Minimum and maximum criteria that laboratories use when determining if a blood film is required for a previously unknown adult patient
| Minimum range (median) | Consensus guideline minimum4 | Maximum range (median) | Consensus guideline maximum4 | |
|---|---|---|---|---|
| Hb, haemoglobin; MCV, mean corpuscular volume; WBC, white blood cell count. | ||||
| Hb (g/dl; female) | 7 to 12 (10) | <7 | 15 to 20 (17) | 2 g/dl above reference range |
| Hb (g/dl; male) | 7 to 13.5 (10) | <7 | 15 to 20 (18) | 2 g/dl above reference range |
| WBC × 109/l | 2 to 4 (3) | <4 | 10 to 30 (20) | >30 |
| Platelets × 109/l | 10 to 150 (120) | <100 | 400 to 800 (600) | >1000 |
| Neutrophils × 109/l | 0.5 to 2.5 (1.5) | <1 | 7.5 to 30 (17.5) | >20 |
| Lymphocytes × 109/l | 0.1 to 1.5 (1) | – | 3.5 to 10 (4.5) | >7 |
| Monocytes × 109/l | – | – | 0.8 to 3 (1.5) | >1.5 |
| Eosinophils × 109/l | – | – | 0.4 to 5 (1.3) | >2.0 |
| Basophils × 109/l | – | – | 0.02 to 2.5 (0.35) | >0.05 |
| MCV (fl) | 60 to 80 (75) | <75 | 99 to 125 (101) | >105 |