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https://www.readbyqxmd.com/read/27833505/another-utility-of-signature-capnogram-detection-of-sodalime-canister-detachment-from-anesthesia-machine
#1
Sanjay Kumar, Manjaree Mishra, Amrita Bhattacharyya
No abstract text is available yet for this article.
October 2016: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/27334997/the-duration-of-two-carbon-dioxide-absorbents-in-a-closed-circuit-rebreather-diving-system
#2
COMPARATIVE STUDY
David Harvey, Neal W Pollock, Nicholas Gant, Jason Hart, Peter Mesley, Simon J Mitchell
INTRODUCTION: Diving rebreathers use canisters containing sodalime preparations to remove carbon dioxide (CO₂) from the expired gas. These preparations have a limited absorptive capacity and therefore may limit dive duration. The Inspiration™ rebreather is designed for use with Sofnolime 797™ but some divers use Spherasorb™ as an alternative. There are no published data comparing the CO2-absorbing efficacy of these sodalime preparations in an Inspiration rebreather. METHODS: An Inspiration rebreather was operated in a benchtop circuit under conditions simulating work at 6 metabolic equivalents (MET)...
June 2016: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/25460401/evaluating-morphology-and-mechanical-properties-of-glass-reinforced-natural-hydroxyapatite-composites
#3
Z Yazdanpanah, M E Bahrololoom, B Hashemi
Hydroxyapatite has been used in a wide variety of biomedical applications and it can be produced from natural resources such as bovine bone. This material does not have acceptable mechanical properties by itself. In the present work, hydroxyapatite composites with different weight percentages of sodalime glass were made and sintered at different temperatures (800-1200°C). Eventually the properties such as density, micro hardness, compressive strength and wear of specimens were evaluated. Specific percentages of glass additive increased the density and hardness of specimens due to increasing the sintering temperature...
January 2015: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/24245329/effects-of-the-duty-ratio-on-the-niobium-oxide-film-deposited-by-pulsed-dc-magnetron-sputtering-methods
#4
Ji Mi Eom, Hyun Gon Oh, Il Hwan Cho, Sang Jik Kwon, Eou Sik Cho
Niobium oxide (Nb2O5) films were deposited on p-type Si wafers and sodalime glasses at a room temperature using in-line pulsed-DC magnetron sputtering system with various duty ratios. The different duty ratio was obtained by varying the reverse voltage time of pulsed DC power from 0.5 to 2.0 micros at the fixed frequency of 200 kHz. From the structural and optical characteristics of the sputtered NbOx films, it was possible to obtain more uniform and coherent NbOx films in case of the higher reverse voltage time as a result of the cleaning effect on the Nb2O5 target surface...
November 2013: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/23882773/investigation-on-properties-of-electron-beam-treated-mo-back-contact-layer-prepared-by-dc-sputtering-method
#5
Chae-Woong Kim, Chaehwan Jeong
Molybdenum (Mo) has been used as back contact layer in chalcopyrite solar cells family (CulnSe2 and its alloys) because it showed the excellence of electrical properties such as low resistivity at the Mo interference. Generally, there are strong corrleations between working pressure and properites such as adhesion and conductivity during deposition of Mo layer. Electrical properites might be inversely proportional to adehsion between Mo layer and glass substrate. Several methods have been executed for improvement of electrical properties and ahesion...
August 2013: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/21542967/degradation-products-of-different-water-content-sevoflurane-in-carbon-dioxide-absorbents-by-gas-chromatography-mass-spectrometry-analysis
#6
Yue Li, Yi-Cong Li, Yi-Nan Zhang, Shu-Jie Liu, Yan-Mei Zhou, Chang-Song Wang, Yu-Lei Gong, En-You Li
BACKGROUND: Sevoflurane is currently used as a volatile inhalation anesthetic with many clinical advantages. A representative degradation product, compound A, was quantitatively measured to investigate whether there are different reactions between two kinds of water content sevoflurane formulations with different carbon dioxide (CO2) absorbents. METHODS: A closed-circle breathe bag with the Dräger Fabius GS anesthesia apparatus was used as an artificial rubber lung...
April 2011: Chinese Medical Journal
https://www.readbyqxmd.com/read/21446492/high-frequency-characteristics-of-printed-cu-conductive-circuit
#7
Jong-Woong Kim, Young-Chul Lee, Kwang-Seok Kim, Seung-Boo Jung
The effects of sintering temperature on microstructural evolution and electrical characteristics of screen printed Cu patterns were observed. A commercial conducting paste containing Cu nanoparticles was screen printed onto a sodalime wafer sintered under a sintering temperature range of 300 degrees C to 450 degrees C. A network analyzer and Cascade's probe system in the frequency range of 10 MHz to 20 GHz were employed to measure the S-parameters of the sintered Cu conducting patterns. From the measured S-parameters, the insertion losses in high frequencies decreased with increasing sintering temperature due to the formation of an interparticle necking after heat treatment at high temperatures...
January 2011: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/20155306/leak-in-the-breathing-circuit-co2-absorber-and-human-error
#8
Goneppanavar Umesh, Kaur Jasvinder, Roy Sagarnil
A couple of reports in literature have mentioned CO2 absorbers to be the cause for breathing circuit leak during anesthesia. Defective canister, failure to close the absorber chamber and overfilling of the chamber with sodalime were the problems in these reports. Among these, the last two are reports of human error resulting in problems. We report a case where despite taking precautions in this regard, we experienced a significant leak in the system due to a problem with the CO2 absorber, secondary to human error...
April 2010: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/19938735/the-thai-anesthesia-incident-monitoring-study-thai-aims-of-anesthetic-equipment-failure-malfunction-an-analysis-of-1996-incident-reports
#9
MULTICENTER STUDY
Chaiyapruk Kusumaphanyo, Somrat Charuluxananan, Dujduen Sriramatr, Aksorn Pulnitiporn, Wimonrat Sriraj
BACKGROUND: The present study is a part of the multi-centered study of model of anesthesia relating adverse events in Thailand by incident report (The Thai Anesthesia Incident Monitoring Study or Thai AIMS). The objective was to identify the frequency distribution, contributing factors, and factors minimizing incident of equipment failure/malfunction. MATERIAL AND METHOD: As a prospective descriptive research design, anesthesia providers reported the data as soon as the incidents of equipment failure/malfunction occurred...
November 2009: Journal of the Medical Association of Thailand, Chotmaihet Thangphaet
https://www.readbyqxmd.com/read/19516693/micromachining-of-bulk-glass-with-bursts-of-femtosecond-laser-pulses-at-variable-repetition-rates
#10
Rafael R Gattass, Loren R Cerami, Eric Mazur
Oscillator-only femtosecond laser micromachining enables the manufacturing of integrated optical components with circular transverse profiles in transparent materials. The circular profile is due to diffusion of heat accumulating at the focus. We control the heat diffusion by focusing bursts of femtosecond laser pulses at various repetition rates into sodalime glass. We investigate the effect the repetition rate and number of pulses on the size of the resulting structures. We identify the combinations of burst repetition rate and number of pulses within a burst for which accumulation of heat occurs...
June 12, 2006: Optics Express
https://www.readbyqxmd.com/read/17597416/detection-of-carbon-monoxide-production-as-a-result-of-the-interaction-of-five-volatile-anesthetics-and-desiccated-sodalime-with-an-electrochemical-carbon-monoxide-sensor-in-an-anesthetic-circuit-compared-to-gas-chromatography
#11
COMPARATIVE STUDY
Christiaan Keijzer, Roberto S G M Perez, Jaap J de Lange
OBJECTIVES: There is a continuing risk of production of toxic levels of carbon monoxide (CO) as a result of interaction of volatile anesthetics and desiccated strong base carbon dioxide absorbents like soda lime. The aim of this study is to establish the reliability of detection of CO levels by an electrochemical carbon monoxide sensor compared to gas chromatography. METHODS: Completely desiccated sodalime was conducted through a circle anesthesia system connected to an artificial lung...
August 2007: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/17580185/renal-safety-and-extrahepatic-defluorination-of-sevoflurane-in-hepatic-transplantations
#12
M Kanbak, A H Karagoz, N Erdem, B Oc, F Saricaoglu, N Ertas, A Berkkan, O Abbasoglu, U Aypar
BACKGROUND: The main metabolic pathway for defluorination of sevoflurane in the liver produces inorganic fluoride (Fl). The metabolism and effect of sevoflurane on the kidney is not clear during anhepatic phase in liver transplantation. The goal of the present study was to investigate the metabolism and renal effect of sevoflurane by measuring plasma and urine inorganic fluoride, urinary N-acetyl-glucosaminidase (NAG), and plasma creatinine levels in patients undergoing liver transplantations...
June 2007: Transplantation Proceedings
https://www.readbyqxmd.com/read/16390562/partial-liquid-ventilation-effects-of-closed-breathing-systems-heat-and-moisture-exchangers-and-sodalime-absorbers-on-perfluorocarbon-evaporation
#13
C T Wilms, P Schober, R Kalb, S A Loer
BACKGROUND AND OBJECTIVES: During partial liquid ventilation perfluorocarbons are instilled into the airways from where they subsequently evaporate via the bronchial system. This process is influenced by multiple factors, such as the vapour pressure of the perfluorocarbons, the instilled volume, intrapulmonary perfluorocarbon distribution, postural positioning and ventilatory settings. In our study we compared the effects of open and closed breathing systems, a heat-and-moisture-exchanger and a sodalime absorber on perfluorocarbon evaporation during partial liquid ventilation...
January 2006: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/15954965/carbon-monoxide-production-from-desflurane-and-six-types-of-carbon-dioxide-absorbents-in-a-patient-model
#14
COMPARATIVE STUDY
C Keijzer, R S G M Perez, J J de Lange
BACKGROUND: Desflurane is known to produce high concentrations of carbon monoxide (CO) in desiccated sodalime or Baralyme (Allied Healthcare Products, St. Louis, MO). Desiccated absorbents without strong bases like potassium hydroxide or sodium hydroxide are reported to produce less or no CO at all. The purpose of this study is to compare the concentration of CO in an anesthesia circuit for desflurane with six different types of completely desiccated CO(2) absorbents with less strong bases than sodalime...
July 2005: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/15932634/carbon-monoxide-production-from-five-volatile-anesthetics-in-dry-sodalime-in-a-patient-model-halothane-and-sevoflurane-do-produce-carbon-monoxide-temperature-is-a-poor-predictor-of-carbon-monoxide-production
#15
Christiaan Keijzer, Roberto Sgm Perez, Jaap J De Lange
BACKGROUND: Desflurane and enflurane have been reported to produce substantial amounts of carbon monoxide (CO) in desiccated sodalime. Isoflurane is said to produce less CO and sevoflurane and halothane should produce no CO at all.The purpose of this study is to measure the maximum amounts of CO production for all modern volatile anesthetics, with completely dry sodalime. We also tried to establish a relationship between CO production and temperature increase inside the sodalime. METHODS: A patient model was simulated using a circle anesthesia system connected to an artificial lung...
June 2, 2005: BMC Anesthesiology
https://www.readbyqxmd.com/read/15825711/comparison-of-effectiveness-between-gas-flow-1-and-2-l-min-1-for-general-anesthesia-in-infants-and-children
#16
RANDOMIZED CONTROLLED TRIAL
Suwannee Suraseranivongse, Sumitra Chowvanayotin, Sangsom Pirayavaraporn, Songyos Valairucha, Naiyana Arunpruksakul, Somsak Areewatana
OBJECTIVES: To determine 1) Success rate of using fresh gas flow (FGF) 1 l.min(-1) compared to 2 l.min(-1) in pediatric patients 2) Necessity of using anesthetic agent analyzer 3) predicting volatile anesthetic concentration 4) cost difference. METHOD: Seventy-seven patients (age 10 days to 8 years) who underwent general anesthesia were randomly allocated into 2 groups: the control group (FGF 2 l.min(-1)) and the study group (FGF 1 l.min(-1)). Outcome measures included system leakage, SaO2, PECO2, FiO2, Fi and FeN2O, isoflurane dial setting, Fi and Fe isoflurane, isoflurane mass consumed and sodalime used...
November 2004: Journal of the Medical Association of Thailand, Chotmaihet Thangphaet
https://www.readbyqxmd.com/read/11753018/comparison-of-amsorb-sodalime-and-baralyme-degradation-of-volatile-anesthetics-and-formation-of-carbon-monoxide-and-compound-a-in-swine-in-vivo
#17
COMPARATIVE STUDY
Evan D Kharasch, Karen M Powers, Alan A Artru
BACKGROUND: Consequences of volatile anesthetic degradation by carbon dioxide absorbents that contain strong base include formation of compound A from sevoflurane, formation of carbon monoxide (CO) and CO toxicity from desflurane, enflurane and isoflurane, delayed inhalation induction, and increased anesthetic costs. Amsorb (Armstrong Ltd., Coleraine, Northern Ireland) is a new absorbent that does not contain strong base and does not form CO or compound A in vitro. This investigation compared Amsorb, Baralyme (Chemetron Medical Division, Allied Healthcare Products, St...
January 2002: Anesthesiology
https://www.readbyqxmd.com/read/11381692/near-point-source-longitudinal-and-transverse-mode-ultrasonic-arrays-for-material-characterization
#18
M Mah, D R Schmitt
Specially constructed near point-source ultrasonic transducers (0.75 MHz) were designed to preferentially stimulate and receive the one longitudinal (P) and two transverse (S) propagation modes. Arrays of these transducers were placed on a rectangular prism of common sodalime glass, which served as an ideal homogeneous, isotropic medium, to evaluate the uncertainty of a newly developed phase velocity measurement method. Through the use of the Radon transform, the data were transformed from the offset-time (x-t) domain to the intercept time--horizontal slowness (tau-p) domain...
May 2001: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/11020762/in-vitro-compound-a-formation-in-a-computer-controlled-closed-circuit-anesthetic-apparatus-comparison-with-a-classical-valve-circuit
#19
COMPARATIVE STUDY
L F Versichelen, G Rolly, M P Bouche, J F Van Bocxlaer, M M Struys, C Van Der Herten, A P De Leenheer, E P Mortier
BACKGROUND: Few data exist on compound A during sevoflurane anesthesia when using closed-circuit conditions and sodalime with modern computer-controlled liquid injection. METHODS: A PhysioFlex apparatus (Dräger, Lübeck, Germany) was connected to an artificial test lung (inflow approximately 160 ml/min carbon dioxide, outflow approximately 200 ml/min, simulating oxygen consumption). Ventilation was set to obtain an end-tidal carbon dioxide partial pressure (Petco2) approximately 40 mmHg...
October 2000: Anesthesiology
https://www.readbyqxmd.com/read/9451491/-various-reactions-of-sevoflurane-with-the-individual-components-of-soda-lime
#20
H Förster, U H Warnken, F Asskali
The various components of commercial soda lime (sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide) were studied in terms of their reactivity with sevoflurane at its boiling point (59 degrees C). A simple closed system, a reflux cooler, served as a model. Analyses were performed by GC/MS. Besides sevoflurane, we identified four compounds: A, B, C, and D. Free methanol, formaldehyde and formic acid could not be found. Presumably methanol is transferred from an intermediate formalin-semiacetal of the hexafluorisopropanol...
December 1997: Der Anaesthesist
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