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Table 2 Acid-base balance, electrolyte, lactate, and glucose levels during cardiopulmonary bypass (after 10 minutes on CPB and peak levels recorded during CPB)

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 = 123)
Patients Receiving Older Blood
(N = 69)
P value
pH    
   Median 7.41 7.42 0.432
   Interquartile range 7.36 to 7.44 7.37 to 7.47  
pCO2 (mmHg)    
   Median 42 40 0.297
   Interquartile range 36 to 46 35 to 43  
Base excess    
   Median 1.4 1.3 0.994
   Interquartile range -1.2 to 4.3 -1.3 to 3.8  
Potassium (mEq/L)    
   Median 4.7 4.6 0.387
   Interquartile range 3.7 to 5.6 3.5 to 5.3  
Calcium (mEq/L)    
   Median 1.4 1.4 0.168
   Interquartile range 1.2 to 1.6 1.2 to 1.6  
Lactate (mmol/L)    
   Median 1.8 1.9 0.127
   Interquartile range 1.2 to 2.3 1.5 to 2.5  
Glucose (mg/dL)    
   Median 142 141 0.469
   Interquartile range 127 to 168 121 to 165  
Peak potassium (mEq/L)    
   Median 5.3 5.6 0.746
   Interquartile range 4.7 to 6 4.8 to 6  
Peak lactate (mmol/L)    
   Median 1.9 2.0 0.237
   Interquartile range 1.5 to 2.5 1.5 to 2.8  
Peak glucose (mg/dL)    
   Median 175 186 0.630
   Interquartile range 154 to 215 143 to 227  
  1. Variables are described as medians and interquartile ranges, and P values were calculated by the Wilcoxon rank-sum test.