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 cmH 2O, 10 cmH 2O, and 15 cmH 2O). 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 (ΔPaw 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1049-1057 |
| Number of pages | 9 |
| Journal | Intensive Care Medicine |
| Volume | 28 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2002 |
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Keywords
- Demand-valve
- Pressure support ventilation
- Trigger
- Work of breathing
ASJC Scopus subject areas
- Critical Care and Intensive Care Medicine
Cite this
Bench testing of pressure support ventilation with three different generations of ventilators. / Richard, J. C.; Carlucci, A.; Breton, L.; Langlais, N.; Jaber, S.; Maggiore, S.; Fougère, S.; Harf, A.; Brochard, L.
In: Intensive Care Medicine, Vol. 28, No. 8, 2002, p. 1049-1057.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Bench testing of pressure support ventilation with three different generations of ventilators
AU - Richard, J. C.
AU - Carlucci, A.
AU - Breton, L.
AU - Langlais, N.
AU - Jaber, S.
AU - Maggiore, S.
AU - Fougère, S.
AU - Harf, A.
AU - Brochard, L.
PY - 2002
Y1 - 2002
N2 - 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 cmH 2O, 10 cmH 2O, and 15 cmH 2O). 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 (ΔPaw 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.
AB - 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 cmH 2O, 10 cmH 2O, and 15 cmH 2O). 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 (ΔPaw 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.
KW - Demand-valve
KW - Pressure support ventilation
KW - Trigger
KW - Work of breathing
UR - http://www.scopus.com/inward/record.url?scp=0036360893&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036360893&partnerID=8YFLogxK
U2 - 10.1007/s00134-002-1311-9
DO - 10.1007/s00134-002-1311-9
M3 - Article
C2 - 12185424
AN - SCOPUS:0036360893
VL - 28
SP - 1049
EP - 1057
JO - Intensive Care Medicine
JF - Intensive Care Medicine
SN - 0342-4642
IS - 8
ER -