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Intensive Care Medicine

Erschienen in:

01.05.2011 | Review

Deadspace ventilation: a waste of breath!

verfasst von: Pratik Sinha, Oliver Flower, Neil Soni

Erschienen in: Intensive Care Medicine | Ausgabe 5/2011

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Abstract

Problems with ventilatory efficiency results in abnormal CO₂ clearance. Measuring deadspace ventilation should be the most reliable method of monitoring ventilatory efficiency in mechanically ventilated patients. Since its first description by Bohr in the late 19th century to the current use of single-breath test for volumetric CO₂, our understanding of the physiological deadspace has vastly improved. Yet indices of oxygenation seem to be the mainstay when instigating or fine-tuning ventilatory strategies. Deadspace and with it ventilatory efficiency has been largely forgotten. Recently though there has been a resurgence of interest in ventilatory efficiency. Several indices have been described that either predict deadspace or track ventilatory efficiency at the bedside. Thus making it more accessible and easy to monitor and study in large groups of patients, factors which have perhaps resulted in its under-utilisation in critical care. This review revisits the physiological concepts and methods of measuring deadspace. Described are the various clinical applications of deadspace measurements in the critically unwell. The potential reasons that have led to the variable being under-used are also examined. Finally we describe the indices currently available to track ventilatory efficiency at the bedside.

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Titel: Deadspace ventilation: a waste of breath!
verfasst von: Pratik Sinha
Oliver Flower
Neil Soni
Publikationsdatum: 01.05.2011
Verlag: Springer-Verlag
Erschienen in: Intensive Care Medicine / Ausgabe 5/2011
Print ISSN: 0342-4642
Elektronische ISSN: 1432-1238
DOI: https://doi.org/10.1007/s00134-011-2194-4

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