A full-term mother suffering from gestational diabetes (GDM) has given birth to a 4 kg baby. What should be regularly checked to prevent complications?

1. A

   Blood for CRP

2. B

   CBC

3. C

   Blood glucose

4. D

   Coombs test

Appeared in: MP CHO - 2022

Explanation

• Infants of diabetic mothers (IDMs), especially large babies (>4 kg), are at a high risk for hypoglycemia (low blood sugar) after birth.
• During pregnancy, the mother's high blood sugar causes the fetus to produce excess insulin (fetal hyperinsulinemia).
• After birth, the maternal glucose supply is cut off, but the newborn's high insulin levels persist, causing a rapid and dangerous drop in blood glucose.
• This neonatal hypoglycemia typically occurs within the first 1-3 hours of life and requires immediate and regular monitoring to prevent seizures and potential neurological damage.

Why Other Options Were Wrong

• Option A: C-Reactive Protein (CRP) is a marker for inflammation or infection. While any newborn can get an infection, it is not the primary and most immediate complication expected specifically due to maternal GDM.
• Option B: A Complete Blood Count (CBC) is not the priority. While it can detect polycythemia (high hematocrit), a known complication in IDMs, hypoglycemia is a more acute, common, and immediately life-threatening risk that must be addressed first.
• Option D: The Coombs test is used to diagnose hemolytic disease of the newborn, which is caused by blood group incompatibility (e.g., Rh or ABO) between the mother and fetus. This condition is unrelated to maternal diabetes.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Postnatal complications in an infant of a diabetic mother (IDM) as background academic context rather than a clinical decision trigger.
• Nurses must screen at-risk infants (IDMs, LGA, SGA, preterm) for hypoglycemia with a heel-stick blood glucose test, typically at 1 hour of age and then before each feeding, as per hospital protocol.
• Prompt intervention with early feeding (breast milk or formula) is the first line of treatment. If hypoglycemia persists or the infant is symptomatic (e.g., jittery, lethargic, poor feeding), intravenous (IV) dextrose is administered to prevent seizures and long-term neurological impairment.
• What if? If the mother had well-controlled GDM and the baby's birth weight was normal (e.g., 3.2 kg), the baby would still be considered at risk for hypoglycemia and would require blood glucose monitoring, although the risk level might be lower than for a macrosomic infant.

How to Approach the Question

• Step 1: Analyze the clinical scenario. The key information is 'mother with gestational diabetes (GDM)' and '4 kg baby' (macrosomia or large for gestational age - LGA).
• Step 2: Connect these clinical cues to potential neonatal complications. An infant of a diabetic mother (IDM), especially an LGA infant, is at high risk for specific metabolic problems.
• Step 3: Recall the most common and immediate complication for an IDM. The pathophysiology involves fetal hyperinsulinemia in response to maternal hyperglycemia. After birth, this leads to rapid glucose consumption and subsequent hypoglycemia.
• Step 4: Evaluate the given options in light of this primary risk. 'Blood glucose' directly measures for hypoglycemia.
• Step 5: Systematically eliminate the other options. CRP is for infection, CBC for blood counts (like polycythemia, a less immediate risk), and Coombs test for blood incompatibility. None of these are the priority check for an IDM.
• Step 6: Conclude that regular monitoring of blood glucose is the most critical intervention to prevent immediate complications.

Concept Tested & Keywords

• Concept Tested: Postnatal complications in an infant of a diabetic mother (IDM)
• Stem keywords: gestational diabetes (GDM), full-term mother, 4 kg baby, complications
• Lead-in keywords: regularly checked
• Clinical cues: Mother with GDM suggests metabolic instability in the newborn.
• Clinical cues: Baby weight of 4 kg indicates macrosomia, a classic sign in infants of diabetic mothers, which increases the risk of hypoglycemia.

Question ID

QkaVJTTsoOsADZVuCl1bNd

Copy ID

Reference Book

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1151-1153

E6 Medicine Harrison 22e Part 2 p. 1805-1807