RT Book, Section A1 Smith, Danielle A1 Grover, Theresa A2 Hay, Jr., William W. A2 Levin, Myron J. A2 Deterding, Robin R. A2 Abzug, Mark J. SR Print(0) ID 1153302816 T1 The Newborn Infant T2 Current Diagnosis & Treatment: Pediatrics, 24e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9781259862908 LK accessmedicine.mhmedical.com/content.aspx?aid=1153302816 RD 2022/05/20 AB The newborn period is defined as the first 28 days of life. In practice, however, sick or very immature infants may require neonatal care for many months. There are three levels of newborn care. Level 1 refers to basic care of well newborns, neonatal resuscitation, and stabilization prior to transport. Level 2 refers to specialty neonatal care of premature infants greater than 1500 g or more than 32 weeks’ gestation. Level 3 is subspecialty care of higher complexity ranging from 3A to 3C based on newborn size and gestational age. Level 4 includes availability of general surgery, cardiac surgery, and extracorporeal membrane oxygenation (ECMO). Level 4 care is often part of a perinatal center offering critical care and transport to the high-risk mother and fetus as well as the newborn infant.