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Anesthetic agents

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https://www.readbyqxmd.com/read/28429067/neuronal-oscillations-and-synchronicity-associated-with-gamma-hydroxybutyrate-during-resting-state-in-healthy-male-volunteers
#1
Robin von Rotz, Michael Kometer, Dario Dornbierer, Jürg Gertsch, M Salomé Gachet, Franz X Vollenweider, Erich Seifritz, Oliver G Bosch, Boris B Quednow
RATIONALE: Gamma-hydroxybutyrate (GHB) is a putative neurotransmitter, a drug of abuse, an anesthetic agent, and a treatment for neuropsychiatric disorders. In previous electroencephalography (EEG) studies, GHB was shown to induce an electrophysiological pattern of "paradoxical EEG-behavioral dissociation" characterized by increased delta and theta oscillations usually associated with sleep during awake states. However, no detailed source localization of these alterations and no connectivity analyses have been performed yet...
April 20, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28424861/s-ketamine-compared-to-etomidate-during-electroconvulsive-therapy-in-major-depression
#2
Maxim Zavorotnyy, Ina Kluge, Kathrin Ahrens, Thomas Wohltmann, Benjamin Köhnlein, Patricia Dietsche, Udo Dannlowski, Tilo Kircher, Carsten Konrad
Objective of the study was to compare two commonly used anesthetic drugs, S-ketamine and etomidate, regarding their influence on seizure characteristics, safety aspects, and outcome of electroconvulsive therapy (ECT) in major depression. Treatment data of 60 patients who underwent a total number of 13 ECTs (median) because of the severe or treatment-resistant major depressive disorder (DSM-IV) were analyzed. Etomidate, mean dosage (SD) = 0.25 (0.04) mg/kg, was used for anesthesia in 29 participants; 31 patients received S-ketamine, mean dosage (SD) = 0...
April 19, 2017: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/28424007/anesthetic-related-neurotoxicity-and-neuroimaging-in-children-a-call-for-conversation
#3
Kara A Bjur, Eric T Payne, Michael E Nemergut, Danqing Hu, Randall P Flick
Each year millions of young children undergo procedures requiring sedation or general anesthesia. An increasing proportion of the anesthetics used are provided to optimize diagnostic imaging studies such as magnetic resonance imaging. Concern regarding the neurotoxicity of sedatives and anesthetics has prompted the US Food and Drug Administration to change labeling of anesthetics and sedative agents warning against repeated or prolonged exposure in young children. This review aims to summarize the risk of anesthesia in children with an emphasis on anesthetic-related neurotoxicity, acknowledge the value of pediatric neuroimaging, and address this call for conversation...
May 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28423080/s-and-r-linalool-a-comparison-of-the-in-vitro-anti-aeromonas-hydrophila-activity-and-anesthetic-properties-in-fish
#4
Lenise L Silva, Luana S Balconi, Letícia T Gressler, Quelen I Garlet, Fernando J Sutili, Agueda P C Vargas, Bernardo Baldisserotto, Ademir F Morel, Berta M Heinzmann
Linalool is the main compound of many essential oils and occurs in two isomeric forms: S-(+)- and R-(-)-linalool. This study aimed to determine if linalool isomers have different antimicrobial and anesthetic properties in fish. For this purpose, these compounds were previously isolated from Lippia alba (Mill.)N. E. Brown and Ocimum americanum L. essential oils. Antimicrobial effects were evaluated through the microdilution test against Aeromonas hydrophila, an important fish disease etiologic agent. Induction time until sedation, anesthesia and recovery time were determined in silver catfish (Rhamdia quelen) through bath exposure (60, 180, 300 or 500 μL L-1)...
January 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28422805/a-randomized-pilot-study-comparing-ketamine-and-methohexital-anesthesia-for-electroconvulsive-therapy-in-patients-with-depression
#5
Shona L Ray-Griffith, Lou Ann Eads, Xiaotong Han, Kimberly Golden, Zachary N Stowe
OBJECTIVE: This randomized controlled pilot study examines the differences in response to electroconvulsive therapy (ECT) as defined by an improvement of depressive symptoms between ketamine and methohexital as the primary anesthetic agent. Adverse effects and cognitive tolerability were also examined. METHODS: Subjects undergoing ECT for unipolar or bipolar depression were randomized to receive ketamine or methohexital as the anesthetic agent. Primary outcome measure includes the Hamilton rating scale for depression (17-item)...
April 18, 2017: Journal of ECT
https://www.readbyqxmd.com/read/28420580/comparative-pharmacodynamic-analysis-of-imidazoline-compounds-using-rat-model-of-ocular-mydriasis-with-a-test-of-quantitative-structure-activity-relationships
#6
Joanna Raczak-Gutknecht, Antoni Nasal, Teresa Frąckowiak, Anita Kornicka, Franciszek Sączewski, Renata Wawrzyniak, Łukasz Kubik, Roman Kaliszan
Imidazol(in)e derivatives, having the chemical structure similar to clonidine, exert diverse pharmacological activities connected with their interactions with alpha2-adrenergic receptors, e.g. hypotension, bradycardia, sedation as well as antinociceptive, anxiolytic, antiarrhythmic, muscle relaxant and mydriatic effects. The mechanism of pupillary dilation observed after systemic administration of imidazol(in)es to rats, mice and cats depends on the stimulation of postsynaptic alpha2-adrenoceptors within the brain...
April 6, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28412715/non-centralized-and-functionally-localized-nervous-system-of-ophiuroids-evidence-from-topical-anesthetic-experiments
#7
Yoshiya Matsuzaka, Eiki Sato, Takeshi Kano, Hitoshi Aonuma, Akio Ishiguro
Ophiuroids locomote along the seafloor by coordinated rhythmic movements of multi-segmented arms. The mechanisms by which such coordinated movements are achieved are a focus of interest from the standpoints of neurobiology and robotics, because ophiuroids appear to lack a central nervous system that could exert centralized control over five arms. To explore the underlying mechanism of arm coordination, we examined the effects of selective anesthesia to various parts of the body of ophiuroids on locomotion. We observed the following: (1) anesthesia of the circumoral nerve ring completely blocked the initiation of locomotion; however, initiation of single arm movement, such as occurs during the retrieval of food, was unaffected, indicating that the inability to initiate locomotion was not due to the spread of the anesthetic agent...
April 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28403803/metabolic-profile-of-flunitrazepam-clinical-and-forensic-toxicological-aspects
#8
Ricardo Jorge Dinis-Oliveira
BACKGROUND: Flunitrazepam is a potent hypnotic, sedative, and amnestic drug used to treat insomnia and as a pre-anesthetic agent. The illicit practice in drug-facilitated sexual assault has been implicating important clinical and forensic issues. OBJECTIVE: In this work the metabolism of flunitrazepam was fully reviewed. METHODS: Flunitrazepam and related known metabolizing enzymes and metabolites were searched in books and in PubMed (U.S...
April 7, 2017: Drug Metabolism Letters
https://www.readbyqxmd.com/read/28397372/k-channel-impairment-determines-sex-and-age-differences-in-epinephrine-mediated-outcomes-after-brain-injury
#9
William M Armstead, John Riley, Monica S Vavilala
Traumatic brain injury (TBI) is the leading cause of injury-related death in children, with boys and children under 4 years having particularly poor outcomes. Activation of ATP- and calcium-sensitive (KATP and KCa ) channels produces cerebrovasodilation and contributes to autoregulation, both of which are impaired after TBI, contributing to poor outcomes. Upregulation of the c-Jun-terminal kinase (JNK) isoform of mitogen-activated protein kinase produces K channel function impairment after CNS injury. Vasoactive agents can be used to normalize cerebral perfusion pressure...
April 11, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28390466/a-nomogram-for-calculation-of-maximum-recommended-dose-by-volume-of-local-anesthetic-in-pediatric-dentistry
#10
David Williams, Theodore Splaver, Jason Walker
PURPOSE: Calculation of maximum recommended doses for local anesthetic agents and added vasopressors is complex and error-prone with potentially fatal consequences. The purpose of this investigation was to develop a nomogram to calculate the maximum recommended doses, expressed as volumes (number of cartridges or ml) of local anesthetic for healthy U.S. pediatric dental patients based on body weight, and test its accuracy and reproducibility. METHODS: Standard mathematical techniques were used to draft the nomogram...
March 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/28379911/treatment-of-pregnant-patients-with-orthopaedic-trauma
#11
Nirmal Tejwani, Kevin Klifto, Christopher Looze, Christopher Scott Klifto
Fracture management in pregnant patients is challenging. Anatomic and physiologic changes in pregnancy increase the complexity of treatment. Maternal trauma increases the risk of fetal loss, preterm birth, placental abruption, cesarean delivery, and maternal death. Initial resuscitation and treatment in a facility equipped to handle the orthopaedic injury and preterm births are paramount. Pelvic and acetabular injuries are potentially life threatening. The benefits and risks of surgical treatment must be carefully considered...
May 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28375916/neuropathic-pain
#12
Lindsay A Zilliox
PURPOSE OF REVIEW: Neuropathic pain is a frequently encountered condition that is often resistant to treatment and is associated with poor patient satisfaction of their treatment. Several medications have been shown to be effective in treating neuropathic pain associated with diabetic neuropathy and postherpetic neuralgia, and these medications are often used to treat neuropathic pain associated with other conditions as well. This article summarizes the diagnosis and assessment of patients with neuropathic pain as well as available pharmacologic and interventional treatment options...
April 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28374060/possible-utility-of-contrast-enhanced-ultrasonography-for-detecting-spread-of-local-anesthetic-in-nerve-block
#13
Hideaki Sasaki, Masanori Yamauchi, Takafumi Ninomiya, Haruyuki Tatsumi, Michiaki Yamakage
PURPOSE: This study demonstrated the effects of perfluorobutane (Sonazoid(®)) with contrast-enhanced ultrasonography (CEUS) to identify the spread of local anesthetics in ultrasound-guided nerve block. METHODS: This study consists of simulation, cadaveric, and animal studies. In a simulation study, 1% lidocaine with 10- to 1000-fold diluted Sonazoid(®), a US-specific contrast agent to diagnose hepatic and breast cancers (0.5 mL), was injected into a resin-based phantom to determine the optimal concentration for ultrasound-guided peripheral nerve block...
April 3, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28367281/intraoperative-management-of-critical-arrhythmia
#14
REVIEW
Chang Hee Kwon, Seong-Hyop Kim
The incidence of intraoperative arrhythmia is extremely high, and some arrhythmias require clinical attention. Therefore, it is essential for the anesthesiologist to evaluate risk factors for arrhythmia and understand their etiology, electrophysiology, diagnosis, and treatment. Anesthetic agents reportedly affect normal cardiac electrical activity. In the normal cardiac cycle, the sinoatrial node initiates cardiac electrical activity through intrinsic autonomous pacemaker activity. Sequential atrial and ventricular contractions result in an effective cardiac pumping mechanism...
April 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28356076/dexmedetomidine-s-inhibitory-effects-on-acetylcholine-release-from-cholinergic-nerves-in-guinea-pig-trachea-a-mechanism-that-accounts-for-its-clinical-benefit-during-airway-irritation
#15
Maya Mikami, Yi Zhang, Benjamin Kim, Tilla S Worgall, Harald Groeben, Charles W Emala
BACKGROUND: Airway instrumentation can evoke upper airway reflexes including bronchoconstriction and cough which can cause serious complications including airway trauma, laryngospasm or bronchospasm which may in turn lead to difficulty with ventilation and hypoxemia. These airway events are mediated in part by irritant-induced neuronal modulation of airway tone and cough responses. We investigated whether the commonly used anesthetic agents dexmedetomidine, lidocaine or remifentanil attenuated neuronal and airway smooth muscle responses in the upper airways of guinea pigs...
March 29, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28353578/rocuronium-induced-neuromuscular-block-and-sugammadex-in-pediatric-patient-with-duchenne-muscular-dystrophy-a-case-report
#16
Ji Eun Kim, Hea Rim Chun
INTRODUCTION: Anesthetic management of patients with Duchenne muscular dystrophy (DMD) is complicated because these patients are more sensitive to nondepolarizing neuromuscular blocking agents (NMBAs) and are vulnerable to postoperative complications, such as postoperative residual curarization and respiratory failure. Sugammadex is a new reversal agent for aminosteroidal NMBAs, but its safety in children is controversial. CLINICAL FEATURES: An 11-year-old boy with DMD underwent general anesthesia for a percutaneous nephrolithotomy...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28352158/cardioprotection-with-halogenated-gases-how-does-it-occur
#17
REVIEW
Jose Luis Guerrero-Orriach, Juan Jose Escalona Belmonte, Alicia Ramirez Fernandez, Marta Ramirez Aliaga, Manuel Rubio Navarro, Jose Cruz Mañas
Numerous studies have studied the effect of halogenated agents on the myocardium, highlighting the beneficial cardiac effect of the pharmacological mechanism (preconditioning and postconditioning) when employed before and after ischemia in patients with ischemic heart disease. Anesthetic preconditioning is related to the dose-dependent signal, while the degree of protection is related to the concentration of the administered drug and the duration of the administration itself. Triggers for postconditioning and preconditioning might have numerous pathways in common; mitochondrial protection and a decrease in inflammatory mediators could be the major biochemical elements...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28350131/ketamine-suppresses-the-substance-p-induced-production-of-il-6-and-il-8-by-human-u373mg-glioblastoma-astrocytoma-cells
#18
Keisuke Yamaguchi, Seiichiro Kumakura, Taisuke Murakami, Akimasa Someya, Eiichi Inada, Isao Nagaoka
The neuropeptide substance P (SP) is an important mediator of neurogenic inflammation within the central and peripheral nervous systems. SP has been shown to induce the expression of pro-inflammatory cytokines implicated in the pathogenesis of several disorders of the human brain via the neurokinin-1 receptor (NK-1R). Ketamine, an intravenous anesthetic agent, functions as a competitive antagonist of the excitatory neurotransmission N-methyl-D‑aspartate (NMDA) receptor, and also antagonizes the NK-1R by interfering with the binding of SP...
February 3, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28342705/comparison-of-20-mannitol-and-3-hypertonic-saline-on-intracranial-pressure-and-systemic-hemodynamics
#19
Navdeep Sokhal, Girija Prasad Rath, Arvind Chaturvedi, Manmohan Singh, Hari Hara Dash
Mannitol and hypertonic saline (HS) are most commonly used hyperosmotic agents for intraoperative brain relaxation. We compared the changes in ICP and systemic hemodynamics after infusion of equiosmolar solutions of both agents in patients undergoing craniotomy for supratentorial tumors. Forty enrolled adults underwent a standard anesthetic induction. Apart from routine monitoring parameters, subdural ICP with Codmann catheter and cardiac indices by Vigileo monitor, were recorded. The patients were randomized to receive equiosmolar solutions of either 20% mannitol (5ml/kg) or 3% HS (5...
March 22, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28342581/neurodevelopmental-outcomes-in-infants-undergoing-general-anesthesia
#20
Kelsey A Nestor, Michelle Zeidan, Erin Boncore, Aaron Richardson, Gijo Alex, Michael Weiss, Saleem Islam
PURPOSE: Preclinical data strongly suggest that all agents used for general anesthesia (GA) have detrimental effects on the developing brain. However, clinical data are unclear. The purpose of this study was to use a cohort of infants who underwent GA and understand their neurodevelopmental outcomes. METHODS: A cohort of infants who underwent GA was selected between 2010 and 2011, and a control group was created. Data regarding GA, procedures, and outcomes were collected in 2015...
March 16, 2017: Journal of Pediatric Surgery
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