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High-Risk Newborns

- Blood Glucose Disorders in Neonates

Glucose is an essential energy source for newborns. During pregnancy, the fetus depends on the mother for glucose through the placenta. After birth, the infant must regulate blood glucose levels independently. Normal neonatal blood glucose levels range from 50 to 125 mg/dL.

Neonatal Hypoglycemia (Low Blood Glucose):

Neonatal hypoglycemia is defined as a blood glucose level below 45 mg/dL. It is a critical condition that can lead to serious complications, particularly affecting the brain.

Infants at Risk for Hypoglycemia:

  • Infant of a diabetic mother
  • Low birth weight (LBW) or small for gestational age (SGA) infant
  • Large for gestational age (LGA) infant
  • Infant with hypothermia
  • Infant with respiratory distress
  • Infant with birth asphyxia
  • Infant with neonatal sepsis
  • Infants whose mothers received corticosteroids or high-concentration IV glucose during labor

Symptoms of Hypoglycemia:

Hypoglycemia may be asymptomatic, making it particularly dangerous. Potential symptoms include:

  • Lethargy
  • Jitteriness
  • Irritability
  • Cyanosis
  • Seizures
  • Poor feeding or weak suck
  • Irregular breathing
  • Apneic episodes
  • Bradycardia

Prevention:

Immediately after birth, neonates at risk of hypoglycemia should be fed either orally or via a feeding tube within the first hour. If oral feeding is not possible, 10% dextrose solution should be administered intravenously.

Blood Glucose Monitoring in the NICU:

Equipment Required:

  • Blood glucose test strips
  • Small lancets
  • Alcohol swabs
  • Gloves
  • Sterile gauze
  • Adhesive bandages

Procedure:

  1. Wash hands thoroughly.
  2. Warm the infant’s heel with a cotton pad for 5 minutes to increase blood flow.
  3. Choose a puncture site on the outer edges of the heel, avoiding the center.
  4. Clean the site with alcohol and allow it to dry.
  5. Prepare the lancet and test strip.
  6. Hold the heel firmly and prick the chosen site.
  7. Wipe away the first drop of blood with sterile gauze and use the second drop for testing.
  8. Apply gentle pressure to stop bleeding.
  9. Read the glucose level as per the test strip instructions.
  10. Dispose of used materials properly and wash hands.

Treatment of Neonatal Hypoglycemia:

  • Immediately notify the physician.
  • Send a blood sample to the lab for glucose measurement.
  • If blood glucose is less than 30 mg/dL or symptoms are present, administer 2 mL/kg of 10% dextrose via IV over one minute, followed by continuous IV glucose infusion as per the doctor's orders.
  • If glucose is between 30–45 mg/dL without symptoms, feed the infant via oral or IV glucose as necessary.
  • Monitor blood glucose every 30–60 minutes until levels stabilize above 45 mg/dL consistently before stopping monitoring.

Neonatal Hyperglycemia (High Blood Glucose):

Defined as a blood glucose level above 125 mg/dL, leading to dehydration due to excessive urine output.

Causes:

  • High-concentration IV glucose administration, especially in infants <1000g birth weight
  • Administration of corticosteroids
  • Neonatal sepsis
  • Surgical procedures or painful interventions

Treatment:

  • Monitor glucose levels every 30 minutes until stabilized.
  • Adjust IV glucose infusion as per physician’s recommendations.