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dc.contributor.authorAl-Majed, Sami I.
dc.contributor.authorThompson, John E.
dc.contributor.authorWatson, Kenneth F.
dc.contributor.authorRandolph, Adrienne G.
dc.date.accessioned2011-07-26T02:13:06Z
dc.date.issued2004
dc.identifier.citationAl-Majed, Sami I, John E Thompson, Kenneth F Watson, and Adrienne G Randolph. 2004. Effect of lung compliance and endotracheal tube leakage on measurement of tidal volume. Critical Care 8(6): R398-R402.en_US
dc.identifier.issn1364-8535en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:5030329
dc.description.abstractIntroduction: The objective of this laboratory study was to measure the effect of decreased lung compliance and endotracheal tube (ETT) leakage on measured exhaled tidal volume at the airway and at the ventilator, in a research study with a test lung. Methods: The subjects were infant, adult and pediatric test lungs. In the test lung model, lung compliances were set to normal and to levels seen in acute respiratory distress syndrome. Set tidal volume was 6 ml/kg across a range of simulated weights and ETT sizes. Data were recorded from both the ventilator light-emitting diode display and the CO2SMO Plus monitor display by a single observer. Effective tidal volume was calculated from a standard equation. Results: In all test lung models, exhaled tidal volume measured at the airway decreased markedly with decreasing lung compliance, but measurement at the ventilator showed minimal change. In the absence of a simulated ETT leak, calculation of the effective tidal volume led to measurements very similar to exhaled tidal volume measured at the ETT. With a simulated ETT tube leak, the effective tidal volume markedly overestimated tidal volume measured at the airway. Conclusion: Previous investigators have emphasized the need to measure tidal volume at the ETT for all children. When ETT leakage is minimal, it seems from our simulated lung models that calculation of effective tidal volume would give similar readings to tidal volume measured at the airway, even in small patients. Future studies of tidal volume measurement accuracy in mechanically ventilated children should control for the degree of ETT leakage.en_US
dc.language.isoen_USen_US
dc.publisherBioMed Centralen_US
dc.relation.isversionofdoi://10.1186/cc2954en_US
dc.relation.hasversionhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC1065056/pdf/en_US
dash.licenseLAA
dc.subjectintensive careen_US
dc.subjectlung complianceen_US
dc.subjectmechanical ventilationen_US
dc.subjectmonitoring tidal volumeen_US
dc.titleEffect of lung compliance and endotracheal tube leakage on measurement of tidal volumeen_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalCritical Careen_US
dash.depositing.authorRandolph, Adrienne G.
dc.date.available2011-07-26T02:13:06Z
dash.affiliation.otherHMS^Anaesthesia-Children's Hospitalen_US
dc.identifier.doi10.1186/cc2954*
dash.contributor.affiliatedThompson, John E.
dash.contributor.affiliatedRandolph, Adrienne


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