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Department of Haematology

Notes

  • The number of immature red cells in the peripheral blood reflects the amount of erythropoietic activity
  • Test performed at CGH and GRH.
  • See also: Full Blood Count

Sample Requirements

2ml or 4ml EDTA sample.

EDTA with cap

One sample is sufficient for a Full Blood Count plus Reticulocytes

Turnaround Time

  • Urgent: 60 minutes
  • Routine: 2 hours

Sample Storage and Retention

  • Pre analysis storage: do not store, send to laboratory within 4 hours.
  • Sample retention by lab: EDTA samples are retained for a minimum of 48 hours at 2-10°C.

This test can be added on to a previous request as long as there is sufficient sample remaining and the sample is less than 48 hours old.

Reference Ranges

Range Units
Adults and Children 0.2 - 2.0 %
Neonates (Full Term) 2.0 - 6.0 %