Critical Values - Hematology

If a critical is encountered during routine Hematology testing, the ordering physician is immediately contacted with the finding. If this occurs after regular office hours, the ordering physician (or physician on-call) will be contacted via answering service or at home. A Hematopathologist is notified and will provide a consultative service when required.

Test

Less Than

Greater Than

Comments

Hemoglobin (g/L) (Adult)

60 g/L

200 g/L

excluding newborns

Hematocrit (L/L)

0.15 L/L

0.70 L/L

Platelet count

20 x 109/L

1500 x 109/L

Lymphocytes

300 x 109/L

Granulocytes

0.5 x 109/L

100 x 109/L

PT (INR)

5.0

aPTT (seconds)

60 seconds

Fibrinogen (g/L)

1 g/L

Malaria

All

Blast Cells

5%

If a new finding

Schistocytes

 

2+

excluding neonates, chronic renal failure and hyposplenism

Sickle Cells

any

any

If a new finding

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