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Amagasaki K, Nishimura S, Uchida T, Tatebayashi K, Nakaguchi H. Infrafloccular approach effectively prevents hearing complication in microvascular decompression surgery for hemifacial spasm. Br J Neurosurg 2024; 38:863-866. [PMID: 34620013 DOI: 10.1080/02688697.2021.1988052] [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: 10/25/2020] [Revised: 06/30/2021] [Accepted: 09/28/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE The infrafloccular approach in microvascular decompression (MVD) surgery for hemifacial spasm (HFS) was investigated for the prevention of hearing complications. METHODS Retrospective analysis of 136 patients who underwent MVD for HFS in 2019. The infrafloccular approach for MVD was adopted to resolve the symptom and protect hearing function. Postoperative hearing function was evaluated subjectively and objectively within 30 postoperative days, and later mainly subjectively. Postoperative condition of mastoid air cells based on the CT scan of the following day was also recorded. RESULTS No final postoperative subjective hearing impairment was found in all patients. Mastoid air cells were opened in 105 patients, and subjective hearing impairment was recorded in 57 patients within 30 postoperative days, but all improved later. Increases in thresholds of greater than 10 dB in air conduction were observed in 28 patients, including 26 of transient conductive hearing loss (increases in the threshold of less than or equal to 10 dB). The other 2 patients with increases in the threshold of greater than 10 dB in both air and bone conduction had improvement confirmed by later audiometry. CONCLUSIONS Infrafloccular approach in MVD for HFS provides a good hearing outcome. Inclusion of postoperative hearing conditions in the later period is ideal for a precise hearing evaluation.
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Affiliation(s)
| | | | - Tatsuya Uchida
- Department of Neurosurgery, Mitsui Memorial Hospital, Tokyo, Japan
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2
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Guzzi G, Ricciuti RA, Della Torre A, Lo Turco E, Lavano A, Longhini F, La Torre D. Intraoperative Neurophysiological Monitoring in Neurosurgery. J Clin Med 2024; 13:2966. [PMID: 38792507 PMCID: PMC11122101 DOI: 10.3390/jcm13102966] [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: 04/16/2024] [Revised: 05/08/2024] [Accepted: 05/16/2024] [Indexed: 05/26/2024] Open
Abstract
Intraoperative neurophysiological monitoring (IONM) is a crucial advancement in neurosurgery, enhancing procedural safety and precision. This technique involves continuous real-time assessment of neurophysiological signals, aiding surgeons in timely interventions to protect neural structures. In addition to inherent limitations, IONM necessitates a detailed anesthetic plan for accurate signal recording. Given the growing importance of IONM in neurosurgery, we conducted a narrative review including the most relevant studies about the modalities and their application in different fields of neurosurgery. In particular, this review provides insights for all physicians and healthcare professionals unfamiliar with IONM, elucidating commonly used techniques in neurosurgery. In particular, it discusses the roles of IONM in various neurosurgical settings such as tumoral brain resection, neurovascular surgery, epilepsy surgery, spinal surgery, and peripheral nerve surgery. Furthermore, it offers an overview of the anesthesiologic strategies and limitations of techniques essential for the effective implementation of IONM.
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Affiliation(s)
- Giusy Guzzi
- Neurosurgery Department, “R. Dulbecco” Hospital, 88100 Catanzaro, Italy
- Department of Medical and Surgical Sciences, “Magna Graecia” University of Catanzaro, 88100 Catanzaro, Italy
| | | | - Attilio Della Torre
- Neurosurgery Department, “R. Dulbecco” Hospital, 88100 Catanzaro, Italy
- Department of Medical and Surgical Sciences, “Magna Graecia” University of Catanzaro, 88100 Catanzaro, Italy
| | - Erica Lo Turco
- Neurosurgery Department, “R. Dulbecco” Hospital, 88100 Catanzaro, Italy
- Department of Medical and Surgical Sciences, “Magna Graecia” University of Catanzaro, 88100 Catanzaro, Italy
| | - Angelo Lavano
- Neurosurgery Department, “R. Dulbecco” Hospital, 88100 Catanzaro, Italy
- Department of Medical and Surgical Sciences, “Magna Graecia” University of Catanzaro, 88100 Catanzaro, Italy
| | - Federico Longhini
- Department of Medical and Surgical Sciences, “Magna Graecia” University of Catanzaro, 88100 Catanzaro, Italy
- Anesthesia and Intensive Care Unit, “R. Dulbecco” Hospital, 88100 Catanzaro, Italy
| | - Domenico La Torre
- Neurosurgery Department, “R. Dulbecco” Hospital, 88100 Catanzaro, Italy
- Department of Medical and Surgical Sciences, “Magna Graecia” University of Catanzaro, 88100 Catanzaro, Italy
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Truong VT, Ngo MQ, Phan D, Le H, Tran Hoang NA. Results from 228 Patients with Hemifacial Spasm Undergoing Microvascular Decompression without Intraoperative Neuroelectrophysiology Monitoring. World Neurosurg 2024; 185:e461-e466. [PMID: 38369107 DOI: 10.1016/j.wneu.2024.02.053] [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: 01/30/2024] [Accepted: 02/09/2024] [Indexed: 02/20/2024]
Abstract
BACKGROUND Intraoperative neuroelectrophysiology monitoring (IONM) has been used to decrease complications and to increase the successful rate of microvascular decompression (MVD) MVD for hemifacial spasm (HFS). Still, it is not available at limited resource centers. We report the outcome of patients undergoing MVD for HFS without using IONM. METHODS The variables concerning the patients' demographics (age and gender), clinical characteristics, offending vessels (vertebral artery type and non-vertebral artery type), postoperative grade of HFS, and postoperative complications of HFS patients undergoing MVD were retrospectively reviewed and collected. The scoring system provided by the Japan Society for MVD was used to evaluate the postoperative outcome of HFS. Postoperative hearing ability was evaluated according to a subjective assessment of the patients. RESULTS A total of 228 patients were recruited. Their median age was 51.0 (44.0-57.0) years old. The total cure effect was observed in 207 (90.8%) patients within the first week after the surgery and in 200 (96.1%) patients in a 2-year follow-up. Permanent hearing disturbance happened in 2 patients (0.9%). No patient had permanent unilateral deafness (0%). No postoperative permanent facial paralysis was reported. CONCLUSIONS MVD without IONM may be performed safely and effectively to treat patients with HFS.
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Affiliation(s)
- Van Tri Truong
- Department of Neurosurgery, Vinmec Central Park International Hospital, Vinmec Healthcare system, Ho Chi Minh City, Vietnam.
| | - Minh Quan Ngo
- Department of Neurosurgery, Nhan Dan Gia Dinh hospital, Ho Chi Minh City, Vietnam
| | - Duy Phan
- Department of Neurosurgery, Vinmec Central Park International Hospital, Vinmec Healthcare system, Ho Chi Minh City, Vietnam
| | - Hung Le
- Department of Neurosurgery, Vinmec Central Park International Hospital, Vinmec Healthcare system, Ho Chi Minh City, Vietnam
| | - Ngoc Anh Tran Hoang
- Department of Neurosurgery, Vinmec Central Park International Hospital, Vinmec Healthcare system, Ho Chi Minh City, Vietnam
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Al-Qudah AM, Thirumala PD, Anetakis KM, Crammond DJ, Algarni SA, AlMajali M, Shandal V, Gross BA, Lang M, Bhatt NR, Al-Bayati AR, Nogueira RG, Balzer JR. Intraoperative neuromonitoring as real-time diagnostic for cerebral ischemia in endovascular treatment of ruptured brain aneurysms. Clin Neurophysiol 2024; 161:69-79. [PMID: 38452426 DOI: 10.1016/j.clinph.2024.02.024] [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: 05/28/2023] [Revised: 01/11/2024] [Accepted: 02/19/2024] [Indexed: 03/09/2024]
Abstract
OBJECTIVE To evaluate the diagnostic accuracy of intraoperative neurophysiological monitoring (IONM) during endovascular treatment (EVT) of ruptured intracranial aneurysms (rIA). METHODS IONM and clinical data from 323 patients who underwent EVT for rIA from 2014-2019 were retrospectively reviewed. Significant IONM changes and outcomes were evaluated based on visual review of data and clinical documentation. RESULTS Of the 323 patients undergoing EVT, significant IONM changes were noted in 30 patients (9.29%) and 46 (14.24%) experienced postprocedural neurological deficits (PPND). 22 out of 30 (73.33%) patients who had significant IONM changes experienced PPND. Univariable analysis showed changes in somatosensory evoked potential (SSEP) and electroencephalogram (EEG) were associated with PPND (p-values: <0.001 and <0.001, retrospectively). Multivariable analysis showed that IONM changes were significantly associated with PPND (Odd ratio (OR) 20.18 (95%CI:7.40-55.03, p-value: <0.001)). Simultaneous changes in both IONM modalities had specificity of 98.9% (95% CI: 97.1%-99.7%). While sensitivity when either modality had a change was 47.8% (95% CI: 33.9%-62.0%) to predict PPND. CONCLUSIONS Significant IONM changes during EVT for rIA are associated with an increased risk of PPND. SIGNIFICANCE IONM can be used confidently as a real time neurophysiological diagnostic guide for impending neurological deficits during EVT treatment of rIA.
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Affiliation(s)
- Abdullah M Al-Qudah
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA; Department of Neurology, UPMC Stroke Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Parthasarathy D Thirumala
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA; Department of Neurology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Katherine M Anetakis
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Donald J Crammond
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Saleh A Algarni
- Department of Clinical Neurosciences, College of Medicine, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia; Neuroscience Centre, King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - Mohammad AlMajali
- Department of Neurology, University of Iowa College of Medicine, Iowa City, IA, USA
| | - Varun Shandal
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Bradley A Gross
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Michael Lang
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nirav R Bhatt
- Department of Neurology, UPMC Stroke Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Alhamza R Al-Bayati
- Department of Neurology, UPMC Stroke Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Raul G Nogueira
- Department of Neurology, UPMC Stroke Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Jeffrey R Balzer
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
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Kobayashi M, Hirata S, Fujimaki T. Neuroprotective Effects of Artificial Cerebrospinal Fluid: Analysis of Brainstem Auditory-Evoked Potential Monitoring During Microvascular Decompression in 117 Consecutive Patients. Neurosurgery 2023; 94:00006123-990000000-00994. [PMID: 38084994 PMCID: PMC10990391 DOI: 10.1227/neu.0000000000002793] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 10/25/2023] [Indexed: 04/05/2024] Open
Abstract
BACKGROUND AND OBJECTIVES To study the efficacy of irrigation with artificial cerebrospinal fluid (aCSF) for protection of cranial nerves during surgery; the time required for recovery of brainstem auditory-evoked potentials (BAEPs) that would reflect cochlear function was analyzed in comparison with that for saline irrigation. METHODS This retrospective study included 117 consecutive patients (95 women, mean age 51.5 ± 11.4 year) who underwent microvascular decompression for hemifacial spasm. During surgery, BAEPs were monitored to avoid damage to the auditory pathways. When a delayed latency of >1 ms or a decrease in amplitude of >50% was detected in BAEP wave V, surgical maneuvers were halted, and the operative field was irrigated with saline or aCSF. Saline was used for irrigation in 58 patients and aCSF in the other 59. The time required for BAEP recovery at the first halt in each patient was analyzed, and the results were compared between the groups. RESULTS Surgical procedures were interrupted because of BAEP latency delays or decreases in amplitude in 51 of the patients in the saline group and 54 in the aCSF group. In both groups, the latencies and amplitudes recovered significantly with time and both recovered earlier after aCSF irrigation than after saline irrigation. Hearing outcome was not significantly different between 2 groups. CONCLUSION aCSF is effective for protection of cochlear nerve and promotes recovery from transient dysfunction during surgery. The protective effect may be attributed to multiple factors including conditioned pH, electrolyte composition, glucose, and microelements, such as magnesium and phosphate.
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Affiliation(s)
| | - Sachiko Hirata
- Department of Neurosurgery, Saitama Medical University, Saitama, Japan
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Inoue T, Goto Y, Inoue Y, Adidharma P, Prasetya M, Fukushima T. Potential reasons for failure and recurrence in microvascular decompression for hemifacial spasm. Acta Neurochir (Wien) 2023; 165:3845-3852. [PMID: 38012393 DOI: 10.1007/s00701-023-05861-7] [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: 09/21/2023] [Accepted: 10/22/2023] [Indexed: 11/29/2023]
Abstract
BACKGROUND To examine the factors contributing to persistent and recurrent hemifacial spasms (HFS) following a microvascular decompression (MVD) procedure and to suggest technical improvements to prevent such failures. METHODS A retrospective review was conducted on fifty-two cases of repeat surgery. The extent of the previous craniotomy and the location of neurovascular compression (NVC) were investigated. The operative findings were categorized into two groups: "Missing Compression" and "Teflon Contact". The analysis included long-term outcomes and operative complications after repeat MVD procedures. RESULTS Missing compression was identified in 29 patients (56%), while Teflon contact was observed in 23 patients (44%). Patients with missing compression were more likely to experience improper craniotomy (66%) compared to those with Teflon contact (48%). Medially located NVC was a frequent finding in both groups, mainly due to compression by the anterior inferior cerebellar artery. In the missing compression group, during the repeat MVD, Teflon sling retraction was utilized in 79% of cases, while in the Teflon contact group, the most common procedure involved removing the Teflon in contact (65%). After the repeat MVD procedure, immediate spasm relief was achieved in 42 patients (81%), with six (12%) experiencing delayed relief. After a median follow-up of 54 months, 96% of patients were free from spasms. Delayed facial palsy, facial weakness, and hearing impairment were more frequently observed in the Teflon contact group. CONCLUSIONS A proper craniotomy that provides adequate exposure around the REZ is crucial to prevent missing the culprit vessel during the initial MVD procedure. Teflon contact on the REZ should be avoided, as it poses a potential risk of procedure failure and recurrence.
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Affiliation(s)
- Takuro Inoue
- Department of Neurosurgery, Koto Memorial Hospital, Higashiomi, Shiga, Japan.
- Department of Neurosurgery, National Brain Center Hospital, Jakarta, Indonesia.
| | - Yukihiro Goto
- Department of Neurosurgery, Koto Memorial Hospital, Higashiomi, Shiga, Japan
| | - Yasuaki Inoue
- Department of Neurosurgery, Nadogaya Hospital, Chiba, Japan
| | - Peter Adidharma
- Department of Neurosurgery, National Brain Center Hospital, Jakarta, Indonesia
| | - Mustaqim Prasetya
- Department of Neurosurgery, National Brain Center Hospital, Jakarta, Indonesia
| | - Takanori Fukushima
- Division of Neurosurgery, Duke University Medical Center, Durham, North Carolina, USA
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Alkhayri A, Bourdillon P, Chauvet D, Bugdadi A, Alyousef M, Alsalmi S, Apra C, Lefaucheur JP, Aldea S, Le Guérinel C. Surgical treatment of hemifacial spasms: how to predict failure and complications through a series of 200 patients. Neurochirurgie 2023; 69:101498. [PMID: 37741362 DOI: 10.1016/j.neuchi.2023.101498] [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: 04/12/2023] [Revised: 08/16/2023] [Accepted: 09/16/2023] [Indexed: 09/25/2023]
Abstract
Primary hemifacial spasm (pHFS) is a benign but disabling movement disorder caused by a neurovascular conflict involving the facial nerve. Surgical treatment by microvascular decompression (MVD) is the most effective therapeutic. Predictors of surgical failure and surgical complications are still lacking. The aim of this study is to identify such predictors through the retrospective analysis of a series of 200 consecutive patients. All patients who underwent MVD for pHFS from January 1991 to December 2017 were included. All patients had at least two years follow-up. In addition to the demographic data, the outcome and the complications were collected. The primary outcome analysis showed that 7.5% of patients had a recurrence. Multiple and AICA related neurovascular conflicts were statistically associated to a higher recurrence rate after MVD (respectively p < 0.001 and p = 0.02). Permanent facial palsy occurred in 2.5% of patients, hearing loss in 9.0% (2.0% of complete unilateral impairment) and dizziness in 2.5%. The risk of each of these peripheral neurological impairments was statistically increased by a long duration between the first pHFS symptom and the MVD (p < 0.001). In case of recurrence, a second MDV was offered. Long term follow-up showed that all patients had a complete resolution of the HFS. Post-operative complication rate was not significantly increased after a second MVD. Multiple and AICA related neurovascular conflicts are associated to a higher risk of surgical failure. When a pHFS recurrence occurs, a second surgical procedure is associated with excellent outcome without significant increase of post-operative complications and should therefore be recommended.
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Affiliation(s)
- Abdu Alkhayri
- Department of Neurosurgery, Rothschild Foundation Hospital, Paris, France; Paris Cité University, Faculty of Medicine, Paris, France
| | - Pierre Bourdillon
- Department of Neurosurgery, Rothschild Foundation Hospital, Paris, France; Paris Cité University, Faculty of Medicine, Paris, France.
| | - Dorian Chauvet
- Department of Neurosurgery, Rothschild Foundation Hospital, Paris, France
| | - Abdulgadir Bugdadi
- Department of Surgery, Faculty of Medicine, Umm Al Qura University, Makkah, Almukarramah, Saudi Arabia
| | - Mohammed Alyousef
- Department of Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sultan Alsalmi
- Department of Neurosurgery, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Caroline Apra
- Department of Neurosurgery, Rothschild Foundation Hospital, Paris, France; Sorbonne University, Faculty of Medicine, Paris, France
| | - Jean-Pascal Lefaucheur
- Department of Neuro-physiology, Henri Mondor University Hospital, Assistance Publique Hôpitaux de Paris, Créteil, France; University of Paris-Est, Paris, France
| | - Sorin Aldea
- Department of Neurosurgery, Rothschild Foundation Hospital, Paris, France
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Jeon C, Kim M, Lee HS, Kong DS, Park K. Outcomes after Microvascular Decompression for Hemifacial Spasm without Definite Radiological Neurovascular Compression at the Root Exit Zone. Life (Basel) 2023; 13:2064. [PMID: 37895445 PMCID: PMC10608077 DOI: 10.3390/life13102064] [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: 07/31/2023] [Revised: 09/24/2023] [Accepted: 09/29/2023] [Indexed: 10/29/2023] Open
Abstract
The purpose of this study was to investigate the outcome of microvascular decompression (MVD) in patients with hemifacial spasm (HFS) who have no definite radiological neurovascular compression (NVC). Sixteen HFS patients without radiological NVC on preoperative MRI underwent MVD surgery. The symptoms were left-sided in fourteen (87.5%) and right-sided in two patients (12.5%). Intraoperatively, the most common vessel compressing the facial nerve was the AICA (8, 44.4%), followed by arterioles (5, 27.8%), veins (4, 22.2%), and the PICA (1, 5.6%). The most common compression site was the cisternal portion (13, 76.5%) of the facial nerve, followed by the REZ (4, 23.5%). One patient (6.3%) was found to have multiple NVC sites. Arachnoid type (7, 50%) was the most common compressive pattern, followed by perforator type (4, 28.6%), sandwich type (2, 14.3%), and loop type (1, 7.1%). A pure venous compression was seen in two patients, while a combined venous-arterial "sandwich" compression was detected in two patients. Symptom improvement was observed in all of the patients. Only one patient experienced recurrence after improvement. Based on our experience, MVD surgery can be effective for primary HFS patients with no definite radiological NVC. MVD can be considered if the patient shows typical HFS features, although NVC is not evident on MRI.
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Affiliation(s)
- Chiman Jeon
- Department of Neurosurgery, Korea University Ansan Hospital, Ansan 15355, Republic of Korea;
| | - Minsoo Kim
- Department of Neurosurgery, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung 25440, Republic of Korea;
| | - Hyun-Seok Lee
- Department of Neurosurgery, Konkuk University Medical Center, Seoul 05030, Republic of Korea;
| | - Doo-Sik Kong
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea;
| | - Kwan Park
- Department of Neurosurgery, Konkuk University Medical Center, Seoul 05030, Republic of Korea;
- Department of Neurosurgery, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
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Park SK, Lee HS, Cho KR, Park K. Recent Advances in Intraoperative Brainstem Auditory Evoked Potential Monitoring during Microvascular Decompression Surgery for Hemifacial Spasm. Life (Basel) 2023; 13:1789. [PMID: 37763193 PMCID: PMC10532422 DOI: 10.3390/life13091789] [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: 07/05/2023] [Revised: 08/16/2023] [Accepted: 08/20/2023] [Indexed: 09/29/2023] Open
Abstract
Brainstem auditory evoked potential (BAEP) testing during microvascular decompression (MVD) is very important in the treatment of hemifacial spasm (HFS). The reason for this is that the vestibulocochlear nerve is located immediately next to the facial nerve, so the vestibulocochlear nerve may be affected by manipulation during surgery. BAEP testing for detecting vestibulocochlear nerve damage has been further developed for use during surgery. In most HFS patients with normal vestibulocochlear nerves, the degree of vestibulocochlear nerve damage caused by surgery is well-reflected in the BAEP test waveforms. Therefore, real-time testing is the best way to minimize damage to the vestibulocochlear nerve. The purpose of this study was to review the most recently published BAEP test waveforms that were obtained during MVD surgery to determine the relationship between vestibulocochlear nerve damage and BAEP waveforms.
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Affiliation(s)
- Sang-Ku Park
- Department of Neurosurgery, Konkuk University Medical Center, Seoul 05030, Republic of Korea (H.S.L.)
| | - Hyun Seok Lee
- Department of Neurosurgery, Konkuk University Medical Center, Seoul 05030, Republic of Korea (H.S.L.)
| | - Kyung Rae Cho
- Department of Neurosurgery, Konkuk University Medical Center, Seoul 05030, Republic of Korea (H.S.L.)
| | - Kwan Park
- Department of Neurosurgery, Konkuk University Medical Center, Seoul 05030, Republic of Korea (H.S.L.)
- Department of Neurosurgery, School of Medicine, Sungkyunkwan University, Seoul 03063, Republic of Korea
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10
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Hemifacial Spasm Caused by Distal Neurovascular Compression Confirmed by Lateral Spread Response Monitoring. J Craniofac Surg 2022; 33:2555-2559. [DOI: 10.1097/scs.0000000000008820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 05/03/2022] [Indexed: 02/04/2023] Open
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Joo BE, Kim JS, Deletis V, Park KS. Advances in Intraoperative Neurophysiology During Microvascular Decompression Surgery for Hemifacial Spasm. J Clin Neurol 2022; 18:410-420. [PMID: 35796266 PMCID: PMC9262452 DOI: 10.3988/jcn.2022.18.4.410] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 05/03/2022] [Accepted: 05/03/2022] [Indexed: 11/17/2022] Open
Abstract
Microvascular decompression (MVD) is a widely used surgical intervention to relieve the abnormal compression of a facial nerve caused by an artery or vein that results in hemifacial spasm (HFS). Various intraoperative neurophysiologic monitoring (ION) and mapping methodologies have been used since the 1980s, including brainstem auditory evoked potentials, lateral-spread responses, Z-L responses, facial corticobulbar motor evoked potentials, and blink reflexes. These methods have been applied to detect neuronal damage, to optimize the successful decompression of a facial nerve, to predict clinical outcomes, and to identify changes in the excitability of a facial nerve and its nucleus during MVD. This has resulted in multiple studies continuously investigating the clinical application of ION during MVD in patients with HFS. In this study we aimed to review the specific advances in methodologies and clinical research related to ION techniques used in MVD surgery for HFS over the last decade. These advances have enabled clinicians to improve the efficacy and surgical outcomes of MVD, and they provide deeper insight into the pathophysiology of the disease.
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Affiliation(s)
- Byung-Euk Joo
- Department of Neurology, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Jun-Soon Kim
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Vedran Deletis
- Department of Neurosurgery, University Hospital Dubrava, Zagreb, Croatia and Albert Einstein College of Medicine, New York, NY, USA
| | - Kyung Seok Park
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
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12
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Microvascular decompression: a bibliometric analysis of the 100 most cited papers. World Neurosurg 2022; 164:e67-e81. [DOI: 10.1016/j.wneu.2022.03.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 03/28/2022] [Indexed: 11/20/2022]
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13
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Sprenghers L, Lemmens R, van Loon J. Usefulness of intraoperative monitoring in microvascular decompression for hemifacial spasm: a systematic review and meta-analysis. Br J Neurosurg 2022; 36:346-357. [PMID: 35313771 DOI: 10.1080/02688697.2022.2049701] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
OBJECTIVE To review the diagnostic accuracy and possible added value of Brainstem Auditory Evoked Potentials (BAEP) monitoring and Lateral Spread Response (LSR) monitoring in microvascular decompression surgery for hemifacial spasms. METHODS For this systematic review we followed the PRISMA guidelines. We searched different databases and bibliographies of articles. We included studies on BAEP and LSR monitoring that reported data on hearing outcome or efficacy. Selected studies were assessed for bias using the MINORS tool. RESULTS 64 articles were selected for qualitative synthesis, 42 met inclusion criteria for meta-analysis. The overall incidence of hearing loss was 3.4%. For BAEP monitoring AUC and pooled OR with 95% confidence interval were 0.911 (0.753-0.933) and 7.99 (3.85-16.60) respectively. Short-term data on LSR monitoring showed an overall spasm relief rate of 89% with pooled OR, sensitivity and specificity with a 95% confidence interval of 8.80 (4.82-16.08), 0.911 (0.863-0.943) and 0.451 (0.342-0.564) respectively. Long-term data on LSR monitoring showed an overall spasm relief rate of 95% with pooled OR, sensitivity and specificity with a 95% confidence interval of 4.06 (2.15-7.64), 0.871 (0.817-0.911) and 0.39 (0.294-0.495) respectively. CONCLUSION The alarm criteria, a wave V latency prolongation of 1ms or a wave V amplitude decrement of 50%, proposed by the 'American Clinical Neurophysiology Society' are a sensitive predictor for postoperative hearing loss. Other BAEP wave changes, for example, complete loss of wave V, are more specific but correspond to irreversible damage and are therefore not useful as warning criteria. LSR monitoring has high diagnostic accuracy at short-term follow-up. At long-term follow-up, diagnostic accuracy decreases because most patients get spasm relief regardless of their LSR status. LSR persistence after surgery has a good long-term outcome, as long as an extensive exploration of the facial nerve has been performed.
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Affiliation(s)
| | - Robin Lemmens
- Department of Neurology, University Hospital Leuven, University of Leuven, Leuven, Belgium
| | - Johannes van Loon
- Department of Neurosurgery, University Hospital Leuven and Laboratory of Experimental Neurosurgery and Neuroanatomy, University of Leuven, Leuven, Belgium
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Fernández-Conejero I, Ulkatan S, Deletis V. Monitoring cerebellopontine angle and skull base surgeries. HANDBOOK OF CLINICAL NEUROLOGY 2022; 186:163-176. [PMID: 35772885 DOI: 10.1016/b978-0-12-819826-1.00016-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Cerebellopontine angle (CPA) surgery represents a challenge for neurosurgeons due to the high risk of iatrogenic injury of vital neurological structures. Therefore, important efforts in improving the surgical techniques and intraoperative neurophysiology have been made in the last decades. We present a description and review of the available methodologies for intraoperative neuromonitoring and mapping during CPA surgeries. There are three main groups of techniques to assess the functional integrity of the nervous structures in danger during these surgical procedures: (1) Electrical identification or mapping of motor cranial nerves (CNs), which is essential in order to locate the nerve in their different parts during the tumor resection; (2) Monitoring, which provides real-time information about functional integrity of the nervous tissue; and (3) Brainstem reflexes including blink reflex, masseteric reflex, and laryngeal adductor reflex. All these methods facilitate the removal of lesions and contribute to notable improvement in functional outcome and permit on the investigation of their physiopathology in certain neurosurgically treated diseases. Such is the case of hemifacial spasm (HFS). We describe the methodology to evaluate the efficacy of microvascular decompression for HFS treatment at the end of this chapter.
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Affiliation(s)
- Isabel Fernández-Conejero
- Unit of Intraoperative Neurophysiology, Department of Neurology, University hospital of Bellvitge, Barcelona, Spain.
| | - Sedat Ulkatan
- Department of Neurosurgery, Mount Sinai Hospital, New York, NY, United States
| | - Vedran Deletis
- Department of Neurosurgery, University Hospital Dubrava, Zagreb, Croatia; Albert Einstein College of Medicine, New York, NY, United States
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15
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Szelényi A, Fernández-Conejero I, Kodama K. Surgery and intraoperative neurophysiologic monitoring for aneurysm clipping. HANDBOOK OF CLINICAL NEUROLOGY 2022; 186:375-393. [PMID: 35772896 DOI: 10.1016/b978-0-12-819826-1.00008-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This chapter describes the feasibility, utilization, and value of intraoperative neurophysiologic monitoring (IONM) in cerebrovascular cases. Practical advice on the integration of these adjunct methods into the modern neurosurgical operating room is based on our own neurophysiologic and neurosurgical experience. Most IONM is done for anterior circulation aneurysms. Somatosensory and motor evoked potentials are the modalities of choice covering vascular territories of the internal, anterior, and middle cerebral arteries. While monitoring both hemispheres with the unoperated side as control, monitoring focus is laid upon those territories at risk and bearing the aneurysm. The specificity of IONM is close to 1, and sensitivity ranges from 0.2 to 1, depending on the categorization of transient changes. The overall likelihood of worsened neurologic outcome after any intraoperative signal deterioration (transient or permanent) is 0.4.
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Affiliation(s)
- Andrea Szelényi
- Department of Neurosurgery, University Hospital, Ludwig-Maximilians-University (LMU), Munich, Germany.
| | - Isabel Fernández-Conejero
- Unit of Intraoperative Neurophysiology, Department of Neurology, University Hospital of Bellvitge, Barcelona, Spain
| | - Kunihiko Kodama
- Department of Neurosurgery, Shinshu University School of Medicine, Matsumoto, Japan
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Zhang Y, Ren H, Jia G, Zhang L, Fan G, Bi Q, Yu Y. Predictive values of maximum changes of brainstem auditory evoked potentials during microvascular decompression for hemifacial spasm. Acta Neurochir (Wien) 2020; 162:2823-2832. [PMID: 32385638 DOI: 10.1007/s00701-020-04379-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 04/29/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND Brainstem auditory evoked potentials (BAEPs) have been widely monitored to prevent hearing loss (HL) during microvascular decompression (MVD) for hemifacial spasm (HFS); however, their predictive value is still unclear. The aim of this study is to investigate the predictive values of the maximum changes in BAEPs and define the best warning indicator and a cutoff value (CV) during HFS-MVD. METHODS The clinical data of 93 HFS-MVD patients were retrospectively analysed. The maximum change rates of the latency and amplitude of waves I, III, and V and the interpeak latencies (IPLs) I-III, I-V, and III-V, when BAEPs change most during MVD, were defined. Pure tone audiometry was performed to evaluate hearing loss (HL). Logistic regression, propensity score, receiver operating curve (ROC), and area under the curve (AUC) were used to identify the predictive value of relevant indexes and to determine the CV (with the largest Youden index) of the best index at different levels of HL. RESULTS The AUCs of BAEPs for predicting HL were 0.98, 0.92, and 0.84 for 50 dB, 30 dB, and 10 dB, respectively. The amplitude of wave V (AwV) was the best single predictive index at all three HL levels. The CV of AwV was 55% (50 dB), 46% (30 dB), and 34% (10 dB). At 50 dB HL, the predictive value of IPLs I-V (AUC 0.89 with CV 0.6 ms) was better than that of LwV (AUC 0.82 with CV 1 ms). CONCLUSION BAEPs can predict HL well. AwV is the best single predictive index of all BAEPs. The reduction of AwV by 34% (watching), 46% (reporting), and 55% (warning) can be used as a sliding-scale warning sign. In addition, IPLs I-V (> 0.6 ms) and LwV (> 1 ms) should also be observed and reported during MVD.
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Affiliation(s)
- Yulian Zhang
- Department of Neurosurgery, Peking University China-Japan Friendship School of Clinical Medicine, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China
- Department of Neurosurgery, China-Japan Friendship Hospital, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China
| | - Hongxiang Ren
- Department of Neurosurgery, China-Japan Friendship Hospital, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China
| | - Ge Jia
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
| | - Li Zhang
- Department of Neurosurgery, Peking University China-Japan Friendship School of Clinical Medicine, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China
- Department of Neurosurgery, China-Japan Friendship Hospital, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China
- Department of Neurosurgery, Graduate School of Peking Union Medical College, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China
| | - Guohui Fan
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China
| | - Qingling Bi
- Department of Otolaryngology, China-Japan Friendship Hospital, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China
| | - Yanbing Yu
- Department of Neurosurgery, Peking University China-Japan Friendship School of Clinical Medicine, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China.
- Department of Neurosurgery, China-Japan Friendship Hospital, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China.
- Department of Neurosurgery, Graduate School of Peking Union Medical College, No. 2, Yinghua East Street, ChaoYang District, Beijing, 100029, China.
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Significance of wave I loss of brainstem auditory evoked potentials during microvascular decompression surgery for hemifacial spasm. Clin Neurophysiol 2020; 131:809-815. [DOI: 10.1016/j.clinph.2019.12.409] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 11/27/2019] [Accepted: 12/05/2019] [Indexed: 11/20/2022]
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Hypertension and Diabetes Are Associated With Clinical Characteristics in Patients Undergoing Microvascular Decompression for Hemifacial Spasm. J Craniofac Surg 2019; 31:468-471. [PMID: 31842083 DOI: 10.1097/scs.0000000000006049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVES The aim of the present study is to investigate effect of hypertension and diabetes on neuroelectrophysiology, outcomes and complications in patients with hemifacial spasm (HFS) treated by microvascular decompression (MVD). METHODS From June 2014 to December 2016, 476 consecutive HFS patients who had undergone MVD were divided into 2 groups according to the presence or absence of comorbidities: diabetic group (n = 26) versus non-diabetic group (n = 450), and hypertensive group (n = 141) versus normotensive group (n = 335). Relevant patient data, including preoperative and postoperative neuroelectrophysiology, operative findings, outcome of MVD and complications, were collected and analyzed retrospectively over the 2-year follow-up period. The impact of hypertension and diabetes on the clinical features of HFS patients was investigated by using logistic regression models. RESULTS Brainstem auditory evoked potential (BAEP), postoperative prognosis and abnormal muscle response (AMR) were not different between any of the 2 groups. Preoperative positive AMR occurred more frequently in the nondiabetic group than diabetic group [OR = 0.202, P = 0.004], whereas hypertension was not independently predictive for neuroelectrophysiology in patients with HFS. Adjusted multivariate analysis indicated that hypertension was the only clinical factor associated with MVD-related complications [OR = 0.482, P = 0.007] and hearing impairment [OR = 0.28, P = 0.004] after various potential confounders were taken into account, whereas diabetes was not predictive for postoperative complications. CONCLUSIONS Diabetes is associated with low positive rate of preoperative AMR, thus weakening the predictive role of AMR for successful MVD. Hypertension may be an independent risk factor for hearing impairment after MVD.
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Min L, Liu M, Zhang W, Tao B, Sun Q, Li S, Wang X. Outcomes and Safety of Overlapping Surgery in Patients Undergoing Microvascular Decompression for Hemifacial Spasm and Trigeminal Neuralgia. World Neurosurg 2019; 130:e1084-e1090. [DOI: 10.1016/j.wneu.2019.07.092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 07/08/2019] [Accepted: 07/09/2019] [Indexed: 10/26/2022]
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Park SK, Joo BE, Park K. Intraoperative Neurophysiological Monitoring during Microvascular Decompression Surgery for Hemifacial Spasm. J Korean Neurosurg Soc 2019; 62:367-375. [PMID: 31290293 PMCID: PMC6616990 DOI: 10.3340/jkns.2018.0218] [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: 11/27/2018] [Accepted: 04/04/2019] [Indexed: 12/02/2022] Open
Abstract
Hemifacial spasm (HFS) is due to the vascular compression of the facial nerve at its root exit zone (REZ). Microvascular decompression (MVD) of the facial nerve near the REZ is an effective treatment for HFS. In MVD for HFS, intraoperative neurophysiological monitoring (INM) has two purposes. The first purpose is to prevent injury to neural structures such as the vestibulocochlear nerve and facial nerve during MVD surgery, which is possible through INM of brainstem auditory evoked potential and facial nerve electromyography (EMG). The second purpose is the unique feature of MVD for HFS, which is to assess and optimize the effectiveness of the vascular decompression. The purpose is achieved mainly through monitoring of abnormal facial nerve EMG that is called as lateral spread response (LSR) and is also partially possible through Z-L response, facial F-wave, and facial motor evoked potentials. Based on the information regarding INM mentioned above, MVD for HFS can be considered as a more safe and effective treatment.
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Affiliation(s)
- Sang-Ku Park
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Byung-Euk Joo
- Department of Neurology, Myongji Hospital, Hanyang University Medical Center, Goyang, Korea
| | - Kwan Park
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Lee MH, Lee S, Park SK, Lee JA, Park K. Delayed hearing loss after microvascular decompression for hemifacial spasm. Acta Neurochir (Wien) 2019; 161:503-508. [PMID: 30569226 DOI: 10.1007/s00701-018-3774-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 12/11/2018] [Indexed: 11/27/2022]
Abstract
BACKGROUND This study aimed to analyze cases of delayed hearing loss after microvascular decompression (MVD) for hemifacial spasm and identify the characteristic features of these patients. METHODS We retrospectively reviewed the medical records of 3462 patients who underwent MVD for hemifacial spasm between January 1998 and August 2017. RESULTS Among these, there were 5 cases in which hearing was normal immediately postoperatively but delayed hearing loss occurred. None of the 5 patients reported any hearing disturbance immediately after the operation. However, they developed hearing problems suddenly after some time (median, 22 days; range 10-45 days). On examination, sensorineural hearing loss was confirmed. High-dose corticosteroid treatment was prescribed. Preoperative hearing levels were restored after several months (median duration from the time of the operation, 45 days; range 22-118 days). Interestingly, the inter-peak latency of waves I-III in the brainstem auditory evoked potential (BAEP) was prolonged during the surgery, but recovered within a short time. CONCLUSION Delayed hearing loss may occur after MVD for HFS. Prolongation of the inter-peak latency of waves I-III seems to be associated with the occurrence of delayed hearing loss. It is possible that BAEP changes may predict delayed hearing loss, but confirmatory evidence is not available as yet. Analysis of more cases is necessary to determine the utility of BAEP monitoring to predict delayed hearing loss after MVD and to identify its exact cause.
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Affiliation(s)
- Min Ho Lee
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Seunghoon Lee
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Sang-Ku Park
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University, School of Medicine, Seoul, South Korea
| | - Jeong-A Lee
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Kwan Park
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea.
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Bartindale M, Mohamed A, Bell J, Kircher M, Hill J, Anderson D, Leonetti J. Neurotologic Complications Following Microvascular Decompression: A Retrospective Study. J Neurol Surg B Skull Base 2019; 81:37-42. [PMID: 32021748 DOI: 10.1055/s-0039-1677688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 12/05/2018] [Indexed: 10/27/2022] Open
Abstract
Objective The main purpose of this article is to determine the frequency of neurotologic complications after posterior fossa microvascular decompression (MVD) surgery. Design Retrospective case review. Setting Tertiary care referral center. Participants A total of 215 consecutive MVD operations by a single surgeon between March 1996 and May 2016 were reviewed with 192 surgeries on 183 patients meeting inclusion criteria. Main Outcome Measures Neurotologic complications secondary to MVD. Results The 52 males and 131 females had a mean age of 58.52 years (range, 28-92 years). Indications for MVD were trigeminal neuralgia ( n = 162), hemifacial spasm ( n = 23), glossopharyngeal neuralgia ( n = 13), vagal palsy ( n = 1), and tinnitus ( n = 1). The outcomes examined were postoperative hearing loss, tinnitus, vertigo, and hemifacial paresis. At least one of these complications was present in 17.7% of patients. There were 4.17% with permanent hearing loss, 6.77% with transient hearing loss, 5.21% with tinnitus, 5.73% with vertigo, and 0.52% with hemifacial paresis. There was no significant difference in complication rates based on surgical indication. Conclusions Neurotologic complications are a significant risk when performing MVD. It is important for otolaryngologists as well as neurosurgeons to be aware of such complications. We recommend perioperative audiometry in all patients undergoing MVD and believe there is utility in routine otolaryngologist involvement.
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Affiliation(s)
- Matthew Bartindale
- Department of Otolaryngology - Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, United States
| | - Ayah Mohamed
- Department of Otolaryngology - Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, United States
| | - Jason Bell
- Department of Otolaryngology - Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, United States
| | - Matthew Kircher
- Department of Otolaryngology - Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, United States
| | - Jacqueline Hill
- Department of Neurological Surgery, Loyola University Medical Center, Maywood, Illinois, United States
| | - Douglas Anderson
- Department of Neurological Surgery, Loyola University Medical Center, Maywood, Illinois, United States
| | - John Leonetti
- Department of Otolaryngology - Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, United States
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Hussain MA, Konteas A, Sunderland G, Franceschini P, Byrne P, Osman-Farah J, Eldridge P. Re-Exploration of Microvascular Decompression in Recurrent Trigeminal Neuralgia and Intraoperative Management Options. World Neurosurg 2018; 117:e67-e74. [DOI: 10.1016/j.wneu.2018.05.147] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 05/20/2018] [Accepted: 05/22/2018] [Indexed: 11/25/2022]
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Dumot C, Sindou M. Veins of the Cerebellopontine Angle and Specific Complications of Sacrifice, with Special Emphasis on Microvascular Decompression Surgery. A Review. World Neurosurg 2018; 117:422-432. [PMID: 29966798 DOI: 10.1016/j.wneu.2018.06.160] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 06/18/2018] [Accepted: 06/19/2018] [Indexed: 02/07/2023]
Abstract
Good knowledge of the anatomy of veins is of crucial importance for the functional surgery of cranial nerve (CN) disorders, especially microvascular decompression for trigeminal neuralgia (TN), hemifacial spasm (HFS), and vagoglossopharyngeal neuralgia (VGPN). Although controversial, veins may be involved in neurovascular conflicts and may constitute dangerous obstacles to access to the CNs. With the aim of estimating the implications of veins in those diseases and evaluating the linked surgical difficulties, we carried out a review of the literature from 2000 to the end of February 2018. For this review, articles found on PubMed that gave enough precision about veins were retained (39 articles on TN, 38 on HFS, 8 on VGPN, and 26 on complications related to venous sacrifices). Before this review, we described a simplified anatomic classification of veins, amenable to easing the surgical approach to CNs. Access to the trigeminal nerve, via the infratentorial-supracerebellar route, is almost always affected by the superficial superior petrosal venous system, whereas access to the facial and cochleovestibular complex as well as to the lower CNs, through the infrafloccular trajectory, is almost always exempt of important venous obstacles. Respective incidences of venous compression at the origin of hyperactive CN syndromes are given. The percentages of a venous conflict alone were calculated at 10.8% for TN, 0.1% for HFS, and 2.9% for VGPN. We review the complications considered in relation with venous sacrifices. Precautions to minimize these complications are given.
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Affiliation(s)
- Chloé Dumot
- Hôpital neurologique Pierre Wertheimer, Lyon, France; Université Lyon 1, Lyon, France.
| | - Marc Sindou
- Université Lyon 1, Lyon, France; Groupe ELSAN, Clinique Bretéché, Nantes, France
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Amagasaki K, Watanabe S, Hosono A, Nakaguchi H. Mobilization of the Anterior/Posterior Inferior Cerebellar Artery on the Cerebellar Surface in Microvascular Decompression Surgery for Hemifacial Spasm: Potential Effect on Hearing Preservation. Oper Neurosurg (Hagerstown) 2018; 16:179-185. [DOI: 10.1093/ons/opy128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 04/27/2018] [Indexed: 11/14/2022] Open
Abstract
Abstract
BACKGROUND
The infrafloccular approach in microvascular decompression (MVD) for hemifacial spasm (HFS) reduces the risk of postoperative hearing impairment. However, location of the anterior/posterior inferior cerebellar artery (AICA/PICA) on the cerebellar surface in the surgical route requires mobilization to maintain the approach direction for the protection of hearing function.
OBJECTIVE
To evaluate the effectiveness of mobilization of the AICA/PICA on the cerebellar surface in the surgical route.
METHODS
Retrospective review of 101 patients dividing their cases into 2 groups, the mobilized group and nonmobilized group. Surgical results, brainstem auditory evoked potentials (BAEPs), age, and duration of microsurgery were compared. In the mobilized group, whether the artery was responsible for the HFS or not, and whether the artery branched perforators to the cerebellar surface or choroid plexus or not, were analyzed.
RESULTS
No permanent hearing impairment occurred in any patient. The AICA/PICA was mobilized in 26 patients. No significant difference was found in surgical results, BAEP findings, and duration of microsurgery between the 2 groups, but age was younger in the mobilized group (P < .01). The mobilized artery was responsible in 14 cases and branched perforators in 7 cases in the mobilized group. The perforators did not obstruct mobilization.
CONCLUSION
Mobilization of the AICA/PICA from the cerebellar surface is a useful technique to maintain the infrafloccular approach in MVD for HFS. This technique reduces the risk of postoperative hearing impairment.
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Affiliation(s)
| | - Saiko Watanabe
- Department of Neurosurgery, Mitsui Memorial Hospital, Tokyo, Japan
| | - Atushi Hosono
- Department of Neurosurgery, Mitsui Memorial Hospital, Tokyo, Japan
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El Damaty A, Rosenstengel C, Matthes M, Baldauf J, Dziemba O, Hosemann W, Schroeder HWS. A New Score to Predict the Risk of Hearing Impairment After Microvascular Decompression for Hemifacial Spasm. Neurosurgery 2018; 81:834-843. [PMID: 28973677 DOI: 10.1093/neuros/nyx111] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 06/28/2017] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Intraoperative monitoring of brainstem auditory evoked potentials (BAEPs) has been implemented to reduce the risk of hearing impairment during microvascular decompression for hemifacial spasm. OBJECTIVE To evaluate intraoperative monitoring of BAEPs during microvascular decompression in patients with hemifacial spasm for predicting the risk of hearing impairment after surgery. METHODS This prospective study included 100 patients. BAEPs were recorded for all patients. We established a scoring system for the changes in wave I amplitude, I-III interpeak latency, and wave V amplitude and latency. For each change, total points were calculated, and a score out of 6 was assigned to every patient. We classified the patients based on the points scored into 3 risk groups: low-risk (0-3), medium-risk (4-5), and high-risk (6). Further, the correlation between the score and the hearing outcome was evaluated to detect the incidence and degree of hearing impairment. RESULTS Eighty-seven patients scored 0 to 3, 10 scored 4 to 5, and 3 scored 6. The degree of hearing impairment was proportionate to the score recorded at the end of surgery, and patients in the low-risk group showed no impairment; medium-risk group, deterioration of maximum 2 grades according to World Health Organization classification of hearing impairment; and high-risk group, deterioration of 3 to 4 grades. CONCLUSION Intraoperative monitoring of BAEPs evaluated through our scoring system was valuable in predicting hearing impairment after surgery.
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Affiliation(s)
- Ahmed El Damaty
- Department of Neurosurgery, Cairo University, Cairo, Egypt.,Department of Neurosurgery, Greifswald University Medicine, Greifswald, Germany
| | | | - Marc Matthes
- Department of Neurosurgery, Greifswald University Medicine, Greifswald, Germany
| | - Joerg Baldauf
- Department of Neurosurgery, Greifswald University Medicine, Greifswald, Germany
| | - Oliver Dziemba
- Department of ENT, Head and Neck Surgery, Greifswald University of Medicine, Greifswald, Germany
| | - Werner Hosemann
- Department of ENT, Head and Neck Surgery, Greifswald University of Medicine, Greifswald, Germany
| | - Henry W S Schroeder
- Department of Neurosurgery, Greifswald University Medicine, Greifswald, Germany
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Sindou M, Mercier P. Microvascular decompression for hemifacial spasm : Surgical techniques and intraoperative monitoring. Neurochirurgie 2018; 64:133-143. [DOI: 10.1016/j.neuchi.2018.04.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 02/22/2018] [Accepted: 04/06/2018] [Indexed: 11/30/2022]
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Park SK, Joo BE, Lee S, Lee JA, Hwang JH, Kong DS, Seo DW, Park K, Lee HT. The critical warning sign of real-time brainstem auditory evoked potentials during microvascular decompression for hemifacial spasm. Clin Neurophysiol 2018; 129:1097-1102. [DOI: 10.1016/j.clinph.2017.12.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 10/20/2017] [Accepted: 12/11/2017] [Indexed: 11/30/2022]
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Sindou M, Mercier P. Microvascular decompression for hemifacial spasm: Outcome on spasm and complications. A review. Neurochirurgie 2018; 64:106-116. [DOI: 10.1016/j.neuchi.2018.01.001] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 12/28/2017] [Accepted: 01/07/2018] [Indexed: 11/25/2022]
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To warn or not to warn: A reappraisal of brainstem auditory evoked potential warning criteria during surgery. Clin Neurophysiol 2018; 129:1053-1055. [PMID: 29500046 DOI: 10.1016/j.clinph.2018.02.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 02/01/2018] [Indexed: 11/24/2022]
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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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Jung NY, Chang JW. Surgical Management of Hemifacial Spasm and Meige Syndrome. Neuromodulation 2018. [DOI: 10.1016/b978-0-12-805353-9.00078-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bartindale M, Kircher M, Adams W, Balasubramanian N, Liles J, Bell J, Leonetti J. Hearing Loss following Posterior Fossa Microvascular Decompression: A Systematic Review. Otolaryngol Head Neck Surg 2018; 158:62-75. [PMID: 28895459 PMCID: PMC7147641 DOI: 10.1177/0194599817728878] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 08/09/2017] [Indexed: 11/17/2022]
Abstract
Objectives (1) Determine the prevalence of hearing loss following microvascular decompression (MVD) for trigeminal neuralgia (TN) and hemifacial spasm (HFS). (2) Demonstrate factors that affect postoperative hearing outcomes after MVD. Data Sources PubMed-NCBI, Scopus, CINAHL, and PsycINFO databases from 1981 to 2016. Review Methods Systematic review of prospective cohort studies and retrospective reviews in which any type of hearing loss was recorded after MVD for TN or HFS. Three researchers extracted data regarding operative indications, procedures performed, and diagnostic tests employed. Discrepancies were resolved by mutual consensus. Results Sixty-nine references with 18,233 operations met inclusion criteria. There were 7093 patients treated for TN and 11,140 for HFS. The overall reported prevalence of hearing loss after MVD for TN and HFS was 5.58% and 8.25%, respectively. However, many of these studies relied on subjective measures of reporting hearing loss. In 23 studies with consistent perioperative audiograms, prevalence of hearing loss was 13.47% for TN and 13.39% for HFS, with no significant difference between indications ( P = .95). Studies using intraoperative brainstem auditory evoked potential monitoring were more likely to report hearing loss for TN (relative risk [RR], 2.28; P < .001) but not with HFS (RR, 0.88; P = .056). Conclusion Conductive and sensorineural hearing loss are important complications following posterior fossa MVD. Many studies have reported on hearing loss using either subjective measures and/or inconsistent audiometric testing. Routine perioperative audiogram protocols improve the detection of hearing loss and may more accurately represent the true risk of hearing loss after MVD for TN and HFS.
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Affiliation(s)
- Matthew Bartindale
- Department of Otolaryngology–Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, USA
| | - Matthew Kircher
- Department of Otolaryngology–Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, USA
| | - William Adams
- Clinical Research Office—Division of Biostatistics, Loyola University Medical Center, Maywood, Illinois, USA
| | - Neelam Balasubramanian
- Clinical Research Office—Division of Biostatistics, Loyola University Medical Center, Maywood, Illinois, USA
| | - Jeffrey Liles
- Department of Otolaryngology–Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, USA
| | - Jason Bell
- Department of Otolaryngology–Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, USA
| | - John Leonetti
- Department of Otolaryngology–Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, USA
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Ghali MGZ, Srinivasan VM, Viswanathan A. Microvascular Decompression for Hemifacial Spasm. Int Ophthalmol Clin 2018; 58:111-121. [PMID: 29239883 DOI: 10.1097/iio.0000000000000209] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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Jung NY, Lee SW, Park CK, Chang WS, Jung HH, Chang JW. Hearing Outcome Following Microvascular Decompression for Hemifacial Spasm: Series of 1434 Cases. World Neurosurg 2017; 108:566-571. [DOI: 10.1016/j.wneu.2017.09.053] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 09/08/2017] [Accepted: 09/09/2017] [Indexed: 10/18/2022]
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Failed microvascular decompression surgery for hemifacial spasm: a retrospective clinical study of reoperations. Acta Neurochir (Wien) 2017; 159:259-263. [PMID: 27817006 DOI: 10.1007/s00701-016-3006-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 10/20/2016] [Indexed: 10/20/2022]
Abstract
BACKGROUND To investigate the repeat microvascular decompression on hemifacial spasm patients who failed the first MVD. METHODS Twenty-six patients underwent late redo MVD in our institution from January 1, 2011 to December 31, 2015. The clinical features, surgical findings, outcomes, and complications of the repeat MVD were analyzed retrospectively. RESULTS Twenty-four (92.3 %) patients were cured immediately after the redo MVD. Delayed relief was found in two (7.7 %) patients; it took 6 days and 2 weeks for them to obtain complete relief. No recurrence was found during follow-up. Surgical complications including three (11.5 %) facial paralysis and one (3.8 %) hearing loss. CONCLUSIONS We suggested that repeat MVD can be performed 2 years after the first MVD if the spasm was not resolved. Repeat MVD for HFS is effective.
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Deletis V, Fernández-Conejero I. Intraoperative Monitoring and Mapping of the Functional Integrity of the Brainstem. J Clin Neurol 2016; 12:262-73. [PMID: 27449909 PMCID: PMC4960209 DOI: 10.3988/jcn.2016.12.3.262] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 01/23/2016] [Accepted: 01/26/2016] [Indexed: 12/02/2022] Open
Abstract
The risk of iatrogenic damage is very high in surgical interventions in or around the brainstem. However, surgical techniques and intraoperative neuromonitoring (ION) have evolved sufficiently to increase the likelihood of successful functional outcomes in many patients. We present a critical review of the methodologies available for intraoperative monitoring and mapping of the brainstem. There are three main groups of techniques that can be used to assess the functional integrity of the brainstem: 1) mapping, which provides rapid anatomical identification of neural structures using electrical stimulation with a hand-held probe, 2) monitoring, which provides real-time information about the functional integrity of the nervous tissue, and 3) techniques involving the examination of brainstem reflexes in the operating room, which allows for the evaluation of the reflex responses that are known to be crucial for most brainstem functions. These include the blink reflex, which is already in use, and other brainstem reflexes that are being explored, such as the masseter H-reflex. This is still under development but is likely to have important functional consequences. Today an abundant armory of ION methods is available for the monitoring and mapping of the functional integrity of the brainstem during surgery. ION methods are essential in surgery either in or around the brainstem; they facilitate the removal of lesions and contribute to notable improvements in the functional outcomes of patients.
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Affiliation(s)
- Vedran Deletis
- Laboratory for Human and Experimental Neurophysiology, School of Medicine, Split, Croatia.
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Joo BE, Park SK, Cho KR, Kong DS, Seo DW, Park K. Real-time intraoperative monitoring of brainstem auditory evoked potentials during microvascular decompression for hemifacial spasm. J Neurosurg 2016; 125:1061-1067. [PMID: 26824371 DOI: 10.3171/2015.10.jns151224] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The aim of this study was to define a new protocol for intraoperative monitoring (IOM) of brainstem auditory evoked potentials (BAEPs) during microvascular decompression (MVD) surgery to treat hemifacial spasm (HFS) and to evaluate the usefulness of this new protocol to prevent hearing impairment. METHODS To define the optimal stimulation rate, estimate the number of trials to be averaged, and identify useful warning criteria in IOM of BAEPs, the authors performed a preliminary study of 13 patients with HFS in 2010. They increased the stimulation rate from 10.1 Hz/sec to 100.1 Hz/sec by 10-Hz increments, and they elevated the average time from 100 times to 1000 times by 100-unit increments at a fixed stimulus rate of 43.9 Hz. After defining the optimal stimulation rate and the number of trials that needed to be averaged for IOM of BAEPs, they also identified the useful warning criteria for this protocol for MVD surgery. From January to December 2013, 254 patients with HFS underwent MVD surgery following the new IOM of BAEPs protocol. Pure-tone audiometry and speech discrimination scoring were performed before surgery and 1 week after surgery. To evaluate the usefulness of the new protocol, the authors compared the incidence of postoperative hearing impairment with the results from the group that underwent MVD surgery prior to the new protocol. RESULTS Through a preliminary study, the authors confirmed that it was possible to obtain a reliable wave when using a stimulation rate of 43.9 Hz/sec and averaging 400 trials. Only a Wave V amplitude loss > 50% was useful as a warning criterion when using the new protocol. A reliable BAEP could be obtained in approximately 9.1 seconds. When the new protocol was used, 2 patients (0.8%) showed no recovery of Wave V amplitude loss > 50%, and only 1 of those 2 patients (0.39%) ultimately had postoperative hearing impairment. When compared with the outcomes in the pre-protocol group, hearing impairment incidence decreased significantly among patients who underwent surgery with the new protocol (0.39% vs 4.02%, p = 0.002). There were no significant differences between the 2 surgery groups regarding other complications, including facial palsy, sixth cranial nerve palsy, and vocal cord palsy. CONCLUSIONS There was a significant decrease in postoperative hearing impairment after MVD for HFS when the new protocol for IOM of BAEPs was used. Real-time IOM of BAEPs, which can obtain a reliable BAEP in less than 10 seconds, is a successful new procedure for preventing hearing impairment during MVD surgery for HFS.
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Affiliation(s)
| | | | - Kyung-Rae Cho
- Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Doo-Sik Kong
- Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | | | - Kwan Park
- Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Thirumala P, Meigh K, Dasyam N, Shankar P, Sarma KRK, Sarma DRK, Habeych M, Crammond D, Balzer J. The incidence of high-frequency hearing loss after microvascular decompression for trigeminal neuralgia, glossopharyngeal neuralgia, or geniculate neuralgia. J Neurosurg 2015; 123:1500-6. [DOI: 10.3171/2014.10.jns141101] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT
The primary aim of this study was to evaluate the incidence and discuss the pathogenesis of high-frequency hearing loss (HFHL) after microvascular decompression (MVD) for trigeminal neuralgia (TGN), glossopharyngeal neuralgia (GPN), or geniculate neuralgia (GN).
METHODS
The authors analyzed preoperative and postoperative audiogram data and brainstem auditory evoked potentials (BAEPs) from 93 patients with TGN, 6 patients with GPN, and 8 patients with GN who underwent MVD. Differences in pure tone audiometry > 10 dB at frequencies of 0.25, 0.5, 1, 2, 4, and 8 kHz were calculated preoperatively and postoperatively for both the ipsilateral and the contralateral sides. Intraoperative monitoring records were analyzed and compared with the incidence of HFHL, which was defined as a change in pure tone audiometry > 10 dB at frequencies of 4 and 8 kHz.
RESULTS
The incidence of HFHL was 30.84% on the side ipsilateral to the surgery and 20.56% on the contralateral side. Of the 47 patients with HFHL, 20 had conductive hearing loss, and 2 experienced nonserviceable hearing loss after the surgery. The incidences of HFHL on the ipsilateral side at 4 and 8 kHz were 17.76% and 25.23%, respectively, and 8.41% and 15.89%, respectively, on the contralateral side. As the audiometric frequency increased, the number of patients with hearing loss increased. No significant postoperative difference was found between patients with and without HFHL in intraoperative BAEP waveforms. Sex, age, and affected side were not associated with an increase in the incidence of hearing loss.
CONCLUSIONS
High-frequency hearing loss occurred after MVD for TGN, GPN, or GN, and the greatest incidence occurred on the ipsilateral side. This hearing loss may be a result of drill-induced noise and/or transient loss of cerebrospinal fluid during the course of the procedure. Changes in intraoperative BAEP waveforms were not useful in predicting HFHL after MVD. Repeated postoperative audiological examinations may be useful in assessing the prognosis of HFHL.
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Affiliation(s)
| | - Kristin Meigh
- 3Schools of Emergency Medicine and Medicine, University of Pittsburgh, Pennsylvania
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Sindou M, Mahmoudi M, Brînzeu A. Hypertension of neurogenic origin: effect of microvascular decompression of the CN IX-X root entry/exit zone and ventrolateral medulla on blood pressure in a prospective series of 48 patients with hemifacial spasm associated with essential hypertension. J Neurosurg 2015; 123:1405-13. [DOI: 10.3171/2014.12.jns141775] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT
In spite of solid anatomical and physiological arguments and the promising results of Jannetta in the 1970s, treating essential hypertension by microvascular decompression (MVD) of the brainstem has not gained acceptance as a mainstream technique. The main reason has been a lack of established selection criteria. Because of this, the authors' attempts have been limited to patients referred for MVD for hemifacial spasm (HFS) who also had hypertension likely to be related to neurovascular compression (NVC).
METHODS
Of 201 patients referred for HFS, 48 (23.8%) had associated hypertension. All had high-resolution MR images that demonstrated NVC. All underwent MVD of the root exit/entry zone (REZ) of the ninth and tenth cranial nerves (CN IX-X) and adjacent ventrolateral medulla in addition to the CN VII REZ. Effects on hypertension, graded using the WHO classification, were studied up to the latest follow-up, which was 2–16 years from the time of surgery, 7 years on average. Also, effects of MVD on blood pressure (BP) according to the side of vascular compression were evaluated.
RESULTS
Preoperatively, hypertension was severe in all but 1 of the patients; in spite of medical treatment, 47 patients still had WHO Grade 1 or 2 hypertension, and 18 still had unstable BP. After MVD, at latest follow-up, BP had returned to normal (i.e., systolic pressure < 140 mm Hg) in 28 patients; 14 of these patients (29.10% of the whole series) were able to maintain normal BP without any antihypertensive treatment; the other 14 still required some medication to maintain their BP below 140 mm Hg (p < 0.0001). Also, at latest follow-up, BP remained unstable in only 8 of the 18 patients with instability prior to MVD (p < 0.02). Analysis according to side of compression showed that of the 30 patients with left-sided compression, 17 had their BP normalized (without medication in 11 cases), and of the 18 patients with right-sided compression, 11 had their BP normalized (without medication in 3 cases). The difference between sides was not significant.
CONCLUSIONS
These results argue for considering MVD for the treatment of hypertension likely to be due to NVC at the CN IX-X REZ and adjacent ventrolateral medulla. Criteria for selecting patients with hypertension alone still need to be established and could include the following indications: apparently essential hypertension, likely to be neurogenic, in patients in whom high-resolution MRI shows clear-cut images of NVC at the CN IX-X REZ and adjacent ventrolateral medulla and in whom BP cannot be controlled by medical treatment.
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Affiliation(s)
- Marc Sindou
- 1Department of Neurosurgery, University of Lyon 1, Hôpital Neurologique “Pierre Wertheimer,” Lyon, France
| | - Mohamed Mahmoudi
- 1Department of Neurosurgery, University of Lyon 1, Hôpital Neurologique “Pierre Wertheimer,” Lyon, France
- 2Section of Neurosurgery, Regional Military Hospital of Oran (HMRUO), Oran, Algeria; and
| | - Andrei Brînzeu
- 1Department of Neurosurgery, University of Lyon 1, Hôpital Neurologique “Pierre Wertheimer,” Lyon, France
- 3University of Medicine “Victor Babes,” Timisoara, Romania
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Postoperative complications of microvascular decompression for hemifacial spasm: lessons from experience of 2040 cases. Neurosurg Rev 2015; 39:151-8; discussion 158. [DOI: 10.1007/s10143-015-0666-7] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Revised: 04/11/2015] [Accepted: 04/27/2015] [Indexed: 11/29/2022]
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Thirumala P, Frederickson AM, Balzer J, Crammond D, Habeych ME, Chang YF, Sekula RF. Reduction in high-frequency hearing loss following technical modifications to microvascular decompression for hemifacial spasm. J Neurosurg 2015; 123:1059-64. [PMID: 26162037 DOI: 10.3171/2014.12.jns141699] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT Microvascular decompression is a safe and effective procedure to treat hemifacial spasm, but the operation poses some risk to the patient's hearing. While severe sensorineural hearing loss across all frequencies occurs at a low rate in experienced hands, a recent study suggests that as many as one-half of patients who undergo this procedure may experience ipsilateral high-frequency hearing loss (HFHL), and as many as one-quarter may experience contralateral HFHL. While it has been suggested that drill-related noise may account for this finding, this study was designed to examine the effect of a number of techniques designed to protect the vestibulocochlear nerve from operative manipulation on the incidence of HFHL. METHODS Pure-tone audiometry was performed both preoperatively and postoperatively on 67 patients who underwent microvascular decompression for hemifacial spasm during the study period. A change of greater than 10 dB at either 4 kHz or 8 kHz was considered to be HFHL. Additionally, the authors analyzed intraoperative brainstem auditory evoked potentials from this patient cohort. RESULTS The incidence of ipsilateral HFHL in this cohort was 7.4%, while the incidence of contralateral HFHL was 4.5%. One patient (1.5%; also included in the HFHL group) experienced an ipsilateral nonserviceable hearing loss. CONCLUSIONS The reduced incidence of HFHL in this study suggests that technical modifications including performing the procedure without the use of fixed retraction may greatly reduce, but not eliminate, the occurrence of HFHL following microvascular decompression for hemifacial spasm.
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Affiliation(s)
- Parthasarathy Thirumala
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Andrew M Frederickson
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Jeffrey Balzer
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Donald Crammond
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Miguel E Habeych
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Yue-Fang Chang
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Raymond F Sekula
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
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Ying T, Thirumala P, Gardner P, Habeych M, Crammond D, Balzer J. The Incidence of Early Postoperative Conductive Hearing Loss after Microvascular Decompression of Hemifacial Spasm. J Neurol Surg B Skull Base 2015; 76:411-5. [PMID: 26682118 DOI: 10.1055/s-0034-1390402] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 08/11/2014] [Indexed: 10/23/2022] Open
Abstract
Objectives To evaluate the incidence and discuss the pathogenesis of early postoperative conductive hearing loss (CHL) after microvascular decompression (MVD) for hemifacial spasm (HFS). Design Pre- and postoperative audiogram data and brainstem auditory evoked potentials (BAEPs) from patients who had underwent MVD for HFS were analyzed. Setting The study was conducted at the University of Pittsburgh Medical Center. Participants MVD for HFS patients who had pre- and postoperative audiogram data, BAEP data, and normal structure of the external and middle ear were included in the study. Main Outcome Measures CHL was diagnosed if there was an air-bone gap in pure tone audiometry of at least 10 dB at 0.5, 1, 2, or 4 kHz. Results The incidence of early postoperative CHL in the ipsilateral ear was 18.7% postoperatively. No CHL was observed in the contralateral side. No significant relationship between CHL and intraoperative BAEP changes was found. Demographic parameters were not significantly different between groups with and without CHL. Conclusions Early postoperative CHL is a significant complication after MVD. Fluid entering the mastoid air cells and/or bone-dust deposition during craniotomy may result in CHL. Long-term audiograms will be needed to evaluate the risk factors that lead to permanent CHL.
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Affiliation(s)
- Tingting Ying
- Department of Neurological Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Parthasarathy Thirumala
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States ; Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Paul Gardner
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Miguel Habeych
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Donald Crammond
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Jeffrey Balzer
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
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Hearing outcomes after loss of brainstem auditory evoked potentials during microvascular decompression. J Clin Neurosci 2015; 22:659-63. [DOI: 10.1016/j.jocn.2014.10.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 10/15/2014] [Indexed: 11/20/2022]
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Amagasaki K, Watanabe S, Naemura K, Nakaguchi H. Microvascular decompression for hemifacial spasm: how can we protect auditory function? Br J Neurosurg 2015; 29:347-52. [DOI: 10.3109/02688697.2014.1003033] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Lee MH, Lee HS, Jee TK, Jo KI, Kong DS, Lee JA, Park K. Cerebellar retraction and hearing loss after microvascular decompression for hemifacial spasm. Acta Neurochir (Wien) 2015; 157:337-43. [PMID: 25514867 DOI: 10.1007/s00701-014-2301-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Accepted: 12/01/2014] [Indexed: 10/24/2022]
Abstract
BACKGROUND This retrospective study evaluated the length of cerebellar retraction and the changes of intraoperative brainstem auditory evoked potential (BAEP) during microvascular decompression (MVD), and assessed the predictive value of the hearing loss as a prognostic indicator for the treatment outcome of hemifacial spasm (HFS). METHODS This series included 1,518 consecutive patients affected with HFS who underwent MVD, during which BAEP was monitored. Patients were divided into two groups based on whether hearing loss occurred following decompression or not. Each patient underwent a similar procedure performed by one neurosurgeon. The two patients groups were matched with regard to sex, age, and degree of spasm. RESULTS Among the 1,518 patients, 106 (6.98 %) displayed functional hearing changes. Hearing loss was permanent in 12 patients (0.79 %). Of the 1,412 patients with stationary hearing compared with preoperative audiometry, 96 patients were selected who were individually matched with respect to sex, age, and degree of spasm. BAEP changed immediately after cerebellar retraction in 7 of 12 hearing-loss patients, suggesting the importance of retraction on hearing outcomes. The distance from the cerebellar surface of the petrous temporal bone to the neurovascular compression point was measured. The median distance of cerebellar retraction in the hearing-loss group was 13.77 mm, which was longer than the median distance in the control group. CONCLUSIONS Preoperative measurement of the cerebellar retraction distance can be a valuable clue to predict and prevent postoperative hearing loss in MVD for HFS.
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Sindou M. Is there a place for microsurgical vascular decompression of the brainstem for apparent essential blood hypertension? a review. Adv Tech Stand Neurosurg 2015; 42:69-76. [PMID: 25411145 DOI: 10.1007/978-3-319-09066-5_4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
There are anatomical and physiological evidences that the ventrolateral (VL) region of the medulla plays an important role in blood pressure regulation and that dysfunction at this level may generate hypertension (HT). Vascular compression by a megadolicho-artery from the vertebrobasilar arterial system at the root entry/exit zone (REZ) of the glossopharyngeal (IXth) and vagal (Xth) cranial nerves (CNs) and the adjacent VL aspect of the medulla has been postulated as a causal factor for HT from neurogenic origin. The first attempts at microvascular decompression (MVD) of the IX-Xth CNs together with the neighbouring VL brainstem was revealed promising. These surgical attempts, as well as the numerous MRI studies, with the goal to detect and identify likely responsible neurovascular conflicts (NVC), are reviewed. Established criteria for indication of MVD as an aetiological treatment of apparent essential HT are still needed.
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Affiliation(s)
- Marc Sindou
- Department of Neurosurgery, Hopital Neurologique Pierre Wertheimer, University Lyon 1, G.H.E, 59 Boulevard Pinel, Lyon, 69003, France,
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Hemifacial spasm and neurovascular compression. ScientificWorldJournal 2014; 2014:349319. [PMID: 25405219 PMCID: PMC4227371 DOI: 10.1155/2014/349319] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 09/19/2014] [Accepted: 09/24/2014] [Indexed: 12/15/2022] Open
Abstract
Hemifacial spasm (HFS) is characterized by involuntary unilateral contractions of the muscles innervated by the ipsilateral facial nerve, usually starting around the eyes before progressing inferiorly to the cheek, mouth, and neck. Its prevalence is 9.8 per 100,000 persons with an average age of onset of 44 years. The accepted pathophysiology of HFS suggests that it is a disease process of the nerve root entry zone of the facial nerve. HFS can be divided into two types: primary and secondary. Primary HFS is triggered by vascular compression whereas secondary HFS comprises all other causes of facial nerve damage. Clinical examination and imaging modalities such as electromyography (EMG) and magnetic resonance imaging (MRI) are useful to differentiate HFS from other facial movement disorders and for intraoperative planning. The standard medical management for HFS is botulinum neurotoxin (BoNT) injections, which provides low-risk but limited symptomatic relief. The only curative treatment for HFS is microvascular decompression (MVD), a surgical intervention that provides lasting symptomatic relief by reducing compression of the facial nerve root. With a low rate of complications such as hearing loss, MVD remains the treatment of choice for HFS patients as intraoperative technique and monitoring continue to improve.
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Viability of intraoperative auditory steady state responses during intracranial surgery. J Clin Neurophysiol 2014; 31:344-51. [PMID: 25083846 DOI: 10.1097/wnp.0000000000000083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND For intraoperative monitoring of auditory nerve function, the auditory steady-state response (ASSR) analysis may be an alternative to brain stem auditory evoked potentials, offering frequency specificity and short detection times. Clinical studies investigating the viability of ASSR under total intravenous anesthesia have not been performed. METHODS During craniotomy under total intravenous anesthesia with propofol and remifentanil in 20 patients, ASSR were recorded. An additional control patient undergoing cerebellopontine angle surgery was included, in whom the auditory nerve could not be preserved. One-minute sinus tones (500, 1,000, 2,000 Hz) were applied with 60-, 70-, and 80-decibel hearing level. Stimuli were amplitude modulated with 40, 90, or 110 Hz and applied monaurally to the left and right ears. Time to detect a significant response and response amplitudes at 40, 90, or 110 Hz in the evoked EEG spectra was evaluated. RESULTS Overall, 90-Hz ASSR were successfully detected in all 20 patients, 110 Hz in 18 patients, and 40 Hz in 14 patients after a median of 10 seconds. No ASSR could be detected in the control patient at the end of the surgical procedure. Time-to-significance and ASSR amplitudes were influenced by stimulus intensity, carrier, and modulation frequency (Scheirer-Ray-Hare test, P < 0.005). Ipsilateral responses were higher than contralateral (P < 0.0001). CONCLUSIONS In conclusion, 90- and 110-Hz ASSR can be reliably detected under total intravenous anesthesia. Our results are in line with those from previous studies in awake patients. Auditory steady-state response during anesthesia may enable intraoperative frequency-specific audiometry and monitoring of the auditory nerve.
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Zhong J, Zhu J, Sun H, Dou NN, Wang YN, Ying TT, Xia L, Liu MX, Tao BB, Li ST. Microvascular decompression surgery: surgical principles and technical nuances based on 4000 cases. Neurol Res 2014; 36:882-93. [PMID: 24597913 DOI: 10.1179/1743132814y.0000000344] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
BACKGROUND As an etiological treatment of trigeminal neuralgia (TN) and hemifacial spasm (HFS), microvascular decompression (MVD) has been popularized around the world. However, as a functional operation in the cerebellopontine angle (CPA), this process can be risky and the postoperative outcomes might not be good enough sometimes. OBJECTIVE In order to obtain a better result with less complication, this surgery should be further addressed. METHODS With experience of more than 4000 MVDs, we have gained knowledge about the operative technique. Through abundant intraoperative photos, each step of the procedure was demonstrated in detail and the surgical strategy was focused. RESULTS The principle of MVD is to separate the nerve-vessel confliction rather than isolate it with prostheses. A prompt identification of the conflict site is important, which hinges on a good exposure. A satisfactory working space can be established by an appropriate positioning of the patient's head and a proper craniectomy as well as a rational approach. A sharp dissection of arachnoids leads to a maximal visualization of the entire intracranial course of the nerve root. All the vessels contacting the trigeminal or facial nerve should be treated. Intraoperative electrophysiological mentoring is helpful to distinguish the offending artery for hemifacial cases. CONCLUSION MVD is an effective treatment for the patient with TN or HFS. Immediate relief can be achieved by an experienced neurosurgeon with good knowledge of regional anatomy. A safe surgery is the tenet of MVD, and accordingly, no single step of the procedure should be ignored.
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