Hematology Equation Limited evidence Clinical review pending v1.0.0

Iron Deficit — Ganzoni Formula

How much parenteral iron does this patient need?

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About this tool

Total body iron deficit from weight, current and target haemoglobin, and iron stores.

Intended use

Adults with iron-deficiency anaemia being considered for intravenous iron.

Outcome

Iron deficit (mg)

Time horizon

Point in time

Limitations

Product labels for modern IV iron often use simplified dosing tables.
Ongoing blood loss is not captured.

Clinical problems

Cytopenias and thrombosis

Evidence

Evidence level

Limited evidence

Derivation and limited validation only, or significant known calibration problems. Methodology

Evidence summaries for this tool are awaiting independent clinical review. Statistics are shown only where they could be attributed to a specific publication.

References

Original publicationGanzoni AM. Intravenous iron-dextran: therapeutic and experimental possibilities. Schweiz Med Wochenschr 1970;100:301-303. Find on PubMed (opens in a new tab)

Version history

Version	Formula	Effective	Reviewer	Changes
v1.0.0	Ganzoni 1970	2026-10-03	—	Initial implementation with reference test vectors.

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Clinical decision support only. Interpret results in the context of the individual patient and current guidance; HumanPulse does not replace professional medical judgment.