Hemodynamics, fluids & transfusion

Longitudinal changes in haemoglobin, iron stores, and inflammatory markers following surgery and in critical illness: an analysis from the Practical Anaemia Bundle for Sustained Blood Recovery randomised clinical trial

Br J AnaesthPublished Secondary analysis of a randomised clinical trial

Authors' conclusion

Intravenous iron increases haemoglobin and ferritin concentrations through 3 months following critical illness.

Study context

Population
Critically ill adults with haemoglobin <10 g dl-1
Participants
100 adults
Comparison
i.v. iron vs standard care
  • Interventionn = 49
  • Standard caren = 51reference
Primary endpoint
Longitudinal haemoglobin, iron assays, erythropoietin and inflammatory markers (between-group differences)
Follow-up
1 and 3 months post-hospitalisation
Methodological detailsplanned analysis
  • Planned analysis

Primary result

As reported in the abstract

Intervention vs Standard careAdjusted mean difference, g dl-1 (95% CI)P value
Haemoglobin at 1 month
0.69(0.13–1.25)
P = 0.015
Intervention vs Standard careMultiple increase, ng/ml (95% CI)P value
Ferritin at 1 month
2.7(1.9–3.9)
P < 0.001

Further findings

Correlations between laboratory values

Ferritin and transferrin saturation, but not soluble transferrin receptor, correlated with inflammatory markers
Inflammatory markers correlated positively with erythropoietin and negatively with haemoglobin

Haemoglobin response to i.v. iron by baseline parameters (interaction analyses)

Soluble transferrin receptor-log ferritin index ≥1.5 identified patients likely to have greatest haemoglobin response

Original publication

Longitudinal changes in haemoglobin, iron stores, and inflammatory markers following surgery and in critical illness: an analysis from the Practical Anaemia Bundle for Sustained Blood Recovery randomised clinical trial. Br J Anaesth. Published 8 December 2025. doi:10.1016/j.bja.2025.09.060

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