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volatile anesthetics

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https://www.readbyqxmd.com/read/28640784/a-limitation-of-intensive-care-unit-sedation-using-volatile-anesthetics
#1
Hilary P Grocott
No abstract text is available yet for this article.
June 20, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28623471/the-effect-of-intravenous-lidocaine-infusion-on-bispectral-index-during-major-abdominal-surgery
#2
Patrick Bazin, James Padley, Matthew Ho, Jennifer Stevens, Erez Ben-Menachem
Intraoperative lidocaine infusion has become widely accepted as an adjunct to general anesthesia where its use has been associated with opioid-sparing and enhanced recovery. The aims of this study were to determine whether or not intravenous (IV) lidocaine infusion (a) has an anesthetic sparing effect during major colorectal procedures and (b) if it also affects level of hypnosis as measured by bispectral index (BIS). Twenty-five patients undergoing laparotomy for resection of colorectal tumours were randomized to receive either IV lidocaine (1...
June 16, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28617947/poly-r-c-binding-protein-1-mediated-regulation-of-microrna-expression-underlies-post-sevoflurane-amelioration-of-acute-lung-injury-in-rats
#3
Xiaohong Zhao, Xiaoxia Wang, Fei Wang, Changjie Gao, Jian Wang
BACKGROUND: Acute lung injury (ALI) presents a pervasive health burden due to the high morbidity and mortality associated with it. Volatile anesthetics like sevoflurane has been previously shown to have organ-protective effect, both in the context of normal physiological function in liver, and during LPS-induced ALI. Sevoflurane was shown to exert lung protective effect during LPS-induced ALI by modulating expression level of microRNAs (miRNAs), specifically miR-155. The objective of the current study was to define the underlying mechanism by which sevoflurane alters miRNA expression levels...
June 15, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28615047/sensitivity-to-sevoflurane-anesthesia-is-decreased-in-mice-with-a-congenital-deletion-of-guanylyl-cyclase-1-alpha
#4
Yasuko Nagasaka, Martin Wepler, Robrecht Thoonen, Patrick Y Sips, Kaitlin Allen, Jan A Graw, Vincent Yao, Sara M Burns, Stefan Muenster, Peter Brouckaert, Keith Miller, Ken Solt, Emmanuel S Buys, Fumito Ichinose, Warren M Zapol
BACKGROUND: Volatile anesthetics increase levels of the neurotransmitter nitric oxide (NO) and the secondary messenger molecule cyclic guanosine monophosphate (cGMP) in the brain. NO activates the enzyme guanylyl cyclase (GC) to produce cGMP. We hypothesized that the NO-GC-cGMP pathway contributes to anesthesia-induced unconsciousness. METHODS: Sevoflurane-induced loss and return of righting reflex (LORR and RORR, respectively) were studied in wild-type mice (WT) and in mice congenitally deficient in the GC-1α subunit (GC-1(-/-) mice)...
June 14, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28612677/an-unusual-complication-with-the-administration-of-a-volatile-anesthetic-agent-for-status-asthmaticus-in-the-pediatric-intensive-care-unit-case-report-and-review-of-the-literature
#5
Brittany Shutes, W Joshua Frazier, Joseph D Tobias
In severe cases of status asthmaticus, when conventional therapies fail, volatile anesthetic agents remain a therapeutic option. When delivered outside of the operating room setting, specialized delivery techniques are needed to ensure the safe and effective use of volatile anesthetic agents. We present a 16-year-old adolescent with status asthmaticus who required the therapeutic administration of the volatile anesthetic agent, sevoflurane, in the pediatric intensive care unit (PICU). Although initially effective in reducing bronchospasm, progressive hypercarbia developed due to defective functioning of the carbon dioxide absorber of the anesthesia machine...
July 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/28611600/changes-in-alpha-frequency-and-power-of-the-electroencephalogram-during-volatile-based-general-anesthesia
#6
Darren Hight, Logan J Voss, Paul S Garcia, Jamie Sleigh
Oscillations in the electroencephalogram (EEG) at the alpha frequency (8-12 Hz) are thought to be ubiquitous during surgical anesthesia, but the details of how this oscillation responds to ongoing changes in volatile anesthetic concentration have not been well characterized. It is not known how often alpha oscillations are absent in the clinical context, how sensitively alpha frequency and power respond to changes in anesthetic concentration, and what effect increased age has on alpha frequency. Bipolar EEG was recorded frontally from 305 patients undergoing surgery with sevoflurane or desflurane providing general anesthesia...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28600454/the-slo-w-path-to-identifying-the-mitochondrial-channels-responsible-for-ischemic-protection
#7
REVIEW
Charles Owen Smith, Keith Nehrke, Paul S Brookes
Mitochondria play an important role in tissue ischemia and reperfusion (IR) injury, with energetic failure and the opening of the mitochondrial permeability transition pore being the major causes of IR-induced cell death. Thus, mitochondria are an appropriate focus for strategies to protect against IR injury. Two widely studied paradigms of IR protection, particularly in the field of cardiac IR, are ischemic preconditioning (IPC) and volatile anesthetic preconditioning (APC). While the molecular mechanisms recruited by these protective paradigms are not fully elucidated, a commonality is the involvement of mitochondrial K(+) channel opening...
June 9, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28580087/successful-early-application-of-extracorporeal-membrane-oxygenation-to-support-cardiopulmonary-resuscitation-for-a-patient-suffering-from-severe-malignant-hyperthermia-and-cardiac-arrest-a-case-report
#8
Hyub Huh, Jae Seung Jung, Sang Jae Park, Min Kyung Park, Choon Hak Lim, Seung Zhoo Yoon
Malignant hyperthermia (MH) may lead to metabolic crisis of skeletal muscle in susceptible individuals following exposure to triggering agents such as volatile anesthetics or depolarizing muscle relaxants. MH is a rare and a potentially lethal disease, which can lead to cardiac arrest. We report a case of severe MH, in which the rapidly evolving signs of hypermetabolism eventually resulted in cardiac arrest. Despite conventional treatments following cardiopulmonary resuscitation, the patient's vital signs did not improve...
June 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28574372/monitoring-the-depth-of-anesthesia-using-a-new-adaptive-neuro-fuzzy-system
#9
Ahmad Shalbaf, Mohsen Saffar, Jamie W Sleigh, Reza Shalbaf
Accurate and noninvasive monitoring of the depth of anesthesia (DoA) is highly desirable. Since the anesthetic drugs act mainly on the central nervous system, the analysis of brain activity using electroencephalogram (EEG) is very useful. This paper proposes a novel automated method for assessing the DoA using EEG. Firstly, 11 features including spectral, fractal and entropy are extracted from EEG signal and then, by applying an algorithm according to exhaustive search of all subsets of features, a combination of the best features (Beta-index, sample entropy, shannon permutation entropy and detrended fluctuation analysis) is selected...
May 29, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28562386/neurotoxicity-of-anesthetic-drugs-an-update
#10
Federico Bilotta, Lis A Evered, Shaun E Gruenbaum
PURPOSE OF REVIEW: This article reviews the most recently published evidence that investigated anesthesia-induced neurotoxicity in both animals and humans, especially as it pertains to the perinatal period. RECENT FINDINGS: Several recent studies have focused on better understanding the complex mechanisms that underlie intravenous and volatile anesthesia-induced neurotoxicity in animals. Adjuvant agents that target these pathways have been investigated for their effectiveness in attenuating the neuroapoptosis and neurocognitive deficits that result from anesthesia exposure, including dexmedetomidine, rutin, vitamin C, tumor necrosis factor α, lithium, apocynin, carreic acid phenethyl ester...
May 27, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28539818/isoflurane-preconditioning-inhibits-the-effects-of-tissue-type-plasminogen-activator-on-brain-endothelial-cell-in-an-in-vitro-model-of-ischemic-stroke
#11
So Yeong Cheon, So Yeon Kim, Eun Hee Kam, Jae Hoon Lee, Jeong Min Kim, Eun Jung Kim, Tae Whan Kim, Bon-Nyeo Koo
Tissue-type plasminogen activator (tPA) is the only treatment for ischemic stroke. However, tPA could induce the intracranial hemorrhage (ICH), which is the main cause of death in ischemic stroke patient after tPA treatment. At present, there is no treatment strategy to ameliorate tPA-induced brain injury after ischemia. Therefore, we investigated the effect of pre-treated isoflurane, which is a volatile anesthetic and has beneficial effects on neurological dysfunction, brain edema and infarct volume in ischemic stroke model...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28533194/mortality-in-cardiac-surgery-myriad-a-randomized-controlled-trial-of-volatile-anesthetics-rationale-and-design
#12
Giovanni Landoni, Vladimir Lomivorotov, Antonio Pisano, Caetano Nigro Neto, Umberto Benedetto, Giuseppe Biondi Zoccai, Marco Gemma, Samuele Frassoni, Felice Eugenio Agrò, Massimo Baiocchi, Filomena R Barbosa Gomes Galas, Andrei Bautin, Nikola Bradic, Cristiana Carollo, Giuseppe Crescenzi, Abeer M Elnakera, Mohamed R El-Tahan, Evgeny Fominskiy, Ahmed G Farag, Gordana Gazivoda, Stefano Gianni, Evgeny Grigoryev, Fabio Guarracino, Sidik Hanafi, Weiqing Huang, Gudrun Kunst, Jan Kunstyr, Chong Lei, Rosalba Lembo, Zhi-Jian Li, Valery Likhvantsev, Andrey Lozovskiy, Jun Ma, Fabrizio Monaco, Paolo Navalesi, Bukamal Nazar, Vadim Pasyuga, Elena Porteri, Colin Royse, Laura Ruggeri, Hynek Riha, Fernanda Santos Silva, Luca Severi, Vladimir Shmyrev, Nikolay Uvaliev, Cheng Bin Wang, Chew-Yin Wang, Dario Winterton, Chow-Yen Yong, Jingui Yu, Rinaldo Bellomo, Alberto Zangrillo
OBJECTIVE: There is initial evidence that the use of volatile anesthetics can reduce the postoperative release of cardiac troponin I, the need for inotropic support, and the number of patients requiring prolonged hospitalization following coronary artery bypass graft (CABG) surgery. Nevertheless, small randomized controlled trials have failed to demonstrate a survival advantage. Thus, whether volatile anesthetics improve the postoperative outcome of cardiac surgical patients remains uncertain...
May 19, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28506542/coronary-sinus-isoflurane-concentration-in-cardiac-surgery
#13
Ka Ting Ng, R Peter Alston, George Just, Chris McKenzie
OBJECTIVE: Volatile anesthetic agents such as isoflurane may be associated with fewer adverse myocardial events compared with total intravenous anesthesia in cardiac surgery. The authors aimed to determine whether reasonable isoflurane concentrations at tissue level were being achieved to protect the myocardium using this agent. The isoflurane concentration in myocardium has never been measured. The primary aim was to sample coronary sinus (CS) blood and measure its isoflurane concentration...
March 9, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28480032/neuroprotection-provided-by-isoflurane-pre-conditioning-and-post-conditioning
#14
REVIEW
Ming Jiang, Liang Sun, Dong-Xia Feng, Zheng-Quan Yu, Rong Gao, Yuan-Zhao Sun, Gang Chen
Isoflurane, a volatile and inhalational anesthetic, has been extensively used in perioperative period for several decades. A large amount of experimental studies have indicated that isoflurane exhibits neuroprotective properties when it is administrated before or after (pre-conditioning and post-conditioning) neurodegenerative diseases (e.g., hypoxic ischemia, stroke and trauma). Multiple mechanisms are involved in isoflurane induced neuroprotection, including activation of glycine and γ-aminobutyric acid receptors, antagonism of ionic channels and alteration of the function and activity of other cellular proteins...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28480028/a-comparison-of-renal-responses-to-sevoflurane-and-isoflurane-in-patients-undergoing-donor-nephrectomy-a-randomized-controlled-trial
#15
Lady Christine L Ong Sio, Richard Glenn C Dela Cruz, Alexander F Bautista
Sevoflurane and isoflurane are volatile halogenated ether widely used in anesthesia. Both have comparable potency and easy titratability but sevoflurane has lower pungency and results in faster patient recovery. Isoflurane, however, is more affordable. The nephrotoxicity of sevoflurane is undisputed but studies on isoflurane nephrotoxicity are lacking. The objective of this paper is to determine the overall nephrotoxicity profile of sevoflurane and isoflurane in donor nephrectomy patients using the renal function markers - nuclear glomerular filtration rate (GFR), serum creatinine, urine protein-to-creatinine ratio, proteinuria, and glucosuria...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28416648/isoflurane-modulates-activation-and-inactivation-gating-of-the-prokaryotic-na-channel-nachbac
#16
Rheanna M Sand, Kevin J Gingrich, Tamar Macharadze, Karl F Herold, Hugh C Hemmings
Voltage-gated Na(+) channels (Nav) have emerged as important presynaptic targets for volatile anesthetic (VA) effects on synaptic transmission. However, the detailed biophysical mechanisms by which VAs modulate Nav function remain unclear. VAs alter macroscopic activation and inactivation of the prokaryotic Na(+) channel, NaChBac, which provides a useful structural and functional model of mammalian Nav Here, we study the effects of the common general anesthetic isoflurane on NaChBac function by analyzing macroscopic Na(+) currents (INa) in wild-type (WT) channels and mutants with impaired (G229A) or enhanced (G219A) inactivation...
June 5, 2017: Journal of General Physiology
https://www.readbyqxmd.com/read/28412755/randomized-clinical-trial-comparing-the-effects-of-sevoflurane-and-propofol-on-carbon-dioxide-embolism-during-pneumoperitoneum-in-laparoscopic-hepatectomy
#17
Yu Hong, Yu Xin, Fei Yue, He Qi, Cai Jun
Laparoscopic hepatectomy carries a high risk of gas embolism due to the extensive hepatic transection plane and large hepatic vena cava. Here, we compared the influence of inhaled and intravenous anesthetics on gas embolism during laparoscopic hepatectomy. Fifty patients undergoing laparoscopic hepatectomy were divided into two groups to receive sevoflurane anesthesia (group S, n = 25) or intravenous propofol anesthesia (group p, n = 25). During the operation, gas emboli were detected by transesophageal echocardiography and graded according to their size...
April 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28400695/volatile-anesthetic-for-management-of-super-refractory-status-epilepticus
#18
Gaurav Singh Tomar, Indu Kapoor, Charu Mahajan, Hemanshu Prabhakar
No abstract text is available yet for this article.
March 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28400117/phosphatidylinositol-3-kinase-inhibition-induces-vasodilator-effect-of-sevoflurane-via-reduction-of-rho-kinase-activity
#19
Yasunori Miyamoto, Guo-Gang Feng, Shiho Satomi, Katsuya Tanaka, Yoshihiro Fujiwara, Hiroyuki Kinoshita
AIMS: This study was aimed to examine whether a volatile anesthetic sevoflurane in clinical doses reduces vasoconstriction under the inhibition of phosphatidylinositol 3-kinase (PI3K) in the rat and human arteries and whether the intravenous administration of the PI3K inhibitor decreases blood pressure in rats under the sevoflurane inhalation. MATERIALS AND METHODS: Rat arteries (n=5-6) and human omental arteries (n=5-6) were subjected to isometric force recordings and western immunoblotting for Rho kinase, mitogen-activated protein kinase, and protein kinase C...
April 8, 2017: Life Sciences
https://www.readbyqxmd.com/read/28373535/dantrolene-requires-mg-2-to-arrest-malignant-hyperthermia
#20
Rocky H Choi, Xaver Koenig, Bradley S Launikonis
Malignant hyperthermia (MH) is a clinical syndrome of skeletal muscle that presents as a hypermetabolic response to volatile anesthetic gases, where susceptible persons may develop lethally high body temperatures. Genetic predisposition mainly arises from mutations on the skeletal muscle ryanodine receptor (RyR). Dantrolene is administered to alleviate MH symptoms, but its mechanism of action and its influence on the Ca(2+) transients elicited by MH triggers are unknown. Here, we show that Ca(2+) release in the absence of Mg(2+) is unaffected by the presence of dantrolene but that dantrolene becomes increasingly effective as cytoplasmic-free [Mg(2+)] (free [Mg(2+)]cyto) passes mM levels...
May 2, 2017: Proceedings of the National Academy of Sciences of the United States of America
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