Non-invasive measurement of tidal breathing lung mechanics using expiratory occlusion

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dc.contributor.authorHowe SL
dc.contributor.authorMärz M
dc.contributor.authorKrüger-Ziolek S
dc.contributor.authorLaufer B
dc.contributor.authorPretty C
dc.contributor.authorShaw, Geoff
dc.contributor.authorDesaive T
dc.contributor.authorMöller K
dc.contributor.authorChase, Geoff
dc.date.accessioned2021-06-09T02:06:23Z
dc.date.available2021-06-09T02:06:23Z
dc.date.issued2020en
dc.date.updated2021-04-20T06:26:16Z
dc.description.abstractA great amount of research looks at whether information about lung mechanics can be obtained using spirometry, as these mechanics give clinically useful information about lung condition and disease progression. This study uses a time-varying elastance, single compartment lung model to calculate lung mechanics of 15 tidally breathing healthy subjects. A plethysmograph with a built-in shutter was used to induce an exponentially decaying airflow. Lung elastance and respiratory system resistance were separated from the decay rate of flow caused by the shutter. Occlusion resistance was calculated at shutter closure. To simulate upper airway obstruction, progressively larger resistances were added to the plethysmograph mouthpiece. Decay rates measured ranged from 5-42, with large intra-subject variation associated with muscular breathing effort. Measured lung elastance ranged from 3.9-21.2 cmH2O/L and often remained constant as resistance was increased. Resistance calculated from the decay rate was very small, ranging from 0.15-1.95 cmH2Os/L. The low resistance is due to the airflow measured originating from low resistance areas in the centre of airways. Occlusion resistance measurements were as expected for healthy subjects, and followed the expected resistance trend as resistance was increased.en
dc.identifier.citationHowe SL, März M, Krüger-Ziolek S, Laufer B, Pretty C, Shaw GM, Desaive T, Möller K, Chase JG (2020). Non-invasive measurement of tidal breathing lung mechanics using expiratory occlusion. IFAC-PapersOnLine. 53(2). 16167-16172.en
dc.identifier.doihttp://doi.org/10.1016/j.ifacol.2020.12.606
dc.identifier.issn2405-8963
dc.identifier.urihttps://hdl.handle.net/10092/102000
dc.languageen
dc.language.isoen
dc.publisherElsevier BVen
dc.rightsAll rights reserved unless otherwise stateden
dc.rights.urihttp://hdl.handle.net/10092/17651en
dc.subjectSpirometryen
dc.subjectmathematical modelsen
dc.subjectlungsen
dc.subjectparameter identificationen
dc.subjectrespiratory mechanicsen
dc.subject.anzsrcFields of Research::32 - Biomedical and clinical sciences::3201 - Cardiovascular medicine and haematology::320103 - Respiratory diseasesen
dc.subject.anzsrcFields of Research::40 - Engineering::4003 - Biomedical engineering::400303 - Biomechanical engineeringen
dc.titleNon-invasive measurement of tidal breathing lung mechanics using expiratory occlusionen
dc.typeJournal Articleen
uc.collegeFaculty of Engineering
uc.departmentMechanical Engineering
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