HOMOCYSTEINE, QUANTITATIVE, PLASMA

Specimen Required
Draw blood in a lavender EDTA tube. Separate plasma from cells within 60 minutes of collection and send 2.0 mL plasma (0.5 mL minimum) frozen in a screw-capped plastic vial.

Alternate Specimen
Plasma: Lithium heparin

Rejection Criteria
Grossly lipemic, Grossly hemolyzed specimens

Methodology
Chemiluminescence

Stability
Room Temperature: Unacceptable; Refrigerated: 2 days; Frozen: 14 days

Reference Range
4-14 µmol/L

Performed
Monday-Friday

Turnaround Time3 days
Test CodeHCY
CPT-4 Code (s)
83090
LOINC Codes
13965-9

Warde
Medical
Laboratory