Table 3.

Comparison of arterial blood gas data between groups.

	IPPB (n = 17)	IPPB + PEEP (n = 16)	Control (n = 17)
Arterial blood gas (ABG)
pH
Pre	7.42 ± 0.12	7.47 ± 0.03	7.46 ± 0.05
Post	7.43 ± 0.04	7.42 ± 0.05∗	7.40 ± 0.06
PaCO2 (mmHg)
Pre	40.4 ± 7.6	40.9 ± 5.8	38.1 ± 5.4
Post	44.5 ± 10.9	46.1 ± 13.5	40.3 ± 8.1
PaO2 (mmHg)
Pre	98.1 ± 21.9	114.1 ± 30.0	111.0 ± 37.1
Post	122.1 ± 32.4∗	128.8 ± 49.3	106.7 ± 12.3
PaO2/FiO2
Pre	275.6 ± 64.5	335.5 ± 98.6	327.6 ± 122.9
Post	381.2 ± 112.2∗	359.5 ± 124.7	287.4 ± 30.1

IPPB: intermittent positive pressure breathing; PEEP: positive end-expiratory pressure; ABG: arterial blood gas.

All values are expressed as mean ± SD. ^∗Within-group comparison, pre versus post, p < 0.05.