Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
0.10 - 2.20 ng/mL
Testing of non-fasting specimens or use of vitamin K1 supplementation can result in elevated serum vitamin K1 concentrations.
2 - 5 days
- Vitamin K1 Level
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, aliquot serum into a plastic vial and refrigerate.
Test sent to Mayo Medical Laboratories.