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Table 3 Change of respiratory and hemodynamics parameters at different flow rates

From: Effect of postextubation high-flow nasal cannula therapy on lung recruitment and overdistension in high-risk patient

Variables

0 L/min

20 L/min

40 L/min

60 L/min

Trend–p

Mauchly’s test of sphericity p value

SPO2 (%)

97 ± 2

98 ± 2

98 ± 2

98 ± 2

0.029*

0.326

RR (bpm)

22 ± 6

20 ± 4

20 ± 3

21 ± 5

0.144

0.060

ROX index

22.41 ± 5.38

23.88 ± 5.20

23.54 ± 4.35

22.20 ± 4.34

0.120

0.598

Inspiration time(s)

1.48 ± 0.34

1.61 ± 0.56

1.54 ± 0.40

1.55 ± 0.42

0.345

0.891

Expiration time (s)

1.72 ± 0.59

1.71 ± 0.48

1.72 ± 0.46

1.78 ± 0.65

0.967

0.755

MAP (mmHg)

86 ± 10

86 ± 10

87 ± 8

87 ± 8

0.358

0.147

HR (bpm)

90 ± 14

89 ± 13

89 ± 14

88 ± 13

0.338

0.000

PI

1.9 ± 1.2

2.0 ± 1.2

1.6 ± 1.0

1.9 ± 1.1

0.635

0.000

  1. SPO2 peripheral oxygen saturation, RR respiratory rate, HR heart rate, MAP mean arterial pressure, PI peripheral perfusion index
  2. ROX index = (Respiratory rate-OXygenation) index = the ratio of SpO2/FiO2 to RR
  3. p value by one-way analysis of variance (ANOVA) for repeated measures
  4. *p < 0.05
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Critical Care

ISSN: 1364-8535