Table 1.

Experimental results

Number	Gender	Age (year)	Height (cm)	Weight (kg)	Other underlying diseases complicated before surgery	Preoperative MMSE score	Remedy analgesic frequency and medication	Number of effective compressions of analgesic pump	Total number of remedial analgesia + number of effective compressions of analgesia pump
Experimental group 1: esketamine 1.0 mg/kg, sufentanil 2 µg/kg
1	Male	71	175	80	Hypertension	29	0	20	86
2	Female	62	155	50	Hypertension, myocardial ischemia	29	0	18
3	Female	56	162	60		29	0	32
4	Female	58	160	55		29	1, bucinazine 100 mg	5
5	Female	51	150	60		29	0	10
Experimental group 2: esketamine 1.5 mg/kg, sufentanil 2 µg/kg
6	Male	59	164	70	Hypertension	29	0	37	73
7	Male	47	170	65		27	1, piperidine 50 mg	22
8	Female	53	164	65		29	0	12
9	Female	43	160	60		29	0	1
10	Female	53	163	79	Hypertension, coronary heart disease	29	0	0
Experimental group 3: esketamine 2 mg/kg, sufentanil 2 µg/kg
11	Male	40	162	62		27	2, bucinazine 200 mg	22	98
12	Male	66	168	75	Hypertension, coronary heart disease	28	0	3
13	Male	70	170	80	Hypertension	28	1, bucinazine 100 mg	8
14	Male	41	170	76		28	0	60
15	Male	61	170	60		28	0	2
Control group: sufentanil 2 µg/kg
16	Male	53	172	80	Hypertension, diabetes	29	2, bucinazine 200 mg	20	139
17	Female	69	160	60	Hypertension	29	1, bucinazine 100 mg	39
18	Male	62	170	74		29	0	39
19	Female	61	157	70		29	0	36
20	Male	41	173	72		28	1, bucinazine 100 mg	1