Normal laboratory reference values in newborns after 72 hours.
| Selected Laboratory Value in Neonates After 72 h of Age | |
|---|---|
| Serum WBC count | 9000-30 000 cells/mm 3 |
| Serum platelet count | 150 000-450 000 cells/μL |
| ANC: neutropenia | < 1720 cells/mm 3 after 72 h |
| I/T ratio | ≤ 0.2 |
| CSF/plasma glucose ratio A | 0.42-1.10 |
| CSF protein (95th percentile) A | |
| 0-14 d | 132 mg/dL |
| 15-28 d | 100 mg/dL |
| Hypoglycemia seizure threshold B | ≤ 30 mg/dL |
| Hypocalcemia seizure threshold | |
| Total serum calcium | < 8 mg/dL |
| Ionized calcium | < 0.8 mmol/L |
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