Skip to main content
Fig. 3 | Annals of Intensive Care

Fig. 3

From: Accuracy of delivered airway pressure and work of breathing estimation during proportional assist ventilation: a bench study

Fig. 3

Percentage of difference between measured airway pressure (\(P_{{{\text{aw}}_{\text{meas}} }}\)) and theoretical airway pressure (\(P_{{{\text{aw}}_{\text{th}} }}\)) (%ΔP aw) at 25, 50, 75 and 100 % of inspiration with different respiratory rates in obstructive respiratory mechanics (a). Difference between \(P_{{{\text{aw}}_{\text{meas}} }}\) and \(P_{{{\text{aw}}_{\text{th}} }}\) is expressed in percentage of \(P_{{{\text{aw}}_{\text{th}} }}\)(% ΔP aw = (\(P_{{{\text{aw}}_{\text{meas}} }}\) − \(P_{{{\text{aw}}_{\text{th}} }}\))/\(P_{{{\text{aw}}_{\text{th}} }}\) × 100). Representative tracing of \(P_{{{\text{aw}}_{\text{th}} }}\) and \(P_{{{\text{aw}}_{\text{meas}} }}\) (b). Black lines \(P_{{{\text{aw}}_{\text{th}} }}\) waveforms. Blue lines \(P_{{{\text{aw}}_{\text{meas}} }}\) waveforms. Resistance = 20 cmH2O/L/s; compliance = 60 mL/cmH2O; gain = 60 %; inspiratory trigger = 5 L/min; PEEP = 0 cmH2O; and P mus = 10 cmH2O

Back to article page