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Annals of Intensive Care

Table 3 Comparison of sleep quality between the ventilatory modes

From: Sleep quality in mechanically ventilated patients: comparison between NAVA and PSV modes

 

PSV

NAVA

p

Stage 1, %

7.5 [4-15]

4 [3-5]

0.006*

Stage 2, %

68 [66-75]

55 [52-58]

0.001*

Stage 3 and 4, %

16.5 [17-20]

20.5 [16-25]

0.001*

REM, %

4.5 [3-11]

16.5 [13-29]

0.001*

Fragmentation index, (n/h)

33.5 [25-54]

17.5 [8-21.5]

0.001*

Sleep efficacy, %

44 [29-73.5]

73.5 [52.5-77]

0.001*

  1. PSV = pressure support ventilation; NAVA = neurally adjusted ventilatory assist; REM = rapid eye movement; Fragmentation Index = number of arousals and awakenings per hour of sleep; Sleep efficiency = duration of sleep/total duration of recording.
  2. Values are expressed as median [interquartile range].
  3. *p < 0.05.
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