Gravitas Feeding Tube System Placement Validation in Neonates

Eligibility Criteria

• * Infants in the Newborn Intensive Care Unit or on the general medical floor requiring a 5-8 Fr NG tube. The desired size of the feeding tube should be determined clinically, and the Gravitas 5-8 Fr Feeding Tube should only be placed if that size is appropriate.
• * Age at enrollment: 0 to 18 weeks post-partum. Can be up to 12 weeks preterm (gestational age ≥ 28 weeks).
• * Suitable to start enteral (gastric but not post-pyloric) feeding
• * Anticipated to receive enteral feeding (either bolus or continuous feeds) for more than 6 hours. If enteral nutrition has already been initiated, indicated for replacement of an orogastric/nasogastric feeding tube.
• * Ability to have a legally authorized representative provide informed consent Both neonates on a ventilator (non-invasive or invasive ventilation) or not requiring a ventilator are eligible for this study.
• * Known major upper airway malformation (e.g. tracheoesophageal fistula)
• * Known major GI malformation (e.g. malrotation)
• * NPO status - neonate expected to remain NPO/NPG for the following 72 hours
• * Has a medical condition that drastically affects gastric acid-secretion (e.g. Zollinger-Ellison Syndrome, congenital achlorhydria, gastrointestinal perforation/leak/obstruction);
• * Has had removal of part of the stomach
• * Critically ill, facing imminent death
• * Neonate on ECMO
• * Deemed unsuitable for enrollment in study by the site principal investigator based on the patients' medical history
• * Infant needs an MRI in the immediate future (e.g. 6-12h)
• * Infant needs post-pyloric feeds (distal to stomach)
• * Infant has a basilar skull fracture