Erschienen in:
01.01.2005 | Year in Review 2004
Year in review in intensive care medicine, 2004. I. Respiratory failure, infection, and sepsis
verfasst von:
Peter Andrews, Elie Azoulay, Massimo Antonelli, Laurent Brochard, Christian Brun-Buisson, Geoffrey Dobb, Jean-Yves Fagon, Herwig Gerlach, Johan Groeneveld, Jordi Mancebo, Philipp Metnitz, Stefano Nava, Jerome Pugin, Michael Pinsky, Peter Radermacher, Christian Richard, Robert Tasker, Benoit Vallet
Erschienen in:
Intensive Care Medicine
|
Ausgabe 1/2005
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Excerpt
Measurement of lung volume has always been a concern in patients receiving mechanical ventilation (MV), and complex methods have been proposed for clinical investigation. Patroniti et al. [
1] described a simplified helium dilution technique to measure end-expiratory lung volume and compared it to computed tomography (CT) in 21 MV patients. The authors specifically studied the accuracy and precision of the method. A simple rebreathing gas was used to deliver at least ten usual tidal volumes. The agreement between the two methods was found very acceptable for clinical purposes. It was noted, however, that the higher the amount of hyperinflated tissue, the greater was the underestimation of lung volume by the helium dilution method. It has been well demonstrated that a frequent cause of repeated lung volume loss is endotracheal suctioning. This can induce derecruitment in patients with acute respiratory distress syndrome (ARDS). The effects of such maneuver were tested in ten patients with only mild to moderate lung failure by Fernandez et al. [
2]. Three techniques were compared with or without preoxygenation. The authors found that reduction in lung volume during suctioning was similar with the quasiclosed and closed systems but significantly higher with the open system. They also observed that in these patients without severe lung disease these changes were transient and rapidly reversible within 10 min. …