Table 4.

Comparison of blood gas indicators between the two groups ($\overline{x}\pm s$).

Group	PaCO2 (mmHg)		PaO2 (mmHg)		SaO2 (%)		PH
	Before nursing	After nursing	Before nursing	After nursing	Before nursing	After nursing	Before nursing	After nursing
Control group (n = 60)	72.38 ± 7.26	62.82 ± 6.04	52.62 ± 5.49	67.03 ± 6.56	74.39 ± 4.85	82.31 ± 4.91	7.18 ± 0.05	7.34 ± 0.03
Study group (n = 60)	73.09 ± 7.14	51.96 ± 4.31	52.93 ± 5.52	81.14 ± 7.06	73.76 ± 4.32	94.82 ± 4.71	7.19 ± 0.04	7.48 ± 0.06
t	0.540	11.340	0.308	11.340	0.747	14.240	1.210	16.170
P	0.590	0.001	0.758	0.001	0.457	0.001	0.229	0.001