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Early detection of 'rebreathing' in afferent and efferent reservoir breathing systems using capnography

dc.contributor.authorMiller D.M.
dc.date.accessioned2011-05-15T16:15:46Z
dc.date.available2011-05-15T16:15:46Z
dc.date.issued1990
dc.identifier.citationBritish Journal of Anaesthesia
dc.identifier.citation64
dc.identifier.citation2
dc.identifier.issn00070912
dc.identifier.urihttp://hdl.handle.net/10019.1/13477
dc.description.abstractCapnography was used to determine the onset of rebreathing in afferent (AR) and efferent (ER) reservoir breathing systems in a spontaneous ventilation lung model. In the case of the Lack and enclosed AR systems, the best sampling site was found to be in the exhaust limb of the systems, 5 cm from the Y connector. For the Magill system, fitted with a hooded scavenging valve, the best site was deep inside the hooded valve. In contrast, the best sampling site in an ER system (e.g. Bain system) was in the tracheal tube. For AR systems, the loss of a fresh gas elimination pattern (carbon dioxide trace failing to reach zero) was shown to occur at the onset of rebreathing. As the sampling site was moved distally into the exhaust limb, the same pattern was seen at greater flow rates - that is, before rebreathing was actually occurring. When sampling was within the tracheal tube, using ER systems, a typical 'rebreathing wave' occurred at the onset of established rebreathing.
dc.subjectarticle
dc.subjectbreathing
dc.subjectcapnography
dc.subjectmonitoring
dc.subjectnonhuman
dc.subjectpriority journal
dc.subjecttheoretical study
dc.subjectAnesthesia, Inhalation
dc.subjectCarbon Dioxide
dc.subjectLung
dc.subjectModels, Structural
dc.subjectPulmonary Alveoli
dc.subjectRespiration
dc.subjectSupport, Non-U.S. Gov't
dc.subjectTime Factors
dc.subjectVentilators, Mechanical
dc.titleEarly detection of 'rebreathing' in afferent and efferent reservoir breathing systems using capnography
dc.typeArticle
dc.description.versionArticle


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