NameA.P.T.T. (Activated Partial Thromboplastin Time)
Tube TypeBlue (Sodium Citrate)
Reporting UnitsSeconds
Reference RangeAPTTR: 0.84 -1.16
AvailabilityNDDH (24/7)
Target turnaround time2 hours
Special requirements & notes
Patient preparationN/A
Volume required1 tube (2.7ml) must be full
If delayed transport to lab, store:In refrigerator 2 – 8oC
Factors affecting result interpretationClotted sample, underfilled samples, anticoagulants
Time limit for add on test4 Hrs
Pathology disciplineHaematology
‘Lab Tests Online’ linkhttps://labtestsonline.org.uk/tests/aptt

Last updated: November 23, 2022