Do Not Administer Iron Carboxymaltose to This Patient
Iron supplementation is not indicated in a preoperative patient who is neither anemic nor iron deficient, regardless of their Jehovah's Witness status. The question fundamentally misunderstands the indication for preoperative iron therapy.
Why Iron Supplementation is Inappropriate Here
Iron therapy—whether oral or intravenous—is specifically indicated for treating iron deficiency (absolute or functional) and iron deficiency anemia. According to current expert consensus guidelines, ferric carboxymaltose (FCM) is used for conditions associated with "iron lack" 1. A patient without anemia or iron deficiency has no physiologic basis for iron supplementation.
The Evidence Base
Recent systematic review data confirms this principle:
- Preoperative iron in non-anemic patients: A 2025 meta-analysis of 1,162 non-anemic patients showed that preoperative iron supplementation reduced transfusion risk (OR 0.54), but these patients still had underlying iron deficiency despite normal hemoglobin 2
- Cardiac surgery trial: A 2024 RCT specifically tested prophylactic FCM 1000 mg in non-anemic cardiac surgery patients who met "prespecified iron blood test safety criteria" (implying some degree of iron depletion). The trial was stopped for futility—FCM provided no benefit for transfusion reduction or infection prevention 3
What This Means for Your Jehovah's Witness Patient
The Jehovah's Witness status is irrelevant to the iron dosing decision when the patient has:
- Normal hemoglobin (not anemic)
- Normal iron studies (no iron deficiency)
Appropriate Preoperative Management Instead
For Jehovah's Witness patients refusing blood products, the focus should be on:
Verify baseline status: Confirm hemoglobin ≥13 g/dL (men) or ≥12 g/dL (women), ferritin >50 ng/mL, and TSAT >20% 1
Surgical blood conservation techniques:
Reserve iron therapy for actual deficiency: If iron deficiency develops postoperatively, then FCM 1000 mg (or 750 mg × 2 in the US) would be appropriate 1
Critical Pitfall to Avoid
Do not prophylactically "load" patients with iron when they have normal iron stores. This approach:
- Lacks evidence for benefit 3
- Exposes patients to unnecessary risks (hypophosphatemia with FCM, infusion reactions)
- Wastes resources
- May cause iron overload
When Iron IS Indicated in Jehovah's Witnesses
The published case reports of successful Jehovah's Witness surgeries all involved patients with documented anemia or iron deficiency who received:
- FCM 500-1000 mg IV plus erythropoietin (EPO) to raise Hb from 10.8 to 17 g/dL over 9 weeks 5
- Iron supplementation with EPO for hip fracture patients with Hb 7.2 g/dL 6
- Blood augmentation protocols for anemic cancer patients (Hb 10.8 ± 2.0 g/dL) 7
None of these cases involved prophylactic iron in patients with normal baseline values.
The Bottom Line
No dose of iron carboxymaltose is appropriate for this patient. Document normal hemoglobin and iron studies, focus on surgical blood conservation techniques, and reserve iron therapy for treatment of actual deficiency if it develops perioperatively.