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Pathology Departments Requesting & Reporting Blood Test Information Phlebotomy Guide Contact us
Blood Sciences

Blood Test Information

(a.k.a Activated partial thromboplastin time)
minimum sample volume required ~ 2.7ml

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Tube type: 9NC

Special instructions
Citrate sample must be received in lab within 4hours. Please note that the etched fill indicator on the plastic citrate tubes indicates the minimum acceptable blood volume required for analysis. Time limit for add on = <4 hours. Haemolysed samples should not be tested.
Interfering substances: Direct Oral Anticoagulants (DOACs)

Reference range
Normal Range: 25.1-36.5


Linked to
Clotting screen

Turnaround Time
6 hours

Department: Haematology

Clinical Application
Please note: for unfractionated heparin monitoring, the sample must be sent directly to the pathology laboratory for urgent processing.

» Paediatric normal ranges


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