Related Experiment Video
Updated: Mar 18, 2026

Transcutaneous Microcirculatory Imaging in Preterm Neonates
Published on: December 31, 2015
Transcutaneous Bilirubin Levels during the First Month of Life in Term and Late-preterm Newborns
Serdar Umit Sarici1, Omer Gunes2, Esad Koklu3
1Division of Neonatology, Department of Pediatrics, Gulhane Military Medical Academy, Ankara-06018, Turkey.
Insights
This study developed a transcutaneous bilirubin (TcB) nomogram for Turkish newborns to assess risks of jaundice. The nomogram helps predict significant hyperbilirubinemia and prolonged jaundice in the first month of life.
Area of Science:
- Neonatal Medicine
- Pediatrics
- Medical Diagnostics
Background:
- Hyperbilirubinemia is common in newborns, posing risks of significant jaundice.
- Accurate risk assessment is crucial for timely intervention in term and late-preterm infants.
- Existing nomograms may not be population-specific, necessitating localized data.
Purpose of the Study:
- To develop a transcutaneous bilirubin (TcB) nomogram tailored for Turkish newborns.
- To assess the risk of significant hyperbilirubinemia and prolonged jaundice in the first month of life.
- To provide a tool for clinicians to manage neonatal jaundice effectively.
Main Methods:
- Developed a nomogram based on daily transcutaneous bilirubin (TcB) measurements at 3, 7, 15, and 30 days.
- Utilized a transcutaneous bilirubinometer (JaundiceDetector JH20-1C) for measurements.
- Analyzed data from 729 healthy term and late-preterm Turkish infants aged 3-30 days.
Main Results:
- A TcB nomogram was successfully developed for Turkish infants.
- At 15 days, 41.98% of infants had TcB levels ≥5 mg/dl; at 30 days, 25.9% did.
- The 97th percentile cutoff values were 11.4 mg/dl at 15 days and 10.0 mg/dl at 30 days.
Conclusions:
- The developed TcB nomogram is a valuable tool for risk assessment in Turkish newborns.
- It aids in identifying infants at risk for significant hyperbilirubinemia and prolonged jaundice.
- The nomogram facilitates evidence-based clinical decision-making for neonatal jaundice management.
Objective:
We aimed to develop a transcutaneous bilirubin (TcB) nomogram for assessment of the risk of significant hyperbilirubinemia and prolonged jaundice during the first month of life in term and late-preterm Turkish newborns.
Methods:
On the basis of the daily (3rd, 7th, 15th and 30th days) TcB measurements, 3rd, 10th, 25th, 50th, 75th, 90th and 97th percentiles, and 5 percentile tracks were obtained. TcB measurements were made by a transcutaneous bilirubinometer (JaundiceDetector JH20-1C).
Results:
We screened 729 healthy term and late-preterm Turkish infants 3-30 days old and developed a nomogram of TcB levels. TcB level was ≥5 mg/dl in 41.98% and 25.9% of infants at age 15.0 ± 2.1 days and 30.9 ± 2.6 days, respectively. The TcB measurement-based nomogram values of the 97th percentiles (cutoff values) at age 15.0 ± 2.1 and 30.9 ± 2.6 days were 11.4 (10.82-12.13) mg/dl and 10.0 (9.40-10.70) mg/dl, respectively.
Conclusion:
This nomogram can be used to determine the risk status of Turkish newborns regarding significant hyperbilirubinemia and prolonged jaundice on the basis of TcB measurement in the first month of life.
Related Concept Videos
Pharmacokinetics in Pediatric Patients: Drug Metabolism
Development of Immunocompetence
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
Pharmacokinetics in Pediatric Patients: Overview and Drug Absorption
Transcytosis of IgG
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
Pharmacokinetics in Pediatric Patients: Drug Distribution

