The Effect of Electroacupuncture Preconditioning on Regional Cerebral Oxygen Saturation Levels in Elderly Patients with Diabetes

Figures & data

Figure 1 Flowchart showing trial group assignments, loss to follow-up, and analysis.

Table 1 General Patient Information (n = 20)

Item	Electroacupuncture Group	Control Group
Age (year)	68.7 ± 2.9	70.7 ± 5.2
Gender (Male/Female)	14/6	13/7
Weight (Kg, )	63.8 ± 13.1	64.5 ± 9.4
BMI	24.1 ± 4.3	23.6 ± 3.5
Diabetes duration (year)	17.2 ± 2.6	18.2 ± 3.2
Hypertension (n, %)	12 (60)	12 (60)
History of chronic lung disease	3 (15)	2 (10)
Preoperative hemoglobin level (g/L)	10.6 ±1.2	10.8 ± 1.4
Preoperative white blood cell count (×10^9/L)	7.84 ±2.21	7.39 ± 2.66
Body temperature (°C)	36.39 ± 0.37	36.42 ± 0.39
Smoking history (n, %)	10 (50)	12 (60)
Wagner classification of diabetic foot (n/%)
1	0 (0)	1 (5)
2	3 (15)	3 (15)
3	7 (35)	8 (40)
4	9 (45)	7 (35)
5	1 (5)	1 (5)
Left rSO2 (%)	54.1 ± 5.2	54.4 ± 4.8
Right rSO2 (%)	54.5 ± 4.6	53.9 ± 5.2
Anesthetic time (min)	59.2 ± 15.2	64.8 ± 14.7

Table 2 Comparison of rSO_2baseline, rSO_2max and rSO_2min Between the Two Groups (n=20)

Item	Electroacupuncture Group	Control Group	P
rSO2 maximum (%)	66.5 ± 4.12	58.4 ± 3.8	0.000*
rSO2 minimum (%)	71.1 ± 5.9	63.4 ± 4.3	0.000*
rSO2 average (%)	58.4 ± 3.2	50.3 ± 3.9	0.000*

Note: Compared with group C, *P<0.01.

Table 3 Comparison of the Number of Cases of Intraoperative Changes in Cerebral Oxygen Saturation Between the Two Groups (n=20)

Item	Electroacupuncture Group	Control Group	Z or t	P
30%≤rSO2 increased>20%(n,%)	4 (20%)	0	−4.235	0.000*
20%≤rSO2 increased>10%(n,%)	14 (70%)	5 (25%)	−3.881	0.000*
10%≤rSO2 increased>0 (n,%)	2 (10%)	8 (40%)	22.67	0.000*
Total rSO2 increase (n, %)	20 (100%)	13 (65%)
0<rSO2 decreased ≤10% (n,%)	0	5 (25%)	4.651	0.000*
10<rSO2 decreased ≤20% (n, %)	0	2 (10%)	2.31	0.001*
20<rSO2 decreased ≤30% (n, %)	0	0	0	1
Total rSO2 decrease (n, %)	0 (0)	7 (35%)

Note: Compared with group C, *P<0.01.

Table 4 Comparison of the Increase or Decrease in Variability of Cerebral Oxygen Saturation Between the Two Groups (n=20)

Item	Electroacupuncture Group	Control Group	t	P
Increased variability of rSO2	16.80 ±6.15	9.28 ± 5.50	4.078	0.000*
Reduced variability of rSO2	−4.05 ± 4.71	3.88 ± 4.89	−5.233	0.000*

Note: Compared with group C, *P < 0.01.