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Bedside estimation of recruitable alveolar collapse and hyperdistension by electrical impedance tomography
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2009 (English)In: Intensive Care Medicine, ISSN 0342-4642, E-ISSN 1432-1238, Vol. 35, no 6, 1132-1137 p.Article in journal (Refereed) Published
Abstract [en]


To present a novel algorithm for estimating recruitable alveolar collapse and hyperdistension based on electrical impedance tomography (EIT) during a decremental positive end-expiratory pressure (PEEP) titration.


Technical note with illustrative case reports.


Respiratory intensive care unit.


Patients with acute respiratory distress syndrome.


Lung recruitment and PEEP titration maneuver.


Simultaneous acquisition of EIT and X-ray computerized tomography (CT) data. We found good agreement (in terms of amount and spatial location) between the collapse estimated by EIT and CT for all levels of PEEP. The optimal PEEP values detected by EIT for patients 1 and 2 (keeping lung collapse <10%) were 19 and 17 cmH2O, respectively. Although pointing to the same non-dependent lung regions, EIT estimates of hyperdistension represent the functional deterioration of lung units, instead of their anatomical changes, and could not be compared directly with static CT estimates for hyperinflation.


We described an EIT-based method for estimating recruitable alveolar collapse at the bedside, pointing out its regional distribution. Additionally, we proposed a measure of lung hyperdistension based on regional lung mechanics.

Place, publisher, year, edition, pages
2009. Vol. 35, no 6, 1132-1137 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-176039DOI: 10.1007/s00134-009-1447-yPubMedID: 19255741OAI: oai:DiVA.org:uu-176039DiVA: diva2:534062
Available from: 2012-06-15 Created: 2012-06-15 Last updated: 2012-06-18Bibliographically approved

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