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https://www.readbyqxmd.com/read/29470316/protecting-the-brain-with-xenon-anesthesia-for-neurosurgical-procedures
#1
Anna Rylova, Mervyn Maze
Xenon possesses some, but not all, of the clinical features of an ideal anesthetic agent. Besides well-known advantages of rapid awakening, stable hemodynamics and lack of biotransformation, preclinical data lead to the expectation of xenon's advantageous use for settings of acute ongoing brain injury; a single randomized clinical trial using an imaging biomarker for assessing brain injury corroborated xenon's preclinical efficacy in protecting the brain from further injury. In this review, we discuss the mechanisms and hence the putative applications of xenon for brain protection in neurosurgery...
February 21, 2018: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/29424792/in-depth-characterization-of-the-effects-of-cigarette-smoke-exposure-on-the-acute-trauma-response-and-hemorrhage-in-mice
#2
Clair Hartmann, Michael Gröger, Jan-Philipp Noirhomme, Angelika Scheuerle, Peter Möller, Ulrich Wachter, Markus Huber-Lang, Benedikt Nussbaum, Birgit Jung, Tamara Merz, Oscar McCook, Sandra Kress, Bettina Stahl, Enrico Calzia, Michael Georgieff, Peter Radermacher, Martin Wepler
INTRODUCTION: Hemorrhagic shock accounts for a large amount of trauma-related mortality. The severity of trauma can be further aggravated by an additional blunt chest trauma (TxT), which independently contributes to mortality upon the development of an acute lung injury (ALI). Besides, cigarette smoke (CS) exposure before TxT enhanced posttraumatic inflammation, thereby aggravating ALI. We therefore aimed to characterize the impact of an acute and/or chronic lung injury on organ dysfunction in a murine model of traumatic hemorrhagic shock (HS)...
February 8, 2018: Shock
https://www.readbyqxmd.com/read/29404778/waste-anesthetic-gas-exposure-and-strategies-for-solution
#3
REVIEW
Hai-Bo Deng, Feng-Xian Li, Ye-Hua Cai, Shi-Yuan Xu
As inhaled anesthetics are widely used, medical staff have inevitably suffered from exposure to anesthetic waste gases (WAGs). Whether chronic exposure to WAGs has an impact on the health of medical staff has long been a common concern, but conclusions are not consistent. Many measures and equipment have been proposed to reduce the concentration of WAGs as far as possible. This review aims to dissect the current exposure to WAGs and its influence on medical staff in the workplace and the environment, and summarize strategies to reduce WAGs...
February 5, 2018: Journal of Anesthesia
https://www.readbyqxmd.com/read/29371097/akt-activation-improves-microregional-oxygen-supply-consumption-balance-after-cerebral-ischemia-reperfusion
#4
Harvey R Weiss, Oak Z Chi, Geza K Kiss, Xia Liu, Stacey Damito, Estela Jacinto
There have been reports that activation of Akt may provide neuroprotection after cerebral ischemia-reperfusion. We tested the hypothesis that activation of Akt would decrease infarct size and improve microregional O2 supply/consumption balance after cerebral ischemia-reperfusion. This hypothesis was tested in isoflurane-anesthetized rats with middle cerebral artery blockade for 1 hr and reperfusion for 2 hr with or without SC-79 (Akt activator, 0.05 mg/kg, three doses). Regional cerebral blood flow was determined using a C14-iodoantipyrine autoradiographic technique...
January 22, 2018: Brain Research
https://www.readbyqxmd.com/read/29359969/effects-of-two-fractions-of-inspired-oxygen-during-anesthesia-on-early-postanesthesia-oxygenation-in-healthy-dogs
#5
Manuel Martin-Flores, Chia T Tseng, Steven D Robillard, Brittany E Abrams, Luis Campoy, H Jay Harvey, Robin D Gleed
OBJECTIVE To evaluate the effects of 2 fractions of inspired oxygen (Fio 2 s) during anesthesia on postanesthesia Pao 2 and other measures of oxygen exchange. ANIMALS 22 healthy adult sexually intact female dogs undergoing ovariohysterectomy by ventral midline celiotomy. PROCEDURES Dogs were randomly assigned to receive either oxygen (Fio 2 > 0.9 [100% oxygen]; n = 11; control group) or a mixture of nitrogen and oxygen (Fio 2 = 0.4; 11; 40% oxygen group) as the carrier gas for isoflurane while anesthetized...
February 2018: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/29344445/comparing-postoperative-complications-and-inflammatory-markers-using-total-intravenous-anesthesia-versus-volatile-gas-anesthesia-for-pancreatic-cancer-surgery
#6
Jose M Soliz, Ifeyinwa C Ifeanyi, Mathew H Katz, Jonathan Wilks, Juan P Cata, Thomas McHugh, Jason B Fleming, Lei Feng, Thomas Rahlfs, Morgan Bruno, Vijaya Gottumukkala
Objectives: The objective of this study is to evaluate postoperative complications and inflammatory profiles when using a total intravenous anesthesia (TIVA) or volatile gas-opioid (VO) based anesthesia in patients undergoing pancreatic cancer surgery. Methods: Design, retrospective propensity score matched cohort; Setting, major academic cancer hospital; Patients, all patients who had pancreatic surgery between November 2011 and August 2014 were retrospectively reviewed...
August 2017: Anesthesiology and Pain Medicine
https://www.readbyqxmd.com/read/29320927/benefits-of-using-high-volume-low-pressure-tracheal-tube-in-children-undergoing-congenital-cardiac-surgery-evidence-from-a-prospective-randomized-study
#7
Rakesh Chand, Saibal Roy Chowdhury, Emmanuel Rupert, Chandan Kumar Mandal, Pradeep Narayan
BACKGROUND: In the past 2 decades, usage of high-volume-low-pressure microcuffed tracheal tubes in smaller children has increased. However, there is paucity of evidence of its usage in smaller children undergoing congenital cardiac surgery. The aim of this study was to assess if microcuff endotracheal tubes in neonates and younger children undergoing congenital cardiac surgery is associated with better outcomes than uncuffed tubes. METHODS: We carried out this single-center, prospective, randomized study between June and November 2016...
January 1, 2018: Seminars in Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29315308/mac-sparing-effect-of-nitrous-oxide-in-sevoflurane-anesthetized-sheep-and-its-reversal-with-systemic-atipamezole-administration
#8
Lauren Duffee, Nicolò Columbano, Antonio Scanu, Valentino Melosu, Giovanni Mario Careddu, Giovanni Sotgiu, Bernd Driessen
INTRODUCTION: Nitrous oxide (N2O) is an anesthetic gas with antinociceptive properties and reduces the minimum alveolar concentration (MAC) for volatile anesthetic agents, potentially through mechanisms involving central alpha2-adrenoceptors. We hypothesized that 70% N2O in the inspired gas will significantly reduce the MAC of sevoflurane (MACSEVO) in sheep, and that this effect can be reversed by systemic atipamezole. MATERIALS AND METHODS: Animals were initially anesthetized with SEVO in oxygen (O2) and exposed to an electrical current as supramaximal noxious stimulus in order to determine MACSEVO (in duplicates)...
2018: PloS One
https://www.readbyqxmd.com/read/29297798/evaluation-of-blood-gas-values-in-anesthetized-southern-white-rhinoceros-ceratotherium-simum-ventilated-with-a-novel-demand-ventilator-in-a-zoological-park-setting
#9
Mark Jeon, Khursheed R Mama, Jeffrey R Zuba, Nadine Lamberski, James E Oosterhuis, Meredith M Clancy, Katie W Delk, Matthew E Kinney, Patrick J Morris, Francisco Olea-Popelka
Rhinoceros conservation efforts are essential to the survival of the species. One such effort is focused on using advanced reproductive technologies to produce viable northern white rhinoceros ( Ceratotherium simum cottoni) embryos for implantation into southern white rhinoceros ( Ceratotherium simum simum) surrogates. Anesthesia may be required to facilitate necessary procedures in these surrogate rhinoceros, but commonly reported side effects including hypercapnia and hypoxemia limit anesthetic recumbency time due to animal safety concerns...
December 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/29251003/the-physiology-and-toxicology-of-acute-inhalation-phosphine-poisoning-in-conscious-male-rats
#10
Benjamin Wong, Rebecca Lewandowski, Justin Tressler, Katherine Sherman, Jaclynn Andres, Jennifer Devorak, Cristin Rothwell, Tracey Hamilton, Heidi Hoard-Fruchey, Alfred M Sciuto
Phosphine (PH3) is a toxidrome-spanning chemical that is widely used as an insecticide and rodenticide. Exposure to PH3 causes a host of target organ and systemic effects, including oxidative stress, cardiopulmonary toxicity, seizure-like activity and overall metabolic disturbance. A custom dynamic inhalation gas exposure system was designed for the whole-body exposure of conscious male Sprague-Dawley rats (250-350 g) to PH3. An integrated plethysmography system was used to collect respiratory parameters in real-time before, during and after PH3 exposure...
December 18, 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/29242980/environmental-and-biological-measurements-of-isoflurane-and-sevoflurane-in-operating-room-personnel
#11
Abbas Jafari, Rogaieh Bargeshadi, Fatemeh Jafari, Iraj Mohebbi, Mohammad Hajaghazadeh
PURPOSE: The present study aimed to compare the concentration of isoflurane and sevoflurane in the individual's breathing zone and ambient air of operating rooms (ORs), to investigate the correlation between breathing zone levels and urinary concentrations, and to evaluate the ORs pollution in the different working hours and weeks. METHODS: Environmental and biological concentrations of isoflurane and sevoflurane were evaluated at 9ORs. Air samples were collected by active sampling method and urine samples were collected from each subject at the end of the work shift...
December 15, 2017: International Archives of Occupational and Environmental Health
https://www.readbyqxmd.com/read/29239956/the-anesthesia-workstation-quo-vadis
#12
Jan F A Hendrickx, Andre M De Wolf
Ensuring adequate ventilation and oxygenation and delivering inhaled anesthetic agent to the patient remain core responsibilities of the anesthesia provider during general anesthesia. Because of the emphasis placed on physiology, pharmacology, clinical sciences, and administrative duties, the stellar anesthesia workstation technology may be underutilized by the anesthesia community. Target-controlled O2 and agent delivery and automated end-expired CO2 control have entered the clinical arena, with only cost, luddism, and administrative hurdles preventing their more widespread use...
December 11, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29238880/in-vitro-performance-of-prefilled-co2-absorbers-with-the-zeus%C3%A2
#13
Mohab Omer, Jan F A Hendrickx, Simon De Ridder, Alexander De Houwer, Rik Carette, Sofie De Cooman, Andre M De Wolf
Low fresh gas flows (FGFs) decrease the use of anesthetic gases, but increase CO2 absorbent usage. CO2 absorbent usage remains poorly quantified. The goal of this study is to determine canister life of 8 commercially available CO2 absorbent prepacks with the Zeus®. Pre-packed CO2 canisters of 8 different brands were tested in vitro: Amsorb Plus, Spherasorb, LoFloSorb, LithoLyme, SpiraLith, SpheraSorb, Drägersorb 800+, Drägersorb Free, and CO2ntrol. CO2 (160 mL min- 1) flowed into the tip of a 2 L breathing bag that was ventilated with a tidal volume of 500 mL, a respiratory rate of 10/min, and an I:E ratio of 1:1 using the controlled mechanical ventilation mode of the Zeus® (Dräger, Lubeck, Germany)...
December 13, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29233951/exposure-assessment-biological-monitoring-and-liver-function-tests-of-operating-room-personnel-exposed-to-halothane-in-hamedan-hospitals-west-of-iran
#14
Mohammad Hossien Bakhshaei, Abdorrahman Bahrami, Amin Mirzakhani, Hossien Mahjub, Mohammad Javad Assari
BACKGROUND: Occupational exposure to halogenated hydrocarbons has been associated with halothane hepatitis, an increase of liver enzymes, and congenital malformations. The objectives of this study were to investigate whether bromide, a urinary metabolite of halothane, could be used as a biological marker of exposure to this anesthetic gas and assessment of associated exposure to halothane with any significant changes in conventional parameters of liver function (serum aminotransferase activities)...
November 4, 2017: Journal of Research in Health Sciences
https://www.readbyqxmd.com/read/29210379/porous-dipeptide-crystals-as-volatile-drug-vessels
#15
S Bracco, D Asnaghi, M Negroni, P Sozzani, A Comotti
Porous crystalline dipeptides absorb, reversibly from the gas phase, a series of volatile fluorinated ethers in use as anesthetics. Their vapor pressure was considerably reduced, with favorable guest capture and release. Variable channel sizes were customized for selective sorption and pressure thresholds were observed in the narrowest pores. 1H, 13C and 19F MAS NMR coupled with ab initio conformational analysis and grand canonical Monte Carlo simulations highlight the guest loading and arrangement adopted in the congruent nanochannels, suggesting how the anesthetics can accommodate in biochemical receptors...
December 6, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29199541/impact-of-temperature-on-the-narcotrend-index-during-hypothermic-cardiopulmonary-bypass-in-children-with-sevoflurane-anesthesia
#16
Nils Dennhardt, Christiane Beck, Dietmar Boethig, Sebastian Heiderich, Alexander Horke, Sebastian Tiedge, Martin Boehne, Robert Sümpelmann
BACKGROUND: During cardiopulmonary bypass (CPB) in children, anesthesia maintained by sevoflurane administered via the oxygenator is increasingly common. Anesthetic uptake and requirement may be influenced by the non-physiological conditions during hypothermic CPB. Narcotrend-processed EEG monitoring may, therefore, be useful to guide the administration of sevoflurane during this phase. OBJECTIVE: The objective of this prospective, clinical, observational study was to assess the correlation between body temperature, Narcotrend Index (NI) and administered sevoflurane in children during CPB...
December 1, 2017: Perfusion
https://www.readbyqxmd.com/read/29169225/a-comparison-of-the-effects-of-isoflurane-versus-propofol-remifentanil-anesthesia-on-oxygen-delivery-during-thoracoscopic-lung-lobectomy-with-one-lung-ventilation-in-dogs
#17
Jiyoung Park, Hae-Beom Lee, Seong Mok Jeong
This study compared effects of isoflurane inhalation (ISO) and propofol-remifentanil combined total intravenous anesthesia (TIVA) on oxygenation during thoracoscopic lung lobectomy with 30-minute one-lung ventilation (1LV). Thoracoscopic right middle lung lobectomy was performed in ten dogs divided into ISO and TIVA group and cardiopulmonary parameters were measured with blood gas analysis. Throughout the study, isoflurane was inhaled up to 1.5%, and the infusion rates of propofol and remifentanil were 0.2~0...
November 23, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/29159929/s100%C3%AE-in-newborns-after-c-section-with-general-vs-epidural-anesthesia-a-prospective-observational-study
#18
Z Xu, Z Liu, Y Zhang, C Jin, F Shen, Y Yu, T Cheek, O Onuoha, G Liang, R Month, J Atkins, K M Tran, H Wei
BACKGROUND: Preclinical evidence suggests that general anesthetics can dose dependently induce neurodegeneration in the developing brains of animals which can be reliably determined by measurement of blood S100β, but this correlation remains unclear in humans. We hypothesized that S100β would not be increased in cord arterial blood of fetuses exposed briefly to general anesthetics during a C-section, compared with epidural anesthesia. METHODS: A prospective observational clinical study comparatively measured changes of brain damage biomarker S100β ratio of umbilical artery over vein (changes after fetus circulation) immediately after delivery under C-section with either epidural or general anesthesia...
November 20, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/29150782/nitrous-oxide-added-at-the-end-of-isoflurane-anesthesia-hastens-early-recovery-without-increasing-the-risk-for-postoperative-nausea-and-vomiting-a-randomized-clinical-trial
#19
Boris Mraovic, Tatjana Simurina, Tong J Gan
BACKGROUND: Nitrous oxide (N2O) has been reported to increase the risk of postoperative nausea and vomiting (PONV) in a dose-dependent manner. We investigated the effect of adding N2O at the end of isoflurane inhalational anesthesia on the recovery and incidence of PONV. Our hypothesis was that N2O would reduce the time to early recovery without increasing the incidence of PONV. METHODS: After obtaining ethics committee approval and written informed consent, 100 women at American Society of Anesthesiologists physical status I-III and scheduled for laparoscopic-assisted vaginal hysterectomy were randomized into two groups (G) according to the carrier gas: GO2 (air in 30% oxygen) and GN2O (the same mixture until the last 30 min of surgery, when 70% N2O in 30% oxygen was used)...
November 17, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29138115/active-forms-of-akt-and-erk-are-dominant-in-the-cerebral-cortex-of-newborn-pigs-that-are-unaffected-by-asphyxia
#20
Viktória Kovács, Valéria Tóth-Szűki, János Németh, Viktória Varga, Gábor Remzső, Ferenc Domoki
AIMS: Perinatal asphyxia (PA) often results in hypoxic-ischemic encephalopathy (HIE) in term neonates. Introduction of therapeutic hypothermia improved HIE outcome, but further neuroprotective therapies are still warranted. The present study sought to determine the feasibility of the activation of the cytoprotective PI-3-K/Akt and the MAPK/ERK signaling pathways in the subacute phase of HIE development in a translational newborn pig PA/HIE model. MAIN METHODS: Phosphorylated and total levels of Akt and ERK were determined by Western blotting in brain samples obtained from untreated naive, time control, and PA/HIE animals at 24-48h survival (n=3-3-6,respectively)...
November 11, 2017: Life Sciences
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