Classification of
NEC
Stage 1:
suspect NEC - signs of sepsis, feeding intolerance ± bright red blood per rectum
Stage 2:
Proven NEC- all of the above, pneumatosis, ± portal vein gas ±
metabolic acidosis ± ascites
Stage 3: Advanced NEC- all of the
above, clinical instability, definite ascites ± pneumoperitoneum