Vitamin K1, Serum VITK1
|Method(s)||High Performance Liquid Chromatography|
One 6 mL plain red or one gold (SST) top tube. Also acceptable: lavender (EDTA) or pink (K2EDTA) top tubes.
1 mL serum or plasma, frozen in an amber standardized transport tube. (Min: 0.6 mL) PROTECT FROM LIGHT
|Stability||After separation from cells: Ambient: Unacceptable; Refrigerated: 1 month; Frozen: 6 months|
|Notes||Draw sample following an overnight (12-hour) fast. Patient should not consume alcohol for one day prior to blood draw. Avoid hemolysis. Protect from light. Separate samples must be submitted when multiple tests are ordered. PROTECT FROM LIGHT during collection, storage and shipment.|
|Preferred Specimen Collection Device(s)|