Table 2 The characteristics of included patients

Male/female

19/16

136/112

1.089

0.071

Age(y)

3.12 ± 2.58

6.91 ± 5.24

1.124

0.002

Preoperative oxygen saturation(%)

91.62 ± 10.31

94.23 ± 10.55

7.033

0.041

Inner diameter of left atrium (mm)

17.93 ± 7.18

17.17 ± 8.41

3.126

0.085

End diastolic diameter of left ventricle (mm)

26.25 ± 8.24

27.57 ± 7.09

7.104

0.098

End systolic diameter of left ventricular (mm)

17.43 ± 7.11

17.52 ± 7.14

4.116

0.102

Left ventricular ejection fraction (%)

67.41 ± 8.33

68.12 ± 7.51

10.274

0.117

Inner diameter of pulmonary artery (mm)

21.28 ± 9.26

20.86 ± 9.33

4.201

0.079

 Left to right shunt

13 (37.15%)

93 (37.50%)

1.192

0.085

 No shunt

18 (51.43%)

121 (48.79%)

1.169

0.059

 Right to left shunt

2 (5.71%)

19 (7.66%)

1.202

0.076

 Two-way shunt

2 (5.71%)

15 (6.05%)

1.113

0.069

 Left to right shunt

12 (34.29%)

95 (38.31%)

1.120

0.072

 No shunt

17 (48.57%)

124 (50%)

1.286

0.066

 Right to left shunt

2 (5.71%)

19 (7.66%)

1.113

0.084

 Two-way shunt

4 (11.43%)

10 (4.03%)

1.208

0.038

 White blood cell count (× 10⁹ ·L⁻¹)

9.03 ± 1.61

8.93 ± 1.23

1.128

0.077

 Platelet count (×10⁹ ·L⁻¹)

213.71 ± 84.52

210.24 ± 123.12

1.246

0.104

 Red blood cell count(×10⁹ ·L⁻¹)

4.73 ± 1.17

4.66 ± 1.14

1.093

0.071

 Creatinine (μmol·L⁻¹)

34.13 ± 14.36

33.26 ± 15.23

2.146

0.085

 Alanine aminotransferase (U ·L⁻¹)

18.27 ± 10.12

17.13 ± 12.56

3.108

0.063

 Aspartate aminotransferase(U ·L⁻¹)

19.34 ± 12.32

19.46 ± 15.30

2.997

0.102

 Duration of surgery (min)

125.52 ± 66.49

124.59 ± 75.17

12.084

0.105

 Duration of CPB (min)

67.73 ± 22.97

51.09 ± 23.95

9.169

0.013

 Infusion of red blood cell suspension (mL)

224.36 ± 98.14

228.65 ± 92.17

18.104

0.098

 Postoperative residual shunt

4 (11.43%)

3 (1.21%)

1.297

0.018