Skip to main content

Table 2 Ratio peak Eadi/Eadimax for the eight different conditions tested

From: Information conveyed by electrical diaphragmatic activity during unstressed, stressed and assisted spontaneous breathing: a physiological study

Parameter

Spontaneous breathing (SB)

Assisted breathing without resistance

Assisted breathing with resistance

Without resistance

With resistance

p values

PS low

PS high

NAVA

p values

PS low

PS high

NAVA

p values

Peak Eadi/Eadi max (%), median [IQR]

16.8 [15.6–27.9]

24.5 [17.5–35.3]

0.03

12.6 [10.7–33.0]

12.9 [9.3–21.1]

18.3 [14.7–27.3]

*p = 0.047 (p < 0.05 between SB and PS high and between NAVA and PS high)

14.9 [13.8–25.6]

22.5 [11.8–30.6]

17.1 [13.6–34.0]

#p = 0.001 (p < 0.05 between SB and PS low, SB and PS high and SB and NAVA)

Minimal peak Eadi/Eadi max (%)

3.5

11.5

5.3

1.4

6.7

5.5

3.9

2.7

Maximal peak Eadi/Eadi max (%)

45.7

47.9

45.8

41.5

36.1

38.7

52.0

51.3

  1. For the multiple comparisons (Friedman analyses), only the subjects for whom all the conditions compared could be recorded were considered. The corresponding median values summarize these patients only
  2. Eadi electrical activity of the diaphragm, Eadimax maximal Eadi amplitude during a voluntary inspiration to total lung capacity, PS pressure support, NAVA neurally adjusted ventilatory assist
  3. * Comparison between spontaneous non-assisted breathing without resistance and assisted breathing without resistance under PS low, PS high and NAVA
  4. #Comparison between spontaneous non-assisted breathing with resistance and assisted breathing with resistance under PS low, PS high and NAVA