Pressure vs flow triggering during pressure support ventilation

Chest
R GouletRobert M Kacmarek

Abstract

Adult mechanical ventilators have traditionally been pressure- or time-triggered. More recently, flow triggering has become available and some adult ventilators allow the choice between pressure or flow triggering. Prior studies have supported the superiority of flow triggering during continuous positive airway pressure, but few have compared pressure and flow triggering during pressure support ventilation (PSV). The purpose of this study was to compare pressure and flow triggering during PSV in adult mechanically ventilated patients. The study population consisted of 10 adult patients ventilated with a mechanical ventilator (Nellcor-Puritan-Bennett 7200ae) in the PSV mode. In random order, we compared pressure triggering of -0.5 H2O, pressure triggering -1 cm H2O, flow triggering of 5/2 L/min, and flow triggering 10/3 L/min. Pressure was measured for 5 min at the proximal endotracheal tube using a data acquisition rate of 100 Hz. From the airway pressure signal, trigger pressure (deltaP) was defined as the difference between positive end-expiratory pressure (PEEP) and the maximum negative deflection prior to onset of the triggered breath. Pressure-time product (PTP) was defined as the area produced by the pressure waveform bel...Continue Reading

References

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Citations

Jun 25, 2004·Pediatric Critical Care Medicine : a Journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies·Ravi R ThiagarajanLynn D Martin
Jan 28, 1998·American Journal of Respiratory and Critical Care Medicine·P AslanianL Brochard
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Aug 5, 2004·Critical Care Nursing Quarterly·Denise Fenstermacher, Dennis Hong
Nov 1, 2017·Korean Journal of Critical Care Medicine·Elvira-Markela AntonogiannakiEvangelia Akoumianaki

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