A nurse is caring for a postterm newborn who is 42 weeks gestation. Which nursing intervention should be the priority for this infant?
1Administer prophylactic antibiotics to prevent infection
2Initiate phototherapy to prevent hyperbilirubinemia
3Place the infant in a radiant warmer to maintain body temperature
4Monitor blood glucose levels closely✓ 정답
해설
Postterm newborns are at high risk for hypoglycemia due to depleted glycogen stores and increased metabolic demands, making frequent blood glucose monitoring and early feeding the priority. Other options address infection, hyperbilirubinemia, or thermoregulation, which are less immediate concerns.
Core Nursing ExplanationKey Concept Analysis: This question assesses the priority nursing intervention for a Postterm newborn (gestational age > 42 weeks). The core pathophysiology involves placental insufficiency. As the placenta ages beyond term, its function declines, leading to decreased nutrient and oxygen transfer to the fetus. This results in the infant being born with depleted glycogen stores and a higher metabolic rate, creating a significant risk for Hypoglycemia (low blood glucose) shortly after birth.
Answer Rationale: Key Point! The priority is Monitoring blood glucose levels closely. Hypoglycemia in a newborn can lead to serious neurological sequelae, including seizures and brain injury. Early detection through monitoring (e.g., heel stick glucose checks per protocol) allows for prompt intervention, such as early and frequent feedings or IV dextrose administration, preventing complications. This aligns with the nursing process principle of addressing the most immediate threat to physiological stability (Airway, Breathing, Circulation, and in neonates, Glucose is often considered a critical "D" - Deficit).
Distractor Analysis:
Watch out for confusion! Option 1: Administering prophylactic antibiotics is not a standard intervention for postterm infants unless specific risk factors for infection (e.g., prolonged rupture of membranes, maternal fever) are present. The primary risk is metabolic, not infectious.
Option 2: Initiating phototherapy is a priority for infants with Hyperbilirubinemia (jaundice). While postterm infants can have dry, cracked skin that increases bilirubin reabsorption, the risk for significant jaundice requiring immediate phototherapy is not the primary immediate risk after birth. Hypoglycemia must be addressed first.
Option 3: Placing the infant in a radiant warmer is a standard intervention for Thermoregulation in all newborns to prevent cold stress. However, it is a universal precaution, not the specific priority uniquely linked to the pathophysiology of postmaturity. Maintaining normothermia is crucial but does not override the immediate metabolic threat of hypoglycemia in this population.
Related Concepts: Postterm infants often exhibit characteristics like Long nails, Peeling skin, Minimal vernix caseosa, and may be Meconium-stained (increasing the risk for Meconium aspiration syndrome (MAS)). Nursing care also includes monitoring for respiratory distress related to MAS and assessing for signs of Polycythemia (hematocrit > 65%), which can contribute to hypoglycemia and hyperbilirubinemia.
Concept Summary
Blood glucose monitoring, Assess for meconium/ respiratory distress
Anatomy, Physiology & Pharmacology Points
Physiology: The placenta's primary functions (gas exchange, nutrient transfer, waste removal) decline after 40 weeks. This leads to a state of relative starvation for the fetus, forcing it to use its liver and muscle glycogen stores, leading to depletion at birth.
Lab Values: Newborn hypoglycemia is typically defined as a blood glucose level < 40 mg/dL (2.2 mmol/L) in the first 24 hours, or < 45 mg/dL (2.5 mmol/L) thereafter. Treatment thresholds may vary by institution.
Pharmacology: If feeding is insufficient, IV Dextrose 10% in Water (D10W) is the first-line pharmacologic treatment. It must be administered Watch out for confusion! via a central line or with extreme caution peripherally due to the risk of tissue infiltration and necrosis.
Visual Association: Picture a wrinkled, skinny, postterm baby with long nails. Think: "This baby looks old and tired because it ran out of food (glycogen) in the womb. First thing I do? Check its blood sugar!"
High-Frequency NCLEX Topics
The NCLEX-RN loves to test priority-setting for at-risk newborns. You must differentiate the primary risk based on gestational age (Preterm vs. Term vs. Postterm) and condition (e.g., infant of diabetic mother). Always ask yourself: "What is the most immediate, life-threatening complication for THIS specific baby?" For postterm, the answer is almost always hypoglycemia.
Watch Out for Question Variations!
Symptom Identification: "The nurse assesses a 42-week gestation newborn. Which finding requires immediate intervention?" (Answer: Jitteriness, lethargy, high-pitched cry—signs of hypoglycemia).
Parent Teaching: "A nurse is teaching the parents of a postterm newborn. Which statement by the parent indicates understanding?" (Correct: "We will wake the baby to feed every 2-3 hours to keep his blood sugar up.").
Change in Priority: If the question adds "meconium-stained amniotic fluid," then airway management (suctioning) becomes the immediate priority at the moment of birth, followed closely by glucose monitoring.
Nursing Clinical Practice GuideClinical Scenario: You are the nurse receiving a newborn in the well-baby nursery. The delivery note states: "Female infant, born vaginally at 42 weeks 3 days gestation. Apgars 8 and 9. Amniotic fluid was clear. Birth weight 3.8 kg. Infant appears alert but has dry, peeling skin and long fingernails."
Nursing Intervention Strategy:
Initial Assessment & Thermoregulation: Place the infant under a radiant warmer, dry thoroughly, and obtain initial vital signs. Perform a head-to-toe assessment, noting the classic postterm characteristics.
Priority Action - Glucose Monitoring: Check the initial blood glucose via heel stick per your hospital's protocol (often at 1 hour of age). Document the result. The protocol likely dictates re-checking at specific intervals (e.g., before feeds at 2, 4, 6, 12, and 24 hours of life).
Early Feeding: Facilitate the first breastfeed or offer formula within the first hour if possible. Early and frequent feeding (every 2-3 hours) is the primary non-pharmacologic intervention to maintain normoglycemia.
Ongoing Surveillance: Monitor for other complications: respiratory status (for subtle signs of meconium aspiration), color (for ruddy appearance suggesting polycythemia), and behavior (lethargy, jitteriness).
Parent Education & Bonding: Educate the parents on the importance of frequent feeding for their baby's specific needs. Encourage skin-to-skin contact to promote bonding and thermoregulation while explaining the baby's skin appearance is normal for postterm infants.
Patient Safety and Precautions:
Heel Stick Technique: Use a warm pack on the heel to increase blood flow. Puncture the lateral plantar surface to avoid nerve damage. Do not squeeze the foot too forcefully, as this can cause hemolysis and falsely lower glucose readings.
Hypoglycemia Protocol: Know your unit's specific treatment algorithm. If the glucose is < 40 mg/dL, the usual steps are: 1) Feed the infant (breast or bottle). 2) Re-check glucose in 30-60 minutes. 3) If still low, may need supplemental formula or IV dextrose.
IV Dextrose Administration: If IV therapy is required, ensure the line is patent. D10W is hypertonic and can cause severe tissue injury if it infiltrates. Monitor the IV site closely.
Nursing Procedure & Medication FlowProcedure: Heel Stick for Blood Glucose
1. Identify infant using two identifiers. 2. Warm heel for several minutes. 3. Cleanse site with alcohol swab and allow to dry. 4. Use an automatic lancet device on the lateral aspect of the heel. 5. Wipe away the first drop of blood. 6. Collect blood drop onto test strip or in a micro-container. 7. Apply pressure to site until bleeding stops. 8. Comfort the infant.
Medication: IV Dextrose 10% (D10W) Bolus/Maintenance
Indication: Symptomatic hypoglycemia or persistent low glucose unresponsive to feeding.
Dose: Typical bolus is 2-4 mL/kg of D10W. Maintenance drip is calculated to provide 4-8 mg/kg/min of glucose.
Administration: Administer bolus slowly over several minutes. For a continuous infusion, use an infusion pump. Key Point! Continuously monitor blood glucose levels during infusion to avoid rebound hyperglycemia.
A Word from Your Senior Nurse
"Remember, the postterm newborn is like a marathon runner who has hit 'the wall.' Their fuel tanks (glycogen stores) are empty. Your vigilant monitoring and promotion of early feeding are the quickest ways to refuel them and get them back on a stable course. In clinical practice, you'll see these babies often. Don't let their alert initial appearance fool you—they can crash quickly if their glucose isn't supported. On the NCLEX and at the bedside, thinking pathophysiologically ('Why is this happening?') will always guide you to the right priority. You've got this!"
Postterm Infant — A newborn born after 42 completed weeks of gestation. At risk for placental insufficiency, hypoglycemia, meconium aspiration, and polycythemia.
Hypoglycemia — Low blood glucose level. In newborns, often defined as <40 mg/dL. Can cause jitteriness, lethargy, apnea, and seizures if untreated.
Placental Insufficiency — Decline in placental function after term, leading to reduced transfer of oxygen and nutrients to the fetus. The key pathophysiology in postterm pregnancies.
Meconium Aspiration Syndrome — Respiratory distress in a newborn caused by inhalation of meconium-stained amniotic fluid into the lungs. A risk for postterm infants experiencing fetal distress.
Polycythemia — Abnormally high concentration of red blood cells (hematocrit >65%). In postterm infants, caused by chronic hypoxia. Can lead to hyperviscosity, hypoglycemia, and jaundice.