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Table 3 Gas distribution in four regions for both NAVA and PSV

From: Effects of neurally adjusted ventilatory assist on air distribution and dead space in patients with acute exacerbation of chronic obstructive pulmonary disease

  50% 100% 150%
PSV NAVA P PSV NAVA P PSV NAVA P
ROI 1 11.98 ± 11.17 11.76 ± 10.65 0.715 12.89 ± 8.79 11.86 ± 8.89 0.057 12.21 ± 8.49 11.11 ± 9.37 0.039a
ROI 2 38.60 ± 17.65 36.36 ± 18.71 0.054 44.26 ± 13.63 39.02 ± 15.07 0.003a 41.94 ± 14.80 37.58 ± 13.87 0.004a
ROI 3 39.79 ± 21.54 41.37 ± 22.41 0.220 35.75 ± 18.50 40.13 ± 19.64 0.014a 37.58 ± 18.82 41.37 ± 18.82 0.18
ROI 4 9.66 ± 8.42 10.98 ± 9.05 0.158 7.53 ± 4.98 9.25 ± 5.54 0.005a 9.10 ± 6.71 10.89 ± 8.06 0.020a
ROI3 + 4 49.46 ± 27.28 52.35 ± 27.97 0.093 43.28 ± 20.22 49.38 ± 22.00 0.007a 46.68 ± 21.94 52.26 ± 22.22 0.004a
  1. NAVA neutrally-adjusted ventilator assist, PSV pressure support ventilation, ROI regions of interest
  2. aSignificantly different versus NAVA