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Amlong C, Rusy D, Sanders RD, Lake W, Raz A. Dexmedetomidine depresses neuronal activity in the subthalamic nucleus during deep brain stimulation electrode implantation surgery. BJA OPEN 2022; 3:100088. [PMID: 37588575 PMCID: PMC10430856 DOI: 10.1016/j.bjao.2022.100088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 08/03/2022] [Indexed: 08/18/2023]
Abstract
Background Micro-electrode recordings are often necessary during electrode implantation for deep brain stimulation of the subthalamic nucleus. Dexmedetomidine may be a useful sedative for these procedures, but there is limited information regarding its effect on neural activity in the subthalamic nucleus and on micro-electrode recording quality. Methods We recorded neural activity in five patients undergoing deep brain stimulation implantation to the subthalamic nucleus. Activity was recorded after subthalamic nucleus identification while patients received dexmedetomidine sedation (loading - 1 μg kg-1 over 10-15 min, maintenance - 0.7 μg kg-1 h-1). We compared the root-mean square (RMS) and beta band (13-30 Hz) oscillation power of multi-unit activity recorded by microelectrode before, during and after recovery from dexmedetomidine sedation. RMS was normalised to values recorded in the white matter. Results Multi-unit activity decreased during sedation in all five patients. Mean normalised RMS decreased from 2.8 (1.5) to 1.6 (1.1) during sedation (43% drop, p = 0.056). Beta band power dropped by 48.4%, but this was not significant (p = 0.15). Normalised RMS values failed to return to baseline levels during the time allocated for the study (30 min). Conclusions In this small sample, we demonstrate that dexmedetomidine decreases neuronal firing in the subthalamic nucleus as expressed in the RMS of the multi-unit activity. As multi-unit activity is a factor in determining the subthalamic nucleus borders during micro-electrode recordings, dexmedetomidine should be used with caution for sedation during these procedures. Clinical trial number NCT01721460.
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Affiliation(s)
- Corey Amlong
- Department of Anesthesiology, University of Wisconsin, Madison, WI, USA
| | - Deborah Rusy
- Department of Anesthesiology, University of Wisconsin, Madison, WI, USA
| | - Robert D. Sanders
- University of Sydney, Sydney, Australia
- Department of Anaesthetics, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Wendell Lake
- Department of Neurosurgery, University of Wisconsin, Madison, WI, USA
| | - Aeyal Raz
- Department of Anesthesiology, Rambam Health Care Campus, Haifa, Israel
- The Ruth and Bruce Rappaport Faculty of Medicine, Technion – Israel Institute of Technology, Haifa, Israel
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Sinclair NC, McDermott HJ, Lee WL, Xu SS, Acevedo N, Begg A, Perera T, Thevathasan W, Bulluss KJ. Electrically evoked and spontaneous neural activity in the subthalamic nucleus under general anesthesia. J Neurosurg 2022; 137:449-458. [PMID: 34891136 DOI: 10.3171/2021.8.jns204225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 08/09/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Deep brain stimulation (DBS) surgery is commonly performed with the patient awake to facilitate assessments of electrode positioning. However, awake neurosurgery can be a barrier to patients receiving DBS. Electrode implantation can be performed with the patient under general anesthesia (GA) using intraoperative imaging, although such techniques are not widely available. Electrophysiological features can also aid in the identification of target neural regions and provide functional evidence of electrode placement. Here we assess the presence and positional variation under GA of spontaneous beta and high-frequency oscillation (HFO) activity, and evoked resonant neural activity (ERNA), a novel evoked response localized to the subthalamic nucleus. METHODS ERNA, beta, and HFO were intraoperatively recorded from DBS leads comprising four individual electrodes immediately after bilateral awake implantation into the subthalamic nucleus of 21 patients with Parkinson's disease (42 hemispheres) and after subsequent GA induction deep enough to perform pulse generator implantation. The main anesthetic agent was either propofol (10 patients) or sevoflurane (11 patients). RESULTS GA reduced the amplitude of ERNA, beta, and HFO activity (p < 0.001); however, ERNA amplitudes remained large in comparison to spontaneous local field potentials. Notably, a moderately strong correlation between awake ERNA amplitude and electrode distance to an "ideal" therapeutic target within dorsal STN was preserved under GA (awake: ρ = -0.73, adjusted p value [padj] < 0.001; GA: ρ = -0.69, padj < 0.001). In contrast, correlations were diminished under GA for beta (awake: ρ = -0.45, padj < 0.001; GA: ρ = -0.13, padj = 0.12) and HFO (awake: ρ = -0.69, padj < 0.001; GA: ρ = -0.33, padj < 0.001). The largest ERNA occurred at the same electrode (awake vs GA) for 35/42 hemispheres (83.3%) and corresponded closely to the electrode selected by the clinician for chronic therapy at 12 months (awake ERNA 77.5%, GA ERNA 82.5%). The largest beta amplitude occurred at the same electrode (awake vs GA) for only 17/42 (40.5%) hemispheres and 21/42 (50%) for HFO. The electrode measuring the largest awake beta and HFO amplitudes corresponded to the electrode selected by the clinician for chronic therapy at 12 months in 60% and 70% of hemispheres, respectively. However, this correspondence diminished substantially under GA (beta 20%, HFO 35%). CONCLUSIONS ERNA is a robust electrophysiological signal localized to the dorsal subthalamic nucleus subregion that is largely preserved under GA, indicating it could feasibly guide electrode implantation, either alone or in complementary use with existing methods.
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Affiliation(s)
- Nicholas C Sinclair
- 1Bionics Institute, East Melbourne
- 2Medical Bionics Department, The University of Melbourne, East Melbourne
| | - Hugh J McDermott
- 1Bionics Institute, East Melbourne
- 2Medical Bionics Department, The University of Melbourne, East Melbourne
| | | | - San San Xu
- 1Bionics Institute, East Melbourne
- 3Department of Neurology, Austin Hospital, Heidelberg
| | | | | | - Thushara Perera
- 1Bionics Institute, East Melbourne
- 2Medical Bionics Department, The University of Melbourne, East Melbourne
| | - Wesley Thevathasan
- 1Bionics Institute, East Melbourne
- 3Department of Neurology, Austin Hospital, Heidelberg
- 5Department of Medicine, The University of Melbourne, Parkville
| | - Kristian J Bulluss
- 1Bionics Institute, East Melbourne
- 6Department of Neurosurgery, St. Vincent's and Austin Hospitals, Melbourne; and
- 7Department of Surgery, The University of Melbourne, Heidelberg, Victoria, Australia
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Erdman HB, Kornilov E, Kahana E, Zarchi O, Reiner J, Socher A, Strauss I, Firman S, Israel Z, Bergman H, Tamir I. Asleep DBS under ketamine sedation: Proof of concept. Neurobiol Dis 2022; 170:105747. [PMID: 35550159 DOI: 10.1016/j.nbd.2022.105747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/28/2022] [Accepted: 05/05/2022] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Deep brain stimulation (DBS) is commonly and safely performed for selective Parkinson's disease patients. Many centers perform DBS lead positioning exclusively under local anesthesia, to optimize brain microelectrode recordings (MER) and testing of stimulation-related therapeutic and side effects. These measures enable physiological identification of the DBS borders and subdomains based on electrophysiological properties like firing rates and patterns, intra-operative evaluation of therapeutic window, and improvement of lead placement accuracy. Nevertheless, due to the challenges of awake surgery, some centers use sedation or general anesthesia, despite the distortion of discharge properties and interference with clinical testing, resulting in potential impact on surgical outcomes. Thus, there is a need for a novel anesthesia regimen that enables sedation without compromising intra-operative monitoring. OBJECTIVE This open-label study investigates the use of low-dose ketamine for conscious sedation during microelectrode recordings and lead positioning in subthalamic nucleus (STN) DBS for Parkinson's disease patients. METHODS Three anesthetic regimens were retrospectively compared in 38 surgeries (74 MER trajectories, 5962 recording sites) across three DBS centers: 1) Interleaved propofol-ketamine (PK), 2) Interleaved propofol-awake (PA), and 3) Fully awake (AA). RESULTS All anesthesia regimens achieved satisfactory MER. Detection of STN borders and subdomains by expert electrophysiologist was similar between the groups. Electrophysiological signature of the STN under ketamine was not inferior to either control group. All patients completed stimulation testing. CONCLUSIONS This study supports a low-dose ketamine anesthesia regimen for DBS which allows microelectrode recordings and stimulation testing that are not inferior to those conducted under awake and propofol-awake regimens and may optimize patient experience. A prospective double-blind study that would also compare patients' satisfaction level and clinical outcome should be performed to confirm these findings.
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Affiliation(s)
- Halen Baker Erdman
- Department of Medical Neurobiology, Hebrew University, Jerusalem, Israel.
| | - Evgeniya Kornilov
- Department of Anesthesiology, Rabin Medical Center, Beilinson Hospital, Petach Tikvah, Israel; Department of Neurobiology, Weizmann Institute of Science, Rehovot, Israel
| | - Eilat Kahana
- Department of Anesthesiology, Rabin Medical Center, Beilinson Hospital, Petach Tikvah, Israel
| | - Omer Zarchi
- Intraoperative Neurophysiology Unit, Rabin Medical Center, Beilinson Hospital, Petach Tikvah, Israel
| | - Johnathan Reiner
- Department of Neurology, Rabin Medical Center, Beilinson Hospital, Petach Tikvah, Israel
| | - Achinoam Socher
- Department of Neurology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ido Strauss
- Department of Neurosurgery, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Shimon Firman
- Department of Anesthesiology, Critical Care Medicine, and Pain Management, Hadassah Medical Center, Hebrew University, Jerusalem, Israel
| | - Zvi Israel
- Department of Neurosurgery, Hadassah Medical Center, Hebrew University, Jerusalem, Israel
| | - Hagai Bergman
- Department of Medical Neurobiology, Hebrew University, Jerusalem, Israel; Department of Neurosurgery, Hadassah Medical Center, Hebrew University, Jerusalem, Israel; The Edmond and Lily Safra Center for Brain Sciences, Hebrew University, Jerusalem, Israel
| | - Idit Tamir
- Department of Neurosurgery, Rabin Medical Center, Beilinson Hospital, Petach Tikvah, Israel.
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Fernández-García C, Monje MH, Gómez-Mayordomo V, Foffani G, Herranz R, Catalán MJ, González-Hidalgo M, Matias-Guiu J, Alonso-Frech F. Long-term directional deep brain stimulation: Monopolar review vs. local field potential guided programming. Brain Stimul 2022; 15:727-736. [DOI: 10.1016/j.brs.2022.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 01/16/2022] [Accepted: 04/20/2022] [Indexed: 11/02/2022] Open
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Vesper J, Mainzer B, Senemmar F, Schnitzler A, Groiss SJ, Slotty PJ. Anesthesia for deep brain stimulation system implantation: adapted protocol for awake and asleep surgery using microelectrode recordings. Acta Neurochir (Wien) 2022; 164:1175-1182. [PMID: 35212799 PMCID: PMC8967743 DOI: 10.1007/s00701-021-05108-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 12/28/2021] [Indexed: 11/27/2022]
Abstract
Purpose Deep brain stimulation (DBS), an effective treatment for movement disorders, usually involves lead implantation while the patient is awake and sedated. Recently, there has been interest in performing the procedure under general anesthesia (asleep). This report of a consecutive cohort of DBS patients describes anesthesia protocols for both awake and asleep procedures. Methods Consecutive patients with Parkinson’s disease received subthalamic nucleus (STN) implants either moderately sedated or while intubated, using propofol and remifentanil. Microelectrode recordings were performed with up to five trajectories after discontinuing sedation in the awake group, or reducing sedation in the asleep group. Clinical outcome was compared between groups with the UPDRS III. Results The awake group (n = 17) received 3.5 mg/kg/h propofol and 11.6 μg/kg/h remifentanil. During recording, all anesthesia was stopped. The asleep group (n = 63) initially received 6.9 mg/kg/h propofol and 31.3 μg/kg/h remifentanil. During recording, this was reduced to 3.1 mg/kg/h propofol and 10.8 μg/kg/h remifentanil. Without parkinsonian medications or stimulation, 3-month UPDRS III ratings (ns = 16 and 52) were 40.8 in the awake group and 41.4 in the asleep group. Without medications but with stimulation turned on, ratings improved to 26.5 in the awake group and 26.3 in the asleep group. With both medications and stimulation, ratings improved further to 17.6 in the awake group and 15.3 in the asleep group. All within-group improvements from the off/off condition were statistically significant (all ps < 0.01). The degree of improvement with stimulation, with or without medications, was not significantly different in the awake vs. asleep groups (ps > 0.05). Conclusion The above anesthesia protocols make possible an asleep implant procedure that can incorporate sufficient microelectrode recording. Together, this may increase patient comfort and improve clinical outcomes.
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Affiliation(s)
- Jan Vesper
- Department of Functional Neurosurgery and Stereotaxy, Medical Faculty, Heinrich-Heine University Düsseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.
| | - Bernd Mainzer
- Department of Anesthesia and Intensive Care Medicine, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Farhad Senemmar
- Department of Neurology & Institute for Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Alfons Schnitzler
- Department of Neurology & Institute for Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Stefan Jun Groiss
- Department of Neurology & Institute for Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Philipp J Slotty
- Department of Functional Neurosurgery and Stereotaxy, Medical Faculty, Heinrich-Heine University Düsseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany
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Chen YC, Kuo CC, Chen SY, Chen TY, Pan YH, Wang PK, Tsai ST. Median Nerve Stimulation Facilitates the Identification of Somatotopy of the Subthalamic Nucleus in Parkinson’s Disease Patients under Inhalational Anesthesia. Biomedicines 2021; 10:biomedicines10010074. [PMID: 35052754 PMCID: PMC8772994 DOI: 10.3390/biomedicines10010074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/24/2021] [Accepted: 12/28/2021] [Indexed: 11/18/2022] Open
Abstract
Deep brain stimulation (DBS) improves Parkinson’s disease (PD) symptoms by suppressing neuropathological oscillations. These oscillations are also modulated by inhalational anesthetics used during DBS surgery in some patients, influencing electrode placement accuracy. We sought to evaluate a method that could avoid these effects. We recorded subthalamic nucleus (STN) neuronal firings in 11 PD patients undergoing DBS under inhalational anesthesia. Microelectrode recording (MER) during DBS was collected under median nerve stimulation (MNS) delivered at 5, 20, and 90 Hz frequencies and without MNS. We analyzed the spike firing rate and neuronal activity with power spectral density (PSD), and assessed correlations between the neuronal oscillation parameters and clinical motor outcomes. No patient experienced adverse effects during or after DBS surgery. PSD analysis revealed that peripheral 20 Hz MNS produced significant differences in the dorsal and ventral subthalamic nucleus (STN) between the beta band oscillation (16.9 ± 7.0% versus 13.5 ± 4.8%, respectively) and gamma band oscillation (56.0 ± 13.7% versus 66.3 ± 9.4%, respectively) (p < 0.05). Moreover, 20-Hz MNS entrained neural oscillation over the dorsal STN, which correlated positively with motor disabilities. MNS allowed localization of the sensorimotor STN and identified neural characteristics under inhalational anesthesia. This paradigm may help identify an alternative method to facilitate STN identification and DBS surgery under inhalational anesthesia.
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Affiliation(s)
- Yu-Chen Chen
- Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan; (Y.-C.C.); (S.-Y.C.); (Y.-H.P.)
- Department of Medical Informatics, Tzu Chi University, Hualien 970, Taiwan
| | - Chang-Chih Kuo
- Department of Physiology and Master Program in Medical Physiology, Tzu Chi University, Hualien 970, Taiwan;
| | - Shin-Yuan Chen
- Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan; (Y.-C.C.); (S.-Y.C.); (Y.-H.P.)
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan;
| | - Tsung-Ying Chen
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan;
- Department of Anesthesiology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
| | - Yan-Hong Pan
- Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan; (Y.-C.C.); (S.-Y.C.); (Y.-H.P.)
| | - Po-Kai Wang
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan;
- Department of Anesthesiology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
- Correspondence: (P.-K.W.); (S.-T.T.)
| | - Sheng-Tzung Tsai
- Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan; (Y.-C.C.); (S.-Y.C.); (Y.-H.P.)
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan;
- Correspondence: (P.-K.W.); (S.-T.T.)
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Bos MJ, Buhre W, Temel Y, Joosten EAJ, Absalom AR, Janssen MLF. Effect of Anesthesia on Microelectrode Recordings During Deep Brain Stimulation Surgery: A Narrative Review. J Neurosurg Anesthesiol 2021; 33:300-307. [PMID: 31913866 DOI: 10.1097/ana.0000000000000673] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 12/04/2019] [Indexed: 12/31/2022]
Abstract
Deep brain stimulation (DBS) is an effective surgical treatment for patients with various neurological and psychiatric disorders. Clinical improvements rely on careful patient selection and accurate electrode placement. A common method for target localization is intraoperative microelectrode recording (MER). To facilitate MER, DBS surgery is traditionally performed under local or regional anesthesia. However, sedation or general anesthesia is sometimes needed for patients who are unable to tolerate the procedure fully awake because of severe motor symptoms, psychological distress, pain, or other forms of discomfort. The effect of anesthetic drugs on MER is controversial but likely depends on the type and dose of a particular anesthetic agent, underlying disease, and surgical target. In this narrative review, we provide an overview of the current literature on the anesthetic drugs most often used for sedation and anesthesia during DBS surgery, with a focus on their effects on MERs.
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Affiliation(s)
- Michaël J Bos
- Departments of Anesthesiology and Pain Medicine
- School for Mental Health and Neuroscience, Maastricht University, Maastricht
| | | | - Yasin Temel
- Neurosurgery
- School for Mental Health and Neuroscience, Maastricht University, Maastricht
| | - Elbert A J Joosten
- Departments of Anesthesiology and Pain Medicine
- School for Mental Health and Neuroscience, Maastricht University, Maastricht
| | - Anthony R Absalom
- Department of Anesthesiology, University Medical Center Groningen, Groningen, The Netherlands
| | - Marcus L F Janssen
- Neurology
- Clinical Neurophysiology, Maastricht University Medical Center
- School for Mental Health and Neuroscience, Maastricht University, Maastricht
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Jiang N, Ling YT, Yang C, Liu Y, Xian WB, Zhang LN, Guo QQ, Jin XY, Wu B, Zhang CM, Chen L, Zhang ZG, Liu JL. Optimized Propofol Anesthesia Increases Power of Subthalamic Neuronal Activity in Patients with Parkinson's Disease Undergoing Deep Brain Stimulation. Neurol Ther 2021; 10:785-802. [PMID: 34095990 PMCID: PMC8571439 DOI: 10.1007/s40120-021-00259-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/22/2021] [Indexed: 11/25/2022] Open
Abstract
Introduction Propofol is a general anesthetic option for deep brain stimulation (DBS) of the subthalamic nucleus (STN) of patients with Parkinson's disease (PD). However, its effects on STN activity and neuropsychological outcomes are controversial. The optimal propofol anesthesia for asleep DBS is unknown. This study investigated the safety and effectiveness of an optimized propofol anesthesia regimen in asleep DBS. Methods This retrospective study enrolled 68 PD patients undergoing bilateral STN-DBS surgery. All patients received local scalp anesthesia, with (asleep group, n = 35) or without (awake group, n = 33) propofol-remifentanil general anesthesia by target-controlled infusion under electroencephalogram monitoring. The primary outcome was subthalamic neuronal spiking characterization during microelectrode recording. The secondary outcomes were clinical outcomes including motor, cognition, mind, sleep, and quality of life at 6 months. Results Significantly increased delta and theta power were obtained under propofol anesthesia (awake vs. asleep group, mean ± standard deviation; delta: 31.97 ± 9.87 vs. 39.77 ± 10.56, p < 0.01; theta: 21.09 ± 5.55 vs. 24.82 ± 6.63, p = 0.01). After excluding the influence of confounding factors of age and preoperative motor scores, there was a statistically significant influence on the delta, theta, and alpha power of STN neuronal activity under different anesthesia regimens (delta: β = 2.64, p < 0.01; theta: β = 2.11, p < 0.01; alpha: β = 1.42, p = 0.01). There were no differences in modified burst index, firing rate, tract numbers of microelectrode recording, and other clinical outcomes between the two groups. Conclusion Optimized propofol anesthesia enhanced the delta, theta, and alpha power in STN compared with the awake technique and likely contributed to target recognition under propofol anesthesia. These results demonstrate that propofol is suitable, but needs to be optimized, for asleep STN-DBS. Trial Registration Chinese Clinical Trial Registry Identification number: ChiCTR2100045942. Registered 29 April 2021–Retrospectively registered Supplementary Information The online version contains supplementary material available at 10.1007/s40120-021-00259-y.
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Affiliation(s)
- Nan Jiang
- Department of Anesthesiology, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China
| | - Yu-Ting Ling
- Department of Anesthesiology, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China
| | - Chao Yang
- Department of Neurosurgery, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China
| | - Yi Liu
- Department of Anesthesiology, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China
| | - Wen-Biao Xian
- Department of Neurology, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China
| | - Li-Nan Zhang
- Department of Anesthesiology, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China
| | - Qian-Qian Guo
- Department of Anesthesiology, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China
| | - Xing-Yi Jin
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, Guangdong Province, People's Republic of China
| | - Bin Wu
- Department of Neurosurgery, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China
| | - Chang-Ming Zhang
- Department of Neurosurgery, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China
| | - Ling Chen
- Department of Neurology, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China
| | - Zhi-Guo Zhang
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, Guangdong Province, People's Republic of China
| | - Jin-Long Liu
- Department of Neurosurgery, First Affiliated Hospital of Sun Yat-sen University , Guangzhou, 510080, Guangdong Province, People's Republic of China.
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Martinez-Simon A, Valencia M, Cacho-Asenjo E, Honorato-Cia C, Nuñez-Cordoba JM, Manzanilla O, Aldaz A, Panadero A, Guridi J, Alegre M. Effects of dexmedetomidine on subthalamic local field potentials in Parkinson's disease. Br J Anaesth 2021; 127:245-253. [PMID: 33896591 PMCID: PMC8362272 DOI: 10.1016/j.bja.2021.01.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 12/17/2020] [Accepted: 01/23/2021] [Indexed: 01/06/2023] Open
Abstract
Background Dexmedetomidine is frequently used for sedation during deep brain stimulator implantation in patients with Parkinson's disease, but its effect on subthalamic nucleus activity is not well known. The aim of this study was to quantify the effect of increasing doses of dexmedetomidine in this population. Methods Controlled clinical trial assessing changes in subthalamic activity with increasing doses of dexmedetomidine (from 0.2 to 0.6 μg kg−1 h−1) in a non-operating theatre setting. We recorded local field potentials in 12 patients with Parkinson's disease with bilateral deep brain stimulators (24 nuclei) and compared basal activity in the nuclei of each patient and activity recorded with different doses. Plasma levels of dexmedetomidine were obtained and correlated with the dose administered. Results With dexmedetomidine infusion, patients became clinically sedated, and at higher doses (0.5–0.6 μg kg−1 h−1) a significant decrease in the characteristic Parkinsonian subthalamic activity was observed (P<0.05 in beta activity). All subjects awoke to external stimulus over a median of 1 (range: 0–9) min, showing full restoration of subthalamic activity. Dexmedetomidine dose administered and plasma levels showed a positive correlation (repeated measures correlation coefficient=0.504; P<0.001). Conclusions Patients needing some degree of sedation throughout subthalamic deep brain stimulator implantation for Parkinson's disease can probably receive dexmedetomidine up to 0.6 μg kg−1 h−1 without significant alteration of their characteristic subthalamic activity. If patients achieve a ‘sedated’ state, subthalamic activity decreases, but they can be easily awakened with a non-pharmacological external stimulus and recover baseline subthalamic activity patterns in less than 10 min. Clinical trial registration EudraCT 2016-002680-34; NCT-02982512.
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Affiliation(s)
- Antonio Martinez-Simon
- Department of Anaesthesia, Perioperative Medicine and Critical Care, Clínica Universidad de Navarra, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain.
| | - Miguel Valencia
- University of Navarra, CIMA, Program of Neuroscience, Systems Neuroscience Lab, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | - Elena Cacho-Asenjo
- Department of Anaesthesia, Perioperative Medicine and Critical Care, Clínica Universidad de Navarra, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | - Cristina Honorato-Cia
- Department of Anaesthesia, Perioperative Medicine and Critical Care, Clínica Universidad de Navarra, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | - Jorge M Nuñez-Cordoba
- Research Support Service, Central Clinical Trials Unit, Clínica Universidad de Navarra, Pamplona, Spain
| | - Oscar Manzanilla
- Clinical Neurophysiology Section, Clínica Universidad de Navarra, Pamplona, Spain
| | - Azucena Aldaz
- Department of Pharmacy, Clínica Universidad de Navarra, Pamplona, Spain
| | - Alfredo Panadero
- Department of Anaesthesia, Perioperative Medicine and Critical Care, Clínica Universidad de Navarra, Pamplona, Spain
| | - Jorge Guridi
- Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain; Department of Neurosurgery, Clínica Universidad de Navarra, Pamplona, Spain
| | - Manuel Alegre
- Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain; Clinical Neurophysiology Section, Clínica Universidad de Navarra, Pamplona, Spain
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Bos MJ, de Korte-de Boer D, Alzate Sanchez AM, Duits A, Ackermans L, Temel Y, Absalom AR, Buhre WF, Roberts MJ, Janssen MLF. Impact of Procedural Sedation on the Clinical Outcome of Microelectrode Recording Guided Deep Brain Stimulation in Patients with Parkinson's Disease. J Clin Med 2021; 10:1557. [PMID: 33917205 PMCID: PMC8068017 DOI: 10.3390/jcm10081557] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/01/2021] [Accepted: 04/05/2021] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Subthalamic nucleus (STN) deep brain stimulation (DBS) has become a routine treatment of advanced Parkinson's disease (PD). DBS surgery is commonly performed under local anesthesia (LA) to obtain reliable microelectrode recordings. However, procedural sedation and/or analgesia (PSA) is often desirable to improve patient comfort. The impact of PSA in addition to LA on outcome is largely unknown. Therefore, we performed an observational study to assess the effect of PSA compared to LA alone during STN DBS surgery on outcome in PD patients. METHODS Seventy PD patients (22 under LA, 48 under LA + PSA) scheduled for STN DBS implantation were included. Dexmedetomidine, clonidine or remifentanil were used for PSA. The primary outcome was the change in Movement Disorders Society Unified Parkinson's Disease Rating Score III (MDS-UPDRS III) and levodopa equivalent daily dosage (LEDD) between baseline, one month before surgery, and twelve months postoperatively. Secondary outcome measures were motor function during activities of daily living (MDS-UPDRS II), cognitive alterations and surgical adverse events. Postoperative assessment was conducted in "on" stimulation and "on" medication conditions. RESULTS At twelve months follow-up, UPDRS III and UPDRS II scores in "on" medication conditions were similar between the LA and PSA groups. The two groups showed a similar LEDD reduction and an equivalent decline in executive function measured by the Stroop Color-Word Test, Trail Making Test-B, and verbal fluency. The incidence of perioperative and postoperative adverse events was similar between groups. CONCLUSION This study demonstrates that PSA during STN DBS implantation surgery in PD patients was not associated with differences in motor and non-motor outcome after twelve months compared with LA only.
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Affiliation(s)
- Michael J. Bos
- Department of Anesthesiology and Pain Medicine, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands; (D.d.K.-d.B.); (W.F.B.)
- Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (A.D.); (Y.T.); (M.L.F.J.)
| | - Dianne de Korte-de Boer
- Department of Anesthesiology and Pain Medicine, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands; (D.d.K.-d.B.); (W.F.B.)
| | - Ana Maria Alzate Sanchez
- Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (A.D.); (Y.T.); (M.L.F.J.)
| | - Annelien Duits
- Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (A.D.); (Y.T.); (M.L.F.J.)
- Department of Medical Psychology, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands
| | - Linda Ackermans
- Department of Neurosurgery, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands;
| | - Yasin Temel
- Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (A.D.); (Y.T.); (M.L.F.J.)
- Department of Neurosurgery, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands;
| | - Anthony R. Absalom
- Department of Anesthesiology, University Medical Center Groningen, Groningen University, Hanzeplein 1, 9713 GZ Groningen, The Netherlands;
| | - Wolfgang F. Buhre
- Department of Anesthesiology and Pain Medicine, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands; (D.d.K.-d.B.); (W.F.B.)
- Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (A.D.); (Y.T.); (M.L.F.J.)
| | - Mark J. Roberts
- Faculty of Psychology and Neuroscience, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands;
| | - Marcus L. F. Janssen
- Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (A.D.); (Y.T.); (M.L.F.J.)
- Department of Clinical Neurophysiology, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands
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Abstract
BACKGROUND Microelectrode recordings (MERs) are used during deep brain stimulation surgery (DBS) to optimize patient outcomes and provide a unique method of collecting data regarding neurological conditions. However, MERs can be affected by anesthetics such as dexmedetomidine. Little is known about the effects of dexmedetomidine (DEX) on the globus pallidus interna (GPi), a common target for DBS. The primary aim of this study is to investigate the hypothesis that DEX is associated with alterations in GPi MERs. METHODS We conducted a retrospective analysis comparing MERs from patients with Parkinson's disease (PD) and dystonia who underwent insertion of DBS of the GPi under DEX sedation with those who went through the same procedure without DEX (No DEX). RESULTS Firing rates for GPi neurons in the DEX group were lower (57.44 ± 2.04; mean ± SEM, n = 163 cells) than the No DEX group (69.53 ± 2.06, n = 112 cells, P < 0.0001). Overall, DEX was associated with a greater proportion of GPi cells classified as firing in bursty pattern compared to our No DEX group. (29.41%, n = 153 vs 14.81%, n = 108, P = 0.008). This effect was present for both PD and dystonia patients who underwent the procedure. High doses of DEX were associated with lower firing rates than low doses. CONCLUSIONS Our results suggest that DEX is associated with a decrease in GPi firing rates and are associated with an increase in burstiness. Furthermore, these effects are similar between dystonia and PD patients. Lastly, the effects of DEX may differ between high doses and low doses.
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The role of dexmedetomidine in neurosurgery. Best Pract Res Clin Anaesthesiol 2020; 35:221-229. [PMID: 34030806 DOI: 10.1016/j.bpa.2020.10.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 09/28/2020] [Accepted: 10/13/2020] [Indexed: 01/14/2023]
Abstract
Dexmedetomidine can be used for sedation and analgesia and has been approved for this use by the European Medicines Agency since 2017. It causes an arousable state of sedation, which is beneficial during neurosurgical procedures that require the patient to cooperate with neurological tests (i.e. tumor surgery or implantation of deep brain stimulators). During procedures where monitoring of somatosensory evoked potentials and/or motor evoked potentials is required, dexmedetomidine can be used as an adjunct to general anesthesia with GABAergic drugs to decrease the dose of the latter when these drugs impair the monitoring signals. The use of dexmedetomidine has also been associated with neuroprotective effects and a decreased incidence of delirium, but studies confirming these effects in the peri-operative (neuro-)surgical setting are lacking. Although dexmedetomidine does not cause respiratory depression, its hemodynamic effects are complex and careful patient selection, choice of dose, and monitoring must be performed.
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Abstract
Abstract
Background
General anesthetics-induced changes of electrical oscillations in the basal ganglia may render the identification of the stimulation targets difficult. The authors hypothesized that while sevoflurane anesthesia entrains coherent lower frequency oscillations, it does not affect the identification of the subthalamic nucleus and clinical outcome.
Methods
A cohort of 19 patients with Parkinson’s disease with comparable disability underwent placement of electrodes under either sevoflurane general anesthesia (n = 10) or local anesthesia (n = 9). Microelectrode recordings during targeting were compared for neuronal spiking characteristics and oscillatory dynamics. Clinical outcomes were compared at 5-yr follow-up.
Results
Under sevoflurane anesthesia, subbeta frequency oscillations predominated (general vs. local anesthesia, mean ± SD; delta: 13 ± 7.3% vs. 7.8 ± 4.8%; theta: 8.4 ± 4.1% vs. 3.9 ± 1.6%; alpha: 8.1 ± 4.1% vs. 4.8 ± 1.5%; all P < 0.001). In addition, distinct dorsolateral beta and ventromedial gamma oscillations were detected in the subthalamic nucleus solely in awake surgery (mean ± SD; dorsal vs. ventral beta band power: 20.5 ± 6.6% vs. 15.4 ± 4.3%; P < 0.001). Firing properties of subthalamic neurons did not show significant difference between groups. Clinical outcomes with regard to improvement in motor and psychiatric symptoms and adverse effects were comparable for both groups. Tract numbers of microelectrode recording, active contact coordinates, and stimulation parameters were also equivalent.
Conclusions
Sevoflurane general anesthesia decreased beta-frequency oscillations by inducing coherent lower frequency oscillations, comparable to the pattern seen in the scalp electroencephalogram. Nevertheless, sevoflurane-induced changes in electrical activity patterns did not reduce electrode placement accuracy and clinical effect. These observations suggest that microelectrode-guided deep brain stimulation under sevoflurane anesthesia is a feasible clinical option.
Editor’s Perspective
What We Already Know about This Topic
What This Article Tells Us That Is New
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Bos MJ, Alzate Sanchez AM, Bancone R, Temel Y, de Greef BT, Absalom AR, Gommer ED, van Kranen-Mastenbroek VH, Buhre WF, Roberts MJ, Janssen ML. Influence of Anesthesia and Clinical Variables on the Firing Rate, Coefficient of Variation and Multi-Unit Activity of the Subthalamic Nucleus in Patients with Parkinson's Disease. J Clin Med 2020; 9:jcm9041229. [PMID: 32344572 PMCID: PMC7230272 DOI: 10.3390/jcm9041229] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/16/2020] [Accepted: 04/17/2020] [Indexed: 12/12/2022] Open
Abstract
Background: Microelectrode recordings (MER) are used to optimize lead placement during subthalamic nucleus deep brain stimulation (STN-DBS). To obtain reliable MER, surgery is usually performed while patients are awake. Procedural sedation and analgesia (PSA) is often desirable to improve patient comfort, anxiolysis and pain relief. The effect of these agents on MER are largely unknown. The objective of this study was to determine the effects of commonly used PSA agents, dexmedetomidine, clonidine and remifentanil and patient characteristics on MER during DBS surgery. Methods: Data from 78 patients with Parkinson’s disease (PD) who underwent STN-DBS surgery were retrospectively reviewed. The procedures were performed under local anesthesia or under PSA with dexmedetomidine, clonidine or remifentanil. In total, 4082 sites with multi-unit activity (MUA) and 588 with single units were acquired. Single unit firing rates and coefficient of variation (CV), and MUA total power were compared between patient groups. Results: We observed a significant reduction in MUA, an increase of the CV and a trend for reduced firing rate by dexmedetomidine. The effect of dexmedetomidine was dose-dependent for all measures. Remifentanil had no effect on the firing rate but was associated with a significant increase in CV and a decrease in MUA. Clonidine showed no significant effect on firing rate, CV or MUA. In addition to anesthetic effects, MUA and CV were also influenced by patient-dependent variables. Conclusion: Our results showed that PSA influenced neuronal properties in the STN and the dexmedetomidine (DEX) effect was dose-dependent. In addition, patient-dependent characteristics also influenced MER.
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Affiliation(s)
- Michael J. Bos
- Department of Anesthesiology and Pain Medicine, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands;
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (R.B.); (Y.T.); (B.T.A.d.G.); (E.D.G.); (V.H.J.M.v.K.-M.)
- Correspondence:
| | - Ana Maria Alzate Sanchez
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (R.B.); (Y.T.); (B.T.A.d.G.); (E.D.G.); (V.H.J.M.v.K.-M.)
| | - Raffaella Bancone
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (R.B.); (Y.T.); (B.T.A.d.G.); (E.D.G.); (V.H.J.M.v.K.-M.)
| | - Yasin Temel
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (R.B.); (Y.T.); (B.T.A.d.G.); (E.D.G.); (V.H.J.M.v.K.-M.)
- Department of Neurosurgery, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands
| | - Bianca T.A. de Greef
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (R.B.); (Y.T.); (B.T.A.d.G.); (E.D.G.); (V.H.J.M.v.K.-M.)
- Department of Neurology, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX, Maastricht, The Netherlands
| | - Anthony R. Absalom
- Department of Anesthesiology, Groningen University, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands;
| | - Erik D. Gommer
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (R.B.); (Y.T.); (B.T.A.d.G.); (E.D.G.); (V.H.J.M.v.K.-M.)
- Department of Clinical Neurophysiology, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands
| | - Vivianne H.J.M. van Kranen-Mastenbroek
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (R.B.); (Y.T.); (B.T.A.d.G.); (E.D.G.); (V.H.J.M.v.K.-M.)
- Department of Clinical Neurophysiology, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands
| | - Wolfgang F. Buhre
- Department of Anesthesiology and Pain Medicine, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands;
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (R.B.); (Y.T.); (B.T.A.d.G.); (E.D.G.); (V.H.J.M.v.K.-M.)
| | - Mark J. Roberts
- Faculty of Psychology and Neuroscience, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands;
| | - Marcus L.F. Janssen
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands; (A.M.A.S.); (R.B.); (Y.T.); (B.T.A.d.G.); (E.D.G.); (V.H.J.M.v.K.-M.)
- Department of Clinical Neurophysiology, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands
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Lin YS, Liu KD, Chang C, Yang HZ, Tsou MY, Chu YC. Inhibitory concentration of propofol in combination with dexmedetomidine during microelectrode recording for deep brain stimulator insertion surgeries under general anesthesia. J Chin Med Assoc 2020; 83:188-193. [PMID: 31972830 DOI: 10.1097/jcma.0000000000000248] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Microelectrode recording (MER) for target refinement is widely used in deep brain stimulator insertion for Parkinson disease. Signals may be influenced by anesthetics when patients receive general anesthesia (GA). This study determined the inhibitory concentration (IC) of propofol on MER signals when it was coadministered with dexmedetomidine. METHODS Patients were anesthetized with dexmedetomidine (0.5 μg·kg loading, followed by infusion at 0.4 μg·kgh) and propofol through target-controlled infusion for GA with tracheal intubation. The surgeon conducted the online scoring of the background signals, spiking frequency, amplitude, and pattern of single-unit activities by using a 0-10 verbal numerical rating scale (NRS; 0, maximal suppression; 10, minimal suppression), and responses were grouped into suppression (NRS ≤ 6) and nonsuppression (NRS > 6). The median inhibitory concentration (IC50) of propofol (as target effect-site concentrations: Ceprop) was determined using modified Dixon's up-and-down method. Probit regression analysis was further used to obtain the dose-response relationship, and IC05 and IC95 were calculated. RESULTS Twenty-three adult patients participated in this study. Under the concomitant infusion of dexmedetomidine, the predicted IC50 value (95% CI) of Ceprop for neuronal suppression during MER was 1.29 (1.24-1.34) μg·mL as calculated using modified Dixon's up-and-down method. Using probit analysis, the estimated IC05, IC50, and IC95 values (95% CIs) were 1.17 (0.87-1.23), 1.28 (1.21-1.34), and 1.40 (1.33-1.85) μg·mL, respectively. CONCLUSION Our data provided reference values of propofol for dosage adjustment to avoid interference on MER under GA when anesthetics have to be continuously infused during recording.
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Affiliation(s)
- Yu-Shan Lin
- Department of Anesthesiology, Taipei Veterans General Hospital and National Yang-Ming University, Taipei, Taiwan, ROC
| | - Kang-Du Liu
- Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital and National Yang-Ming University, Taipei, Taiwan, ROC
| | - Chi Chang
- Department of Anesthesiology, Taipei Veterans General Hospital and National Yang-Ming University, Taipei, Taiwan, ROC
| | - Huai-Zhe Yang
- Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital and National Yang-Ming University, Taipei, Taiwan, ROC
| | - Mei-Yung Tsou
- Department of Anesthesiology, Taipei Veterans General Hospital and National Yang-Ming University, Taipei, Taiwan, ROC
| | - Ya-Chun Chu
- Department of Anesthesiology, Taipei Veterans General Hospital and National Yang-Ming University, Taipei, Taiwan, ROC
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Bos MJ, Alzate Sanchez AM, Smeets AYJM, Bancone R, Ackermans L, Absalom AR, Buhre WF, Roberts MJ, Janssen MLF. Effect of Anesthesia on Microelectrode Recordings during Deep Brain Stimulation Surgery in Tourette Syndrome Patients. Stereotact Funct Neurosurg 2019; 97:225-231. [PMID: 31707386 DOI: 10.1159/000503691] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 09/25/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUND Deep brain stimulation (DBS) is an accepted treatment for patients with medication-resistant Tourette syndrome (TS). Sedation is commonly required during electrode implantation to attenuate anxiety, pain, and severe tics. Anesthetic agents potentially impair the quality of microelectrode recordings (MER). Little is known about the effect of these anesthetics on MER in patients with TS. We describe our experience with different sedative regimens on MER and tic severity in patients with TS. METHODS The clinical records of all TS patients who underwent DBS surgery between 2010 and 2018 were reviewed. Demographic data, stimulation targets, anesthetic agents, perioperative complications, and MER from each hemisphere were collected and analyzed. Single-unit activity was identified by filtering spiking activity from broadband MER data and principal component analysis with K-means clustering. Vocal and motor tics which caused artifacts in the MER data were manually selected using visual and auditory inspection. RESULTS Six patients underwent bilateral DBS electrode implantation. In all patients, the target was the anterior internal globus pallidus. Patient comfort and hemodynamic and respiratory stability were maintained with conscious sedation with one or more of the following anesthetic drugs: propofol, midazolam, remifentanil, clonidine, and dexmedetomidine. Good quality MER and clinical testing were obtained in 9 hemispheres of 6 patients. In 3 patients, MER quality was poor on one side. CONCLUSION Cautiously applied sedative drugs can provide patient comfort, hemodynamic and respiratory stability, and suppress severe tics, with minimal interference with MER.
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Affiliation(s)
- Michael J Bos
- Department of Anesthesiology and Pain Medicine, Maastricht University Medical Center, Maastricht, The Netherlands, .,School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands,
| | - Ana Maria Alzate Sanchez
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands.,Department of Neurosurgery, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Anouk Y J M Smeets
- Department of Neurosurgery, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Raffaella Bancone
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Linda Ackermans
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands.,Department of Neurosurgery, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Anthony R Absalom
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Wolfgang F Buhre
- Department of Anesthesiology and Pain Medicine, Maastricht University Medical Center, Maastricht, The Netherlands.,School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Mark J Roberts
- Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Marcus L F Janssen
- School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands.,Department of Neurology and Clinical Neurophysiology, Maastricht University Medical Center, Maastricht, The Netherlands
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Magrassi L, Zippo AG, Azzalin A, Bastianello S, Imberti R, Biella GEM. Single unit activities recorded in the thalamus and the overlying parietal cortex of subjects affected by disorders of consciousness. PLoS One 2018; 13:e0205967. [PMID: 30403761 PMCID: PMC6221278 DOI: 10.1371/journal.pone.0205967] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 09/30/2018] [Indexed: 01/12/2023] Open
Abstract
The lack of direct neurophysiological recordings from the thalamus and the cortex hampers our understanding of vegetative state/unresponsive wakefulness syndrome and minimally conscious state in humans. We obtained microelectrode recordings from the thalami and the homolateral parietal cortex of two vegetative state/unresponsive wakefulness syndrome and one minimally conscious state patients during surgery for implantation of electrodes in both thalami for chronic deep brain stimulation. We found that activity of the thalamo-cortical networks differed among the two conditions. There were half the number of active neurons in the thalami of patients in vegetative state/unresponsive wakefulness syndrome than in minimally conscious state. Coupling of thalamic neuron discharge with EEG phases also differed in the two conditions and thalamo-cortical cross-frequency coupling was limited to the minimally conscious state patient. When consciousness is physiologically or pharmacologically reversibly suspended there is a significant increase in bursting activity of the thalamic neurons. By contrast, in the thalami of our patients in both conditions fewer than 17% of the recorded neurons showed bursting activity. This indicates that these conditions differ from physiological suspension of consciousness and that increased thalamic inhibition is not prominent. Our findings, albeit obtained in a limited number of patients, unveil the neurophysiology of these conditions at single unit resolution and might be relevant for inspiring novel therapeutic options.
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Affiliation(s)
- Lorenzo Magrassi
- Neurochirurgia, Dipartimento di Scienze Clinico-Chirurgiche, Diagnostiche e Pediatriche, University of Pavia—Fondazione IRCCS Policlinico S. Matteo, Pavia, Italy
- Istituto di Genetica Molecolare IGM-CNR, Pavia, Italy
- * E-mail:
| | - Antonio G. Zippo
- Istituto di Bioimmagini e Fisiologia Molecolare, CNR, LITA Bldg, Segrate, Italy
| | - Alberto Azzalin
- Neurochirurgia, Dipartimento di Scienze Clinico-Chirurgiche, Diagnostiche e Pediatriche, University of Pavia—Fondazione IRCCS Policlinico S. Matteo, Pavia, Italy
- Istituto di Genetica Molecolare IGM-CNR, Pavia, Italy
| | - Stefano Bastianello
- State University of Pavia, Dept. of Brain and Behavioral Sciences, Neuroradiology Department—C. Mondino National Neurological Institute, Pavia, Italy
| | - Roberto Imberti
- Phase I Clinical Trial Unit and Experimental Therapy, Fondazione IRCCS Policlinico S. Matteo, Pavia, Italy
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Malekmohammadi M, Sparks H, AuYong N, Hudson A, Pouratian N. Propofol Anesthesia Precludes LFP-Based Functional Mapping of Pallidum during DBS Implantation. Stereotact Funct Neurosurg 2018; 96:249-258. [PMID: 30196280 DOI: 10.1159/000492231] [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] [Received: 03/22/2018] [Accepted: 07/18/2018] [Indexed: 12/22/2022]
Abstract
BACKGROUND/AIMS There are reports that microelectrode recording (MER) can be performed under certain anesthetized conditions for functional confirmation of the optimal deep brain stimulation (DBS) target. However, it is generally accepted that anesthesia affects MER. Due to a potential role of local field potentials (LFPs) in DBS functional mapping, we characterized the effect of propofol on globus pallidus interna (GPi) and externa (GPe) LFPs in Parkinson disease (PD) patients. METHODS We collected LFPs in 12 awake and anesthetized PD patients undergoing DBS implantation. Spectral power of β (13-35 Hz) and high-frequency oscillations (HFOs: 200-300 Hz) was compared across the pallidum. RESULTS Propofol suppressed GPi power by > 20 Hz while increasing power at lower frequencies. A similar power shift was observed in GPe; however, power in the high β range (20-35 Hz) increased with propofol. Before anesthesia both β and HFO activity were significantly greater at the GPi (χ2 = 20.63 and χ2 = 48.81, p < 0.0001). However, during anesthesia, we found no significant difference across the pallidum (χ2 = 0.47, p = 0.79, and χ2 = 4.11, p = 0.12). CONCLUSION GPi and GPe are distinguishable using LFP spectral profiles in the awake condition. Propofol obliterates this spectral differentiation. Therefore, LFP spectra cannot be relied upon in the propofol-anesthetized state for functional mapping during DBS implantation.
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Affiliation(s)
- Mahsa Malekmohammadi
- Department of Neurosurgery, University of California, Los Angeles, California, USA
| | - Hiro Sparks
- Department of Neurosurgery, University of California, Los Angeles, California, USA
| | - Nicholas AuYong
- Department of Neurosurgery, University of California, Los Angeles, California, USA
| | - Andrew Hudson
- Department of Anesthesiology, University of California, Los Angeles, California, USA
| | - Nader Pouratian
- Department of Neurosurgery, University of California, Los Angeles, California, USA.,Neuroscience Interdepartmental Program, University of California, Los Angeles, California, USA.,Brain Research Institute, University of California, Los Angeles, California, USA
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The Effects of Intraoperative Sedation on Surgical Outcomes of Deep Brain Stimulation Surgery. Can J Neurol Sci 2017; 45:168-175. [PMID: 29237514 DOI: 10.1017/cjn.2017.269] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Intraoperative sedation is often used to facilitate deep brain stimulation (DBS) surgery; however, these sedative agents also suppress microelectrode recordings (MER). To date, there have been no studies that have examined the effects of differing sedatives on surgical outcomes and the success of DBS surgery. METHODS We performed a retrospective study to evaluate the effect of differing sedative agents on postoperative surgical outcomes at 6 months in parkinsonian adult patients who underwent DBS surgery, from January 2004 through December 2014, at one academic center. Surgical outcomes of DBS were evaluated using a simplified Unified Parkinson Diseases Rating Score-III and levodopa dose equivalent reduction at baseline and 6 months postoperatively. RESULTS We analyzed data from 121 of 124 consecutive parkinsonian patients. Propofol, dexmedetomidine, remifentanil, and midazolam were used individually or in combination. All sedatives were routinely discontinued 20 to 30 minutes before MER, in accordance with our institutional protocol. We found no statistically significant association between the use of individual agent or combination of sedative agents and surgical outcomes at 6 months, the success of DBS, duration of MER, duration of stage 1 procedure, and perioperative complications. CONCLUSIONS Our study showed that the choice of sedative agent was not associated with poor surgical outcomes after DBS surgery using MER and macrostimulation techniques in parkinsonian patients.
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Lin SH, Lai HY, Lo YC, Chou C, Chou YT, Yang SH, Sun I, Chen BW, Wang CF, Liu GT, Jaw FS, Chen SY, Chen YY. Decreased Power but Preserved Bursting Features of Subthalamic Neuronal Signals in Advanced Parkinson's Patients under Controlled Desflurane Inhalation Anesthesia. Front Neurosci 2017; 11:701. [PMID: 29311782 PMCID: PMC5733027 DOI: 10.3389/fnins.2017.00701] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 11/28/2017] [Indexed: 11/13/2022] Open
Abstract
Deep brain stimulation (DBS) surgery of the subthalamic nucleus (STN) under general anesthesia (GA) had been used in Parkinson's disease (PD) patients who are unable tolerate awake surgery. The effect of anesthetics on intraoperative microelectrode recording (MER) remains unclear. Understanding the effect of anesthetics on MER is important in performing STN DBS surgery with general anesthesia. In this study, we retrospectively performed qualitive and quantitative analysis of STN MER in PD patients received STN DBS with controlled desflurane anesthesia or LA and compared their clinical outcome. From January 2005 to March 2006, 19 consecutive PD patients received bilateral STN DBS surgery in Hualien Tzu-Chi hospital under either desflurane GA (n = 10) or LA (n = 9). We used spike analysis (frequency and modified burst index [MBI]) and the Hilbert transform to obtain signal power measurements for background and spikes, and compared the characterizations of intraoperative microelectrode signals between the two groups. Additionally, STN firing pattern characteristics were determined using a combined approach based on the autocorrelogram and power spectral analysis, which was employed to investigate differences in the oscillatory activities between the groups. Clinical outcomes were assessed using the Unified Parkinson's Disease Rating Scale (UPDRS) before and after surgery. The results revealed burst firing was observed in both groups. The firing frequencies were greater in the LA group and MBI was comparable in both groups. Both the background and spikes were of significantly greater power in the LA group. The power spectra of the autocorrelograms were significantly higher in the GA group between 4 and 8 Hz. Clinical outcomes based on the UPDRS were comparable in both groups before and after DBS surgery. Under controlled light desflurane GA, burst features of the neuronal firing patterns are preserved in the STN, but power is reduced. Enhanced low-frequency (4–8 Hz) oscillations in the MERs for the GA group could be a characteristic signature of desflurane's effect on neurons in the STN.
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Affiliation(s)
- Sheng-Huang Lin
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan.,Department of Neurology, Tzu Chi General Hospital, Tzu Chi University, Hualien, Taiwan
| | - Hsin-Yi Lai
- Interdisciplinary Institute of Neuroscience and Technology, Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou, China
| | - Yu-Chun Lo
- The Ph.D. Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Chin Chou
- Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan
| | - Yi-Ting Chou
- Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan
| | - Shih-Hung Yang
- Department of Mechanical and Computer Aided Engineering, Feng Chia University, Taichung, Taiwan
| | - I Sun
- Department of Life Sciences, Institute of Genome Sciences, National Yang Ming University, Taipei, China
| | - Bo-Wei Chen
- Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan
| | - Ching-Fu Wang
- Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan
| | - Guan-Tze Liu
- Department of Medicine, National Yang Ming University, Taipei, Taiwan
| | - Fu-Shan Jaw
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | - Shin-Yuan Chen
- Department of Neurosurgery, Tzu Chi General Hospital, Tzu Chi University, Hualien, Taiwan
| | - You-Yin Chen
- The Ph.D. Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan.,Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan
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Tamir I, Marmor-Levin O, Eitan R, Bergman H, Israel Z. Posterolateral Trajectories Favor a Longer Motor Domain in Subthalamic Nucleus Deep Brain Stimulation for Parkinson Disease. World Neurosurg 2017; 106:450-461. [DOI: 10.1016/j.wneu.2017.06.178] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 06/26/2017] [Accepted: 06/29/2017] [Indexed: 01/08/2023]
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Effect of Dexmedetomidine and Propofol on Basal Ganglia Activity in Parkinson Disease: A Controlled Clinical Trial. Anesthesiology 2017; 126:1033-1042. [PMID: 28492384 DOI: 10.1097/aln.0000000000001620] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Deep brain stimulation electrodes can record oscillatory activity from deep brain structures, known as local field potentials. The authors' objective was to evaluate and quantify the effects of dexmedetomidine (0.2 μg·kg·h) on local field potentials in patients with Parkinson disease undergoing deep brain stimulation surgery compared with control recording (primary outcome), as well as the effect of propofol at different estimated peak effect site concentrations (0.5, 1.0, 1.5, 2.0, and 2.5 μg/ml) from control recording. METHODS A nonrandomized, nonblinded controlled clinical trial was carried out to assess the change in local field potentials activity over time in 10 patients with Parkinson disease who underwent deep brain stimulation placement surgery (18 subthalamic nuclei). The relationship was assessed between the activity in nuclei in the same patient at a given time and repeated measures from the same nucleus over time. RESULTS No significant difference was observed between the relative beta power of local field potentials in dexmedetomidine and control recordings (-7.7; 95% CI, -18.9 to 7.6). By contrast, there was a significant decline of 12.7% (95% CI, -21.3 to -4.7) in the relative beta power of the local field potentials for each increment in the estimated peak propofol concentrations at the effect site relative to the control recordings. CONCLUSIONS Dexmedetomidine (0.2 μg·kg·h) did not show effect on local field potentials compared with control recording. A significant deep brain activity decline from control recording was observed with incremental doses of propofol.
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25
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Sedation During Surgery for Movement Disorders and Perioperative Neurologic Complications: An Observational Study Comparing Local Anesthesia, Remifentanil, and Dexmedetomidine. World Neurosurg 2017; 101:114-121. [PMID: 28179174 DOI: 10.1016/j.wneu.2017.01.094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 01/25/2017] [Accepted: 01/25/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND The anesthetic management of patients requiring surgery for movement disorders needs to balance microrecording quality and patient cooperation with safety and comfort. Anesthetics can alter microrecording, although the effect on outcome is debatable. They also provide a rested and cooperative patient and minimize complications such as intracranial hemorrhage by providing better hemodynamic control. Most teams use local anesthesia with monitored anesthesia care or conscious sedation with propofol. Recently, dexmedetomidine has emerged as an alternative that, at low doses, does not affect microrecording, and that does not impair respiratory drive. METHODS In the past 15 years, we have used in our institution local anesthesia, remifentanil, or dexmedetomidine sedation. We compared functional outcome and rate of complications in a group of 145 patients with similar characteristics. RESULTS We found 5 (3.4%) intracranial hemorrhages. Two (1.4%) were symptomatic. The remifentanil group had the highest risk of having systolic blood pressure >160 mm Hg during surgery (odds ratio [OR], 2.8; 95% confidence interval [CI], 0.9-9.9), whereas the dexmedetomidine group had the lowest (OR, 0.7; 95% CI, 0.2-1.8), compared with the local anesthesia group. Surgical time was shortest with dexmedetomidine (mean, 283 minutes) and longest with local anesthesia only (mean, 328 minutes). Functional outcome (Unified Parkinson's Disease Rating Scale, Part III motor component scale) was similar among groups. The dexmedetomidine group had a statistically significant lower risk of perioperative neurologic events compared with the local anesthesia group (OR, 0.09; 95% CI, 0.002-0.68). CONCLUSIONS Sedation can be used safely without affecting outcome, and dexmedetomidine provides better hemodynamic management. Clinical significance remains unclear and larger studies need to be undertaken.
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Mathews L, Camalier CR, Kla KM, Mitchell MD, Konrad PE, Neimat JS, Smithson KG. The Effects of Dexmedetomidine on Microelectrode Recordings of the Subthalamic Nucleus during Deep Brain Stimulation Surgery: A Retrospective Analysis. Stereotact Funct Neurosurg 2017; 95:40-48. [PMID: 28132061 DOI: 10.1159/000453326] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 10/18/2016] [Indexed: 11/19/2022]
Abstract
BACKGROUND The placement of subthalamic nucleus (STN) deep brain stimulation (DBS) electrodes can be facilitated by intraoperative microelectrode recording (MER) of the STN. OBJECTIVES Optimal anesthetic management during surgery remains unclear because of a lack of quantitative data of the effect of anesthetics on MER. Therefore, we measured the effects of dexmedetomidine (DEX) on MER measures of the STN commonly taken intraoperatively. METHODS MER from 45 patients was retrospectively compared between patients treated with remifentanil (REMI) alone or both REMI and DEX, which are the 2 main standards of care at our center. The measures examined were population activity, such as root mean square, STN length, and number of passes yielding STN, and the single-neuron measures of firing rate and variability. RESULTS The addition of DEX does not affect population measures (number of passes: DEX+REMI, n = 68, REMI only, n = 154), or neuronal firing rates (number of neurons: DEX+REMI, n = 64, REMI only, n = 72), but firing rate variability was reduced. CONCLUSIONS In this cohort, population-based measures routinely used for electrode placement in the STN were unaffected by DEX when added to REMI. Neuronal firing rates were also unaffected, but their variability was reduced, even beyond 20 min after cessation.
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Affiliation(s)
- Letha Mathews
- Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN, USA
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Bosch L, Fernández-Candil J, León A, Gambús PL. Influence of general anaesthesia on the brainstem. ACTA ACUST UNITED AC 2016; 64:157-167. [PMID: 27887735 DOI: 10.1016/j.redar.2016.09.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 09/15/2016] [Accepted: 09/15/2016] [Indexed: 11/17/2022]
Abstract
The exact role of the brainstem in the control of body functions is not yet well known and the same applies to the influence of general anaesthesia on brainstem functions. Nevertheless in all general anaesthesia the anaesthesiologist should be aware of the interaction of anaesthetic drugs and brainstem function in relation to whole body homeostasis. As a result of this interaction there will be changes in consciousness, protective reflexes, breathing pattern, heart rate, temperature or arterial blood pressure to name a few. Brainstem function can be explored using three different approaches: clinically, analyzing changes in brain electric activity or using neuroimaging techniques. With the aim of providing the clinician anaesthesiologist with a global view of the interaction between the anaesthetic state and homeostatic changes related to brainstem function, the present review article addresses the influence of anaesthetic drug effects on brainstem function through clinical exploration of cranial nerves and reflexes, analysis of electric signals such as electroencephalographic changes and what it is known about brainstem through the use of imaging techniques, more specifically functional magnetic resonance imaging.
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Affiliation(s)
- L Bosch
- Servicio de Anestesiología y Reanimación, Parc de Salut Mar (PSM), Barcelona, España.
| | - J Fernández-Candil
- Servicio de Anestesiología y Reanimación, Parc de Salut Mar (PSM), Barcelona, España
| | - A León
- Servicio de Neurología, Sección de Neurofisiología Clínica; Parc de Salut Mar (PSM), Barcelona, España
| | - P L Gambús
- Servicio de Anestesiología y Reanimación; Hospital CLINIC de Barcelona, Barcelona, España
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Maiti TK, Konar S, Bir S, Kalakoti P, Nanda A. Intra-operative micro-electrode recording in functional neurosurgery: Past, present, future. J Clin Neurosci 2016; 32:166-72. [PMID: 27396672 DOI: 10.1016/j.jocn.2016.03.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 03/24/2016] [Accepted: 03/28/2016] [Indexed: 11/25/2022]
Abstract
The field of functional neurosurgery has experienced a rise, fall and lastly a renaissance over the past 75years. Micro-electrode recording (MER) played a key role during this eventful journey. However, as the intra-operative MRI continues to evolve, a pertinent question about the utility of MER has been raised in recent years. In this article, we critically review these current controversies. The English literature is reviewed and the complex technique of MER is discussed in a simplified manner. The improvement of neuroimaging and its application in functional neurosurgery, especially in deep brain stimulation, is discussed. Finally, the current controversies and technical advances which can direct the future are reviewed. The results of existing meta-analyses addressing the controversies are summarized. Wide variations of pre-operative and intra-operative targeting methods have been described in the literature. Though functional neurosurgery is generally safe, complications do occur and multiple passes during MER can certainly add to the risk of inadvertent hemorrhage and infection. Additionally, the recent introduction of newer MRI modalities has ensured better delineation of the target. However, MER is still useful to address brain shift, for mapping of newer targets, for ablative surgeries and in centers without an intra-operative imaging facility. In the current scenario, it is nearly impossible to conduct a prospective study to decide the utility of MER. The importance of MER may further diminish in the future as a routine procedure, but its role as a gold standard procedure may still persist.
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Affiliation(s)
- Tanmoy K Maiti
- Department of Neurosurgery, LSU Health-Shreveport, 1501 Kings Highway, Shreveport, LA 71130-3932, USA
| | - Subhas Konar
- Department of Neurosurgery, LSU Health-Shreveport, 1501 Kings Highway, Shreveport, LA 71130-3932, USA
| | - Shyamal Bir
- Department of Neurosurgery, LSU Health-Shreveport, 1501 Kings Highway, Shreveport, LA 71130-3932, USA
| | - Piyush Kalakoti
- Department of Neurosurgery, LSU Health-Shreveport, 1501 Kings Highway, Shreveport, LA 71130-3932, USA
| | - Anil Nanda
- Department of Neurosurgery, LSU Health-Shreveport, 1501 Kings Highway, Shreveport, LA 71130-3932, USA.
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Sedation with α2 Agonist Dexmedetomidine During Unilateral Subthalamic Nucleus Deep Brain Stimulation: A Preliminary Report. World Neurosurg 2016; 89:320-8. [DOI: 10.1016/j.wneu.2016.01.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 01/07/2016] [Accepted: 01/08/2016] [Indexed: 11/23/2022]
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31
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Kwon WK, Kim JH, Lee JH, Lim BG, Lee IO, Koh SB, Kwon TH. Microelectrode recording (MER) findings during sleep–awake anesthesia using dexmedetomidine in deep brain stimulation surgery for Parkinson’s disease. Clin Neurol Neurosurg 2016; 143:27-33. [DOI: 10.1016/j.clineuro.2016.02.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 02/04/2016] [Accepted: 02/05/2016] [Indexed: 11/27/2022]
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