Packed cell volume (PCV), haematocrit (Hct)
Last updated: Friday, 30, April, 2004
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5 mL blood in EDTA tube.
2 mL in special paediatric EDTA tube.
Part of FBC.
Derived measurement (Hct) on automated, semi-automated instruments.
Direct measurement (PCV) by centrifugation.
| Reference Interval|
Some variation with method.
Infant: term-cord blood: 0.44-0.64
Adult female: 0.37-0.47
Assessment of anaemia and erythrocytosis.
Monitor haemodilution and haemoconcentration.
PCV is reduced in anaemia, increased in erythrocytosis.
In patients with erythrocytosis the PCV correlates with blood viscosity.
Dacie JV and Lewis SM. Practical Haematology. 8th ed. Churchill Livingstone 1995.