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İnhaler anesthetics

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https://www.readbyqxmd.com/read/28734855/effects-of-constant-rate-infusions-of-dexmedetomidine-or-mk-467-on-the-minimum-alveolar-concentration-of-sevoflurane-in-dogs
#1
Rachel C Hector, Marlis L Rezende, Khursheed R Mama, Eugene P Steffey, Heather K Knych, Ann M Hess, Juhana M Honkavaara, Marja R Raekallio, Outi M Vainio
OBJECTIVE: To determine the effects of low and high dose infusions of dexmedetomidine and a peripheral α2-adrenoceptor antagonist, MK-467, on sevoflurane minimum alveolar concentration (MAC) in dogs. STUDY DESIGN: Crossover experimental study. ANIMALS: Six healthy, adult Beagle dogs weighing 12.6±0.9 kg (mean±standard deviation). METHODS: Dogs were anesthetized with sevoflurane in oxygen. After a 60-minute instrumentation and equilibration period, the MAC of sevoflurane was determined in triplicate using the tail clamp technique...
March 4, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28725184/sevoflurane-induces-coherent-slow-delta-oscillations-in-rats
#2
Jennifer A Guidera, Norman E Taylor, Justin T Lee, Ksenia Y Vlasov, JunZhu Pei, Emily P Stephen, J Patrick Mayo, Emery N Brown, Ken Solt
Although general anesthetics are routinely administered to surgical patients to induce loss of consciousness, the mechanisms underlying anesthetic-induced unconsciousness are not fully understood. In rats, we characterized changes in the extradural EEG and intracranial local field potentials (LFPs) within the prefrontal cortex (PFC), parietal cortex (PC), and central thalamus (CT) in response to progressively higher doses of the inhaled anesthetic sevoflurane. During induction with a low dose of sevoflurane, beta/low gamma (12-40 Hz) power increased in the frontal EEG and PFC, PC and CT LFPs, and PFC-CT and PFC-PFC LFP beta/low gamma coherence increased...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28723308/percutaneous-trans-tracheal-endoscopic-approach-a-novel-technique-for-the-excision-of-benign-lesions-of-thoracic-trachea
#3
Suresh C Sharma, K Devaraja, Arvind Kairo, Rakesh Kumar
INTRODUCTION: Currently, neoplasms of the trachea and lower airway demand open transcervical approach with or without thoracotomy. We describe here a novel, minimally invasive approach for an intraluminal lesion of the thoracic trachea, called percutaneous trans-tracheal endoscopic approach (PTEA). Apart from obvious advantages over potentially morbid open procedures, this technique has certain peculiar benefits over rigid or flexible bronchoscopic approach. MATERIALS AND METHODS: A 43-year-old male patient had glomus tumor of thoracic trachea...
July 19, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28717108/isoflurane-is-a-suitable-alternative-to-ether-for-anesthetizing-rats-prior-to-euthanasia-for-gene-expression-analysis
#4
Noriyuki Nakatsu, Yoshinobu Igarashi, Taiki Aoshi, Isao Hamaguchi, Masumichi Saito, Takuo Mizukami, Haruka Momose, Ken J Ishii, Hiroshi Yamada
Diethyl ether (ether) had been widely used in Japan for anesthesia, despite its explosive properties and toxicity to both humans and animals. We also had used ether as an anesthetic for euthanizing rats for research in the Toxicogenomics Project (TGP). Because the use of ether for these purposes will likely cease, it is required to select an alternative anesthetic which is validated for consistency with existing TGP data acquired under ether anesthesia. We therefore compared two alternative anesthetic candidates, isoflurane and pentobarbital, with ether in terms of hematological findings, serum biochemical parameters, and gene expressions...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/28708712/extended-second-window-of-protection-of-sevoflurane-induced-preconditioning
#5
Friederike Behmenburg, Yvonne Boekholt, Patrick van Caster, Marianne Dorsch, André Heinen, Markus W Hollmann, Ragnar Huhn
Late preconditioning (LPC) can be induced by volatile anesthetics and initiates cardioprotection against ischemia/reperfusion injury for three to four days. We investigated the possibility to extend the time window of sevoflurane-induced LPC by repeated sevoflurane administration. An in vivo rat model of regional myocardial ischemia/reperfusion injury was used. Myocardial infarct size was determined by TTC staining at the end of the experiment. In the first series of experiments, male Wistar rats were randomized to five groups (each n=8)...
July 13, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28663624/the-effect-of-preemptive-ankle-block-using-ropivacaine-and-dexamethasone-on-postoperative-analgesia-in-foot-surgery
#6
Ashraf Elsayed Alzeftawy, Nabil Aly Elsheikh
BACKGROUND: Peripheral nerve blocks have become an increasingly popular form of anesthesia. Preemptive analgesia reduces central sensitization, postoperative pain, and analgesic consumption. Different additive has been used to prolong regional blockade and improve postoperative analgesia. AIM: This study was conducted to evaluate whether preemptive ankle block using combination of ropivacaine and dexamethasone would succeed in improving the postoperative analgesia after foot surgery in patients receiving general anesthesia...
April 2017: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/28663616/effect-of-pregabalin-premedication-on-the-requirement-of-anesthetic-and-analgesic-drugs-in-laparoscopic-cholecystectomy-randomized-comparison-of-two-doses
#7
Prasoon Gupta, Anudeep Saxena, Lalita Chaudhary
BACKGROUND: Preoperative medication has a vital role in anesthesia. Pregabalin (PG) is a newer drug of gabapentinoid class and is six times more potent than gabapentin. Our study was designed to evaluate the effect of PG as premedication on the perioperative anesthetic requirement and analgesia. MATERIALS AND METHODS: The study was conducted on ninety patients of American Society of Anesthesiologists Grade I and II of age group 20-60 years, allocated to one of the three groups of thirty patients each...
April 2017: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/28659824/hypersensitivity-of-vagal-pulmonary-afferents-induced-by-tumor-necrosis-factor-alpha-in-mice
#8
Ruei-Lung Lin, Qihai Gu, Lu-Yuan Lee
Tumor necrosis factor alpha (TNFα), a pro-inflammatory cytokine, plays a significant role in the pathogenesis of allergic asthma. Inhalation of TNFα also induces airway hyperresponsiveness in healthy human subjects, and the underlying mechanism is not fully understood. A recent study reported that TNFα caused airway inflammation and a sustained elevation of pulmonary chemoreflex responses in mice, suggesting a possible involvement of heightened sensitivity of vagal pulmonary C-fibers. To investigate this possibility, the present study aimed to investigate the effect of a pretreatment with TNFα on the sensitivity of vagal pulmonary afferents in anesthetized mice...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28658142/use-of-neuromuscular-blockers-and-neostigmine-for-general-anesthesia-and-its-association-with-neuraxial-blockade-a-retrospective-study
#9
Filipe Nadir Caparica Santos, Angélica de Fátima de Assunção Braga, Fernando Eduardo Feres Junqueira, Rafaela Menezes Bezerra, Felipe Ferreira de Almeida, Franklin Sarmento da Silva Braga, Vanessa Henriques Carvalho
This research aimed to assess the use of neuromuscular blockers (NMB) and its reversal, associated or not with neuraxial blockade, after general anesthesia.This retrospective study analyzed 1295 patients that underwent surgery with general anesthesia at Prof. Dr. José Aristodemo Pinotti Hospital in 2013. The study included patients aged >1 year, with complete, readable medical charts and anesthetic records.Rocuronium (ROC) was the most used NMB (96.7%), with an initial dose of 0.60 (0.52-0.74) mg/kg and total dose of 0...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28655457/-occupational-hazards-dna-damage-and-oxidative-stress-on-exposure-to-waste-anesthetic-gases
#10
Lorena M C Lucio, Mariana G Braz, Paulo do Nascimento Junior, José Reinaldo C Braz, Leandro G Braz
BACKGROUND AND OBJECTIVES: The waste anesthetic gases (WAGs) present in the ambient air of operating rooms (OR), are associated with various occupational hazards. This paper intends to discuss occupational exposure to WAGs and its impact on exposed professionals, with emphasis on genetic damage and oxidative stress. CONTENT: Despite the emergence of safer inhaled anesthetics, occupational exposure to WAGs remains a current concern. Factors related to anesthetic techniques and anesthesia workstations, in addition to the absence of a scavenging system in the OR, contribute to anesthetic pollution...
June 24, 2017: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/28638328/protocol-for-the-reconstructing-consciousness-and-cognition-reccognition-study
#11
Kaitlyn L Maier, Andrew R McKinstry-Wu, Ben Julian A Palanca, Vijay Tarnal, Stefanie Blain-Moraes, Mathias Basner, Michael S Avidan, George A Mashour, Max B Kelz
Important scientific and clinical questions persist about general anesthesia despite the ubiquitous clinical use of anesthetic drugs in humans since their discovery. For example, it is not known how the brain reconstitutes consciousness and cognition after the profound functional perturbation of the anesthetized state, nor has a specific pattern of functional recovery been characterized. To date, there has been a lack of detailed investigation into rates of recovery and the potential orderly return of attention, sensorimotor function, memory, reasoning and logic, abstract thinking, and processing speed...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28631452/the-impact-of-the-anaesthetic-conserving-device-on-occupational-exposure-to-isoflurane-among-intensive-care-healthcare-professionals
#12
Jennifer Herzog-Niescery, Heike Vogelsang, Philipp Gude, Hans-Martin Seipp, Horst Bartz, Waldemar Uhl, Thomas P Weber, Martin Bellgardt
BACKGROUND: Use of Anesthetic Conserving Devices (ACD) for inhalational isoflurane sedation in intensive care units (ICU) has grown in recent years, and healthcare professionals are concerned about isoflurane pollution and exposure-related health risks. Real-time measurements to determine isoflurane exposure in ICU personnel during short-term patient care procedures and ACD handling have not yet been performed. METHODS: Isoflurane concentrations in the breathing zones of ICU staff (25 cm around the nose and mouth) were measured, by photoacoustic gas monitoring, during daily practice including tracheal suctioning, oral hygiene, body care, and patient positioning...
June 14, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28617851/severity-classification-of-repeated-isoflurane-anesthesia-in-c57bl-6jrj-mice-assessing-the-degree-of-distress
#13
Katharina Hohlbaum, Bettina Bert, Silke Dietze, Rupert Palme, Heidrun Fink, Christa Thöne-Reineke
According to the EU Directive 2010/63, the severity of a procedure has to be classified as mild, moderate or severe. General anesthesia is thought to be mild, but the Directive does not differentiate between single and repeated anesthesia. Therefore, we investigated the impact of repeated administration of isoflurane, the most commonly used inhalation anesthetic, on the well-being of adult C57BL/6JRj mice, in comparison to single administrations and to untreated animals, when applied six times for 45 min at an interval of 3-4 days...
2017: PloS One
https://www.readbyqxmd.com/read/28616347/intraoperative-care-for-aortic-surgery-using-circulatory-arrest
#14
REVIEW
Félix Ezequiel Fernández Suárez, David Fernández Del Valle, Adrián González Alvarez, Blanca Pérez-Lozano
The total circulatory arrest (CA) is necessary to achieve optimal surgical conditions in certain aortic pathologies, especially in those affecting the ascending aorta and aortic arch. During this procedure it is necessary to protect all the organs of ischemia, especially those of the central nervous system and for this purpose several strategies have been developed. The first and most important protective method is systemic hypothermia. The degree of hypothermia and the route of application have been evolving and currently tend to use moderate hypothermia (MH) (20...
May 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28615047/sensitivity-to-sevoflurane-anesthesia-is-decreased-in-mice-with-a-congenital-deletion-of-guanylyl-cyclase-1-alpha
#15
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/28606281/-effect-of-different-anesthetic-techniques-on-the-prognosis-of-hepatocellular-carcinoma-after-hepatectomy
#16
T Yan, J J Zhao, X Y Bi, J Q Cai, H Zheng
Objective: To investigate the influence of different anesthetic techniques on the prognosis of hepatocellular carcinoma (HCC)after hepatectomy. Methods: A total of 185 consecutive patients with HCC confirmed underwent surgery in Cancer Hospital, Chinese Academy of Medical Sciences were recruited from January 2006 to January 2008. The patients were assessed as American Society of Anesthesiologists (ASA)Ⅰ-Ⅲ, with body mass index (BMI) (22.8±4.6)kg/m(2). There were 169 males, with an average age of 56 years old and 16 females, with an average age of 53 years old...
June 13, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28605687/anesthetic-dependent-changes-in-the-chain-melting-phase-transition-of-dppg-liposomes-studied-using-near-infrared-spectroscopy-supported-by-pca
#17
Marta Kuć, Katarzyna Cieślik-Boczula, Maria Rospenk
The effect of inhalation anesthetics (enflurane, isoflurane, sevoflurane or halothane) on the lipid chain-melting phase transition of negatively charged phospholipid membranes was studied using near-infrared (NIR) spectroscopy supported by Principal Component Analysis (PCA). NIR spectra of anesthetics-mixed dipalmitoylphosphatidylglycerol (DPPG) membranes were recorded in a range of the first overtone of the symmetric and antisymmetric stretching vibrations of CH2 groups of lipid aliphatic chains as a function of increasing temperature...
June 6, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28588337/intra-operative-hyperthermia-in-a-young-angus-bull-with-a-fatal-outcome
#18
Alicia Skelding, Alexander Valverde
A healthy, 9-month-old black Angus bull was presented for elective penile-preputial translocation and caudal epididymectomy. After premedication and induction, general anesthesia was maintained with inhalant anesthetic. Over an hour into the anesthetic period the bull developed severe hyperthermia and hypercapnia that resulted in fatality despite treatment efforts.
June 2017: Canadian Veterinary Journal. la Revue Vétérinaire Canadienne
https://www.readbyqxmd.com/read/28585095/a-clinical-review-of-inhalation-anesthesia-with-sevoflurane-from-early-research-to-emerging-topics
#19
Jorge D Brioni, Shane Varughese, Raza Ahmed, Berthold Bein
A large number of studies during the past two decades have demonstrated the efficacy and safety of sevoflurane across patient populations. Clinical researchers have also investigated the effects of sevoflurane, its hemodynamic characteristics, its potential protective effects on several organ systems, and the incidence of delirium and cognitive deficiency. This review examines the clinical profiles of sevoflurane and other anesthetic agents, and focuses upon emerging topics such as organ protection, postoperative cognitive deficiency and delirium, and novel ways to improve postanesthesia outcomes...
June 5, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28583773/anesthetic-synergy-between-two-n-alkanes
#20
Robert J Brosnan, Fabíola B Fukushima, Trung L Pham
OBJECTIVE: N-butane and n-pentane can both produce general anesthesia. Both compounds potentiate γ-aminobutyric acid type A (GABAA) receptor function, but only butane inhibits N-methyl-d-aspartate (NMDA) receptors. It was hypothesized that butane and pentane would exhibit anesthetic synergy due to their different actions on ligand-gated ion channels. STUDY DESIGN: Prospective experimental study. ANIMALS: A total of four Xenopus laevis frogs and 43 Sprague-Dawley rats...
May 2017: Veterinary Anaesthesia and Analgesia
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