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Updated: May 7, 2025

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Preoperative iron therapy: Where are we?

Beth MacLean1, Angela Weyand2, Jayne Lim1

  • 1School of Medicine, The University of Western Australia, Perth, Western Australia, Australia.

Best Practice & Research. Clinical Anaesthesiology
|January 7, 2025
PubMed
Summary
This summary is machine-generated.

Preoperative anemia impacts surgical patients, and while iron deficiency is common, evidence does not support routine intravenous iron therapy for improving outcomes. Further research is needed on iron deficiency anemia management in surgical settings.

Keywords:
AnemiaBloodIronIron deficienciesSurgery

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Area of Science:

  • Anesthesiology
  • Hematology
  • Surgical Outcomes

Background:

  • Preoperative anemia affects a third of major surgery patients, worsening outcomes like hospital stay, transfusion needs, morbidity, and mortality.
  • Iron deficiency is the primary cause of anemia, with potential benefits suggested for preoperative correction.
  • Randomized controlled trials (RCTs) data currently do not support routine iron therapy for preoperative anemia.

Purpose of the Study:

  • To review large RCTs on the efficacy of preoperative intravenous iron.
  • To discuss the observed effects of intravenous iron on hemoglobin levels and patient benefits.
  • To address the feasibility of preoperative intravenous iron and highlight research needs for iron deficiency anemia in surgical patients.

Main Methods:

  • Literature review of large randomized controlled trials (RCTs).
  • Analysis of studies examining preoperative intravenous iron administration.
  • Discussion of existing data on hemoglobin concentration and patient outcomes.

Main Results:

  • Preoperative intravenous iron can increase hemoglobin levels in specific surgical patient groups.
  • The data do not conclusively demonstrate a direct clinical benefit to patients from this intervention.
  • The routine use of iron therapy for preoperative anemia is not supported by current RCT evidence.

Conclusions:

  • While preoperative intravenous iron may raise hemoglobin, its clinical benefit in surgical patients remains unclear.
  • Preoperative intravenous iron administration may not be a universally feasible or effective strategy.
  • Further investigation into the mechanisms and optimal management of iron deficiency anemia in surgical patients is warranted.