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The assessment of regional lung mechanics with electrical impedance tomography: a pilot study during recruitment manoeuvres

Grant, Caroline A., Fraser, John F., Dunster, Kimble R., & Schibler, Andreas (2008) The assessment of regional lung mechanics with electrical impedance tomography: a pilot study during recruitment manoeuvres. Intensive Care Medicine, 35(1), 166-170.

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Abstract

Objective The purpose of lung recruitment manoeuvres is to open collapsed lung regions, improve gas exchange and optimise regional lung mechanics. This study investigates the efficacy of recruitment manoeuvres for improving regional ventilation distribution as characterised using electrical impedance tomography (EIT). Design, subjects, interventions A ventilated ovine smoke inhalation lung injury model was used. Respiratory mechanics and regional filling capacity of the lung were measured using EIT pre- and post- recruitment and compared to a control group. Measurements EIT, expressed as the time course relation of the regional versus the global impedance change, measured the regional filling capacities of the lung. Main results After smoke inhalation injury, the dependent lung showed a significantly larger area of collapse and a reduced filling capacity compared to the non-dependent lung. After recruitment the ventilated volume increased and the dependent lung showed improved respiratory mechanics, whereas the non-dependent lung was more likely to be hyper-inflated during tidal breathing. Conclusions Lung recruitment manoeuvres have a significant impact on regional lung mechanics and individual measurement of ventilation distribution using EIT may assist to improve ventilatory management. Electronic supplementary material The online version of this article (doi:10.1007/s00134-008-1324-0) contains supplementary material, which is available to authorized users.

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20 citations in Scopus
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17 citations in Web of Science®

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ID Code: 17115
Item Type: Journal Article
Additional Information: For more information, please refer to the journal's website (see hypertext link) or contact the author.
Keywords: Filling characteristics, Respiratory mechanics, Acute lung injury, Acute respiratory distress syndrome, tomography
DOI: 10.1007/s00134-008-1324-0
ISSN: 1432-1238
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Biomechanical Engineering (090302)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2008 Springer
Deposited On: 05 Jan 2009 15:50
Last Modified: 29 Feb 2012 23:47

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