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Evoked potential and anesthesia

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https://www.readbyqxmd.com/read/29796432/electrophysiologic-evaluation-of-the-visual-pathway-at-different-depths-of-sevoflurane-anesthesia-in-diabetic-rats
#1
Daniela Adriana Iliescu, Alexandra Ciubotaru, Mihai Aurelian Ghiţă, Adrian Marius Păun, Tudor Ion, Leon Zăgrean
Our study investigated the changes produced by diabetes on the visual pathway in a Wistar rat model. The impact of diabetes at 10 weeks after intraperitoneal streptozotocin (STZ) injection was evaluated through electrophysiological methods like visual evoked potentials (VEP) and electroretinogram (ERG). VEP and ERG were recorded simultaneously under different sevoflurane anesthetic depths. In all tested concentrations, sevoflurane affected the amplitude and latency of VEP and ERG component elements. With increasing anesthetic depths, sevoflurane increased the latencies of VEP N1, P1 and N2 peaks and ERG a- and b- waves in both control and diabetic animals...
January 2018: Romanian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29787414/perioperative-peripheral-nerve-injury-after-general-anesthesia-a-qualitative-systematic-review
#2
Jason Chui, John M Murkin, Karen L Posner, Karen B Domino
Perioperative peripheral nerve injury (PNI) is a well-recognized complication of general anesthesia that continues to result in patient disability and malpractice claims. However, the multifactorial etiology of PNI is often not appreciated in malpractice claims given that most PNI is alleged to be due to errors in patient positioning. New advances in monitoring may aid anesthesiologists in the early detection of PNI. This article reviews recent studies of perioperative PNI after general anesthesia and discusses the epidemiology and potential mechanisms of injury and preventive measures...
May 21, 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29784077/effects-of-ketamine-compared-with-urethane-anesthesia-on-vestibular-sensory-evoked-potentials-and-systemic-physiology-in-mice
#3
Choongheon Lee, Timothy A Jones
The injectable anesthetic mixture ketamine-xylazine is commonly used for electrophysiologic experiments in laboratory animals, especially rodents. General anesthesia can induce significant changes in systemic physiology, including those that compromise neural function, thus introducing research confounds. The extent of such concerns varies by agent. Here in mice, we compared the effects of ketamine-xylazine and urethane-xylazine anesthesia on systemic physiologic parameters and the vestibular sensory evoked potential (VsEP), a tool used commonly to assess peripheral vestibular function...
May 1, 2018: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/29771608/paced-breathing-and-phrenic-nerve-responses-evoked-by-epidural-stimulation-following-complete-high-cervical-spinal-cord-injury-in-rats
#4
Tatiana Bezdudnaya, Michael A Lane, Vitaliy Marchenko
Spinal cord injury (SCI) at the level of cervical segments often results in life-threatening respiratory complications and requires long-term mechanical ventilator assistance. Thus, restoring diaphragm activity and regaining voluntary control of breathing are the primary clinical goals for patients with respiratory dysfunction following cervical SCI. Epidural stimulation (EDS) is a promising strategy that has been explored extensively for non-respiratory functions, and to a limited extent within the respiratory system...
May 17, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29749573/tone-evoked-acoustic-change-complex-acc-recorded-in-a-sedated-animal-model
#5
Alessandro Presacco, John C Middlebrooks
The acoustic change complex (ACC) is a scalp-recorded cortical evoked potential complex generated in response to changes (e.g., frequency, amplitude) in an auditory stimulus. The ACC has been well studied in humans, but to our knowledge, no animal model has been evaluated. In particular, it was not known whether the ACC could be recorded under the conditions of sedation that likely would be necessary for recordings from animals. For that reason, we tested the feasibility of recording ACC from sedated cats in response to changes of frequency and amplitude of pure-tone stimuli...
May 10, 2018: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/29742889/intraoperative-neurophysiological-monitoring-a-review-of-techniques-used-for-brain-tumor-surgery-in-children
#6
REVIEW
Keewon Kim, Charles Cho, Moon-Suk Bang, Hyung-Ik Shin, Ji-Hoon Phi, Seung-Ki Kim
Intraoperative monitoring (IOM) utilizes electrophysiological techniques as a surrogate test and evaluation of nervous function while a patient is under general anesthesia. They are increasingly used for procedures, both surgical and endovascular, to avoid injury during an operation, examine neurological tissue to guide the surgery, or to test electrophysiological function to allow for more complete resection or corrections. The application of IOM during pediatric brain tumor resections encompasses a unique set of technical issues...
May 2018: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/29727475/subthalamic-nucleus-deep-brain-stimulation-evokes-resonant-neural-activity
#7
Nicholas C Sinclair, Hugh J McDermott, Kristian J Bulluss, James B Fallon, Thushara Perera, San San Xu, Peter Brown, Wesley Thevathasan
Deep brain stimulation (DBS) is a rapidly expanding treatment for neurological and psychiatric conditions; however, a target-specific biomarker is required to optimize therapy. Here, we show that DBS evokes a large-amplitude resonant neural response focally in the subthalamic nucleus. This response is greatest in the dorsal region (the clinically optimal stimulation target for Parkinson disease), coincides with improved clinical performance, is chronically recordable, and is present under general anesthesia...
May 4, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29704223/low-thoracic-erector-spinae-plane-block-for-perioperative-analgesia-in-lumbosacral-spine-surgery-a-case-series
#8
Josh P Melvin, Rudolph J Schrot, George M Chu, Ki Jinn Chin
PURPOSE: Severe postoperative pain following spine surgery is a significant cause of morbidity, extended length of facility stay, and marked opioid usage. The erector spinae plane (ESP) block anesthetizes the dorsal rami of spinal nerves that innervate the paraspinal muscles and bony vertebra. We describe the use of low thoracic ESP blocks as part of multimodal analgesia in lumbosacral spine surgery. CLINICAL FEATURES: We performed bilateral ESP blocks at the T10 or T12 level in six cases of lumbosacral spine surgery: three lumbar decompressions, two sacral laminoplasties, and one coccygectomy...
April 27, 2018: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29695313/effects-of-ketamine-compared-with-urethane-anesthesia-on-vestibular-sensory-evoked-potentials-and-systemic-physiology-in-mice
#9
Choongheon Lee, Timothy A Jones
The injectable anesthetic mixture ketamine-xylazine is commonly used for electrophysiologic experiments in laboratory animals, especially rodents. General anesthesia can induce significant changes in systemic physiology, including those that compromise neural function, thus introducing research confounds. The extent of such concerns varies by agent. Here in mice, we compared the effects of ketamine-xylazine and urethane-xylazine anesthesia on systemic physiologic parameters and the vestibular sensory evoked potential (VsEP), a tool used commonly to assess peripheral vestibular function...
April 25, 2018: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/29694662/technique-of-localizing-the-central-sulcus-under-awaking-anesthesia-for-treatmeat-of-gliomas-in-or-near-motor-areas
#10
Wan Yi, Shujun Xu, Xingang Li, Xiangyu Ma
AIM: This study aimed to study the protective effect of intraoperative awakening and central sulcus location on motor function for patients with gliomas located in motor areas. METHODS: A total of 68 patients with gliomas in motor areas were intubated with a laryngeal mask and rapidly underwent craniotomy without scalp clips and awakening, followed by localization of the central sulcus by somatosensory evoked potential. To protect brain function, we resected the greatest degree of tumor as possible and then finished the close-skull under an awakened state or general anesthesia...
April 6, 2018: Turkish Neurosurgery
https://www.readbyqxmd.com/read/29643629/intraoperative-neurophysiological-monitoring-team-s-communiqu%C3%A3-with-anesthesia-professionals
#11
Anurag Tewari, Lisa Francis, Ravi N Samy, Dean C Kurth, Joshua Castle, Tiffany Frye, Mohamed Mahmoud
Background and Aims: Intraoperative neurophysiological monitoring (IONM) is the standard of care during many spinal, vascular, and intracranial surgeries. High-quality perioperative care requires the communication and cooperation of several multidisciplinary teams. One of these multidisciplinary services is intraoperative neuromonitoring (IONM), while other teams represent anesthesia and surgery. Few studies have investigated the IONM team's objective communication with anesthesia providers...
January 2018: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/29623523/visual-evoked-potentials-can-be-reliably-recorded-using-noninvasive-epidermal-electrodes-in-the-anesthetized-rat
#12
Roberto Santangelo, Valerio Castoldi, Raffaele D'Isa, Silvia Marenna, Su-Chun Huang, Marco Cursi, Giancarlo Comi, Letizia Leocani
PURPOSE: Visual evoked potentials (VEPs) are a powerful tool to evaluate nervous conduction along the visual pathways, both in humans and in animal models. Traditionally, epidural screw electrodes are used to record VEPs in preclinical research. Here we tested the feasibility in the preclinical setting of the same noninvasive technique used for clinical VEP acquisition, by using epidermal cup electrodes with no surgical procedures. METHODS: Monocular flash VEPs were recorded bilaterally under sevoflurane anesthesia once a week for 6 weeks in 14 dark Agouti rats, 7 with implanted epidural screws and 7 with epidermal 6 mm Ø Ag/AgCl cups...
April 5, 2018: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/29568123/non-instrumental-clinical-monitoring-does-not-guarantee-an-adequate-course-of-general-anesthesia-a-prospective-clinical-study
#13
Katarzyna Szostakiewicz, Zbigniew Rybicki, Dariusz Tomaszewski
BACKGROUND: Clinical monitoring is the most common method of adjusting the appropriate level of general anesthesia. However, episodes of intraoperative awareness (AWR) are still reported, suggesting that clinical observations may not be sufficient in some cases. The objective of this study was to compare the efficacy of clinical and instrumental neuromonitoring with auditory evoked potentials (AEP) in an intraoperative analysis of the proper level of general anesthesia. METHODS: Patients scheduled for elective surgery were randomly divided into two groups...
March 21, 2018: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/29543212/-effectiveness-of-intraoperative-monitoring-of-motor-evoked-potentials-for-predicting-changes-in-the-neurological-status-of-patients-with-cervical-spinal-cord-tumors-in-the-early-postoperative-period
#14
V S Klimov, V V Kel'makov, N V Chishchina, A V Evsyukov
AIM: The study aim was to evaluate the effectiveness of intraoperative monitoring of motor evoked potentials (MEPs) for predicting changes in the neurological status of patients with cervical spinal cord tumors in the early postoperative period. MATERIAL AND METHODS: The study included 74 patients with intradural cervical spinal cord tumors who were operated on using motor evoked potential monitoring in the period from 2013 to 2016. There were 29 (39%) males and 46 (61%) females...
2018: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/29520220/astrocyte-hypertrophy-and-microglia-activation-in-the-rat-auditory-midbrain-is-induced-by-electrical-intracochlear-stimulation
#15
Nicole Rosskothen-Kuhl, Heika Hildebrandt, Ralf Birkenhäger, Robert-Benjamin Illing
Neuron-glia interactions contribute to tissue homeostasis and functional plasticity in the mammalian brain, but it remains unclear how this is achieved. The potential of central auditory brain tissue for stimulation-dependent cellular remodeling was studied in hearing-experienced and neonatally deafened rats. At adulthood, both groups received an intracochlear electrode into the left cochlea and were continuously stimulated for 1 or 7 days after waking up from anesthesia. Normal hearing and deafness were assessed by auditory brainstem responses (ABRs)...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29492126/pure-tethered-cervical-cord-and-review-of-literature
#16
Vinod Kumar Tewari, Rituj Somvanshi, Ravindra Bihari Trivedi, Mazhar Hussain, H K Das Gupta, R S Dubey
Tethering of the spinal cord in the lumbosacral region with myelomeningocele is a well-known phenomenon. Only sporadic cases of tethering along the rest of the neuraxis, including the hindbrain, cervical, and thoracic spinal cord have been documented, always along with some associated congenital malformations (hydrocephalus, Chiari malformation, myelomeningocele, meningocele, hamartomatous stalk, spina bifida occulta, intramedullary lipoma, intradural fibrous adhesions, the fusion of the sixth and seventh cervical vertebrae, split cord malformation, or low-lying cord)...
January 2018: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29421324/effects-of-propofol-anesthesia-on-the-processing-of-noxious-stimuli-in-the-spinal-cord-and-the-brain
#17
Gregor Lichtner, Ryszard Auksztulewicz, Evgeniya Kirilina, Helena Velten, Dionysios Mavrodis, Michael Scheel, Felix Blankenburg, Falk von Dincklage
Drug-induced unconsciousness is an essential component of general anesthesia, commonly attributed to attenuation of higher-order processing of external stimuli and a resulting loss of information integration capabilities of the brain. In this study, we investigated how the hypnotic drug propofol at doses comparable to those in clinical practice influences the processing of somatosensory stimuli in the spinal cord and in primary and higher-order cortices. Using nociceptive reflexes, somatosensory evoked potentials and functional magnet resonance imaging (fMRI), we found that propofol abolishes the processing of innocuous and moderate noxious stimuli at low to medium concentration levels, but that intense noxious stimuli evoked spinal and cerebral responses even during deep propofol anesthesia that caused profound electroencephalogram (EEG) burst suppression...
May 15, 2018: NeuroImage
https://www.readbyqxmd.com/read/29300715/intraoperative-somatosensory-evoked-potential-monitoring-decreases-eeg-burst-suppression-ratio-during-deep-general-anesthesia-erratum
#18
(no author information available yet)
No abstract text is available yet for this article.
January 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29285072/changes-in-transcranial-electrical-motor-evoked-potentials-during-the-early-and-reversible-stage-of-permanent-spinal-cord-ischemia-predict-spinal-cord-injury-in-a-rabbit-animal-model
#19
Mingguang Wang, Fanguo Meng, Qimin Song, Jian Zhang, Chao Dai, Qingyan Zhao
The present study examined changes in the transcranial electrical motor-evoked potentials (TceMEP) waveform to predict neurological deficits and histopathological changes during the early and reversible stage of different levels of permanent spinal cord ischemic injury in a rabbit animal model. A total of 24 New Zealand rabbits were randomly divided into four groups of 6 rabbits each. Group 1 underwent a ligation of the lumbar artery at three levels (L1-L3), group 2 underwent a ligation of the lumbar artery at four levels (L1-L4) and group 3 underwent a ligation of the lumbar artery at five levels (L1-L5)...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29258928/predictive-value-of-intraoperative-facial-motor-evoked-potentials-in-vestibular-schwannoma-surgery-under-2-anesthesia-protocols
#20
Miao Ling, Xiaorong Tao, Siyuan Ma, Xiaocui Yang, Li Liu, Xing Fan, Guijun Jia, Hui Qiao
OBJECTIVE: We sought to validate the feasibility of facial motor evoked potential (FMEP) in facial nerve (FN) monitoring during vestibular schwannoma (VS) surgery under 2 anesthesia protocols and to examine its value for postoperative prognosis. METHODS: This prospective study included 106 patients with VS who underwent microsurgical excision between May 2014 and November 2016 at the Beijing Tiantan Hospital, Capital Medical University, China. All patients were investigated for FMEP elicited by transcranial electrical stimulation in the contralateral facial motor cortex...
March 2018: World Neurosurgery
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