| Severe sepsis | |
| Severe asphyxia | |
| Abnormal abdominal film | |
| Decreased perfusion | |
| PDA or Indocin Treatment | |
| Maternal drug use during pregnancy, increased risk of NEC | |
| Extremely low birth rate infants | |
| Infants less than 750 grams | |
| Frequent or large emesis or residuals | |
| Heme positive stools | |
| Abdominal distention or increased girth | |
| Abnormal abdominal film | |
| Bilious residuals or emesis |