Prothrombin time (PT)

Test/Investigation

Prothrombin time (PT)

Site(s) or Laboratory offering Test/Investigation

JPUH, NNUH, QEH

Units

seconds

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

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

1hour/4 hours/8 hours

Reference intervals (adult unless stated)

0-014 days 12-23.5
015-029 days 9.5-12.6
030-175 days 9.7-12.8
176-365 days 9.8-13
1-5 years 9.9-13.4
6-10 years 10-14.6
11-17 years 10-14.1
18-999 years 9.8-13.1

If UKAS Accredited Test indicate at which site

Y NNUH, QEH