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Table 2 The changes of respiratory parameters in six eligible patients before and after NPPV application

From: Evaluation of noninvasive positive pressure ventilation after extubation from moderate positive end-expiratory pressure level in patients undergoing cardiovascular surgery: a prospective observational study

No.

P/F ratio (mmHg)

RR ( /min)

PaCO2(mmHg)

Before

After

Before

After

Before

After

1

201.2

287.4

15

12

32.6

33.0

2

248.3

280.4

13

11

33.3

36.5

3

246.4

298.2

16

14

36.7

28.9

4

351.2

458.4

31

25

34.1

34.7

5

206.6

228.6

18

20

41.3

40.6

6

219.2

398

16

20

25.8

25.7

mean ± SD

245 ± 55

325 ± 85*

18.2 ± 6.5

17.0 ± 5.5

34.0 ± 5.1

33.2 ± 5.3

  1. *p < 0.05 compared with before. P/F ratio, partial pressure of arterial oxygen tension to inspiratory oxygen fraction ratio; RR, respiratory ratio; PaCO2, partial pressure of arterial carbon dioxide.
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Journal of Intensive Care

ISSN: 2052-0492