Table 4.

Peri-operative adverse reactions

Item	Group R2	Group R4	Group R6	P value
Hypotension (%)	7 (17.5%)	8 (20.0%)	12 (30.0%)	0.367
Hypertension (%)	6 (15.0%)	4 (10.0%)	0 (0) *	0.047
Bradycardia (%)	5 (12.5%)	7 (17.5%)	8 (20.0%)	0.657
Tachycardia (%)	6 (15.0%)	5 (12.5%)	6 (15.0%)	0.934
Body movement(%)	2 (5.0%)	1 (2.5%)	0 (0)	0.359
Hypoxemia (%)	1 (2.5%)	4 (10.0%)	8 (20.0%)*	0.041
Therapy interruption (%)	0 (0)	0 (0)	0 (0)	1.000
Nausea (%)	0 (0)	0 (0)	0 (0)	1.000
Vomiting (%)	0 (0)	0 (0)	0 (0)	1.000
Aspiration (%)	0 (0)	0 (0)	0 (0)	1.000
Intra-operative awareness (%)	0 (0)	0 (0)	0 (0)	1.000

Compared with group R2, ^*P <0.05