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Related Experiment Videos

Complement activation during prolonged extracorporeal membrane oxygenation.

S H Westfall1, C Stephens, K Kesler

  • 1Department of Surgery, St. Louis University School of Medicine, Mo.

Surgery
|November 11, 1991
PubMed
Summary
This summary is machine-generated.

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Steroids given during extracorporeal membrane oxygenation (ECMO) to newborns with respiratory failure paradoxically increased complement activation but shortened ECMO and ventilator durations. Survival was not affected.

Area of Science:

  • Neonatal Medicine
  • Immunology
  • Critical Care

Background:

  • Cardiopulmonary bypass activates the complement system, potentially causing pulmonary dysfunction.
  • The impact of prolonged extracorporeal membrane oxygenation (ECMO) on complement activation in newborns is unknown.
  • Steroids may inhibit complement-mediated pulmonary damage.

Purpose of the Study:

  • To investigate the effects of ECMO on complement activation in newborn infants.
  • To determine if steroid administration influences complement activation and clinical outcomes during ECMO.

Main Methods:

  • Twenty-one neonates with respiratory failure receiving ECMO were randomized to receive methylprednisolone (steroids) or no steroids.
  • Complement activation was assessed by measuring C3 and C5 levels before and during ECMO.

Related Experiment Videos

  • Clinical outcomes including survival, ECMO duration, ventilator time, and hospitalization duration were compared between groups.

    • Main Results:

    • ECMO induced complement activation, indicated by declining C3 and C5 levels.
    • Steroid administration led to earlier and enhanced complement activation (C3 and C5 depletion).
    • Steroids significantly reduced ECMO duration and post-ECMO ventilator time, but did not impact survival or total hospitalization.

    Conclusions:

    • Complement activation occurs during neonatal ECMO.
    • Steroid administration paradoxically enhances early complement activation but shortens ECMO and ventilator support duration.
    • The benefits of steroids in this context may involve mechanisms beyond direct complement inhibition.