🔥 Inflammatory Marker Interpretation
Interpretation and common cut-offs for CRP/ESR, procalcitonin and ferritin — all non-specific and requiring clinical correlation. Browser-side reference.
Inflammatory Marker Interpretation
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When to use
Use the trend rather than single values; PCT supports antibiotic stewardship and ferritin doubles as an acute-phase reactant.
How it works
PCT: < 0.25 argues against bacterial (lower respiratory), > 0.5 possible sepsis, > 2 high-risk. CRP half-life ≈ 19 h.
Key points
- All inflammatory markers are non-specific.
- PCT supports stewardship but is not a standalone decision.
- Ferritin is both an iron-store marker and an acute-phase reactant — interpret with CRP/TSAT.
- Very high ferritin: consider adult Still disease or HLH (HScore).
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.