Stereotactic radiosurgery (SRS) offers a minimally invasive management for patients with JPG. Our aim was to evaluate outcomes of Gamma Knife radiosurgery (GKRS) for the treatment of JPG over the long term.
View Article and Find Full Text PDFMachine-Learning Predictions of Cochlear Implant Functional Outcomes: A Systematic Review.
Ear Hear
January 2025
San Francisco Department of Otolaryngology - Head and Neck Surgery, University of California, San Francisco, California, USA.
Objectives: Cochlear implant (CI) user functional outcomes are challenging to predict because of the variability in individual anatomy, neural health, CI device characteristics, and linguistic and listening experience. Machine learning (ML) techniques are uniquely poised for this predictive challenge because they can analyze nonlinear interactions using large amounts of multidimensional data. The objective of this article is to systematically review the literature regarding ML models that predict functional CI outcomes, defined as sound perception and production.
View Article and Find Full Text PDFWnt signalling facilitates neuronal differentiation of cochlear Frizzled10-positive cells in mouse cochlea via glypican 6 modulation.
Cell Commun Signal
January 2025
Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan, 250022, China.
Degeneration of cochlear spiral ganglion neurons (SGNs) leads to irreversible sensorineural hearing loss (SNHL), as SGNs lack regenerative capacity. Although cochlear glial cells (GCs) have some neuronal differentiation potential, their specific identities remain unclear. This study identifies a distinct subpopulation, Frizzled10 positive (FZD10+) cells, as an important type of GC responsible for neuronal differentiation in mouse cochlea.
View Article and Find Full Text PDFIntroduction: Neurotrophic factors are widely known for their protective effect on spiral ganglion neurons (SGN) and the protection of these neurons is of great importance to optimize Cochlear Implants, which directly stimulate SGN in deaf patients. Previous studies have identified Cometin - also known as Meteroin-like - to be neuroprotective and beneficial for metabolic disorders. The aim of our study was to investigate the effects of different concentrations of recombinant human Cometin (hCometin) on SGN in regard to neuroprotection and neurite outgrowth and to evaluate its neurite guidance potential using a neurite outgrowth chamber.
View Article and Find Full Text PDFUltra-high-resolution CT of the temporal bone before cochlear implantation for pre-operative prediction of chorda tympani nerve management and round window access.
Eur Arch Otorhinolaryngol
January 2025
Guilloz Imaging Department, Central Hospital, University Hospital Center of Nancy, Nancy, 54000, France.
Background And Purpose: To evaluate various anatomical parameters and their relationship to chorda tympani nerve (CTN) injury and round window (RW) access during cochlear implantation.
Materials And Methods: Ultra-high-resolution CT images of 66 patients were retrospectively reviewed and compared with operative reports. The facial recess and the round window were analyzed, mainly using the chorda-facial angle (CFA), the width of the facial recess, the CTN-tympanic annulus distance, the RW-mastoid portion of the facial nerve angle, and the type of RW.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!