Related Experiment Videos
Effects of phototherapy on serum unbound bilirubin i icteric newborn infants
Insights
Phototherapy significantly reduces unbound bilirubin in infants with hyperbilirubinemia. This treatment effectively lowers both unbound and total bilirubin levels in preterm and full-term newborns.
Area of Science:
- Neonatal Medicine
- Pediatric Gastroenterology
- Phototherapy Research
Background:
- Hyperbilirubinemia is a common condition in newborns.
- Unbound bilirubin is considered the toxic fraction responsible for kernicterus.
- Phototherapy is a standard treatment for neonatal jaundice.
Purpose of the Study:
- To evaluate the impact of phototherapy on serum unbound bilirubin levels.
- To compare the reduction in unbound versus total bilirubin.
- To assess phototherapy's efficacy in both preterm and full-term infants.
Main Methods:
- Assayed serum samples from 39 preterm and 35 full-term infants.
- Measured unbound bilirubin using the peroxidase oxidation method.
- Monitored bilirubin levels at 24 and 48 hours during continuous phototherapy.
Main Results:
- Statistically significant declines in serum unbound bilirubin were observed.
- Both unbound/total bilirubin ratios and absolute levels decreased significantly.
- Reductions were noted in both preterm and full-term infant groups.
Conclusions:
- Phototherapy effectively reduces serum unbound bilirubin in infants.
- The decline in unbound bilirubin is more pronounced than the decline in total bilirubin.
- Phototherapy is a crucial intervention for managing hyperbilirubinemia in neonates.
Abstract:
Sera from 39 preterm and 35 full-term infants with hyperbilirubinemia, undergoing phototherapy continuously for 48 h, were assayed for unbound bilirubin by the peroxidase oxidation method. Assessment was done to determine the influence of therapeutic exposure to light on the serum unbound bilirubin concentrations in preterm and full-term infants. At 24 and 48 h after initiation of phototherapy, the unbound/total bilirubin ratios, as well, as the serum total and unbound bilirubin levels showed statistically significant declines of values in both preterm and full-term infants. It is concluded that, following phototherapy, the serum levels of unbound bilirubin decline more conspicuously than the decrease in serum total bilirubin levels.