In general, regular assessment of gastric residuals and its´ evaluation prior to every feeding is considered standard practice for preterm neonates in neonatal intensive care units. It is believed useful to confirm correct placement of the orogastric or nasogastric tube and thought of as necessary to aid the decision of enteral feeding advancement by informing about possible remains of contents from previous feeding. Furthermore, evaluation of gastric residuals is routinely performed in order to assess for feeding intolerance and used as a possible indicator of risk for development of necrotizing enterocolitis.