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Updated: Aug 25, 2026

Intravenous Injections in Neonatal Mice
05:17

Intravenous Injections in Neonatal Mice

Published on: November 11, 2014

[Erythropoietin administration to preterm infants: comparison between subcutaneous and intravenous route]

V Rigourd1, F Kieffer, M A Dommergues

  • 1Service de réanimation néonatale, institut de puériculture et de périnatalogie, 26, boulevard Brune, 75014 Paris, France. ipp.rigourd@free.fr

Archives De Pediatrie : Organe Officiel De La Societe Francaise De Pediatrie
|March 31, 2004
PubMed

Insights

Subcutaneous recombinant human erythropoietin (rHuEpo) significantly reduces transfusions in preterm infants compared to intravenous routes. This finding supports subcutaneous administration for treating anemia of prematurity.

Area of Science:

  • Neonatal Medicine
  • Hematology
  • Pharmacology

Background:

  • Anemia of prematurity is a common complication in preterm infants.
  • Recombinant human erythropoietin (rHuEpo) is used to stimulate red blood cell production.
  • The optimal administration route for rHuEpo in preterm infants remains debated.

Purpose of the Study:

  • To compare the effectiveness of one-month rHuEpo treatment based on administration route.
  • To evaluate the impact of subcutaneous, continuous infusion, and direct intravenous rHuEpo on hematological parameters and transfusion needs.

Main Methods:

  • Retrospective study of 64 preterm infants.
  • Three groups received weekly rHuEpo: subcutaneous injections (750 IU/kg), continuous infusion in TPN (1050 IU/kg), or direct intravenous injections (750 IU/kg).
  • Effectiveness assessed by reticulocyte count, hemoglobin levels, and blood transfusion incidence.

Main Results:

  • Subcutaneous rHuEpo resulted in significantly higher hemoglobin levels (10.3 g/dl) and reticulocyte counts (216,000/mm3) compared to continuous infusion (8.8 g/dl, 123,000/mm3) and intravenous routes (9.6 g/dl, 190,000/mm3).
  • The incidence of blood transfusions was significantly lower with subcutaneous administration (21.2%) versus continuous infusion (40%) and intravenous routes (75%).
  • Ferritin levels and phlebotomy losses did not differ significantly between groups.

Conclusions:

  • Subcutaneous administration of rHuEpo is more effective in reducing transfusion requirements in preterm infants compared to intravenous routes.
  • The study recommends subcutaneous rHuEpo (250 IU/kg three times weekly) for treating anemia of prematurity pending further research.
  • Further studies and new molecules are needed to optimize anemia treatment in preterm infants.
Abstract

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