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Table 4 Coefficient of variability of the main breathing pattern parameters

From: Impact of prolonged assisted ventilation on diaphragmatic efficiency: NAVA versus PSV

 

PSV group

NAVA group

P value

ΔPAO CV (%)

0.88 (0.59–1.22)

9.32 (5.02–11.2)

0.007

VT CV (%)

7.94 (6.44–9.04)

12.83 (10.72–15.45)

0.003

RR CV (%)

10.43 (8.53–13.21)

16.31 (13.75–20.12)

0.007

TiMECH CV (%)

8.14 (7.32–8.8)

12.47 (11.45–15.45)

0.0003

TiNEUR CV (%)

11.06 (4.56–11.97)

11.05 (8.05–13.25)

0.46

EAdiPEAK CV (%)

18.37 (7.87–19.56)

16.05 (15.44–20.71)

1.00

  1. CV coefficient of variability, PSV pressure support ventilation, NAVA neurally adjusted ventilator assist, ΔP AO assistance level (peak airway pressure – positive end-expiratory airway pressure), VT tidal volume, Ti MECH mechanical inspiratory time, Ti NEUR neural inspiratory time, EAdi PEAK peak diaphragm electrical activity