| Evaluation of the PhysioFlex closed-circuit anaesthesia machine. | |
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MedLine Citation:
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PMID: 10928435 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The concentrations of nitrous oxide, sevoflurane and oxygen in the circle system of a closed-circuit anaesthesia machine, the PhysioFlex, were measured in seven patients. During anaesthesia, the settings for each gas were changed and their concentrations recorded. At the induction of anaesthesia, it took 80-510s (median 190s) for the end-tidal sevoflurane concentration to reach 2.0%, and 920-2640s (median 1500s) for the oxygen in the breathing circuit to reach 30%. At this time, the nitrous oxide concentration was 60+/-3% (mean+/-SD). During anaesthesia, it took 90-480s (median 140s) for the end-tidal sevoflurane concentration setting to decrease from 3.0 to 1.0%, and 90-400s (median 110s) to return from 1.0 to 3.0%. When the inspired oxygen was increased from 30 to 50%, circuit concentrations reached equilibrium in 40-60s (median 40s), and when decreased from 50% back to 30%, equilibrium took 310-470s (median 450s). During recovery from anaesthesia, inspiratory sevoflurane concentration took 40-70s (median 50s) to decrease to 0.2%. The PhysioFlex provided adequate control of sevoflurane and oxygen concentrations, but not of increasing nitrous oxide concentrations. |
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Authors:
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A Suzuki; H Bito; Y Sanjo; T Katoh; S Sato |
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Publication Detail:
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Type: Clinical Trial; Evaluation Studies; Journal Article |
Journal Detail:
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Title: European journal of anaesthesiology Volume: 17 ISSN: 0265-0215 ISO Abbreviation: Eur J Anaesthesiol Publication Date: 2000 Jun |
Date Detail:
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Created Date: 2000-11-30 Completed Date: 2000-11-30 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8411711 Medline TA: Eur J Anaesthesiol Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 359-63 Citation Subset: IM |
Affiliation:
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Department of Anesthesiology and Intensive Care, Hamamatsu University School of Medicine, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Anesthesia, Closed-Circuit / instrumentation* Anesthetics, Inhalation Female Humans Male Methyl Ethers Middle Aged Nitrous Oxide Oxygen Inhalation Therapy Respiratory Function Tests |
| Chemical | |
Reg. No./Substance:
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0/Anesthetics, Inhalation; 0/Methyl Ethers; 10024-97-2/Nitrous Oxide; 28523-86-6/sevoflurane |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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