Activated Partial Thromboplastin Time

Test/Investigation

Activated Partial Thromboplastin Time

Site(s) or Laboratory offering Test/Investigation

JPUH, NNUH, QEH

Units

Seconds

Also Known as/Frequency of Test

APTT

Comments/Precautions

Routine coagulation test

Ideal sample age for accurate results/Maximum acceptable sample age (at the time of analysis)

Within 8 hours/24 hours

Sample type

Citrate x 2

Turnaround times (TAT) Urgent/Routine/GP or OPD

1 hour/4 hours/8 hours

Reference intervals (adult unless stated)

0-014 days 35-52
015-029 days 27.6-45.6
030-175 days 24.8-40.7
176-365 days 25.1-40.7
1-5 years 24-39.2
6-10 years 26.9-38.7
11-17 years 24.6-38.4
18-999 years 24.1-38

If UKAS Accredited Test indicate at which site

Y NNUH