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Related Experiment Videos

Thymic size in preterm neonates: a sonographic study.

D L Jeppesen1, H Hasselbalch, S D Nielsen

  • 1Department of Paediatrics, Hvidovre Hospital, University of Copenhagen, Denmark. d.jeppesen@dadlnet.dk

Acta Paediatrica (Oslo, Norway : 1992)
|August 2, 2003
PubMed
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Thymic size in preterm infants can be measured using sonography. Thymic index (Ti) correlates with birthweight and gestational age, and inversely with infections, establishing a normal range for Ti.

Area of Science:

  • Neonatal Medicine
  • Pediatric Imaging
  • Immunology

Background:

  • The thymus plays a crucial role in immune system development.
  • Assessing thymic size in preterm neonates is important for understanding immune status.
  • In vivo assessment of thymic size in preterm infants is challenging.

Purpose of the Study:

  • To evaluate thymic size variations in preterm neonates using sonography.
  • To determine relationships between thymic size and gestational age, birthweight, and postnatal infections.
  • To explore associations between thymic size and maternal alcohol/tobacco use during pregnancy.

Main Methods:

  • Sonographic assessment of thymic size to calculate the thymic index (Ti).
  • Study included 80 preterm neonates (24-36 weeks gestational age).

Related Experiment Videos

  • Measurements taken between days 0-19 post-birth.

    • Main Results:

    • Thymic index (Ti) was successfully assessed via sonography.
    • Ti showed a positive correlation with birthweight and gestational age (GA).
    • Ti was negatively correlated with the occurrence of postnatal infections (p < 0.01).
    • No correlation found between thymic size and maternal alcohol or tobacco intake.

    Conclusions:

    • Sonography is a feasible method for assessing thymic size in preterm and very low-birthweight neonates.
    • A normal range for the thymic index (Ti) in preterm infants has been established.
    • The sonographic technique is safe and effective for measuring thymic size in this population.