Investigation in patients with an absolute erythrocytosis.
| Stage 1 . | Stage 2 . |
|---|---|
| CBC | Bone marrow aspirate/trephine |
| Arterial oxygen saturation | Marrow karyotype |
| Ferritin | BFU-E culture |
| B12 | Oxygen dissociation curve (p50) |
| Folate | Sleep study |
| Creatinine | Lung function tests |
| Liver function tests | Chest X-ray |
| Uric acid | Echocardiogram |
| Abdominal ultrasound | Erythropoietin receptor mutation analysis |
| Serum erythropoietin |
| Stage 1 . | Stage 2 . |
|---|---|
| CBC | Bone marrow aspirate/trephine |
| Arterial oxygen saturation | Marrow karyotype |
| Ferritin | BFU-E culture |
| B12 | Oxygen dissociation curve (p50) |
| Folate | Sleep study |
| Creatinine | Lung function tests |
| Liver function tests | Chest X-ray |
| Uric acid | Echocardiogram |
| Abdominal ultrasound | Erythropoietin receptor mutation analysis |
| Serum erythropoietin |