Test Code PT/INR INR

ASTM/HL7/SDF 1

SQ Code=APTHR

Epic Code=LAB320

Specimen Requirements

Na Citrate/Blue tube-Invert 3-4 times after drawing

Specimen Transport Temperature

Whole Blood Room Temp

Reference Values

0.9-1.1

Critical Values: >4.9

Specimen stability/Retention time

24 hours

Specimen Rejection

Citrate tubes for PT testing that have been on ice
Clotted specimens
Hemolyzed specimens
Citrate tubes filled < 90% or > 110%

Instrument

Stago