Citrate for APCR Assay.

MUST be venous or arterial collection, NOT capillary and delivered within 1 hr of collection 

Medical Notes:

APCR is a clot-based screening assay for Factor V Leiden Mutation G1691A. Decreased APCR

ratio suggests presence of Factor V Leiden mutation and should be confirmed by DNA Analysis.

See Factor V Leiden mutation G1691A genotyping . DNA analysis for Factor V Leiden is not

indicated if APCR ratios are within the normal range unless there is a strong family history of

Factor V Leiden mutation.

LAB NOTES: 

Add-On Tests - check with Haematology 

Weekly

For urgent testing, ring Haematology laboratory