Efficacy and Safety Profile of Montgomery T-Tube Implantation in Patients with Tracheal Stenosis

Table 2

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

Group	Time	pH value (mmHg)	SaO2 (mmHg)	PaCO2 (mmHg)
Observation group (n = 69)	Before treatment	7.27 ± 0.12	83.09 ± 7.81	57.91 ± 5.41
	One week after operation	7.39 ± 0.18^a, b	98.03 ± 8.91^a, b	40.71 ± 8.62^a, b
	Difference before and after treatment	0.12 ± 0.06	14.94 ± 1.10	−17.20 ± 3.21
Control group (n = 69)	Before treatment	7.26 ± 0.62	83.87 ± 8.73	57.03 ± 5.19
	One week after operation	7.35 ± 0.92^a	95.42 ± 9.01^a	43.82 ± 8.38^a
	Difference before and after treatment	0.09 ± 0.30	11.550.28±	14.21 ± 3.14

Note: compared with the same group before treatment () and the control group after treatment ().