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Related Concept Videos

Pharmacokinetics in Pediatric Patients: Drug Distribution01:17

Pharmacokinetics in Pediatric Patients: Drug Distribution

231
Drug distribution in the pediatric population exhibits unique challenges and considerations due to the physiological differences between children, particularly neonates and infants, and adults. A crucial aspect of pediatric pharmacology is understanding how these differences impact the pharmacokinetics of various drugs, necessitating age-specific dosing strategies to ensure efficacy and safety.Neonates and infants have a higher total body water content, ~75%–90% of their body weight,...
231

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Related Experiment Video

Updated: Jan 6, 2026

Transcutaneous Microcirculatory Imaging in Preterm Neonates
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Complete blood count reference intervals for extremely preterm neonates.

Christina H Wolfsberger1,2, Benedikt N Seidel3,4, Linda Fleck5

  • 1Department of Pediatrics and Adolescent Medicine, Division of Neonatology, Medical University of Graz, Graz, Austria. christina.wolfsberger@medunigraz.at.

European Journal of Pediatrics
|October 18, 2025
PubMed
Summary
This summary is machine-generated.

This study establishes crucial reference intervals for complete blood counts in preterm infants during their first five days of life. These findings aid clinicians in interpreting neonatal hematological profiles and identifying deviations in growth-restricted infants.

Keywords:
Centile chartsComplete blood counts (CBC)Full blood counts (FBC)LymphocytesNewborn infantNormal rangePreterm infantReference intervals

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Area of Science:

  • Neonatal Hematology
  • Pediatric Clinical Chemistry

Background:

  • Preterm infants have dynamic hematological profiles in early postnatal life.
  • Accurate reference intervals are essential for interpreting complete blood counts (CBC) in neonates.

Purpose of the Study:

  • To establish comprehensive reference intervals for CBC parameters in preterm neonates within the first five postnatal days.
  • To stratify these intervals by gestational age and postnatal age.
  • To compare hematological parameters between appropriate-for-gestational age (AGA) and small-for-gestational age (SGA) neonates.

Main Methods:

  • Analysis of CBC data from 3128 preterm neonates (23.0-34.0 weeks gestation) admitted to a neonatal intensive care unit.
  • Generation of percentile-based reference intervals (2.5th, 10th, 50th, 90th, 97.5th) for leukocytes, thrombocytes, hemoglobin, hematocrit, neutrophilic granulocytes, and lymphocytes.
  • Application of stringent exclusion criteria and comparison between AGA and SGA neonates.

Main Results:

  • Reference intervals were established for key hematological parameters across different gestational and postnatal ages.
  • Significant differences were observed between AGA and SGA neonates, with SGA infants showing lower leukocytes, thrombocytes, and neutrophilic granulocytes.
  • Hemoglobin and hematocrit levels were generally similar between AGA and SGA groups, with minor variations at specific gestational ages.

Conclusions:

  • The study provides validated reference intervals for neonatal hematology, improving clinical interpretation of CBC results in preterm infants.
  • The established intervals facilitate the identification of hematological deviations.
  • Observed differences between AGA and SGA neonates highlight the impact of fetal growth restriction on neonatal hematopoiesis, warranting further investigation.