Northern Devon Healthcare NHS Trust > Pathology Laboratory Handbook > Departments > Haematology > Haematology Tests > APTT, A.P.T.T.

APTT, A.P.T.T.

Name	A.P.T.T. (Activated Partial Thromboplastin Time)
Tube Type	Blue (Sodium Citrate)
Reporting Units	Seconds
Reference Range	APTTR: 0.84 -1.16
Availability	NDDH (24/7)
Target turnaround time	2 hours
Special requirements & notes
Patient preparation	N/A
Volume required	1 tube (2.7ml) must be full
If delayed transport to lab, store:	In refrigerator 2 – 8^oC
Factors affecting result interpretation	Clotted sample, underfilled samples, anticoagulants
Time limit for add on test	4 Hrs
Pathology discipline	Haematology
‘Lab Tests Online’ link	https://labtestsonline.org.uk/tests/aptt

Last updated: November 23, 2022

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