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oxygen concentration during anesthesia

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https://www.readbyqxmd.com/read/28922228/anesthesia-capacity-in-ghana-a-teaching-hospital-s-resources-and-the-national-workforce-and-education
#1
Mark A Brouillette, Alfred J Aidoo, Maria A Hondras, Nana A Boateng, Akwasi Antwi-Kusi, William Addison, Alec R Hermanson
BACKGROUND: Quality anesthetic care is lacking in low- and middle-income countries (LMICs). Global health leaders call for perioperative capacity reports in limited-resource settings to guide improved health care initiatives. We describe a teaching hospital's resources and the national workforce and education in this LMIC capacity report. METHODS: A prospective observational study was conducted at Komfo Anokye Teaching Hospital (KATH) in Kumasi, Ghana, during 4 weeks in August 2016...
September 14, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28922226/effect-of-high-inspiratory-oxygen-fraction-on-endothelial-function-in-healthy-volunteers-a-randomized-controlled-crossover-pilot-study
#2
Mikkel Hjordt Holm Larsen, Sarah Ekeloef, Dunja Kokotovic, Anne-Marie Schou-Pedersen, Jens Lykkesfeldt, Ismail Gögenür
It has been suggested that high inspiratory oxygen concentrations during anesthesia may be associated with higher postoperative mortality due to endothelial dysfunction. A randomized controlled crossover study was conducted with 25 healthy male volunteers. They inhaled an oxygen concentration of 30% and 80%. The endothelial function was assessed using noninvasive digital pulse amplitude tonometry (EndoPAT) supported by endothelial biomarkers. The difference in endothelial function between the 2 treatments was 0...
September 14, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28914327/repeated-2-sevoflurane-administration-in-7%C3%A2-and-60-day-old-rats-neurotoxicity-and-neurocognitive-dysfunction
#3
He Huang, Cun-Ming Liu, Jie Sun, Wen-Jie Jin, Yu-Qing Wu, Jing Chen
BACKGROUND: Sevoflurane is one of the most widely used inhalation anesthetics in pediatric anesthesia. A large number of studies have demonstrated that repeated treatment with high concentrations or long durations of sevoflurane anesthesia during the neonatal period can induce neuroapoptosis and long-term learning disability. In clinical practice, we observed that a subset of patients underwent minor surgery under sevoflurane anesthesia more than once from birth to adolescence. Therefore, this research was conducted to investigate whether a 2% concentration of sevoflurane (clinically relevant usage of sevoflurane) for 1 h (a short duration) can induce neuroapoptosis and neurocognitive dysfunction in adolescent rats that received sevoflurane (2% for 1 h) during the neonatal period...
September 15, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/28913499/perioperative-hyperoxia-perhaps-a-malady-in-disguise
#4
REVIEW
Yalim Dikmen, Aybike Onur
Oxygen is an element, which is used liberally during several medical procedures. The use of oxygen during perioperative care is a controversial issue. Anesthesiologists use oxygen to prevent hypoxemia during surgical procedures, but the effects of its liberal use can be harmful. Another argument for using high oxygen concentrations is to prevent surgical site infections by increasing oxygen levels at the incision site. Although inconclusive, literature concerning the use of high oxygen concentrations during anesthesia show that this approach may cause hemodynamic changes, altered microcirculation and increased oxidative stress...
April 2017: Rom J Anaesth Intensive Care
https://www.readbyqxmd.com/read/28836009/contralateral-cerebral-hemoglobin-oxygen-saturation-changes-in-patients-undergoing-thoracotomy-with-general-anesthesia-with-or-without-paravertebral-block-a-randomized-controlled-trial
#5
Keika Mukaihara, Maiko Hasegawa-Moriyama, Yuichi Kanmura
PURPOSE: Perioperative analgesia during thoracotomy is often achieved by combining paravertebral block (PVB) with general anesthesia (GA). Functional near-infrared spectroscopy (NIRS) can detect changes in cerebral oxygenation resulting from nociceptive stimuli in the awake state or under sedation. We used NIRS to measure changes in cerebral blood flow provoked by thoracotomy incision made under GA and determine how these changes were influenced by supplementation of GA with PVB. METHODS: Thirty-four patients undergoing elective thoracotomy were enrolled...
August 23, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28832896/end-tidal-control-vs-manually-controlled-minimal-flow-anesthesia-a-prospective-comparative-trial
#6
A J Wetz, M M Mueller, K Walliser, C Foest, S Wand, I F Brandes, R M Waeschle, M Bauer
BACKGROUND: To ensure safe general anesthesia, manually controlled anesthesia requires constant monitoring and numerous manual adjustments of the gas dosage, especially for low- and minimal-flow anesthesia. Oxygen flow-rate and administration of volatile anesthetics can also be controlled automatically by anesthesia machines using the end-tidal control technique, which ensures constant end-tidal concentrations of oxygen and anesthetic gas via feedback and continuous adjustment mechanisms...
August 22, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28620251/physiological-alteration-quality-of-anesthesia-and-economy-of-isoflurane-in-domestic-chickens-gallus-domesticus
#7
Parag Deori, Kushal Konwar Sarma, Parsha Jyoti Nath, Chandan Kumar Singh, Rita Nath
AIM: Aim of the study was to evaluate the effect of isoflurane anesthesia on physiological parameters, assessment of anesthetic qualities, and economy of use of isoflurane in domestic chickens (Gallus domesticus). MATERIALS AND METHODS: In this study, 18 apparently healthy adult domestic chickens were selected randomly and divided into three groups. The birds were anesthetized by masked induction with isoflurane at a dose rate of 3.5%, 4%, and 5% and were maintained with 1...
May 2017: Veterinary World
https://www.readbyqxmd.com/read/28614132/the-effect-of-chronic-opioid-use-on-end-tidal-concentration-of-sevoflurane-necessary-to-maintain-a-bispectral-index-below-50-a-prospective-single-blind-study
#8
COMPARATIVE STUDY
Tak Kyu Oh, Woosik Eom, Jiyeon Yim, Namwoo Kim, Kyungho Kwon, Seong-Eun Kim, Dae Hyun Kim
BACKGROUND: Opioid analgesics decrease the minimum alveolar concentration of inhalation agents during the acute phase response. However, the effect of chronic opioid exposure on minimum alveolar concentration of inhalation agents remains unknown. This study aimed to determine the concentration of sevoflurane necessary to maintain a bispectral index (BIS) <50 (SEVOBIS50) in patients with chronic opioid use compared with those naïve to opioid use. METHODS: We included chronic opioid users who received a stable dose of oral morphine of at least 60 mg/d according to the morphine equivalent daily dose for at least 4 weeks and opioid-naïve patients...
July 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28599888/cardiopulmonary-effects-of-pleural-insufflation-with-co2-during-two-lung-ventilation-in-dorsally-recumbent-anesthetized-horses
#9
Kaylee S Bohaychuk-Preuss, M Valentina Carrozzo, Tanya Duke-Novakovski
OBJECTIVE: To record the cardiopulmonary effects of pleural CO2 positive pressure insufflation in anesthetized horses. STUDY DESIGN: Prospective study. ANIMALS: Seven horses (mean ± standard deviation, 530.9 ± 68.1 kg) undergoing terminal surgery. METHODS: Horses were sedated with xylazine. Anesthesia was induced with ketamine-propofol and maintained with isoflurane, positive pressure ventilation, detomidine infusion, and butorphanol with the horses in dorsal recumbency...
January 10, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28506542/coronary-sinus-isoflurane-concentration-in-cardiac-surgery
#10
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/28484741/effects-of-clove-oil-and-lidocaine-hcl-anesthesia-on-water-parameter-during-simulated-transportation-in-the-marine-medaka-oryzias-dancena
#11
In-Seok Park, Hyun Woo Gil, Tae Ho Lee, Yoon Kwon Nam, Sang Gu Lim, Dong Soo Kim
Optimum concentrations of anesthetic clove oil and anesthetic lidocaine-HCl were determined for a species of adult marine medaka, Oryzias dancena, over a range of salinity conditions, and investigated in a transport simulation experiment by analyzing various water and physiological parameters. Research indicated that the higher the concentration of anesthetic at each salinity, the shorter the anesthesia time at each salinity. At each concentration, fish were anesthetized slower at water salinities over 10 ppt (P<0...
March 2017: Balsaeng'gwa Saengsig
https://www.readbyqxmd.com/read/28467526/centers-for-disease-control-and-prevention-guideline-for-the-prevention-of-surgical-site-infection-2017
#12
Sandra I Berríos-Torres, Craig A Umscheid, Dale W Bratzler, Brian Leas, Erin C Stone, Rachel R Kelz, Caroline E Reinke, Sherry Morgan, Joseph S Solomkin, John E Mazuski, E Patchen Dellinger, Kamal M F Itani, Elie F Berbari, John Segreti, Javad Parvizi, Joan Blanchard, George Allen, Jan A J W Kluytmans, Rodney Donlan, William P Schecter
Importance: The human and financial costs of treating surgical site infections (SSIs) are increasing. The number of surgical procedures performed in the United States continues to rise, and surgical patients are initially seen with increasingly complex comorbidities. It is estimated that approximately half of SSIs are deemed preventable using evidence-based strategies. Objective: To provide new and updated evidence-based recommendations for the prevention of SSI...
August 1, 2017: JAMA Surgery
https://www.readbyqxmd.com/read/28441420/mapping-of-the-brain-hemodynamic-responses-to-sensorimotor-stimulation-in-a-rodent-model-a-bold-fmri-study
#13
Salem Boussida, Amidou S Traoré, Franck Durif
Blood Oxygenation Level Dependent functional MRI (BOLD fMRI) during electrical paw stimulation has been widely used in studies aimed at the understanding of the somatosensory network in rats. However, despite the well-established anatomical connections between cortical and subcortical structures of the sensorimotor system, most of these functional studies have been concentrated on the cortical effects of sensory electrical stimulation. BOLD fMRI study of the integration of a sensorimotor input across the sensorimotor network requires an appropriate methodology to elicit functional activation in cortical and subcortical areas owing to the regional differences in both neuronal and vascular architectures between these brain regions...
2017: PloS One
https://www.readbyqxmd.com/read/28231032/effects-of-live-trapping-and-isoflurane-anesthesia-on-free-ranging-american-martens-martes-americana
#14
Maria C Spriggs, Lisa I Muller, Paul Keenlance, Robert L Sanders, Jill C Witt, Debra L Miller
Seventy-two free-ranging American martens ( Martes americana ) in Michigan, US were immobilized using isoflurane from 2011 to 2015. In total, 129 anesthetic procedures were performed with no mortalities. Hypothermia and hyperthermia were the most common anesthetic complications, and the mean rectal temperatures were significantly higher during summer than in winter. Dental abnormalities were common; the majority of abnormal findings were broken or discolored teeth attributed to previous dental trauma and were not trap-induced...
July 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28214930/investigation-of-optical-neuro-monitoring-technique-for-detection-of-maintenance-and-emergence-states-during-general-anesthesia
#15
Gabriela Hernandez-Meza, Meltem Izzetoglu, Mary Osbakken, Michael Green, Hawa Abubakar, Kurtulus Izzetoglu
The American Society of Anesthesiologist recommends peripheral physiological monitoring during general anesthesia, which offers no information regarding the effects of anesthetics on the brain. Since no "gold standard" method exists for this evaluation, such a technique is needed to ensure patient comfort, procedure quality and safety. In this study we investigated functional near infrared spectroscopy (fNIRS) as possible monitor of anesthetic effects on the prefrontal cortex. Anesthetic drugs, such as sevoflurane, suppress the cerebral metabolism and alter the cerebral blood flow...
February 18, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28178175/the-effect-of-nicardipine-on-the-surgical-pleth-index-during-thyroidectomy-under-general-anesthesia-a-prospective-double-blind-randomized-controlled-trial
#16
RANDOMIZED CONTROLLED TRIAL
Young Ju Won, Byung Gun Lim, Gwi Eun Yeo, Min Ki Lee, Dong Kyu Lee, Heezoo Kim, Il Ok Lee, Myoung Hoon Kong
BACKGROUND: The effectiveness of surgical pleth index (SPI) for managing nociception-antinociception balance during general anesthesia with vasodilators, including nicardipine has not been demonstrated. We aimed to compare the time course during surgery in SPI values in patients receiving nicardipine or remifentanil infusion during thyroidectomy. METHODS: Forty patients undergoing thyroidectomy were randomly assigned to receive nicardipine (group N; n = 19) or remifentanil (group R; n = 21) along with induction (propofol, fentanyl, and rocuronium) and maintenance (50% desflurane/nitrous oxide in oxygen) anesthesia (goal bispectral index [BIS] ∼50)...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28177176/electroencephalographic-discontinuity-during-sevoflurane-anesthesia-in-infants-and-children
#17
Laura Cornelissen, Ann M Bergin, Kimberly Lobo, Carolina Donado, Janet S Soul, Charles B Berde
BACKGROUND: Deep anesthesia in adults may be associated with electroencephalographic (EEG) suppression and higher rates of postoperative complications. Little is known about the impact of anesthetic depth on short- or long-term outcomes in pediatrics. Brain activity monitoring may complement clinical signs of anesthetic depth. This prospective observational study aimed to assess the frequency and degree of profound EEG suppression using multichannel EEG in children during sevoflurane general anesthesia...
February 8, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28099321/preoxygenation-physiologic-basis-benefits-and-potential-risks
#18
REVIEW
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/28051988/ultraportable-oxygen-concentrator-use-in-u-s-army-special-operations-forward-area-surgery-a-proof-of-concept-in-multiple-environments
#19
Michael Rybak, Lynn C Huffman, Richard Nahouraii, John Loden, Marcos Gonzalez, Ramey Wilson, Paul D Danielson
INTRODUCTION: A limitation to surgical care in an austere environment is the supply of oxygen to support mechanical ventilation and general anesthesia. Portable oxygen concentrators (OCs) offer an alternative to traditional compressed oxygen tanks. OBJECTIVES: We set out to demonstrate that a low-pressure OC system could supply the mechanical ventilation needs in an austere operating environment. METHODS: An ultraportable OC (SAROS Model 3000, SeQual Technologies, Ball Ground, Georgia) was paired with an Impact 754 ventilator (Impact Instrumentation, West Caldwell, New Jersey) to evaluate the delivered fraction of inspired oxygen (FiO2) to a test lung across a range of minute ventilations and at altitudes of 1,200 and 6,500 feet above sea level...
January 2017: Military Medicine
https://www.readbyqxmd.com/read/28006942/propofol-induced-mitochondrial-and-contractile-dysfunction-of-the-rat-ventricular-myocardium
#20
M Grundmanová, D Jarkovská, A Süß, Z Tůma, M Marková, Z Grundman, A El-Kadi, M Čedíková, M Štengl, J Kuncová
Propofol is a short-acting hypnotic agent used in human medicine for sedation and general anesthesia. Its administration can be associated with serious cardiovascular side-effects that include decrease in arterial blood pressure and cardiac output. The aim of the present study was to evaluate propofol effects on mitochondrial respiration, myocardial contractility and electrophysiology in the same samples isolated from the heart ventricles of adult rats. Mitochondrial oxygen consumption was measured in permeabilized samples dissected from free walls of both ventricles using high-resolution respirometry...
December 22, 2016: Physiological Research
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