Components of Metabolic Derangement and Paracentesis for Determination of Surgery in Preterm Neonates With Necrotizing Enterocolitis.

The aim of this clinical trial is to associate paracentesis with positive metabolic derangement components for surgical determination in preterm infants with necrotizing enterocolitis. The main questions it aims to answer are: * are the combination of metabolic derangement components and paracentesis good indicators for determining early surgery in preterm patients with necrotizing enterocolitis? * With the use of the previously mentioned indicators, can mortality in these patients be reduced? Participants will undergo determination of the 7 parameters of the metabolic deterioration components and those with three or more positive points will undergo paracentesis and if this is also positive, it will be determined that the patient requires surgical management. The researchers will compare with a control group to see the differences in surgical variables (length of necrotic bowel, length of viable bowel, need for intestinal diversion and surgical reintervention) and mortality.