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