This study will assess the diagnostic contribution of early abdominal ultrasound for acute abdomen in premature newborns.
Early ultrasound assessment would provide diagnostic assistance, in conjunction with clinical examination and biological testing, in the three main clinical situations encountered with an acute abdomen in premature infants: enterocolitis (digestive translocation of a bacterium secondary to inflammation, local fragility of the digestive tract, associated ischemic phenomena), reflex ileus (decrease in intestinal peristalsis secondary to peritoneal reactivity following inflammatory phenomena) and digestive immaturity (expressed by bloating, regurgitation, absence of spontaneous transit, related to the degree of prematurity).