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Test & Collection Guide

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Warfarin

Alternate names:
Serum Warfarin
Laboratory:
Coagulation
Specimen types:
Serum
Container types:
Plain Tube with gelPlain Tube with gel
Collection Instructions:

consult haematology registrar prior to sending sample.

Frequency:
Monthly
Result Turnaround Time:
8 weeks
Reference Interval:

1.2-2.6 ug/mL

Laboratory Use Only
Laboratory Notes:

This test may be useful for monitoring patients whose PT is inconsistent with the prescribed warfarin dose, particularly when failure to comply or surreptitious drug use is suspected.

Note:    This test is not designed for evaluation of the patient with prolonged  bleeding time suspected of exposure to rat poisons in that the assay is not designed to detect superwarfarins ( the result will likely be negative in this case - which in itself may only suggest superwarfarin ingestion as opposed to Warfarin  ). For superwarfarin testing - contact Victorian Forensic Institute.

 

External Laboratory:
St Vincents Hospital
 External Laboratory details...