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Table 1 Demographic information, preoperative profile and operative details in the blood-prime group

From: Duration of red blood cell storage and outcomes in pediatric cardiac surgery: an association found for pump prime blood

Variable

Patients Receiving Newer Blood

(N = 116)

Patients Receiving Older Blood

(N = 76)

P value

Transfused blood

   

Duration of storage (days)

   

   Median

3

6

0.001

   Interquartile range

2 to 4

5 to 8

 

Number of red blood cell units

   

   Median

2

2

0.985

   Interquartile range

2 to 2

2 to 2

 

Demographic features

   

Age (months)

   

   Median

6.5

8

0.089

   Interquartile range

4 to 11

5 to 11

 

Male sex -- no. of patients (%)

68 (58)

37 (49)

0.196

Weight (kgs)

   

   Median

6.15

6.7

0.244

   Interquartile range

4. 5 to 7.6

5 to 7.7

 

Clinical features

   

Hematocrit (%)

   

   Median

33

36

0.005

   Interquartile range

31 to 36

32 to 38

 

Platelet count (cells/μL)

   

   Median

321000

314000

0.903

   Interquartile range

249000 to 382000

245000 to 391000

 

Prothrombin activity (%)

   

   Median

84.5

84.7

0.903

   Interquartile range

76 to 91

76 to 94

 

aPTT (seconds)

   

   Median

31.2

31

0.724

   Interquartile range

28 to 34

29 to 34

 

Antithrombin activity (%)

   

   Median

105

104

0.190

   Interquartile range

91 to 115

89 to 113

 

Creatinine (mg/dL)

   

   Median

0.3

0.3

0.429

   Interquartile range

0.25 to 0.35

0.25 to 0.35

 

Bilirubin (mg/dL)

   

   Median

0.4

0.35

0.509

   Interquartile range

0.27 to 0.65

0.27 to 0.54

 

Aristotle score

   

   Median

7.5

6.3

0.803

   Interquartile range

6 to 8

6 to 8

 

Redo operations -- no. of patients (%)

6 (5.2)

4 (5.1)

0.296

Operative details

   

Procedure -- no. of patients (%)

   

   ASD repair

2 (2)

2 (3)

 

   VSD repair

39 (34)

27 (36)

 

   TOF correction

18 (16)

12 (16)

 

   Arterial switch

10 (9)

10 (13)

 

   AV canal

16 (14)

10 (13)

 

   Others

31 (25)

16 (19)

 

Priming volume (mL)

   

   Median

400

400

0.292

   Interquartile range

380 to 400

380 to 400

 

Transfused RBC volume (mL)

   

   Median

240

240

0.792

   Interquartile range

216 to 300

240 to 300

 

CPB duration (minutes)

   

   Median

82

74

0.480

   Interquartile range

58 to 110

52 to 120

 

Lowest temperature (°C)

   

   Median

29.6

30

0.771

   Interquartile range

28.3 to 31

28 to 32

 

Lowest hematocrit (%)

   

   Median

28

28

0.151

   Interquartile range

26 to 29

26 to 30

 
  1. aPTT = activated partial thromboplastin time; ASD = atrial septal defect; AV = atrioventricular; CPB = cardiopulmonary bypass; TOF = tetralogy of Fallot; VSD = ventricular septal defect.
  2. Continuous variables are described as medians and interquartile ranges, and P values were calculated by the Wilcoxon rank-sum test; categorical variables are described as numbers and percentages, and P values were calculated by Pearson's chi-square test.