Red top or SST tube
2 mL serum
0.75 mL serum
Fasting specimen.
Patient should abstain from alcohol for 24 hours prior to specimen collection. Collect specimen in a red top (preferred) or SST tube from a fasting patient (12-hour fast). Centrifuge within 2 hours of collection, aliquot serum into a plastic vial and refrigerate.
Patient should abstain from alcohol for 24 hours prior to specimen collection. Collect specimen in a red top (preferred) or SST tube from a fasting patient (12-hour fast). Send to Specimen Processing in a green bag. Specimen must be spun and aliquoted within 2 hours of draw.
Monday - Friday
2 - 5 days
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
0.10 - 2.20 ng/mL <18 years: Not established
Testing of non-fasting specimens or use of vitamin K1 supplementation can result in elevated serum vitamin K1 concentrations.
Test sent to Mayo Medical Laboratories.
84597
37992
Refrigerated preferred, ambient or frozen are acceptable