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Laboratory Test Reference Guide

Laboratory Information

Test Name

Complete blood count


Full Blood Examination
Full blood count
Differential count
Diff count
IG count
Immature Granulocytes
Platelet F
Fluorescent Platelet
Blood film
Peripheral Blood film

External Price (excl. GST)


Constituent Tests

Specimen Collection

Adult Specimen

3 mL EDTA tube

Paediatric Specimen

300 uL EDTA microtainer.

Instructions for Referral to Waikato Lab

Aliquot Transport

Send at 4°C

Test Information



Test Availability

Mon - Sun, 24hrs

Laboratory Turnaround Time

2 hours for automated count


Sysmex XN Analyser

Reference interval

See below:

Reference interval Attachments

Diagnostic Use Or Instructions

Don’t perform repetitive CBC and chemistry testing in the face of clinical and lab stability.

Don’t request daily full blood counts, erythrocyte sedimentation rate (ESR) or C-reactive protein (CRP) as measures of response to antibiotics if patients are clinically improving.

Additional Information

Complete blood count includes a white cell differential except when ‘CBC without differential/film’ is requested for neonates.
Blood film appraisal of WBC, RBC and platelets is undertaken as required.

The white cell differential includes an Immature Granulocytes (IG) fraction which includes promyelocytes, myelocytes and metamyelocytes.
It does not include blast or band forms.  Immature granulocytes are not usually detected in healthy individuals, but may be increased in infection, inflammation, stress, haematological or other malignancies, steroid use, pregnancy and other conditions where there is a leucoerythroblastic picture.

Add-on test: within 24 hours after collection

Minimum Volume

Adult tube (3mL EDTA):  minimum 1 mL

Pediatric EDTA tube:  minimum 250 uL

Electronic Information

Registration Code


HL7 mapping code