Impact of dexmedetomidine-assisted anesthesia in elderly patients undergoing radical resection of colon cancer

Table 3 Comparison of fluctuations of mean arterial pressure, heart rate, and SpO₂ in the two groups, mean ± SD

Index	Group	Before anesthesia induction	5 min after intubation	Intraoperative 30 min	During extubation	3 min after extubation
MAP (mmHg)	A (n = 83)	101.8 ± 5.4	89.6 ± 4.1	87.0 ± 5.0	105.8 ± 5.4	100.6 ± 6.2
	B (n = 82)	103.0 ± 5.8	86.2 ± 5.3	83.1 ± 4.9	107.0 ± 6.7	102.3 ± 6.8
	t value	-1.376	4.612	5.060	-1.267	-1.678
	P value	0.171	0.000	0.000	0.207	0.095
HR (beats/min)	A (n = 83)	78.9 ± 5.4	73.0 ± 5.8	71.7 ± 5.5	83.2 ± 6.2	80.0 ± 6.1
	B (n = 82)	77.4 ± 6.0	71.4 ± 6.2	69.6 ± 6.3	84.4 ± 6.7	81.7 ± 6.8
	t value	1.688	1.712	2.282	-1.194	-1.691
	P value	0.093	0.089	0.024	0.234	0.093
SpO2 (%)	A (n = 83)	98.64 ± 0.77	95.40 ± 0.60	95.72 ± 0.58	96.81 ± 0.80	97.48 ± 0.77
	B (n = 82)	98.80 ± 0.81	95.26 ± 0.57	95.54 ± 0.60	96.64 ± 0.75	97.31 ± 0.69
	t value	-1.301	1.536	1.959	1.408	1.493
	P value	0.195	0.126	0.052	0.161	0.137

MAP: Mean arterial pressure; HR: Heart rate.