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Transepithelial electric potential difference in newborns undergoing phototherapy.
Pediatric Research
|March 1, 1987
Summary
Phototherapy for newborn jaundice may damage the duodenal mucosa barrier, increasing gut fluid secretion. This bilirubin-induced effect could explain phototherapy-associated diarrhea in infants.
Area of Science:
- Neonatal Medicine
- Gastroenterology
- Biochemistry
Background:
- Hyperbilirubinemia is common in newborns.
- Phototherapy is a standard treatment for neonatal jaundice.
- Diarrhea is a frequent side effect of phototherapy in infants.
Purpose of the Study:
- To investigate the effect of phototherapy on duodenal mucosa in hyperbilirubinemic newborns.
- To explore the potential role of bilirubin in damaging the intestinal barrier.
- To understand the mechanism behind phototherapy-induced diarrhea.
Main Methods:
- Measurement of transepithelial electric potential difference (TEPD) in duodenal mucosa.
- Analysis of nonconjugated bilirubin and photobilirubin levels in duodenal juice.
- Observation of hyperbilirubinemic newborns undergoing phototherapy.
Main Results:
- Phototherapy significantly decreased duodenal TEPD.
- Nonconjugated bilirubin and photobilirubin levels increased in duodenal juice.
- Evidence suggests bilirubin damages the duodenal mucosa barrier function.
Conclusions:
- Bilirubin may impair duodenal mucosa barrier function during phototherapy.
- Increased sodium and water secretion into the gut is a likely consequence.
- This mechanism may contribute to diarrhea observed in newborns undergoing phototherapy.