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Neurophysiology monitoring

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https://www.readbyqxmd.com/read/28719456/warning-criteria-for-intraoperative-neurophysiologic-monitoring
#1
Quanmeng Liu, Qinzhou Wang, Hongen Liu, William K K Wu, Matthew T V Chan
PURPOSE OF REVIEW: Intraoperative changes in somatosensory (SEP) and motor evoked potentials (MEPs) may indicate potential injury to the spinal cord and will require timely intervention to prevent permanent damage. This review focuses on the validity of currently recommended warning criteria for intraoperative evoked potential monitoring. RECENT FINDINGS: Current guideline recommends a decrease in SEP amplitude by 50% and MEP amplitude by 50-100% as warning signals for injury to the ascending sensory and descending motor pathway, respectively...
July 15, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28713053/perils-of-intraoperative-neurophysiologic-monitoring-analysis-of-false-negative-results-in-spine-surgeries
#2
Arvydas Tamkus, Kent S Rice, Michael McCaffrey
BACKGROUND CONTEXT: Although some authors published case reports describing false negatives in intraoperative neurophysiologic monitoring (IONM), systematic review of causes of false negative IONM results is lacking. PURPOSE: The objective was to analyze false negative IONM findings in spine surgery. STUDY DESIGN: Retrospective cohort analysis PATIENT SAMPLE: A cohort of 109 patients with new postoperative neurological deficits was analyzed for possible false negative IONM reporting...
July 13, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28701934/neuronal-intra-individual-variability-masks-response-selection-differences-between-adhd-subtypes-a-need-to-change-perspectives
#3
Annet Bluschke, Witold X Chmielewski, Moritz Mückschel, Veit Roessner, Christian Beste
Due to the high intra-individual variability in attention deficit/hyperactivity disorder (ADHD), there may be considerable bias in knowledge about altered neurophysiological processes underlying executive dysfunctions in patients with different ADHD subtypes. When aiming to establish dimensional cognitive-neurophysiological constructs representing symptoms of ADHD as suggested by the initiative for Research Domain Criteria, it is crucial to consider such processes independent of variability. We examined patients with the predominantly inattentive subtype (attention deficit disorder, ADD) and the combined subtype of ADHD (ADHD-C) in a flanker task measuring conflict control...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28700611/in-vivo-calcium-imaging-from-dentate-granule-cells-with-wide-field-fluorescence-microscopy
#4
Yuichiro Hayashi, Satoshi Yawata, Kazuo Funabiki, Takatoshi Hikida
A combination of genetically-encoded calcium indicators and micro-optics has enabled monitoring of large-scale dynamics of neuronal activity from behaving animals. In these studies, wide-field microscopy is often used to visualize neural activity. However, this method lacks optical sectioning capability, and therefore its axial resolution is generally poor. At present, it is unclear whether wide-field microscopy can visualize activity of densely packed small neurons at cellular resolution. To examine the applicability of wide-field microscopy for small-sized neurons, we recorded calcium activity of dentate granule cells having a small soma diameter of approximately 10 micrometers...
2017: PloS One
https://www.readbyqxmd.com/read/28689398/an-electrode-configuration-for-recording-muscle-motor-evoked-potentials-in-the-upper-extremities-during-intraoperative-neurophysiological-monitoring
#5
Young-Doo Choi, Seung-Hyun Jin, Chi-Heon Kim, Gil Ho Kwak, Bo Eun Kim, Chun Kee Chung
OBJECTIVE: The main aim of the present study is to examine the electrode configurations used to record the muscle motor evoked potential (mMEP) in the upper extremities during surgery with the goal of producing a high and stable mMEP signal, in particular among the abductor pollicis brevis (APB), abductor digiti minimi (ADM), and across the APB-ADM muscles, which have been widely used for the mMEP in the upper extremities. METHODS: Thirty right-handed patients were recruited in this prospective study...
July 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28676974/long-term-evaluation-of-intraoperative-neurophysiological-monitoring-assisted-tethered-cord-surgery
#6
S E Dulfer, G Drost, F Lange, H L Journee, F H Wapstra, E W Hoving
PURPOSE: Patients with tethered spinal cord have been investigated for short-term effects after tethered spinal cord surgery in the past. However, little is known about the long-term effects in this patient group. In this retrospective, longitudinal, observational study, a patient sample of a previous report of 65 patients was reassessed to observe the long-term effects of intraoperative neurophysiological monitoring-assisted tethered cord surgery. METHODS: With the use of patient charts and a survey, patients were scored on four domains: (1) neurological deficits, (2) urological deficits, (3) pain symptoms, and (4) orthopedic deficits...
July 4, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28669422/slower-resting-alpha-frequency-is-associated-with-superior-localisation-of-moving-targets
#7
Christina J Howard, Craig P A Arnold, Matthew K Belmonte
We examined the neurophysiological underpinnings of individual differences in the ability to maintain up-to-date representations of the positions of moving objects. In two experiments similar to the multiple object tracking (MOT) task, we asked observers to monitor continuously one or several targets as they moved unpredictably for a semi-random period. After all objects disappeared, observers were immediately prompted to report the perceived final position of one queried target. Precision of these position reports declined with attentional load, and reports tended to best resemble positions occupied by the queried target between 0 and 30ms in the past...
June 29, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28664035/neurophysiological-mechanisms-of-circadian-cognitive-control-in-rls-patients-an-eeg-source-localization-study
#8
Rui Zhang, Moritz D Brandt, Wiebke Schrempf, Christian Beste, Ann-Kathrin Stock
The circadian variation of sensory and motor symptoms with increasing severity in the evening and at night is a key diagnostic feature/symptom of the restless legs syndrome (RLS). Even though many neurological diseases have shown a strong nexus between motor and cognitive symptoms, it has remained unclear whether cognitive performance of RLS patients declines in the evening and which neurophysiological mechanisms are affected by the circadian variation. In the current study, we examined daytime effects (morning vs...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28660303/the-role-of-eeg-recordings-in-children-undergoing-cardiac-surgery-for-congenital-heart-disease
#9
Sascha Meyer, Martin Poryo, Mohammed Shatat, Ludwig Gortner, Hashim Abdul-Khaliq
BACKGROUND: Neurological dysfunction may occur after corrective cardiac surgery using cardio-pulmonary bypass (CPB) with or without circulatory arrest. Different neurophysiological monitoring systems have been employed to detect neurological complications and possible brain injury in infants and children during and after cardiac surgery. The value of Elecetroencephalogram (EEG) in infants and children at risk for neurological sequelae has not been systematically studied. METHODS: Sequential performance of two EEGs before and after cardiac surgery at a tertiary University Hospital to screen for possible brain injury after cardiac surgery in neonates and children undergoing CPB surgery...
June 28, 2017: Wiener Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28660107/optimal-timing-of-surgery-for-intramedullary-cavernous-hemangioma-of-the-spinal-cord-in-relation-to-preoperative-motor-paresis-disease-duration-and-tumor-volume-and-location
#10
Shiro Imagama, Zenya Ito, Kei Ando, Kazuyoshi Kobayashi, Tetsuro Hida, Kenyu Ito, Mikito Tsushima, Yoshimoto Ishikawa, Akiyuki Matsumoto, Masayoshi Morozumi, Satoshi Tanaka, Masaaki Machino, Kyotaro Ota, Hiroaki Nakashima, Norimitsu Wakao, Yoshihito Sakai, Yukihiro Matsuyama, Naoki Ishiguro
STUDY DESIGN: Prospective study. OBJECTIVE: Investigate factors associated with preoperative motor paresis, recovery, ambulatory status, and intraoperative neurophysiological monitoring (IONM) among patients with no preoperative paresis (N group), complete preoperative motor recovery (CR group), and no complete recovery (NCR group) in patients with intramedullary spinal cavernous hemangioma to determine the optimal timing of surgery. METHODS: The study evaluated 41 surgical cases in our institute...
May 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28650882/diagnostic-utility-of-intraoperative-neurophysiological-monitoring-for-intramedullary-spinal-cord-tumors-systematic-review-and-meta-analysis
#11
Tej D Azad, Arjun V Pendharkar, Viet Nguyen, James Pan, Ian D Connolly, Anand Veeravagu, Rita Popat, John K Ratliff, Gerald A Grant
STUDY DESIGN: Systematic review and meta-analysis. OBJECTIVE: The aim of this study was to systematically evaluate the diagnostic utility of intraoperative neurophysiological monitoring (IONM) for detecting postoperative injury in resection of intramedullary spinal cord tumors (IMSCT). SUMMARY OF BACKGROUND DATA: Surgical management of IMSCT can involve key neurological and vascular structures. IONM aims to assess the functional integrity of susceptible elements in real time...
June 23, 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28650602/intraoperative-neurophysiological-monitoring-to-protect-the-facial-nerve-during-microsurgery-for-large-vestibular-schwannomas
#12
(no author information available yet)
OBJECTIVE: Microsurgery is the preferred treatment for large vestibular schwannomas (VSs). However, anatomical and functional preservation of the facial nerve (FN) remains a challenge during this surgery. The aim of this study was to determine whether it is beneficial to the preservation rates of the FN during microsurgical treatment of large VSs using intraoperative neurophysiological monitoring (IONM). METHODS: We retrospectively reviewed 53 patients with large VSs that underwent microsurgical resection via the retrosigmoid approach in our department during April 2009 to March 2016...
May 26, 2017: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28641848/the-use-of-embolic-protection-devices-is-associated-with-a-lower-stroke-and-death-rate-after-carotid-stenting
#13
Christoph Knappich, Andreas Kuehnl, Pavlos Tsantilas, Sofie Schmid, Thorben Breitkreuz, Michael Kallmayer, Alexander Zimmermann, Hans-Henning Eckstein
OBJECTIVES: The aim of this study was to analyze the association between intraprocedural and periprocedural variables and in-hospital stroke or death rate after carotid artery stenting. BACKGROUND: In Germany, all open surgical and endovascular procedures on the extracranial carotid artery must be documented in a statutory nationwide quality assurance database. METHODS: A total of 13,086 carotid artery stenting procedures for asymptomatic (63...
June 26, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28641453/accuracy-of-limited-montage-electroencephalography-in-monitoring-postanoxic-comatose-patients
#14
Sandipan Pati, Lauren McClain, Lidia Moura, Yuan Fan, M Brandon Westover
BACKGROUND: Continuous EEG (cEEG) monitoring may help to identify the small percentage of adults with hypoxic-ischemic encephalopathy (HIE) who will regain consciousness if allowed sufficient time. However, the limited yield in this population has led some to question the cost-effectiveness cEEG monitoring in this population. We hypothesized that limited-montage cEEG could provide essentially the same neurophysiologic information at lower cost. In this proof of concept study, we aim to demonstrate the potentials of limited channel EEG in prognostication in postanoxic patients...
June 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28621503/ph-responsive-fluorescence-enhancement-in-graphene-oxide-naphthalimide-nanoconjugates-a-fluorescence-turn-on-sensor-for-acetylcholine
#15
Sreejith Mangalath, Silja Abraham, Joshy Joseph
A pH sensitive, fluorescence 'turn on' sensor based on a graphene oxide-naphthalimide nanoconjugate (GO-NI) for the detection of acetylcholine (ACh) by monitoring the enzymatic activity of acetylcholinesterase (AChE) in aqueous solution is reported. These nanoconjugates were synthesized by covalently anchoring picolyl substituted naphthalimide derivatives on GO/rGO surface via EDC-NHS coupling strategy and the morphological and photophysical properties were studied in detail. Synergistic effects of - interactions between GO and naphthalimide chromophore, and efficient photoinduced electron and energy transfer processes are responsible for the strong quenching of fluorescence of these nanoconjugates, which gets perturbed at acidic pH conditions leading to significant enhancement of fluorescence emission...
June 16, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28620788/comparison-of-intraoperative-neurophysiologic-monitoring-outcomes-between-cervical-and-thoracic-spine-surgery
#16
Shujie Wang, Yuan Tian, Xiangquan Lin, Zhifu Ren, Yu Zhao, Jiliang Zhai, Xiaojuan Zhang, Yanwei Zhao, Yingyue Dong, Congran Zhao, Ye Tian
PURPOSE: The objective is to compare the intraoperative monitoring (IOM) outcomes between degenerative cervical and thoracic spine decompression surgery. METHOD: A total of 97 patients with cervical compression myelopathy (CCM) and 75 patients with thoracic compression myelopathy (TCM) were prospectively collected between December 2012 and June 2015 in our spine center. Somatosensory-evoked potentials (SSEP) and motor-evoked potentials (MEP) were used for IOM. The postoperative neurologic status of each patient was assessed immediately after surgery...
June 15, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28599909/anterior-transthoracic-surgery-with-motor-evoked-potential-monitoring-for-high-risk-thoracic-disc-herniations-technique-and-results
#17
Erwin Cornips, Jeroen Habets, Vivianne van Kranen-Mastenbroek, Herman Bos, Paul Bergs, Alida Postma
OBJECTIVE: We present our experience with anterior transthoracic surgery for high-risk thoracic disc herniations (TDHs) using motor evoked potential monitoring (MEPm). METHODS: We estimated surgical risk based on clinical and radiological characteristics, including antero-posterior (AP) spinal canal occupation (SCO), AP spinal cord compression (SCC), residual AP spinal cord diameter (RSCD), and intramedullary signal changes (ISC). We analyzed Anand, ASIA, and Nurick scores, anesthesiological, neurophysiological, and surgical reports...
June 6, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28586707/consensus-based-guidelines-for-video-eeg-monitoring-in-the-pre-surgical-evaluation-of-children-with-epilepsy-in-the-uk
#18
Ronit M Pressler, Stefano Seri, Nick Kane, Tim Martland, Sushma Goyal, Anand Iyer, Elliott Warren, Lesley Notghi, Peter Bill, Rachel Thornton, Richard Appleton, Sarah Doyle, Sarah Rushton, Alan Worley, Stewart G Boyd
PURPOSE: Paediatric Epilepsy surgery in the UK has recently been centralised in order to improve expertise and quality of service available to children. Video EEG monitoring or telemetry is a highly specialised and a crucial component of the pre-surgical evaluation. Although many Epilepsy Monitoring Units work to certain standards, there is no national or international guideline for paediatric video telemetry. METHODS: Due to lack of evidence we used a modified Delphi process utilizing the clinical and academic expertise of the clinical neurophysiology sub-specialty group of Children's Epilepsy Surgical Service (CESS) centres in England and Wales...
May 12, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28571911/a-spotlight-on-intraoperative-neurophysiological-monitoring-of-the-lower-brainstem
#19
EDITORIAL
Francesco Sala
No abstract text is available yet for this article.
July 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28558955/seizures-in-preterm-neonates-a-multicenter-observational-cohort-study
#20
Hannah C Glass, Renée A Shellhaas, Tammy N Tsuchida, Taeun Chang, Courtney J Wusthoff, Catherine J Chu, M Roberta Cilio, Sonia L Bonifacio, Shavonne L Massey, Nicholas S Abend, Janet S Soul
BACKGROUND: The purpose of this study was to characterize seizures among preterm neonates enrolled in the Neonatal Seizure Registry, a prospective cohort of consecutive neonates with seizures at seven pediatric centers that follow the American Clinical Neurophysiology Society's neonatal electroencephalography monitoring guideline. STUDY DESIGN: Of 611 enrolled neonates with seizures, 92 (15%) were born preterm. Seizure characteristics were evaluated by gestational age at birth for extremely preterm (<28 weeks, N = 18), very preterm (28 to <32 weeks, N = 18), and moderate to late preterm (32 to <37 weeks, N = 56) and compared with term neonates...
July 2017: Pediatric Neurology
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