Effects of High-Frequency Chest Wall Oscillation Expectoration System on Pulmonary Rehabilitation and Cortisol Function in Patients with Severe AECOPD

Table 2

Comparison of blood gas indexes between the two groups (, mmHg).

Group	PaO2		PaCO2
	Before the treatment	After treatment	Before the treatment	After treatment
Group A ()
Group B ()
	0.122	3.137	0.161	-2.735
	0.903	0.003	0.873	0.008

Note: vs. before treatment, ; PaO₂: partial pressure of blood oxygen; PaCO₂: partial pressure of carbon dioxide.