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Difficulty: MediumNeonatal Disorders

A term male infant (39 weeks gestation) is delivered via scheduled cesarean delivery for breech presentation to a 30-year-old primigravida. The mother had an uncomplicated pregnancy, and her group B Streptococcus screen was negative. Apgar scores are 8 and 9 at 1 and 5 minutes. At 2 hours of life, the infant develops a respiratory rate of 78/min and mild subcostal retractions. Vital signs show a temperature of 36.9°C (98.4°F), heart rate of 142/min, and blood pressure of 65/40 mmHg. Pulse oximetry reveals an oxygen saturation of 91% on room air. Physical examination shows a well-grown infant with clear breath sounds bilaterally. Multiple 1- to 2-mm, discrete, pearly-white papules are present on the nasal bridge. A chest radiograph demonstrates increased lung volumes, prominent perihilar streaking, and fluid within the interlobar fissures. Which of the following is the most appropriate next step in management of this patient?

  1. Provision of supportive care and supplemental oxygenAnswer
  2. B
    Empiric administration of intravenous ampicillin and gentamicin
  3. C
    Application of topical mupirocin to the facial lesions
  4. D
    Administration of inhaled albuterol
  5. E
    Administration of intravenous furosemide

Answer

Provision of supportive care and supplemental oxygen
The correct management for transient tachypnea of the newborn (TTN) is supportive care, which typically includes supplemental oxygen or continuous positive airway pressure (CPAP). TTN frequently occurs in term infants delivered via cesarean section without preceding labor, as they miss the normal catecholamine surge that triggers the resorption of fetal alveolar fluid. The retained fluid leads to tachypnea and increased work of breathing shortly after birth. A chest radiograph showing prominent perihilar streaking, increased lung volumes, and fluid in the interlobar fissures strongly supports this diagnosis. It is a self-limiting condition that usually resolves within 1 to 3 days as the fluid is gradually cleared by the pulmonary lymphatic system.

Step-by-Step Solution

1
Analyze the patient's presentation and risk factors.
The patient is a term infant delivered by scheduled cesarean section without labor, presenting with early-onset respiratory distress.
Identifying the mode of delivery (cesarean without labor) is critical, as it eliminates the normal physiologic catecholamine surge that aids in fetal lung fluid clearance.
2
Interpret the physical exam and diagnostic imaging findings.
The chest radiograph shows hyperinflation, perihilar streaking, and fluid in the fissures. The skin exam shows benign milia.
These radiographic findings are pathognomonic for transient tachypnea of the newborn (TTN). The absence of infiltrates or low lung volumes makes other diagnoses like pneumonia or respiratory distress syndrome highly unlikely.
3
Determine the optimal management strategy based on the diagnosis.
The most appropriate next step is providing supportive care, including oxygen supplementation or CPAP to maintain adequate saturation while the fluid is naturally reabsorbed.
TTN is a benign, self-limiting condition that resolves within 24 to 72 hours with appropriate supportive care.

Key Concept

Diagnosis and management of transient tachypnea of the newborn (TTN)
Estimated Time:1m 0s
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Topics

Neonatal Disorders

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