Warfarin, Serum or Plasma

Alphabetical Test listing

Warfarin, Serum or Plasma-994

Test name:

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Alternate names:

Coumadin
Jantoven
Sodium Warfarin

Specimen type:

Serum

Collection container:

Red serum vial/tube - 5 mL

Volume:

2.0 mL

Minimum volume:

0.6 mL

Collection instructions:

Immediately after collection, mix tube thoroughly by gentle inversion, 8 - 10 times, to prevent clotting

Processing instructions:

Allow sample to clot
Spin within two (2) hours of sample collection
Transfer serum to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as serum

Transport container:

Transfer vial/tube with cap - 12mL (LabCorp)

Alternate specimen type:

EDTA plasma

Alternate collection container:

Lavender (EDTA), 4mL

Alternate collection instructions:

Immediately after collection, mix tube thoroughly by gentle inversion, 8 - 10 times, to prevent clotting

Alternate processing instructions:

Spin within two (2) hours of sample collection
Transfer plasma to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as plasma

Transport and stability:

Ambient (preferred) - 30 days

Refrigerated - 30 days

Frozen - 15 months

Reason for rejection:

Gel-barrier tube

Performing lab:

NMS (4800SP) via LabCorp (832122): R-NX

Days set up:

Mo - Fr

TAT:

8 days

Method:

High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS)

Reference ranges:

mcg/mL

Reporting Limit 0.2 mcg/mL

CPT codes:

G0480

LOINC code:

Result 4098-0

Date created:

05/22/2019

Revised date:

08/25/2023

Review date:

08/25/2023