Table 1 Univariate analysis of preoperative and intraoperative materials in the two groups

Age (yrs)

53.17 ± 11.69

53.31 ± 10.11

Weight (kg)

71.00 ± 12.66

75.29 ± 12.72

Gender (Male/Female)

45/20

26/9

Hypertension

47(72.30%)

27(77.14%)

Diabetes mellitus

6(9.23%)

0(0.00%)

Cerebrovascular disease

5(7.69%)

6(17.14%)

Respiratory tract disease

2(3.08%)

2(5.71%)

Liver and renal disease

22(33.85%)

9(25.14%)

Marfan syndrome

2(3.08%)

0(0.00%)

Thyroid disease

3(4.62%)

1(2.86%)

Surgery history

26(40.00%)

13(37.14%)

Smoking history

22(33.85%)

8(22.86%)

Alcohol history

16(24.62%)

5(14.29%)

Digestive disease

9(13.85%)

4(6.15%)

Preoperative pericardial effusion

27(41.53%)

15(42.86%)

Preoperative valve involvement

21(32.30%)

11(31.43%)

Preoperative arrhythmia

14(21.53%)

10(28.57%)

Preoperative HCT

34.51 ± 8.46%

35.14 ± 7.61%

Preoperative HB (g/L)

111.43 ± 26.02

117.14 ± 22.72

Preoperative GLU (mmol/L)

7.17 ± 2.44

7.60 ± 1.89

Preoperative BUN (mol/L)

6.71 ± 2.35

9.55 ± 5.31

Preoperative EF

60.11 ± 3.08%

59.40 ± 3.06%

Emergency surgery

27(42.54%)

29(82.86%)

CPB time (min)

242.71 ± 48.26

271.80 ± 58.24

Cross-clamp (min)

183.35 ± 52.76

203.60 ± 69.27

DHCA time(min)

32.75 ± 12.85

31.17 ± 13.88

Cold blood reperfusion time (min)

24.52 ± 11.46

27.66 ± 13.77

Ultrafiltration (ml)

4715.38 ± 1586.19

4880.00 ± 1760.31

Surgery time (min)

518.62 ± 86.04

571.09 ± 110.29

HCT at CPB weaning

23.35 ± 3.85%

22.60 ± 3.27%

HB at CPB weaning (g/L)

80.05 ± 11.60

78.91 ± 11.46