A nurse is caring for an infant with Neonatal Abstinence Syndrome (NAS). Which of the following statements concerning NAS is false.

Choice A rationale

Neonatal jaundice, or hyperbilirubinemia, is common and frequently results from a higher-than-normal red blood cell mass in the newborn and a shorter lifespan of these cells. This rapid breakdown releases excess unconjugated bilirubin, which the newborn's immature liver cannot process and excrete quickly enough, leading to its accumulation in the skin and sclera.

Choice B rationale

Although severe or prolonged jaundice can indicate a serious underlying disorder, such as liver failure or biliary atresia, most physiologic jaundice is a transient, normal occurrence due to liver immaturity, not a sign of immediate organ failure. Pathological jaundice requires a thorough investigation to rule out metabolic or liver pathology.

Choice C rationale

Adequate intake of breast milk or formula is crucial because it promotes gastrointestinal motility and the passage of meconium, which contains bilirubin. Delayed feeding can lead to increased enterohepatic recirculation of bilirubin, worsening jaundice, but the underlying cause is usually the rapid red blood cell breakdown, not solely a lack of feeding.

Choice D rationale

Jaundice caused by the newborn's immune system attacking red blood cells, known as hemolytic disease of the newborn (e.g., ABO or Rh incompatibility), is a type of pathological jaundice. While this does cause elevated bilirubin, it is not the explanation for the typical, common physiologic jaundice seen in most healthy newborns.

Choice A rationale

Testosterone is the primary male sex hormone, an androgen, responsible for the development of male secondary sex characteristics and reproductive tissues. While present in trace amounts in females, it has no direct role in the pulmonary physiology or the production of pulmonary surfactant, which is the critical deficiency leading to respiratory distress syndrome (RDS) in preterm neonates.

Choice B rationale

Somatotropin, also known as growth hormone (GH), is a peptide hormone responsible for stimulating growth, cell reproduction, and regeneration. Its main effects are on somatic growth and metabolism. Although many hormones influence fetal lung maturation indirectly, an altered secretion of somatotropin is not the primary physiological cause for the development of neonatal respiratory distress syndrome.

Choice C rationale

Surfactant is a lipoprotein complex produced by Type II alveolar cells. Its function is to lower the surface tension within the alveoli, preventing their collapse upon expiration. In preterm infants, especially those born before 34 weeks' gestation, the production of adequate amounts of surfactant is often immature or insufficient, leading to widespread atelectasis and the clinical picture of respiratory distress syndrome.

Choice D rationale

Progesterone is a major female sex hormone primarily involved in the menstrual cycle, pregnancy, and embryogenesis. It plays a crucial role in maintaining pregnancy by supporting the uterine lining. While steroid hormones are generally involved in fetal development, altered secretion of progesterone is not the main physiological factor causing the acute alveolar collapse seen in respiratory distress syndrome.