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https://www.readbyqxmd.com/read/28102827/a-low-cost-scalable-current-sensing-digital-headstage-for-high-channel-count-%C3%A2%C2%B5ecog
#1
Michael Trumpis, Michele Insanally, Jialin Zou, Ashraf ElSharif, Ali Ghomashchi, N Sertac Artan, Robert Froemke, Jonathan Viventi
OBJECTIVE: High channel count electrode arrays allow for the monitoring of large-scale neural activity at high spatial resolution. Implantable arrays featuring many recording sites require compact, high bandwidth front-end electronics. In the present study, we investigated the use of a small, light weight, and low cost digital current-sensing integrated circuit for acquiring cortical surface signals from a 61-channel micro-electrocorticographic (��ECoG) array. APPROACH: We recorded both acute and chronic ��ECoG signal from rat auditory cortex using our novel digital current-sensing headstage...
January 19, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28102628/transient-symptomatic-worsening-by-atropine-in-opsoclonus-myoclonus-syndrome
#2
Hirotsugu Miyoshi, Ryuji Nakamura, Ayano Yamaga, Toshiaki Haraki, Toshimichi Yasuda, Hiroshi Hamada, Masashi Kawamoto
Opsoclonus-myoclonus syndrome (OMS) is characterized by abnormal eye and systemic involuntary movements, as well as cerebellar ataxia. Some sedatives and anesthetics worsen movements associated with OMS, while there is no known report of a negative effect of atropine. We report on sedation in two patients with OMS. Involuntary movements were transiently worsened after using atropine with midazolam or thiamylal in both, but were not seen when atropine was not used. We speculated that atropine has the potential to exacerbate involuntary movements in OMS due to vulnerability to this agent via unknown mechanisms...
January 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28102579/anatomical-organization-and-somatic-axonal-components-of-the-lumbosacral-nerves-in-female-rabbits
#3
Yolanda Cruz, Isela Hernández-Plata, Rosa Angélica Lucio, René Zempoalteca, Francisco Castelán, Margarita Martínez-Gómez
AIM: To determine the anatomical organization and somatic axonal components of the lumbosacral nerves in female rabbits. METHODS: Chinchilla adult anesthetized female rabbits were used. Anatomical, electrophysiological, and histological studies were performed. RESULTS: L7, S1, and some fibers from S2 and S3 form the lumbosacral trunk, which gives origin to the sciatic nerve and innervation to the gluteal region. From S2 to S3 originates the pudendal nerve, whose branches innervates the striated anal and urethra sphincters, as well as the bulbospongiosus, ischiocavernosus, and constrictor vulvae muscles...
January 19, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28101779/randomized-controlled-trial-of-topical-emla-and-vapocoolant-spray-for-reducing-pain-during-wdpt-vaccination
#4
Navratan Kumar Gupta, Amit Upadhyay, Ajeet Kumar Dwivedi, Astha Agarwal, Vijay Jaiswal, Abhishek Singh
BACKGROUND: Intramuscular vaccination is among the most common source of iatrogenic pain in infants. Vapocoolant sprays are rapid-acting alternative to topical anesthetics. They provide transient anesthesia via evaporation induced skin cooling, and reduce pain due to vaccine injection in children and adults. The objective was to compare the synergistic analgesic effect of eutectic mixture of local anesthetics (EMLA) with breastfeeding (EB group) and vapocoolant spay with breastfeeding (VB group) to that of only breastfeeding (BO group) during whole cell diptheria, pertussis and tetanus (wDPT) vaccination...
January 19, 2017: World Journal of Pediatrics: WJP
https://www.readbyqxmd.com/read/28101752/the-impact-of-hydrocortisone-treatment-on-neutrophil-gelatinase-associated-lipocalin-release-in-porcine-endotoxemic-shock
#5
E Söderberg, M Eriksson, A Larsson, M Lipcsey
BACKGROUND: A key feature of sepsis is systemic inflammatory activation that could be counteracted by steroids. In this experimental model of systemic inflammation, we sought to investigate whether septic neutrophil activation, evaluated by the plasma levels of neutrophil gelatinase-associated protein (NGAL), is modulated by the timing of hydrocortisone treatment. METHODS: Sixteen anesthetized pigs were allocated to one of four equally sized groups. Three of these groups received endotoxin at 2 μg × kg(-1) × h(-1) for 6 h so as to induce endotoxemic shock...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28101419/posterior-rat-eye-during-acute-intraocular-pressure-elevation-studied-using-polarization-sensitive-optical-coherence-tomography
#6
Stanislava Fialová, Marco Augustin, Corinna Fischak, Leopold Schmetterer, Stephan Handschuh, Martin Glösmann, Michael Pircher, Christoph K Hitzenberger, Bernhard Baumann
Polarization sensitive optical coherence tomography (PS-OCT) operating at 840 nm with axial resolution of 3.8 µm in tissue was used for investigating the posterior rat eye during an acute intraocular pressure (IOP) increase experiment. IOP was elevated in the eyes of anesthetized Sprague Dawley rats by cannulation of the anterior chamber. Three dimensional PS-OCT data sets were acquired at IOP levels between 14 mmHg and 105 mmHg. Maps of scleral birefringence, retinal nerve fiber layer (RNFL) retardation and relative RNFL/retina reflectivity were generated in the peripapillary area and quantitatively analyzed...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28100967/anesthetic-management-in-radiofrequency-catheter-ablation-of-ventricular-tachycardia
#7
REVIEW
Yi Deng, Payam S Naeini, Mehdi Razavi, Charles D Collard, Daniel A Tolpin, James M Anton
Radiofrequency catheter ablation is increasingly being used to treat patients who have ventricular tachycardia, and anesthesiologists frequently manage their perioperative care. This narrative review is intended to familiarize anesthesiologists with preprocedural, intraprocedural, and postprocedural implications of this ablation. Ventricular tachycardia typically arises from structural heart disease, most often from scar tissue after myocardial infarction. Many patients thus affected will benefit from radiofrequency catheter ablation in the electrophysiology laboratory to ablate the foci of arrhythmogenesis...
December 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28100946/management-of-young-patients-with-temporomandibular-joint-ankylosis-a-surgical-and-anesthetic-challenge
#8
REVIEW
Devalina Goswami, Sweta Singh, Ongkila Bhutia, Dalim Baidya, Chhavi Sawhney
Temporomandibular joint ankylosis is a unique disease where fracture of the mandibular condyle or any other cause leading to ankylosis of the joint can lead to multiple problems if not detected and treated early. If affected in early years of life, it may cause facial dysmorphism, restricted mouth opening, and difficulty in eating, speech, and sleep. Early surgery and physiotherapy can restore the joint function to a great extent. Anesthetizing a pediatric patient with this disorder is a definite challenge which needs expertise in difficult airway management...
December 2016: Indian Journal of Surgery
https://www.readbyqxmd.com/read/28100723/a-respiratory-gated-micro-ct-comparison-of-respiratory-patterns-in-free-breathing-and-mechanically-ventilated-rats
#9
Nancy L Ford, Lynda McCaig, Andrew Jeklin, James F Lewis, Ruud A W Veldhuizen, David W Holdsworth, Maria Drangova
In this study, we aim to quantify the differences in lung metrics measured in free-breathing and mechanically ventilated rodents using respiratory-gated micro-computed tomography. Healthy male Sprague-Dawley rats were anesthetized with ketamine/xylazine and scanned with a retrospective respiratory gating protocol on a GE Locus Ultra micro-CT scanner. Each animal was scanned while free-breathing, then intubated and mechanically ventilated (MV) and rescanned with a standard ventilation protocol (56 bpm, 8 mL/kg and PEEP of 5 cm H2O) and again with a ventilation protocol that approximates the free-breathing parameters (88 bpm, 2...
January 2017: Physiological Reports
https://www.readbyqxmd.com/read/28100427/the-possible-role-of-propofol-in-drug-induced-torsades-de-pointes-a-real-world-single-center-analysis
#10
Victor A Abrich, Harish Ramakrishna, Arjun Mehta, Farouk Mookadam, Komandoor Srivathsan
BACKGROUND: Torsades de pointes (TdP) is a polymorphic ventricular tachycardia associated with QT prolongation. Propofol is a sedative-anesthetic with proarrhythmic effects on cardiac myocytes. We performed a retrospective study to determine the incidence of TdP following propofol exposure at Mayo Clinic (Rochester, MN) from 08/11/1998-11/20/2015. METHODS: We queried our database using key search terms to identify patients exposed to propofol who developed TdP perioperatively or during non-surgical sedation...
January 4, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28100177/effect-of-desflurane-remifentanil-vs-propofol-remifentanil-anesthesia-on-arterial-oxygenation-during-one-lung-ventilation-for-thoracoscopic-surgery-a-prospective-randomized-trial
#11
Youn Joung Cho, Tae Kyong Kim, Deok Man Hong, Jeong-Hwa Seo, Jae-Hyon Bahk, Yunseok Jeon
BACKGROUND: One-lung ventilation during thoracic surgery frequently disturbs normal systemic oxygenation. However, the effect of anesthetics on arterial oxygenation during one-lung ventilation has not been well established in human study. In this clinical trial, we investigated whether a difference between desflurane-remifentanil and propofol-remifentanil anesthesia can be observed with regard to oxygenation during one-lung ventilation for thoracoscopic surgery. METHODS: Adult patients with lung cancer, scheduled for video-assisted thoracoscopic lobectomy without preoperative oxygen support, were screened and randomized to receive desflurane or propofol, with remifentanil continuous infusion in both groups...
January 18, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28100111/noteworthy-literature-published-in-2016-for-abdominal-organ-transplantation-anesthesiologists
#12
Tetsuro Sakai, Jeron Zerillo
More than 3000 peer-reviewed publications on the topic of liver transplantation were published in 2016. The goal of this article is to provide a concise review of pertinent literature for anesthesiologists who participate in liver transplantation. The authors selected and presented 33 articles published in 2016 on the topics of MELD policy; cardiovascular, pulmonary, and renal issues; coagulation and transfusion; anesthetic agents; hemodynamic monitors; acute liver failure; and donor issues.
January 1, 2017: Seminars in Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28099926/functional-sites-for-anesthetics-in-gabaa-receptors
#13
EDITORIAL
Maria C Maldifassi, Erwin Sigel
No abstract text is available yet for this article.
January 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28099489/acute-inactivation-of-primary-auditory-cortex-causes-a-sound-localisation-deficit-in-ferrets
#14
Katherine C Wood, Stephen M Town, Huriye Atilgan, Gareth P Jones, Jennifer K Bizley
The objective of this study was to demonstrate the efficacy of acute inactivation of brain areas by cooling in the behaving ferret and to demonstrate that cooling auditory cortex produced a localisation deficit that was specific to auditory stimuli. The effect of cooling on neural activity was measured in anesthetized ferret cortex. The behavioural effect of cooling was determined in a benchmark sound localisation task in which inactivation of primary auditory cortex (A1) is known to impair performance. Cooling strongly suppressed the spontaneous and stimulus-evoked firing rates of cortical neurons when the cooling loop was held at temperatures below 10°C, and this suppression was reversed when the cortical temperature recovered...
2017: PloS One
https://www.readbyqxmd.com/read/28099463/the-differential-effects-of-anesthetics-on-bacterial-behaviors
#15
Matthew Chamberlain, Sophia Koutsogiannaki, Matthew Schaefers, Hasan Babazada, Renyu Liu, Koichi Yuki
Volatile anesthetics have been in clinical use for a long period of time and are considered to be promiscuous by presumably interacting with several ion channels in the central nervous system to produce anesthesia. Because ion channels and their existing evolutionary analogues, ion transporters, are very important in various organisms, it is possible that volatile anesthetics may affect some bacteria. In this study, we hypothesized that volatile anesthetics could affect bacterial behaviors. We evaluated the impact of anesthetics on bacterial growth, motility (swimming and gliding) and biofilm formation of four common bacterial pathogens in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28099326/implementation-of-a-needs-based-online-feedback-tool-for-anesthesia-residents-with-subsequent-mapping-of-the-feedback-to-the-acgme-milestones
#16
Pedro Tanaka, Sylvia Bereknyei Merrell, Kim Walker, Jennifer Zocca, Lena Scotto, Alyssa L Bogetz, Alex Macario
BACKGROUND: Optimizing feedback that residents receive from faculty is important for learning. The goals of this study were to (1) conduct focus groups of anesthesia residents to define what constitutes optimal feedback; (2) develop, test, and implement a web-based feedback tool; and (3) then map the contents of the written comments collected on the feedback tool to the Accreditation Council for Graduate Medical Education (ACGME) anesthesiology milestones. METHODS: All 72 anesthesia residents in the program were invited to participate in 1 of 5 focus groups scheduled over a 2-month period...
February 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28099324/interaction-of-isoflurane-tumor-necrosis-factor-%C3%AE-and-%C3%AE-amyloid-on-long-term-potentiation-in-rat-hippocampal-slices
#17
Ran Zhou, Philip Bickler
BACKGROUND: The relationship between inhalational anesthetics such as isoflurane and cognitive impairment in the elderly is controversial. Both β-amyloid peptide (Aβ), associated with Alzheimer disease, and tumor necrosis factor-α (TNF-α), a proinflammatory stress-related peptide, impair the synaptic function. We hypothesized that transient exposure to isoflurane and these peptides would impair synaptic function, manifest as a depression of long-term potentiation (LTP) and paired pulse facilitation (PPF), in the rat hippocampus...
February 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28099321/preoxygenation-physiologic-basis-benefits-and-potential-risks
#18
Usharani Nimmagadda, M Ramez Salem, George J Crystal
Preoxygenation before anesthetic induction and tracheal intubation is a widely accepted maneuver, designed to increase the body oxygen stores and thereby delay the onset of arterial hemoglobin desaturation during apnea. Because difficulties with ventilation and intubation are unpredictable, the need for preoxygenation is desirable in all patients. During emergence from anesthesia, residual effects of anesthetics and inadequate reversal of neuromuscular blockade can lead to hypoventilation, hypoxemia, and loss of airway patency...
February 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28099320/closed-loop-delivery-systems-versus-manually-controlled-administration-of-total-iv-anesthesia-a-meta-analysis-of-randomized-clinical-trials
#19
Laura Pasin, Pasquale Nardelli, Margherita Pintaudi, Massimiliano Greco, Massimo Zambon, Luca Cabrini, Alberto Zangrillo
Bispectral Index Scale (BIS)-guided closed-loop delivery of anesthetics has been extensively studied. We performed a meta-analysis of all the randomized clinical trials comparing efficacy and performance between BIS-guided closed-loop delivery and manually controlled administration of total IV anesthesia. Scopus, PubMed, EMBASE, and the Cochrane Central Register of clinical trials were searched for pertinent studies. Inclusion criteria were random allocation to treatment and closed-loop delivery systems versus manually controlled administration of total IV anesthesia in any surgical setting...
February 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28099287/anesthetic-outcomes-of-children-with-arthrogryposis-syndromes-no-evidence-of-hyperthermia
#20
Stephen J Gleich, Michael Tien, Darrell R Schroeder, Andrew C Hanson, Randall Flick, Michael E Nemergut
BACKGROUND: Arthrogryposis syndromes are a heterogeneous group of disorders characterized by congenital joint contractures often requiring multiple surgeries during childhood to address skeletal and visceral abnormalities. Previous reports suggest that these children have increased perioperative risk, including hypermetabolic events discrete from malignant hyperthermia, difficult airway management, isolated hyperthermia, and difficult IV line placement. We sought to compare children with arthrogryposis multiplex congenita (AMC) versus the less severe, distal arthrogryposis syndromes (DAS) and to evaluate possible intraoperative hyperthermia of patients with AMC...
January 17, 2017: Anesthesia and Analgesia
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