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01.08.2010 | Original

Adaptive support ventilation versus conventional ventilation for total ventilatory support in acute respiratory failure

verfasst von: Giorgio A. Iotti, Andrea Polito, Mirko Belliato, Daniela Pasero, Gaetan Beduneau, Marc Wysocki, Josef X. Brunner, Antonio Braschi, Laurent Brochard, Jordi Mancebo, V. Marco Ranieri, Jean-Christophe M. Richard, Arthur S. Slutsky

Erschienen in: Intensive Care Medicine | Ausgabe 8/2010

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Abstract

Objective

To compare the short-term effects of adaptive support ventilation (ASV), an advanced closed-loop mode, with conventional volume or pressure-control ventilation in patients passively ventilated for acute respiratory failure.

Design

Prospective crossover interventional multicenter trial.

Setting

Six European academic intensive care units.

Patients

Eighty-eight patients in three groups: patients with no obvious lung disease (n = 22), restrictive lung disease (n = 36) or obstructive lung disease (n = 30).

Interventions

After measurements on conventional ventilation (CV) as set by the patients’ clinicians, each patient was switched to ASV set to obtain the same minute ventilation as during CV (isoMV condition). If this resulted in a change in PaCO₂, the minute ventilation setting of ASV was readjusted to achieve the same PaCO₂ as in CV (isoCO₂ condition).

Measurements and results

Compared with CV, PaCO₂ during ASV in isoMV condition and minute ventilation during ASV in isoCO₂ condition were slightly lower, with lower inspiratory work/minute performed by the ventilator (p < 0.01). Oxygenation and hemodynamics were unchanged. During ASV, respiratory rate was slightly lower and tidal volume (Vt) slightly greater (p < 0.01), especially in obstructed patients. During ASV there were different ventilatory patterns in the three groups, with lower Vt in patients with restrictive disease and prolonged expiratory time in obstructed patients, thus mimicking the clinicians’ choices for setting CV. In three chronic obstructive pulmonary disease patients the resulting Vt was unacceptably high.

Conclusions

Comparison between ASV and CV resulted either in similarities or in minor differences. Except for excessive Vt in a few obstructed patients, all differences were in favor of ASV.

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Titel: Adaptive support ventilation versus conventional ventilation for total ventilatory support in acute respiratory failure
verfasst von: Giorgio A. Iotti
Andrea Polito
Mirko Belliato
Daniela Pasero
Gaetan Beduneau
Marc Wysocki
Josef X. Brunner
Antonio Braschi
Laurent Brochard
Jordi Mancebo
V. Marco Ranieri
Jean-Christophe M. Richard
Arthur S. Slutsky
Publikationsdatum: 01.08.2010
Verlag: Springer-Verlag
Erschienen in: Intensive Care Medicine / Ausgabe 8/2010
Print ISSN: 0342-4642
Elektronische ISSN: 1432-1238
DOI: https://doi.org/10.1007/s00134-010-1917-2

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Adaptive support ventilation versus conventional ventilation for total ventilatory support in acute respiratory failure