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Remarkably delayed occurrence of normal surfactant composition in an extremely preterm infant
Toshihiko Nakamura1, Hiroshi Shimizu, Chiaki Nishitani
1Department of Pediatrics, National Organization Hospital, Nishi-Saitama Chuo National Hospital, Tokorozawa, Japan.
Extremely preterm infants may experience delayed lung surfactant development, even after multiple artificial surfactant treatments. This case highlights prolonged respiratory distress syndrome (RDS) recovery, requiring nearly three months for normal surfactant function.
Area of Science:
- Neonatology
- Pulmonary Medicine
- Biochemistry
Background:
- Respiratory Distress Syndrome (RDS) is common in extremely preterm infants.
- Artificial pulmonary surfactant is a standard treatment for RDS.
- Normal surfactant composition is crucial for lung function.
Observation:
- A male infant born at 26 weeks gestation required 15 doses of artificial pulmonary surfactant.
- The infant showed transient improvements after each surfactant dose.
- Analysis of tracheal aspirates revealed delayed presence of surfactant proteins SP-B and SP-C.
Findings:
- Surfactant proteins SP-A and SP-D were present by day 13.
- Surfactant proteins SP-B and SP-C were absent on day 13 but detected by day 36.
- The infant achieved normal surfactant function after nearly three months.
Implications:
- This case suggests a potential for significantly delayed surfactant maturation in some extremely preterm infants.
- Further research is needed to understand the mechanisms behind delayed surfactant protein development.
- Clinical management may need to consider prolonged surfactant replacement therapy or alternative strategies for such cases.
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