Warfarin Quant (Coumadin) Build info

Synonyms

• WARFARIN QUANT (COUMADIN)
• Jantoven
• Panwarfarin
• LAB11086

Procedure Name

WARFARIN QUANT (COUMADIN)

Procedure Master Number

LAB11086

Cerner Name

Procedure ID

114568

Clinical Info

Monitoring Levels

Specimen Sources

Specimen Types

Container

Lavender-top (EDTA) tube(s)

Collection Instructions

Container/Tube: Lavender Top Tube
Specimen: 1 mL of EDTA plasma (0.2 mL min)
Transport Temperature: Refrigerate
Specimen Preparation: Separate from Cells ADAP or within 2 hours of collection

Alternative Specimen(s) Serum collected in red-top (no gel)

Specimen Volume

1 mL of EDTA plasma

Transport Instructions

Refrigerate

Specimen Stability

30 Days Room Temperature
30 Days Refrigerated
15 Months Frozen

Methodology

Quantitative High Performance Liquid Chromatography-Tandem Mass Spectrometr

Days Performed

TAT: 9-12 Days

Performing Laboratory

ARUP
Sent to NMS Labs, Inc.

CPT

80375
LOINC Code; 4098-0

PDM

Only Orderable at Locations:

Results

Result Interpretation

Reporting Limit: 0.40 mcg/mL

The dosage of warfarin is best adjusted based on the
International Normalized Ratio (INR) for prothrombin
time. Peak plasma concentrations following single
10 mg doses averaged 0.6 mcg/mL for both R-warfarin
and S-warfarin (combined concentration 1.2 mcg/mL).
This test is not chiral specific and does not
distinguish between the R and S enantiomers of
warfarin. The blood to plasma ratio is
approximately 0.5.

Forms