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Niemczyk K, Pobożny I, Bartoszewicz R, Morawski K. Intraoperative Hearing Monitoring Using ABR and TT-ECochG and Hearing Preservation during Vestibular Schwannoma Resection. J Clin Med 2024; 13:4230. [PMID: 39064270 PMCID: PMC11278406 DOI: 10.3390/jcm13144230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 07/28/2024] Open
Abstract
Background: Quick and appropriate diagnostics and the use of intraoperative monitoring (IM) of hearing during vestibular schwannoma (VS) resection increase the likelihood of hearing preservation. During surgery, various methods of IM can be used, i.e., auditory brainstem responses (ABRs), transtympanic electrocochleography (TT-ECochG), and direct cochlear nerve action potentials. The aim of the study was to evaluate the prognostic values of IM of hearing using ABR and TT-ECochG in predicting postoperative hearing preservation and to evaluate relationships between them during various stages of surgery. Methods: This retrospective study presents the pre- and postoperative audiological test results and IM of hearing records (TT-ECochG and ABR) in 75 (43 women, 32 men, aged 18-69) patients with diagnosed VS. Results: The preoperative pure tone average hearing threshold was 25.02 dB HL, while after VS resection, it worsened on average by 30.03 dB HL. According to the American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS) Hearing Classification, before and after (pre/post) surgery, there were 47/24 patients in hearing class A, 9/8 in B, 2/1 in C, and 17/42 in D. In speech audiometry, the average preoperative speech discrimination score at an intensity of 60 dB SPL was 70.93%, and after VS resection, it worsened to 38.93%. The analysis of electrophysiological tests showed that before the tumor removal the I-V ABR interlatencies was 5.06 ms, and after VS resection, it was 6.43 ms. Conclusions: The study revealed correlations between worse postoperative hearing and changes in intraoperatively measured ABR and TT-ECochG. IM of hearing is very useful in predicting postoperative hearing in VS patients and increases the chance of postoperative hearing preservation in these patients.
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Affiliation(s)
- Kazimierz Niemczyk
- Department of Otorhinolaryngology Head and Neck Surgery, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Izabela Pobożny
- Department of Otorhinolaryngology Head and Neck Surgery, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Robert Bartoszewicz
- Department of Otorhinolaryngology Head and Neck Surgery, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Krzysztof Morawski
- Department of Otorhinolaryngology, Institute of Medical Sciences, University of Opole, 45-040 Opole, Poland
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Khan MM, Dutta A, Rajappa D, Mallik D, Baldoncini M, Rangel CC, Chaurasia B. Facial nerve electrical motor evoked potential in cerebellopontine angle tumors for its anatomical and functional preservation. Surg Neurol Int 2024; 15:182. [PMID: 38840594 PMCID: PMC11152508 DOI: 10.25259/sni_14_2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 05/09/2024] [Indexed: 06/07/2024] Open
Abstract
Background Among the technical measures to preserve facial nerve (FN) function, intraoperative neuromonitoring has become mandatory and is constantly being scrutinized. Hence, to determine the efficacy of FN motor evoked potentials (FNMEPs) in predicting long-term motor FN function following cerebellopontine angle (CPA) tumor surgery, an analysis of cases was done. Methods In 37 patients who underwent CPA surgery, FNMEPs through corkscrew electrodes positioned at C5-C6 and C6-C5 (C is the central line of the brain as per 10-20 EEG electrode placement) were used to deliver short train stimuli and recorded from the orbicularis oculi, oris, and mentalis muscles. Results In 58 patients, triggered electromyography (EMG) was able to identify the FN during resection of tumor, but 8 out of these (4.64%) patients developed new facial weakness, whereas 3 out of 38 (1.11%) patients who had intact FN function MEP (decrement of FN target muscles - CMAPs amplitude peak to peak >50-60%), developed new facial weakness (House and Brackmann grade II to III). Conclusion The FNMEP has significant superiority over triggered EMG when tumor is giant and envelops the FN.
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Affiliation(s)
| | - Abinash Dutta
- Department of Neurosurgery, Sakra World Hospital, Bengaluru, Karnataka, India
| | - Deepak Rajappa
- Department of Neurosurgery, Sakra World Hospital, Bengaluru, Karnataka, India
| | - Dattatraya Mallik
- Department of Neurosurgery, Sakra World Hospital, Bengaluru, Karnataka, India
| | - Matias Baldoncini
- Department of Neurosurgery, San Fernando Hospital, San Fernando, Argentina
| | - Carlos Castillo Rangel
- Department of Neurosurgery, Institute de Seguridad y Servicios Sociales de los Trabajadores Del Estrado, Mexico City, Mexico
| | - Bipin Chaurasia
- Department of Neurosurgery, Neurosurgery Clinic,Birgunj,Nepal
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Kosaraju N, Moore LS, Mulders JY, Blevins NH. Sporadic vestibular schwannoma in a pediatric population: a case series. Childs Nerv Syst 2024; 40:635-645. [PMID: 37889276 DOI: 10.1007/s00381-023-06184-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/10/2023] [Indexed: 10/28/2023]
Abstract
PURPOSE To describe the characteristics, management, and outcomes of pediatric patients with sporadic vestibular schwannoma (sVS). METHODS This was a case series at a tertiary care center. Patients were identified through a research repository and chart review. Interventions were microsurgery, stereotactic radiosurgery (SRS), and observation. Outcome measures were tumor control, facial nerve function, and hearing. RESULTS Eight patients over 2006-2022 fulfilled inclusion criteria (unilateral VS without genetic or clinical evidence of neurofibromatosis type 2 (NF2); age ≤ 21) with a mean age of 17 years (14-20). Average greatest tumor length in the internal auditory canal was 9.7 mm (4.0-16.1). Average greatest tumor dimension (4/8 tumors) in the cerebellopontine angle was 19.1 mm (11.3-26.8). Primary treatment was microsurgery in five (62.5%) patients, observation in two (25%), and SRS in one (12.5%). Four (80%) surgical patients had gross total resections, and one (20%) had regrowth post-near total resection and underwent SRS. One observed patient and the primary SRS patient have remained radiographically stable for 3.5 and 7 years, respectively. The other observed patient required surgery for tumor growth after 12 months of observation. Two surgical patients had poor facial nerve outcomes. All post-procedural patients developed anacusis. Mean follow-up was 3 years (0.5-7). CONCLUSIONS We describe one of the largest reported cohorts of pediatric sVS in the USA. Diligent exclusion of NF2 is critical. Given the high likelihood of eventually requiring intervention and known adverse effects of SRS, microsurgery remains the preferred treatment. However, observation can be considered in select situations.
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Affiliation(s)
- Nikitha Kosaraju
- Division of Otology/Neurotology, Department of Otolaryngology - Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Rd, Palo Alto, Stanford, CA, 94305-5739, USA
- David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Lindsay S Moore
- Division of Otology/Neurotology, Department of Otolaryngology - Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Rd, Palo Alto, Stanford, CA, 94305-5739, USA
| | - Jip Y Mulders
- Division of Otology/Neurotology, Department of Otolaryngology - Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Rd, Palo Alto, Stanford, CA, 94305-5739, USA
- Leiden University Medical Center, Leiden, The Netherlands
| | - Nikolas H Blevins
- Division of Otology/Neurotology, Department of Otolaryngology - Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Rd, Palo Alto, Stanford, CA, 94305-5739, USA.
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Li X, Liang J, Song G, Jiao H. Using a Facial Nerve Stimulator to Record the Auditory Nerve Compound Action Potential to Locate the Auditory Nerve During Vestibular Schwannoma Resection. World Neurosurg 2023; 175:e582-e592. [PMID: 37030482 DOI: 10.1016/j.wneu.2023.03.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 03/31/2023] [Indexed: 04/10/2023]
Abstract
BACKGROUND Improved technology in vestibular neuroma resection and facial nerve protection has become more sophisticated, and the protection of hearing during vestibular schwannoma resection is crucial. Currently, brainstem auditory evoked potential (BAEP), cochlear electrography, and cochlear nerve compound action potential (CNAP) are frequently used. The CNAP waveform is stable; however, the recording electrode can easily affect the procedure and cannot map the auditory nerve. The purpose of the study was to explore a simple method to record the CNAP and map the auditory nerve. METHODS In this study, CNAP was recorded using a facial nerve bipolar stimulator to localize and protect the auditory nerve. The BAEP click stimulation mode was used. A bipolar stimulator was used as the recording electrode to record CNAP and locate anatomical displacement of the auditory nerve. The CNAP of 40 patients was monitored. Pure tone audiometry, speech discrimination score, and auditory evoked potential (BAEP) evaluations were performed on all patients before and after surgery. RESULTS Of the 40 patients, 30 patients obtained CNAP during surgery, and the rate of CNAP obtained was significantly higher than that of BAEP. The sensitivity and specificity of decrease in CNAP in predicting significant hearing loss were 88.9% and 66.7%, respectively. The sensitivity and specificity of the disappearance of CNAP in predicting significant hearing loss were 52.9% and 92.3%, respectively. CONCLUSIONS The bipolar facial nerve stimulator can locate and protect the auditory nerve by recording a stable potential. The CNAP obtained rate was significantly higher than that of BAEP. The disappearance of BAEP during acoustic neuroma monitoring can be used as a standard alert for the surgeon, and decrease in CNAP is an alert for the operator.
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Affiliation(s)
- Xiaoyu Li
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, China International Neuroscience Institute (China-INI), Beijing, China
| | - Jiantao Liang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, China International Neuroscience Institute (China-INI), Beijing, China.
| | - Gang Song
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, China International Neuroscience Institute (China-INI), Beijing, China
| | - Hanyi Jiao
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, China International Neuroscience Institute (China-INI), Beijing, China
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Di Pasquale Fiasca VM, Tealdo G. Intraoperative Cochlear Nerve Monitoring in Cochlear Implantation after Vestibular Schwannoma Resection. Audiol Res 2023; 13:398-407. [PMID: 37366681 DOI: 10.3390/audiolres13030035] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 05/25/2023] [Accepted: 05/27/2023] [Indexed: 06/28/2023] Open
Abstract
BACKGROUND The use of a cochlear implant (CI) for hearing rehabilitation after vestibular schwannoma (VS) resection is widely spreading. The procedure is usually performed simultaneously to tumor resection with a translabyrinthine approach. To ensure the best device function, assessing the integrity of the cochlear nerve is of primary importance. METHODS A narrative review of the literature on the present topic was carried out up to June 2022. Finally, nine studies were considered. RESULTS Electrically evoked auditory brainstem responses (eABR) is the most widely used method of intraoperative monitoring of cochlear nerve (CN) during VS resection, although its limits are known. It can be assessed through the CI electrode array or through an intracochlear test electrode (ITE). Variations of the graph are evaluated during the surgical procedure, in particular the wave V amplitude and latency. As tumor dissection progresses, the parameters may change, informing of the CN status, and the surgical procedure may be modulated. CONCLUSION An eABR positive result seems to be reliably correlated with a good CI outcome in those cases in which a clear wave V is recorded before and after tumor removal. On the contrary, in those cases in which the eABR is lost or altered during the surgical procedure, the positioning of a CI is still debatable.
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Affiliation(s)
- Valerio Maria Di Pasquale Fiasca
- Section of Otolaryngology, Otolaryngology Unit, Department of Neurosciences, University of Padova, Via Giustiniani, 2, 35128 Padua, Italy
| | - Giulia Tealdo
- Section of Otolaryngology, Otolaryngology Unit, Department of Neurosciences, University of Padova, Via Giustiniani, 2, 35128 Padua, Italy
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Gazia F, Callejo À, Pérez-Grau M, Lareo S, Prades J, Roca-Ribas F, Amilibia E. Pre- and intra-operative prognostic factors of facial nerve function in cerebellopontine angle surgery. Eur Arch Otorhinolaryngol 2023; 280:1055-1062. [PMID: 35907000 PMCID: PMC9899719 DOI: 10.1007/s00405-022-07556-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 07/12/2022] [Indexed: 02/07/2023]
Abstract
PURPOSE The study assesses whether pre- and intraoperative factors linked to electromyography and direct electrical stimulation (DES) of facial nerve can predict facial nerve function in the short- (12 days) and long-term (1 year) after cerebellopontine angle (CPA) tumor resection. METHODS 157 patients who underwent surgical resection of CPA tumors with facial nerve monitoring. Pre-operative factors (age, tumor size, pure tone average), surgical time and intra-operative parameters regarding facial function, minimum stimulation threshold (MST), compound muscle action potential (CMAP) and the difference between proximal and distal CMAP (DPDC) were evaluated. RESULTS A correlation between tumor size, MST, CMAP and facial function in both short and long term was found. A higher grade of immediate facial paralysis corresponded to a higher risk of poor outcome after one year. A postoperative House-Brackmann (HB) score of V or VI was correlated with poor outcome in 88.8% and 93.8% of cases. A risk of HB 3 or more, in the long term, was correlated with a tumor size of 20.2 mm. Using an MST of 0.1 mA, for long-term predictions, sensitivity and specificity were 0.62 (95% CI 0.46-0.75) and 0.73 (95% CI 0.61-0.82), respectively. With a CMAP cut-off < 200 µV, for long-term prediction, sensitivity was 0.73 (95% CI 0.53-0.87) and specificity 0.73 (95% CI 0.55-0.85). CONCLUSION The assessment based on the cut-offs described increases the ability to predict facial function. Improving predictive accuracy enables surgeons to address patients' expectations and to establish an intervention timeline for planning facial reanimation.
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Affiliation(s)
- Francesco Gazia
- Department of Otorhinolaryngology, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona (UAB), Carretera del Canyet, Badalona, 08916, Barcelona, Spain
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", University of Messina, Messina, Italy
| | - Àngela Callejo
- Department of Otorhinolaryngology, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona (UAB), Carretera del Canyet, Badalona, 08916, Barcelona, Spain
| | - Marta Pérez-Grau
- Department of Otorhinolaryngology, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona (UAB), Carretera del Canyet, Badalona, 08916, Barcelona, Spain
| | - Susana Lareo
- Department of Otorhinolaryngology, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona (UAB), Carretera del Canyet, Badalona, 08916, Barcelona, Spain
| | - José Prades
- Department of Otorhinolaryngology, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona (UAB), Carretera del Canyet, Badalona, 08916, Barcelona, Spain
| | - Francesc Roca-Ribas
- Department of Otorhinolaryngology, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona (UAB), Carretera del Canyet, Badalona, 08916, Barcelona, Spain
| | - Emilio Amilibia
- Department of Otorhinolaryngology, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona (UAB), Carretera del Canyet, Badalona, 08916, Barcelona, Spain.
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Ren Y, Merna CM, Tawfik KO, Schwartz MS, Friedman RA. Auditory Brain Stem Response Predictors of Hearing Outcomes after Middle Fossa Resection of Vestibular Schwannomas. Skull Base Surg 2022; 83:496-504. [DOI: 10.1055/s-0040-1722718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 11/27/2020] [Indexed: 10/22/2022]
Abstract
Abstract
Objectives To analyze the relationship between preoperative and intraoperative auditory brain stem response (ABR) characteristics and hearing outcomes in patients with vestibular schwannomas (VS) undergoing hearing preservation (HP) surgery via a middle cranial fossa (MCF) approach.
Design Prospective study.
Setting Academic tertiary skull base referral center.
Methods Pre- and postoperative pure-tone average (PTA) and word recognition score (WRS) were examined. Intraoperative ABR wave III latency, wave V latency, and amplitude were recorded. HP was defined as postoperative WRS ≥50%.
Participants Adult patients with VS and WRS ≥50% who underwent MCF tumor resection between November 2017 and September 2019.
Main Outcome Measures Postoperative hearing outcomes.
Results Sixty patients were included. Mean tumor size was 9.2 mm (range, 3–17). HP rates were 56.7% for the cohort and 69.7% for tumors <10 mm. A complete loss of wave V was associated with an 82.9% increase in postoperative PTA (p < 0.001) and 97.2% decrease in WRS (p < 0.001), whereas a diminished wave V was correlated with 62.7% increase in PTA (p < 0.001) and 55.7% decrease in WRS (p = 0.006). A diminished or absent wave V, but not increased wave III/V latency or decreased wave V amplitude, was correlated with a decline in postoperative hearing class (r = 0.735, p < 0.001). Receiver-operating characteristic analysis demonstrated that a stable wave V has the highest accuracy in predicting HP (sensitivity of 82.6%, specificity of 84.8%).
Conclusion Of the examined preoperative and intraoperative ABR characteristics, a stable wave V intraoperatively was the strongest predictor of HP after MCF resection of VS.
Level of Evidence Level III.
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Affiliation(s)
- Yin Ren
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of California, San Diego, San Diego, California, United States
| | - Catherine M. Merna
- Department of Otolaryngology-Head and Neck Surgery, University of California, Irvine, Irvine, California, United States
| | - Kareem O. Tawfik
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of California, San Diego, San Diego, California, United States
- Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Marc S. Schwartz
- Division of Neurosurgery, Department of Surgery, University of California, San Diego, San Diego, California, United States
| | - Rick A. Friedman
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of California, San Diego, San Diego, California, United States
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López JR, Legatt AD. Monitoring surgery around the cranial nerves. HANDBOOK OF CLINICAL NEUROLOGY 2022; 186:319-351. [PMID: 35772894 DOI: 10.1016/b978-0-12-819826-1.00020-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Intraoperative neurophysiologic monitoring (IONM) of cranial nerve (CN) function is an essential component in multimodality monitoring of surgical procedures where CNs are at risk for injury. In most cases, IONM consists of localizing and mapping CNs and their pathways, and monitoring of CN motor function during surgery. However, CN VIII, which has no motor function, and is at risk for injury in many surgical procedures, can be easily and accurately monitored using brainstem auditory evoked potentials. For motor CNs, the literature is clear that function can be safely and adequately performed using basic electromyographic (EMG) techniques, such as recording of continuous EMG activity and electrically evoked compound muscle actions potentials. Newer techniques, such as corticobulbar motor evoked potentials and reflex studies, show good potential for a greater degree of functional assessment but require further study to determine their clinical utility. EMG remains the basic clinical neurophysiologic technique with the greatest clinical research supporting its utility in IONM of motor CN function and should be used as part of a comprehensive multimodality IONM protocol. Understanding the physiologic basis of EMG and the changes associated with altered motor function will allow the practitioner to alter surgical course to prevent injury and improve patient safety.
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Affiliation(s)
- Jaime R López
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, United States.
| | - Alan D Legatt
- Department of Neurology, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, NY, United States
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Wu Y, Wei C, Wang P, Zhang Y, Wu Y, Xue Y, Zhao T, Qu Y. Application of Subperineural Resection Technique in Vestibular Schwannomas: Surgical Efficacy and Outcomes in 124 patients. Front Oncol 2022; 12:849109. [PMID: 35592679 PMCID: PMC9113757 DOI: 10.3389/fonc.2022.849109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
Objective We aimed to explore the application and prospects of the subperineural resection technique for tumor separation and removal under the perineurium during surgery for vestibular schwannomas (VSs). Methods This study retrospectively analyzed 124 patients with VSs who underwent surgery via a retrosigmoid approach from July 2015 to October 2020 in the Department of Neurosurgery, Tangdu Hospital, Air Force Military Medical University. The data will be discussed with regard to the following aspects: clinical features, surgical strategies, tumor resection extent, facial–acoustic function preservation, and postoperative complications. Results Gross total resection (GTR) of the tumor was achieved in 104 patients, with a GTR rate of 83.9%, and subtotal resection (STR) of the tumor was achieved in 20 patients. There was no significant difference in facial and acoustic nerve functional preservation between GTR and STR, as well as in tumor resection between solid and cystic tumors. The retention rate reached 97.6% in terms of complete anatomical facial nerve preservation. Facial nerve function was assessed using the House–Brackmann (HB) grading score. Consequently, HB grades of I–II, III–IV, and V–VI were determined for 96 (77.4%), 25 (20.2%), and 3 (2.4%) cases, respectively, 1 week postoperatively and accounted for 110 cases (88.7%), 13 cases (10.5%), and 1 case (0.8%), respectively, at 6 months. Fifteen of 35 (42.9%) patients with serviceable hearing before the operation still had serviceable hearing at 6 months postoperatively. There were 5 cases of cerebellar or brainstem bleeding after the operation, and one patient died. Multivariate logistic regression analysis showed that older age (≥60 years, p = 0.011), large tumor (>3 cm, p = 0.004), and cystic tumor (p = 0.046) were independent risk factors associated with the extent of adhesion between the tumor and the brainstem and facial–acoustic nerve. Conclusion We successfully applied the subperineural resection technique to a large series of patients with VSs and achieved satisfactory results. Accurate identification of the perineurium and subperineural resection of the tumor can effectively reduce the disturbance of the facial–acoustic nerve during the operation and provide an intuitive basis for judging the tumor boundary. The subperineural resection technique may be conducive to improving the rate of total tumor resection and facial–acoustic nerve functional preservation in the surgical treatment of VSs.
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Affiliation(s)
- Yingxi Wu
- Department of Neurosurgery, Tangdu Hospital, The Air Force Medical University, Xi'an, China
| | - Chen Wei
- Department of Neurosurgery, Tangdu Hospital, The Air Force Medical University, Xi'an, China
| | - Ping Wang
- Department of Neurosurgery, Tangdu Hospital, The Air Force Medical University, Xi'an, China
| | - Yunze Zhang
- Department of Neurosurgery, Tangdu Hospital, The Air Force Medical University, Xi'an, China
| | - Yang Wu
- Department of Neurosurgery, Tangdu Hospital, The Air Force Medical University, Xi'an, China
| | - Yafei Xue
- Department of Neurosurgery, Tangdu Hospital, The Air Force Medical University, Xi'an, China
| | - Tianzhi Zhao
- Department of Neurosurgery, Tangdu Hospital, The Air Force Medical University, Xi'an, China
| | - Yan Qu
- Department of Neurosurgery, Tangdu Hospital, The Air Force Medical University, Xi'an, China
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Farag AA, Ibrahim AEKSED, Alaghory IM. Clinical Benefits of Facial Nerve Monitoring during Cerebellopontine Angle Surgery. OPEN JOURNAL OF MODERN NEUROSURGERY 2022; 12:9-27. [DOI: 10.4236/ojmn.2022.121002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Li X, Bao Y, Liang J, Chen G, Guo H, Li M. Electrophysiological mapping and assessment of facial nerve functioning during acoustic neuroma operations. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:405. [PMID: 33842626 PMCID: PMC8033303 DOI: 10.21037/atm-20-6858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background Electrophysiological monitoring is used routinely to protect the facial nerve during acoustic neuroma surgery. This study aimed to clarify the relationship between the facial nerve’s electrophysiological monitoring parameters and its function after surgery. Methods Fifty-two patients with acoustic neuroma who underwent surgery were included. After localizing the facial nerve, its monitoring results during surgeries performed at our center were analyzed. Postoperative nerve functioning was correlated with the stimulation threshold of the facial nerve’s proximal segment, proximal-to-distal amplitude ratio of the facial nerve, and proximal stimulation amplitude. Receiver-operating characteristic curves of the three parameters were calculated. Results Electrical stimulation accurately described the facial nerve’s anatomic distribution after the depth of anesthesia was assessed via accessory nerve stimulation. The data recorded after resection showed that a higher proximal-to-distal amplitude ratio was associated with better facial nerve functioning (P=0.037). A lower stimulation threshold of the proximal segment correlated with better facial nerve functioning (P=0.038). Conclusions The most sensitive index to predict postoperative nerve functioning is the facial nerve’s proximal-to-distal amplitude ratio. Accessory nerve stimulation can determine the appropriate depth of anesthesia, Electromyography (EMG) monitoring of the facial nerve during acoustic neuroma surgery can protect it effectively.
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Affiliation(s)
- Xiaoyu Li
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, China International Neuroscience Institute (China-INI), Beijing, China
| | - Yuhai Bao
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, China International Neuroscience Institute (China-INI), Beijing, China
| | - Jiantao Liang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, China International Neuroscience Institute (China-INI), Beijing, China
| | - Ge Chen
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, China International Neuroscience Institute (China-INI), Beijing, China
| | - Hongchuan Guo
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, China International Neuroscience Institute (China-INI), Beijing, China
| | - Mingchu Li
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, China International Neuroscience Institute (China-INI), Beijing, China
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Tamura T, Tanikawa R, Pirayesh A, Kinoshita Y, Ota N, Noda K, Kamiyama H. Modified micro-scissors as stimulation-dissection tool – Technical note. INTERDISCIPLINARY NEUROSURGERY 2020. [DOI: 10.1016/j.inat.2020.100774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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13
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Electrophysiological predictors of hearing deterioration based on AEP monitoring during petroclival meningioma resection. Neurosurg Rev 2020; 44:1601-1609. [PMID: 32671694 DOI: 10.1007/s10143-020-01350-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/09/2020] [Accepted: 07/08/2020] [Indexed: 10/23/2022]
Abstract
The objective of this study was to calculate the risk of postsurgical hearing deterioration as a function of changes in the amplitude and latency of the most stable components (waves III and V) of the auditory evoked potential (AEP) during petroclival meningioma resection surgery. We retrospectively analyzed intraoperative AEP monitoring results and pre- and postsurgical hearing status in 40 consecutive patients who were surgically treated for petroclival meningiomas. Statistical analyses were conducted to identify the most sensitive and specific way to predict hearing dysfunction after surgery. Patients' mean age was 59 ± 10 years, and 31 (77.5%) were women. Twelve (30%) patients presented with clinically detectable hearing impairment preoperatively. At the first postoperative assessment, four of those 12 patients reported subjective improvement, and eight reported hearing deterioration. Of those eight, four remained stable and four recovered hearing by the last assessment. Wave III latency reached its highest specificity (100%) and sensitivity (71.43%) at x = 143%. Wave V latency, on the other hand, reached its highest sensitivity (71%) and specificity (93%) at x = 124%. Finally, wave V amplitude reached its highest sensitivity (100%) and specificity (79%) at x = 74%. Intraoperative alterations of wave III latency and wave V amplitude seem to be highly sensitive and specific at predicting the risk of auditory dysfunction in patients undergoing petroclival meningioma resection and should be used to determine maximum resection with preservation of function.
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Simultaneous cochlear implantation and removal of acoustic neuroma: implications for hearing. The Journal of Laryngology & Otology 2020; 134:519-525. [PMID: 32613920 DOI: 10.1017/s0022215120000705] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To present our data evaluating the feasibility of simultaneous cochlear implantation with resection of acoustic neuroma. METHODS This paper describes a case series of eight adult patients with a radiologically suspected acoustic neuroma, treated at a tertiary referral centre in Newcastle, Australia, between 2012 and 2015. Patients underwent cochlear implantation concurrently with removal of an acoustic neuroma. The approach was translabyrinthine, with facial nerve monitoring and electrically evoked auditory brainstem response testing. Standard post-implant rehabilitation was employed, with three and six months' follow-up data collected. The main outcome measures were: hearing, subjective benefit of implant, operative complications and tumour recurrence. RESULTS Eight patients underwent simultaneous cochlear implantation with resection of acoustic neuroma over a 3-year period, and had 25-63 months' follow up. There were no major complications. All patients except one gained usable hearing and were daily implant users. CONCLUSION Simultaneous cochlear implantation with resection of acoustic neuroma has been shown to be a safe treatment option, which will be applicable in a wide range of clinical scenarios as the indications for cochlear implantation continue to expand.
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15
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Casano K, Giangrosso G, Mankekar G, Sevy A, Mehta R, Arriaga M. Additional Benefits of Facial Nerve Monitoring during Otologic Surgery. Otolaryngol Head Neck Surg 2020; 163:572-576. [DOI: 10.1177/0194599820915458] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objective This study assesses the role of facial nerve monitoring (FNM) for intraoperative decision making during otologic surgery and possible benefits beyond protecting facial nerve integrity. Study Design This prospective study examines intraoperative FNM data and structured interviews collected during 52 otologic procedures. Setting Tertiary referral center. Subjects and Methods Subjects include adults and children undergoing middle ear or mastoid surgery. Data include intraoperative neuromonitoring activity and structured interviews conducted with the operating surgeon immediately following surgery. Results Facial nerve stimulation was used to confirm the position of the nerve in 42 of 52 surgical procedures. In 26.9% of cases, the patient became “light” and moved under anesthesia, which was predicted by neuromonitoring 71.4% of the time. Through structured interviews, the operating surgeons reported the following. (1) The facial nerve took an unexpected anatomic course in 7.8% of patients and was difficult to identify in 39.2%. (2) The nerve was at increased risk of injury in 66.7% of cases due to chronic disease or previous surgery. (3) Among these high-risk cases, the monitor helped reduce the risk of nerve damage 100% of the time. (4) Neuromonitoring allowed the surgeon to operate faster 86.5% of the time, and (5) FNM allowed the resident to perform more of the operation 68.9% of the time. No patients experienced postoperative facial weakness. Conclusions Beyond potentially protecting facial nerve integrity, this study identified additional benefits of FNM, including warning of patient movement during anesthesia, confirming facial nerve anatomic location, reducing operative time, and enhancing resident surgical experience.
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Affiliation(s)
- Kelsey Casano
- Departments of Otolaryngology and Neurosurgery, LSU Health Sciences Center, New Orleans, Louisiana, USA
| | - Gerard Giangrosso
- Departments of Otolaryngology and Neurosurgery, LSU Health Sciences Center, New Orleans, Louisiana, USA
| | - Gauri Mankekar
- Departments of Otolaryngology and Neurosurgery, LSU Health Sciences Center, New Orleans, Louisiana, USA
| | - Alexander Sevy
- Departments of Otolaryngology and Neurosurgery, LSU Health Sciences Center, New Orleans, Louisiana, USA
| | - Rahul Mehta
- Departments of Otolaryngology and Neurosurgery, LSU Health Sciences Center, New Orleans, Louisiana, USA
| | - Moises Arriaga
- Departments of Otolaryngology and Neurosurgery, LSU Health Sciences Center, New Orleans, Louisiana, USA
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16
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Farid AM, Elkholy AR. Preservation of facial nerve functions during vestibular schwannoma surgery: outcome analysis. EGYPTIAN JOURNAL OF NEUROSURGERY 2019. [DOI: 10.1186/s41984-019-0051-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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17
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Hosoya M, Oishi N, Nishiyama T, Noguchi M, Kasuya K, Suzuki N, Miyazaki H, Ogawa K. Preoperative electrophysiological analysis predicts preservation of hearing and facial nerve function following vestibular schwannoma surgery with continuous intraoperative neural monitoring: Clinical outcomes of 22 cases. Clin Otolaryngol 2019; 44:875-880. [PMID: 31264375 DOI: 10.1111/coa.13399] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 05/15/2019] [Accepted: 06/27/2019] [Indexed: 12/01/2022]
Affiliation(s)
- Makoto Hosoya
- Department of Otorhinolaryngology-Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Naoki Oishi
- Department of Otorhinolaryngology-Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Takanori Nishiyama
- Department of Otorhinolaryngology-Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Masaru Noguchi
- Department of Otorhinolaryngology-Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Kento Kasuya
- Department of Otorhinolaryngology-Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Noriomi Suzuki
- Department of Otorhinolaryngology-Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Hidemi Miyazaki
- Department of Otorhinolaryngology-Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan.,Department of Otorhinolaryngology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Kaoru Ogawa
- Department of Otorhinolaryngology-Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan
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Kasbekar AV, Tam YC, Carlyon RP, Deeks JM, Donnelly N, Tysome J, Mannion R, Axon PR. Intraoperative Monitoring of the Cochlear Nerve during Neurofibromatosis Type-2 Vestibular Schwannoma Surgery and Description of a "Test Intracochlear Electrode". J Neurol Surg Rep 2019; 80:e1-e9. [PMID: 30723658 PMCID: PMC6361632 DOI: 10.1055/s-0038-1673649] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Accepted: 07/27/2017] [Indexed: 10/31/2022] Open
Abstract
Objectives A decision on whether to insert a cochlear implant can be made in neurofibromatosis 2 (NF2) if there is objective evidence of cochlear nerve (CN) function post vestibular schwannoma (VS) excision. We aimed to develop intraoperative CN monitoring to help in this decision. Design We describe the intraoperative monitoring of a patient with NF2 and our stimulating and recording set up. A novel test electrode is used to stimulate the CN electrically. Setting This study was set at a tertiary referral center for skull base pathology. Main outcome measure Preserved auditory brainstem responses leading to cochlear implantation. Results Electrical auditory brainstem response (EABR) waveforms will be displayed from different stages of the operation. A cochlear implant was inserted at the same sitting based on the EABR. Conclusion Electrically evoked CN monitoring can provide objective evidence of CN function after VS excision and aid in the decision-making process of hearing rehabilitation in patients who will be rendered deaf.
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Affiliation(s)
- Anand V Kasbekar
- Cambridge Skull Base Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom.,Department of Otorhinolaryngology, Head and Neck Surgery, Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom.,NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom
| | - Yu Chuen Tam
- Emmeline Centre, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - Robert P Carlyon
- Medical Research Council Cognition and Brain Sciences Unit, Cambridge, United Kingdom
| | - John M Deeks
- Medical Research Council Cognition and Brain Sciences Unit, Cambridge, United Kingdom
| | - Neil Donnelly
- Cambridge Skull Base Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - James Tysome
- Cambridge Skull Base Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - Richard Mannion
- Cambridge Skull Base Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - Patrick R Axon
- Cambridge Skull Base Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
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19
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How Intraoperative Tools and Techniques Have Changed the Approach to Brain Tumor Surgery. Curr Oncol Rep 2018; 20:89. [DOI: 10.1007/s11912-018-0723-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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20
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The utility of “low current” stimulation threshold of intraoperative electromyography monitoring in predicting facial nerve function outcome after vestibular schwannoma surgery: a prospective cohort study of 103 large tumors. J Neurooncol 2018; 138:383-390. [DOI: 10.1007/s11060-018-2806-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 02/14/2018] [Indexed: 10/18/2022]
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21
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Rampp S, Rahne T, Plontke SK, Strauss C, Prell J. [Intraoperative monitoring of cochlear nerve function during cerebello-pontine angle surgery]. HNO 2018; 65:413-418. [PMID: 27815592 DOI: 10.1007/s00106-016-0262-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Surgical procedures in the cerebello-pontine angle (CPA), e. g. for vestibular schwannoma, have an increased risk for damage to the cochlear nerve. Consequently, hearing deterioration up to complete deafness may result with severe impact on quality of life. Methods for intraoperative monitoring of function may minimize such risks. OBJECTIVE Review of current methods for intraoperative monitoring of the cochelar nerve and summary of new developments. MATERIALS AND METHODS Analysis and summary of literature, discussion of new methods. RESULTS Early auditory evoked potentials using click stimuli remain the standard method for intraoperative monitoring of cochlear nerve function. Amplitude and latency changes indicate a risk of postoperative hearing deterioration; however demonstrate only limited further differentiation of hearing quality. As novel methods, near-field recordings may allow faster feedback and auditory steady state responses potentially enable frequency specific testing. CONCLUSIONS Intraoperative monitoring of the cochlear nerve is an integral component of CPA surgery. It enables detection of potential nerve damage and thus contributes to avoiding postoperative functional deficits. Development and implementation of novel and additional approaches may further improve its clinical value.
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Affiliation(s)
- S Rampp
- Universitätsklinik und Poliklinik für Neurochirurgie, Universitätsklinik Halle (Saale), Ernst-Grube-Str. 40, 06120, Halle (Saale), Deutschland.
| | - T Rahne
- Universitätsklinik und Poliklinik für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie, Universitätsklinik Halle (Saale), Halle (Saale), Deutschland
| | - S K Plontke
- Universitätsklinik und Poliklinik für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie, Universitätsklinik Halle (Saale), Halle (Saale), Deutschland
| | - C Strauss
- Universitätsklinik und Poliklinik für Neurochirurgie, Universitätsklinik Halle (Saale), Ernst-Grube-Str. 40, 06120, Halle (Saale), Deutschland
| | - J Prell
- Universitätsklinik und Poliklinik für Neurochirurgie, Universitätsklinik Halle (Saale), Ernst-Grube-Str. 40, 06120, Halle (Saale), Deutschland
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22
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Lourenço B, Madero B, Tringali S, Dubernard X, Khalil T, Chays A, Bazin A, Mom T, Avan P. Non-invasive intraoperative monitoring of cochlear function by cochlear microphonics during cerebellopontine-angle surgery. Eur Arch Otorhinolaryngol 2017; 275:59-69. [PMID: 29080147 DOI: 10.1007/s00405-017-4780-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 10/12/2017] [Indexed: 11/28/2022]
Abstract
In vestibular-schwannoma (VS) surgery, hearing-preservation rate remains low. Besides damage to the cochlear nerve, intraoperative cochlear ischemia is a potential cause of hearing loss. Here, we used non-invasive cochlear microphonic (CM) recordings to detect the cochlear vascular events of VS surgery. Continuous intraoperative CM monitoring, in response to 80-95 dB SPL, 1-kHz tone-bursts, was performed in two samples of patients undergoing retrosigmoid cerebellopontine-angle surgery: one for VS (n = 31) and one for vestibular neurectomy or vasculo-neural conflict causing intractable trigeminal neuralgia, harmless to hearing (n = 19, control group). Preoperative and postoperative hearings were compared as a function of intraoperative CM changes and their chronology. Monitoring was possible throughout except for a few tens of seconds when drilling or suction noises occurred. Four patterns of CM time course were identified, eventless, fluctuating, abrupt or progressive decrease. Only the VS group displayed the last two patterns, mainly during internal-auditory-canal drilling and the ensuing tumor dissection, always with postoperative loss of hearing as an end result. Conversely, eventless and fluctuating CM patterns could be associated with postoperative hearing loss when the cochlear nerve had been reportedly damaged, an event that CM is not meant to detect. Cochlear ischemia is a frequent event in VS surgery that leads to deafness. The findings that CM decrease raised no false alarm, and that CM fluctuations, insignificant in control cases, were easily spotted, suggest that CM intraoperative monitoring is a sensitive tool that could profitably guide VS surgery.
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Affiliation(s)
- Blandine Lourenço
- INSERM, Laboratory of Neurosensory Biophysics, Université Clermont Auvergne, 63000, Clermont-Ferrand, France.,Department of Otolaryngology Head Neck Surgery, University Hospital, Clermont-Ferrand, France.,Centre Jean Perrin, Clermont-Ferrand, France
| | - Béatriz Madero
- INSERM, Laboratory of Neurosensory Biophysics, Université Clermont Auvergne, 63000, Clermont-Ferrand, France.,Department of Otolaryngology Head Neck Surgery, University Hospital, Reims, France.,Centre Jean Perrin, Clermont-Ferrand, France
| | - Stéphane Tringali
- Department of Otolaryngology Head Neck Surgery, University Hospital, Lyon, France
| | - Xavier Dubernard
- Department of Otolaryngology Head Neck Surgery, University Hospital, Reims, France
| | - Toufic Khalil
- Department of Neurosurgery, University Hospital, Clermont-Ferrand, France
| | - André Chays
- Department of Otolaryngology Head Neck Surgery, University Hospital, Reims, France
| | - Arnaud Bazin
- Department of Neurosurgery, University Hospital, Reims, France
| | - Thierry Mom
- INSERM, Laboratory of Neurosensory Biophysics, Université Clermont Auvergne, 63000, Clermont-Ferrand, France.,Department of Otolaryngology Head Neck Surgery, University Hospital, Clermont-Ferrand, France
| | - Paul Avan
- INSERM, Laboratory of Neurosensory Biophysics, Université Clermont Auvergne, 63000, Clermont-Ferrand, France. .,Centre Jean Perrin, Clermont-Ferrand, France.
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Ishikawa M, Kojima A, Terao S, Nagai M, Kusaka G, Naritaka H. Cochlear Nerve Action Potential Monitoring for Preserving Function of an Unseen Cochlear Nerve in Vestibular Schwannoma Surgery. World Neurosurg 2017; 106:1057.e1-1057.e7. [PMID: 28755914 DOI: 10.1016/j.wneu.2017.07.113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 07/17/2017] [Accepted: 07/18/2017] [Indexed: 11/25/2022]
Abstract
BACKGROUND Intraoperative monitoring of cochlear nerve action potential (CNAP) has been used in patients with small vestibular schwannoma (<15 mm) to preserve cochlear nerve function. We performed surgery for a larger vestibular schwannoma under CNAP monitoring with the aim of preserving cochlear nerve function, and compared the data with findings from 10 patients with hemifacial spasm who underwent microvascular decompression surgery. CASE DESCRIPTION We report the case of a patient with a 26-mm vestibular schwannoma and normal hearing function who underwent neurosurgery under electrophysiological monitoring of the facial and cochlear nerves. Amplitudes of evoked facial muscle responses were maintained at approximately 70% during the operation. The latency of wave V on brainstem auditory evoked potential (BAEP) increased by 0.5 ms, and amplitude was maintained at approximately 70% of the value at the beginning of the operation. Latencies of P1, N1, and P2 on CNAP did not change intraoperatively. These latencies were comparable to those of 10 normal patients with hemifacial spasm. CNAP monitoring proved very useful in confirming the location of the cochlear nerve in the operative field and preserving cochlear nerve function. Both facial nerve function and hearing acuity were completely preserved after tumor removal, and wave V latency on BAEP returned to normal and was maintained in the normal range for at least 2 years. CONCLUSIONS CNAP monitoring is extremely useful for preserving the function of the unseen cochlear nerve during vestibular schwannoma surgery.
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Affiliation(s)
- Mami Ishikawa
- Department of Neurosurgery, Edogawa Hospital, Tokyo, Japan; Department of Neurosurgery, Saitama Medical Center, Jichi Medical University, Saitama, Japan.
| | - Atsuhiro Kojima
- Department of Neurosurgery, Saitama City Hospital, Saitama, Japan
| | - Satoshi Terao
- Department of Neurosurgery, Saiseikai Central Hospital, Tokyo, Japan
| | - Mutsumi Nagai
- Department of Neurosurgery, Saitama Medical Center, Jichi Medical University, Saitama, Japan
| | - Gen Kusaka
- Department of Neurosurgery, Saitama Medical Center, Jichi Medical University, Saitama, Japan
| | - Heiji Naritaka
- Department of Neurosurgery, Edogawa Hospital, Tokyo, Japan
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Trindade Gomes Silva V, Prudente M, Teixeira MJ, Paiva WS. Evoked Potentials of Caudal Cranial Nerves and Functional Outcomes in Skull Base Surgery. World Neurosurg 2017; 99:801. [PMID: 28314249 DOI: 10.1016/j.wneu.2016.10.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 10/22/2016] [Indexed: 10/19/2022]
Affiliation(s)
| | - Marcelo Prudente
- Department of Neurology, University of São Paulo, São Paulo, Brazil
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25
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Hong W, Cheng H, Wang X, Feng C. Influencing Factors Analysis of Facial Nerve Function after the Microsurgical Resection of Acoustic Neuroma. J Korean Neurosurg Soc 2017; 60:165-173. [PMID: 28264236 PMCID: PMC5365300 DOI: 10.3340/jkns.2013.0407.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 09/29/2013] [Indexed: 11/27/2022] Open
Abstract
Objective To explore and analyze the influencing factors of facial nerve function retainment after microsurgery resection of acoustic neurinoma. Methods Retrospective analysis of our hospital 105 acoustic neuroma cases from October, 2006 to January 2012, in the group all patients were treated with suboccipital sigmoid sinus approach to acoustic neuroma microsurgery resection. We adopted researching individual patient data, outpatient review and telephone followed up and the House-Brackmann grading system to evaluate and analyze the facial nerve function. Results Among 105 patients in this study group, complete surgical resection rate was 80.9% (85/105), subtotal resection rate was 14.3% (15/105), and partial resection rate 4.8% (5/105). The rate of facial nerve retainment on neuroanatomy was 95.3% (100/105) and the mortality rate was 2.1% (2/105). Facial nerve function when the patient is discharged from the hospital, also known as immediate facial nerve function which was graded in House-Brackmann: excellent facial nerve function (House-Brackmann I–II level) cases accounted for 75.2% (79/105), facial nerve function III–IV level cases accounted for 22.9% (24/105), and V–VI cases accounted for 1.9% (2/105). Patients were followed up for more than one year, with excellent facial nerve function retention rate (H-B I–II level) was 74.4% (58/78). Conclusion Acoustic neuroma patients after surgery, the long-term (≥1 year) facial nerve function excellent retaining rate was closely related with surgical proficiency, post-operative immediate facial nerve function, diameter of tumor and whether to use electrophysiological monitoring techniques; while there was no significant correlation with the patient’s age, surgical approach, whether to stripping the internal auditory canal, whether there was cystic degeneration, tumor recurrence, whether to merge with obstructive hydrocephalus and the length of the duration of symptoms.
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Affiliation(s)
- WenMing Hong
- Department of Neurosuregery, First Affliated Hospital, AnHui Medical Univesity, Hefei, China
| | - HongWei Cheng
- Department of Neurosuregery, First Affliated Hospital, AnHui Medical Univesity, Hefei, China
| | - XiaoJie Wang
- Department of Pathology, First Affliated Hospital, AnHui Medical Univesity, Hefei, China
| | - ChunGuo Feng
- Department of Neurosuregery, First Affliated Hospital, AnHui Medical Univesity, Hefei, China
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26
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Microsurgical resection of vestibular schwannomas: complication avoidance. J Neurooncol 2016; 130:367-375. [DOI: 10.1007/s11060-016-2260-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 08/27/2016] [Indexed: 10/21/2022]
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27
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Insertion of intra-oral electrodes for cranial nerve monitoring using a Crowe-Davis retractor. J Clin Monit Comput 2016; 31:793-796. [PMID: 27379841 PMCID: PMC5500665 DOI: 10.1007/s10877-016-9904-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 07/01/2016] [Indexed: 11/11/2022]
Abstract
Acoustic neuroma resection is an example of a neurosurgical procedure where the brainstem and multiple cranial nerves are at risk for injury. Electrode placement for monitoring of the glossopharyngeal and hypoglossal nerves during acoustic neuroma resection can be challenging. The purpose of this report is to illustrate the use of a device for intra-oral electrode placement for intraoperative monitoring of the glossopharyngeal and hypoglossal nerves. A 60-year-old male presented for acoustic neuroma resection. Under general anesthesia, a Crowe–Davis retractor was used to open the mouth, providing access to the posterior pharynx. For glossopharyngeal monitoring, two bent subdermal needle electrodes were inserted just lateral to the uvula. Two additional electrodes were inserted on the lateral tongue to monitor the hypoglossal nerve. Cranial nerves monitoring was conducted utilizing both free running and triggered electromyography of the trigeminal and facial nerves in addition to the lower cranial nerves. The tumor was resected successfully. Monitoring of the cranial nerves (including the glossopharyngeal and hypoglossal nerves) revealed no concerning responses. The Crowe–Davis retractor and the technique described allowed insertion of electrodes for neural monitoring, contributing to neural preservation.
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Intraoperative neurophysiological monitoring in peripheral nerve surgery: Technical description and experience in a center. Rev Esp Cir Ortop Traumatol (Engl Ed) 2015. [DOI: 10.1016/j.recote.2015.04.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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29
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Liu SW, Jiang W, Zhang HQ, Li XP, Wan XY, Emmanuel B, Shu K, Chen JC, Chen J, Lei T. Intraoperative neuromonitoring for removal of large vestibular schwannoma: Facial nerve outcome and predictive factors. Clin Neurol Neurosurg 2015; 133:83-9. [DOI: 10.1016/j.clineuro.2015.03.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 02/27/2015] [Accepted: 03/21/2015] [Indexed: 11/27/2022]
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30
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Herrera-Pérez M, Oller-Boix A, Pérez-Lorensu PJ, de Bergua-Domingo J, Gonzalez-Casamayor S, Márquez-Marfil F, Díaz-Flores L, Pais-Brito JL. Intraoperative neurophysiological monitoring in peripheral nerve surgery: Technical description and experience in a centre. Rev Esp Cir Ortop Traumatol (Engl Ed) 2015; 59:266-74. [PMID: 25572819 DOI: 10.1016/j.recot.2014.11.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 10/05/2014] [Accepted: 11/08/2014] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Intraoperative neurophysiological monitoring has experienced a spectacular development in the past 20 years, particularly in the fields of neurosurgery and spine surgery. it has become a useful, almost indispensable, tool in preventing nerve damage during surgery. The aim of this article is to describe the intraoperative technique and analyze its results in the field of peripheral nerve surgery. OBJECTIVE To describe the usefulness of a technique in peripheral nerve surgery, the technique used and the experience in a centre. PATIENTS AND METHODS A retrospective study was conducted on 30 cases of peripheral nerve surgery performed in this centre from 2009 to 2013, using the intraoperative monitoring technique. RESULTS Of the total of 13 peripheral nerve tumors recorded, there were 11 excellent results and 2 good results, one temporary hypoesthesia and one with almost complete sensory, except for motor, recovery. Traumatic injury was recorded in 17 cases, of which 6 required performing a graft, and the remaining 11 cases only neurolysis was performed, with complete motor and sensory recovery. CONCLUSIONS Intraoperative neurophysiological monitoring is a useful tool in the secondary surgery of peripheral nerve injury and the intraneural tumor pathology.
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Affiliation(s)
- M Herrera-Pérez
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Universitario de Canarias, La Laguna, Tenerife, España; Facultad de Medicina, Universidad de La Laguna, La Laguna, Tenerife, España.
| | - A Oller-Boix
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Universitario de Canarias, La Laguna, Tenerife, España
| | - P J Pérez-Lorensu
- Unidad de Monitorización Neurofisiológica Intraoperatoria, Servicio de Neurofisiología Clínica, Hospital Universitario de Canarias, La Laguna, Tenerife, España
| | - J de Bergua-Domingo
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Universitario de Canarias, La Laguna, Tenerife, España
| | - S Gonzalez-Casamayor
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Universitario de Canarias, La Laguna, Tenerife, España
| | - F Márquez-Marfil
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Universitario de Canarias, La Laguna, Tenerife, España
| | - L Díaz-Flores
- Servicio de Radiodiagnóstico, Hospital Universitario de Canarias, La Laguna, Tenerife, España
| | - J L Pais-Brito
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Universitario de Canarias, La Laguna, Tenerife, España; Facultad de Medicina, Universidad de La Laguna, La Laguna, Tenerife, España
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Møller MN, Hansen S, Miyazaki H, Stangerup SE, Caye-Thomasen P. Active Treatment is Not Indicated in the Majority of Patients Diagnosed with a Vestibular Schwannoma: A Review on the Natural History of Hearing and Tumor Growth. CURRENT OTORHINOLARYNGOLOGY REPORTS 2014. [DOI: 10.1007/s40136-014-0064-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Schick B, Dlugaiczyk J. Surgery of the ear and the lateral skull base: pitfalls and complications. GMS CURRENT TOPICS IN OTORHINOLARYNGOLOGY, HEAD AND NECK SURGERY 2013; 12:Doc05. [PMID: 24403973 PMCID: PMC3884540 DOI: 10.3205/cto000097] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Surgery of the ear and the lateral skull base is a fascinating, yet challenging field in otorhinolaryngology. A thorough knowledge of the associated complications and pitfalls is indispensable for the surgeon, not only to provide the best possible care to his patients, but also to further improve his surgical skills. Following a summary about general aspects in pre-, intra-and postoperative care of patients with disorders of the ear/lateral skull base, this article covers the most common pitfalls and complications in stapes surgery, cochlear implantation and surgery of vestibular schwannomas and jugulotympanal paragangliomas. Based on these exemplary procedures, basic "dos and don'ts" of skull base surgery are explained, which the reader can easily transfer to other disorders. Special emphasis is laid on functional aspects, such as hearing, balance and facial nerve function. Furthermore, the topics of infection, bleeding, skull base defects, quality of life and indication for revision surgery are discussed. An open communication about complications and pitfalls in ear/lateral skull base surgery among surgeons is a prerequisite for the further advancement of this fascinating field in ENT surgery. This article is meant to be a contribution to this process.
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Affiliation(s)
- Bernhard Schick
- Dept. of Otorhinolaryngology, Saarland University Medical Center, Homburg/Saar, Germany
| | - Julia Dlugaiczyk
- Dept. of Otorhinolaryngology, Saarland University Medical Center, Homburg/Saar, Germany
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You YP, Zhang JX, Lu AL, Liu N. Vestibular schwannoma surgical treatment. CNS Neurosci Ther 2013; 19:289-93. [PMID: 23462373 DOI: 10.1111/cns.12080] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2012] [Revised: 01/14/2013] [Accepted: 02/03/2013] [Indexed: 11/30/2022] Open
Abstract
Neurosurgical intervention remains the main step in the effective management of vestibular schwannomas. Extensive studies on vestibular schwannoma treatment have placed emphasis on preserving quality of life and neurological functions, particularly of the facial and vestibulocochlear nerves. Facial nerve preservation and hearing preservation have been achieved by significant advances in skull base microsurgical techniques and intraoperative neuromonitoring. Diffusion tensor imaging is a powerful and accurate method for preoperatively identifying the facial nerve in relation to vestibular schwannomas. Endoscopy offers excellent illumination of the anatomical structures and provides panoramic vision inside the surgical area. In this report, we focused on facial nerve and vestibulocochlear nerve preservation and analyzed the major techniques used for identifying the nerve-tumor relationship.
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Affiliation(s)
- Yong-Ping You
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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