INR

Message

HEMATOLOGY/COAG WRJ

Test Code

INR

Preferred Specimen

PLASMA

Minimum Volume

2.7mLs

Instructions

DRAW 1 NA CITRATE(LIGHT BLUE) TOP TUBE, SPIN DOWN AND SEND TO LAB.*** MUST BE AT FILLED TO THE LINE OR A REDRAW IS REQUIRED.

Transport Container

ORIGINAL TUBE

Transport Temperature

REFRIGERATED

Specimen Stability

Samples good for 24hrs from time of collection in an unopened tube at room temperature. Since storage at refrigerated temps may result in cold activation of factor VII, blue tops when being transported should not be placed directly on ice packs or ice.

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

NOT 90% FILLED

Methodology
Photo-optical endpoint/calculation

Setup Schedule

DAILY

Report Available

DAILY

Limitations

INR only pertains to those patients on oral anticoagulants.
Monitor Warfarin patients based on the INR value only.

Reference Range

Test Reference range
Prothrombin Time (PT) 9.8-13.3 sec
INR Therapeutic range 2.0-3.5

Clinical Significance

Screening test for abnormalities of coagulation factors that are involved in the extrinsic pathway. Also used to monitor effects of Warfarin therapy and to study patients with hereditary and acquired clotting disorders.

Performing Laboratory
WHITE RIVER JUNCTION VT VA- HEMATOLOGY/COAG 802-295-9363 EXT: 5521, 5523

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.