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Monocytosis in preterm infants.

V S Rajadurai1, H M Chambers, R Vigneswaran

  • 1Department of Neonatology, Queen Victoria Hospital, Adelaide, Australia.

Early Human Development
|March 1, 1992
PubMed
Summary
This summary is machine-generated.

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Sick preterm infants in intensive care often show high monocyte counts. This study found factors like lower birth weight, transfusions, and maternal steroid therapy are associated with this monocytosis.

Area of Science:

  • Neonatalogy
  • Hematology
  • Immunology

Background:

  • Monocytosis is frequently observed in sick preterm neonates requiring intensive care.
  • The underlying causes of this phenomenon have not been thoroughly investigated.

Purpose of the Study:

  • To investigate clinical factors associated with significant monocytosis in sick preterm neonates.
  • To differentiate between physiological responses and pathological conditions.

Main Methods:

  • Retrospective analysis of 587 neonates requiring intensive care.
  • Comparison of clinical variables between 30 neonates with monocytosis (absolute monocyte count > 1700/mm3) and 37 controls.
  • Analysis included gestational age, birth weight, and various clinical interventions.

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Main Results:

  • Neonate group with monocytosis had lower mean birth weight and gestational age (29 weeks).
  • Higher incidence of leukocytosis, multiple transfusions, albumin infusions, and theophylline therapy observed in the monocytosis group.
  • An unexpected association was found with maternal steroid therapy; no significant difference in infection or antibiotic use.

Conclusions:

  • Monocytosis in sick preterm neonates may represent an immature physiological response to exogenous stimuli.
  • Factors such as low birth weight, prematurity, transfusions, and maternal steroid exposure are associated with monocytosis.
  • Further research is needed to fully understand the implications of monocytosis in this population.