Neonatal Screen, Blood

Overview
Department	Haematology
Test Code	NNS
Constituent Tests	Complete Blood Count, Differential and Film Reticulocytes
Synonyms	CBC   Differential   Film comment   Full Blood Count   Blood Count   FBC   Hb   Haemoglobin   WBC   Platelets
Base Lab Availability	Monday - Sunday, testing routinely available out of hours
Hawera Lab Availability	Monday - Friday 8 am - 5pm
Turnaround Time	15 min - 5 hrs
Stability – Add test	24 hours
Specimen Requirements
Specimen	Whole Blood
Preferred
Acceptable
Unacceptable	Clotted samples Samples older than 6 hours
Specimen Transportation
Paediatric Requirements	250 µL EDTA Microtainer
Aliquot Requirements
Sample
Preferred Volume
Minimum Volume
Aliquot Transportation
Clinical Information
Reference Intervals	Paediatric ranges available from laboratory.
Test Method	Sysmex N2000
Advanced Notice	Not required
Patient Preparation	Not required
Comments
Includes CBC, manual white cell differential, and I/T ratio. Band Neutrophil count included in differential. The Report will indicate the absence or presence of Toxic granulation, Toxic vacuolation, and Dolhe bodies. I/T ratio is calculated as immature neutrophils/total neutrophil count.

Owner	Craig Mabbett (Mabbett1)
Last reviewed	12.09.2025
Next review	12.09.2026 (Overdue)