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Test Code PTSC Prothrombin Time (PT), Plasma


Necessary Information


Heparin or Coumadin therapy should be noted.



Specimen Required


Only orderable as part of a profile or reflex. For more information see:

ALUPP / Lupus Anticoagulant Profile, Plasma

ALBLD / Bleeding Diathesis Profile, Limited, Plasma

AATHR / Thrombophilia Profile, Plasma

APROL / Prolonged Clot Time Profile, Plasma

ADIC / Disseminated Intravascular Coagulation/Intravascular Coagulation and Fibrinolysis (DIC/ICF) Profile, Plasma


Useful For

Screening to identify a deficiency of one or more of the clotting factors of the extrinsic coagulation system (I, II, V, VII, X) due to hereditary deficiency or acquired conditions such as liver disease, vitamin K deficiency, or a specific factor inhibitor

 

Monitoring patients on oral anticoagulant therapy to maintain a patient in a safe therapeutic range

Method Name

Only orderable as part of a profile or reflex. For more information see:

ALUPP / Lupus Anticoagulant Profile, Plasma

ALBLD / Bleeding Diathesis Profile, Limited, Plasma

AATHR / Thrombophilia Profile, Plasma

APROL / Prolonged Clot Time Profile, Plasma

ADIC / Disseminated Intravascular Coagulation/Intravascular Coagulation and Fibrinolysis (DIC/ICF) Profile, Plasma

 

Optical Clot-Based

Reporting Name

Prothrombin Time (PT), P

Specimen Type

Plasma Na Cit

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma Na Cit Frozen 14 days

Reference Values

Only orderable as part of a profile or reflex. For more information see:

ALUPP / Lupus Anticoagulant Profile, Plasma

ALBLD / Bleeding Diathesis Profile, Limited, Plasma

AATHR / Thrombophilia Profile, Plasma

APROL / Prolonged Clot Time Profile, Plasma

ADIC / Disseminated Intravascular Coagulation/Intravascular Coagulation and Fibrinolysis (DIC/ICF) Profile, Plasma 

 

PROTHROMBIN TIME

9.4-12.5 seconds

 

INTERNATIONAL NORMALIZED RATIO (INR)

0.9-1.1 

Standard intensity warfarin therapeutic range: 2.0-3.0

High intensity warfarin therapeutic range: 2.5-3.5

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

85610

LOINC Code Information

Test ID Test Order Name Order LOINC Value
PTSC Prothrombin Time (PT), P 34528-0

 

Result ID Test Result Name Result LOINC Value
PTSEC Prothrombin Time (PT), P 5902-2
INRSC INR 6301-6