From: Bench-to-bedside review: Iron metabolism in critically ill patients
Study | Time of measurement | Iron (μmol/l) | Ferritin (μg/l) | Transferrin saturation (%) | Transferrin (g/l) |
---|---|---|---|---|---|
< 9 | 30–200 | 10–20 | < 3 | ||
Surgical ICU patients [18] | Week 1 | 4.1 | 652 | 12.8 | 1.7 |
Week 2 | 4.1 | 1234 | 11.9 | 1.5 | |
Week 3 | 4.6 | 1536 | 13.4 | 1.4 | |
Week 4 | 6.9 | 1367 | 18.7 | 1.4 | |
Medical ICU patients ≥ 4 days [3] | Days 1–2 | 4.8a | 471a,b | 16a | 1.4a,c |
Days 6–8 | 6.0a | 767a,b | 15a | 1.3a,c | |
Days 13–15 | 6.5a | 795a,b | 22a | 1.3a,c | |
Days 20–25 | 8.1a | 774a,b | 24a | 1.4a,c | |
Days 31–40 | 7.8a | 723a,b | 20a | 1.5a,c | |
Medical and surgical ICU patients [19] | Days 2–3 | 4.9d | 727b | 16 | Not reported |
General ICU patients [21] | |||||
Functional iron deficiency | Day 1 | Not reported | 342 | Not reported | Not reported |
No functional iron deficiency | Day 1 | Not reported | 292 | Not reported | Not reported |
Multiple mechanical trauma patients [20] | Day 1 | 9.5 | 832 | Not reported | 1.7c |
Day 2 | 3.9 | 547 | Not reported | 1.7c | |
Day 4 | 3.4 | 466 | Not reported | 1.5c | |
Day 6 | 4.0 | 530 | Not reported | 1.6c | |
Day 9 | 5.0 | 842 | Not reported | 1.6c |