From: Iron supplementation in the intensive care unit: when, how much, and by what route?
Parameter (units) | ACD | Iron deficiency | Normal |
---|---|---|---|
Serum ferritin (μg/l) | >50 | <50 | 15–300 |
Serum iron (μg/dl) | <30 | <30 | 50–150 |
TIBC (μmol/l) | Normal | Elevated | 47–70 |
% Saturation | >20% | <15% | 16–40% |
RBC zinc protoporphyrin (μg/dl) | <1.24 | >1.24 | <70 |
Erythropoietin level (mU/ml) | Normal (inappropriately low) | Elevated | 4–28 |
STfR (mg/l) | Normal | Elevated | 2.8–8.5 |
TfR-F index | Low (<1) | High (>4) | 1–4 |