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Table 2 Respiratory characteristics of patients before spontaneous breathing trial

From: Noninvasive mechanical ventilation may be useful in treating patients who fail weaning from invasive mechanical ventilation: a randomized clinical trial

 

NPPV (n = 28)

IMV (n = 37)

P value

Respiratory rate, rpm

22.3 ± 4.2

21.2 ± 4.9

0.35

Tidal volume, mL

594 ± 0.21

629 ± 0.27

0.58

Peak inspiratory pressure, cm H2O

19.3 ± 4.9

18.6 ± 2.9

0.44

Maximal inspiratory pressure, cm H2O

36.0 ± 11.5

37.0 ± 16.1

0.64

Arterial pH

7.41 ± 0.07

7.41 ± 0.06

0.96

PaCO2, mm Hg

45.1 ± 11.5

40.1 ± 11.1

0.08

PaO2, mm Hg

88.7 ± 23.2

99.7 ± 29.5

0.11

SaO2, percentage

95.8 ± 3.1

96.6 ± 2.5

0.26

  1. Values are mean ± standard deviation. P value indicates comparison between groups using t test. IMV, invasive mechanical ventilation; NPPV, noninvasive mechanical ventilation; PaCO2, arterial partial pressure of carbon dioxide; PaO2, arterial partial pressure of oxygen; rpm, respirations per minute; SaO2, arterial saturation of oxygen.
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Critical Care

ISSN: 1364-8535