Abstract
Objective. The new generations of intensive care ventilators tend to be more innovative and sophisticated than previous ones, but little is known about their respective performance for delivering pressure support ventilation (PSV) and how they compare to previous generations.
Design. Active lung model bench test.
Apparatus. Twenty-two commercially available ventilators classified into three categories: new generation ventilators (after 1993, n=7), previous generation (before 1993, n=6), and recent piston or turbine-based ventilators (n=9).
Measurements and results. During PSV, the unloading efficacy of the assistance depends on the ventilator's ability to meet inspiratory flow demand. Three levels of flow (0.1 l/s, 0.6 l/s, and 1.2 l/s) were used to simulate inspiratory demand and the net area of the inspiratory airway pressure-time trace was calculated over the first 0.3 s, 0.5 s, and 1 s (Area 0.3 , Area 0.5 , and Area tot ) with three levels of PSV (5 cmH2O, 10 cmH2O, and 15 cmH2O). To assess the respective role of pressure support delivery and triggering function, triggering sensitivity was assessed independently by measuring the time delay (TD tg ) and the pressure fall (Δ Paw tg ) with two levels of inspiratory drive. All the new generation ventilators exhibited significantly better results than most of the previous generation ventilators regarding Area 0.3 and TD tg , indicating large improvements in terms of triggering and pressurisation.
Conclusion. Regarding PSV and trigger performance, the new generation ventilators – but also some piston and turbine-based ventilators – outperform most of previous generation ventilators.
Article PDF
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Electronic Publication
Rights and permissions
About this article
Cite this article
Richard, JC., Carlucci, A., Breton, L. et al. Bench testing of pressure support ventilation with three different generations of ventilators. Intensive Care Med 28, 1049–1057 (2002). https://doi.org/10.1007/s00134-002-1311-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00134-002-1311-9