A nurse is caring for a postterm newborn (41 weeks gestation) who was born 4 hours ago and appears alert but has dry, peeling skin and long fingernails. Which nursing intervention should be the priority?

Postterm newborns are at high risk for hypoglycemia due to depleted glycogen stores, making frequent blood glucose monitoring the priority to prevent complications like seizures. Other assessments are important but less urgent.

Understanding the Postterm Newborn
A newborn delivered at 41 weeks gestation is classified as postterm. The physical characteristics you noted—dry, peeling skin and long fingernails—are classic findings resulting from the loss of the protective vernix caseosa and continued growth in utero beyond the typical 40 weeks. While the newborn appears alert, the postterm state is a significant risk factor for metabolic instability, specifically neonatal hypoglycemia, due to depleted glycogen stores.

Priority Nursing Intervention
The priority intervention is to monitor blood glucose levels every 2-3 hours for the first 24 hours. The foundational principle of neonatal care dictates that the most immediate threat to a neurologically vulnerable but otherwise stable newborn is inadequate energy substrate for the brain. Postterm newborns have exhausted placental nutrient supply and have low glycogen reserves, placing them at high risk for hypoglycemia after birth. The cited evidence underscores that neonatal hypoglycemia is a common clinical disturbance in the immediate postnatal period, and its interaction with other physiological stressors, such as hypothermia, is often underrecognized ^[1]. Given that hypoglycemia affects up to 15% of all newborns and lacks a uniform definition, proactive screening based on risk factors like postmaturity is essential to prevent potential long-term neurodevelopmental sequelae ^[2].

Analysis of Other Options
- Option 2: Assess for signs of respiratory distress syndrome. Respiratory distress syndrome (RDS) is primarily a condition of prematurity caused by surfactant deficiency. A postterm newborn at 41 weeks has mature lungs and is not at risk for RDS. While respiratory distress from other causes (such as meconium aspiration) is possible, it is not the most probable or immediate concern in an alert newborn with the described findings.
- Option 3: Check for meconium-stained amniotic fluid in the delivery record. While postterm newborns are at increased risk for passing meconium in utero, this is a retrospective chart review, not a direct nursing intervention for the newborn’s current physiological status. The presence or absence of meconium does not change the immediate metabolic risk. The priority is a direct assessment and intervention to prevent a current complication.
- Option 4: Evaluate the newborn's reflexes and muscle tone. This is a component of a comprehensive neurological examination. While important, it is not the priority over a potentially life-threatening metabolic condition. An alert newborn with hypoglycemia may initially present with normal tone and reflexes before decompensating into jitteriness, lethargy, or seizures. Early detection through glucose screening allows for intervention before neurological deterioration occurs.

Clinical Reasoning and Evidence Synthesis
The clinical decision-making here is driven by the risk profile of the patient. The postterm newborn is a vulnerable population for hypoglycemia, a fact supported by the literature linking risk factors such as being born small for gestational age or postmaturity to metabolic disturbances ^[1]. The immediate postnatal period is a critical window where hypothermia and hypoglycemia can create a synergistic cycle of deterioration; hypothermia increases metabolic demand and glucose consumption, while hypoglycemia impairs thermogenesis ^[1]. Therefore, a systematic screening protocol, as recommended by various management guidelines, is the most effective strategy to identify and manage asymptomatic hypoglycemia before it causes harm ^[2]. The intervention of monitoring blood glucose directly addresses the highest-probability, highest-impact risk for this specific newborn.