Test directory: Vitamin K

Ordering Code 4320
Test Name Vitamin K
Alias Phylloquinone
Vitamin K1
Preferred Specimen Plasma
Preferred Container EDTA, K2 (Lavender)
Other Specimen/Container Plasma in Lithium Heparin (Green),
Plasma in Sodium Heparin (Green), Serum in SST (Gold)
Optimum Volume 1.5 mL
Collection Instructions Fasting for a minimum of 8 hours required. Patient should refrain from eating liver and taking multivitamins or vitamin K at least 24 hours before sample collection.
Handling Instructions Centrifuge within 1 hour of collection. Immediately separate plasma or serum from the cells into an amber transport tube to protect from light. Freeze. Do not thaw. Samples received frozen but not protected from light are acceptable
Specimen is forwarded to another lab for testing; do not share with other tests.
Transport Requirements Oahu: Frozen
Airline: Frozen
Specimen Stability Ambient: 24 Hours
Refrigerated: 24 Hours
Frozen: 3 Months
Rejection Criteria Grossly hemolyzed, Grossly lipemic, Received ambient or refrigerated
Avail. Stat NO
Analytic Time 8 Days
Methodology Chromatography/Mass Spectrometry
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of June 14, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Vitamin K ALL See report.