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ID:289 Prothrombin time (PT)
Search Links: General Info : Protocols : LabTestsOnline

DescriptionA coagulation screening test for the extrinsic and common pathways
IndicationPre-operative screening test or investigation of a clotting disorder
Additional InfoUsed to calculate the INR for control of warfarin therapy. Please note: test can only be added to samples within 24 hours of collection
Concurrent TestsCoagulation Screen
Dietary RequirementsNone
InterpretationInterpreted against a normal range

DepartmentHaematology
SampleBlood
TubeCoagulation
Tube Picture
Collection ConditionsAll coagulation tubes must be filled to the line.
Min. Vol
Freq.Daily

Ref. Range (Male)
Ref. Range (Female)
Ref. Range (Paed)
Ref. Range NotesCritical telephone values: PT greater than 20 seconds (with no obvious cause) will be phoned to the ward/clinical area. It the patient is on warfarin INR results greater than 5.0 should be phoned
Unitsseconds
IP Acute TATRefer to Website
IP Routine TATRefer to Website
GP Acute TAT- Contact Laboratory
GP Routine TATRefer to Website
Turnround Comment

Originally edited by : RJAR. Review due on 18/06/2019 10:38:01. Published By RJAR on 18/06/2018 10:38:01.