Table 2: Arterial Blood Gas (ABG) values during the treatment progress.

		1st Group	2nd Group	3rd Group	p
Initial	pH	7.27 ± 0.5	7.26 ± 0.3	7.27 ± 0.4	0.74
	PaO2	54 ± 29	49 ± 14	62 ± 37	0.37
	PaCO2	71 ± 19	73 ± 17	71 ± 15	0.93
	HCO3	31 ± 7	30 ± 11	32 ± 6	0.89
1st hour	pH	7.32 ± 0.5	7.32 ± 0.6	7.29 ± 0.3	0.04*
	PaO2	60 ± 21	61 ± 19	62 ± 29	0.44
	PaCO2	62 ± 16	61 ± 12	66 ± 13	0.11
	HCO3	30 ± 7	32 ± 6	28 ± 7	0.90
4th hour	pH	7.35 ± 0.4	7.36 ± 0.6	7.31 ± 0.8	0.11
	PaO2	65 ± 16	63 ± 17	64 ± 14	0.94
	PaCO2	60 ± 13	57 ± 14	67 ± 15	0.35
	HCO3	30 ± 6	30 ± 6	30 ± 7	0.53
24th hour	pH	7.37 ± 0.5	7.35 ± 0.7	7.35 ± 0.5	0.33
	PO2	68 ± 21	63 ± 24	76 ± 13	0.02*
	PCO2	55 ± 13	56 ± 13	65 ± 18	0.04*
	HCO3	30 ± 6	33 ± 7	32 ± 8	0.40
Discharge	pH	7.39 ± 0.1	7.40 ± 0.6	7.38 ± 0.1	0.52
	PaO2	66 ± 28	63 ± 16	61 ± 19	0.10
	PaCO2	52 ± 25	53 ± 15	63 ± 15	0.05*
	HCO3	29 ± 8	32 ± 7	38 ± 9	0.04*

* p< 0.05 between groups