Vitamin K

Clinical Chemistry

---

Description

---

Sample Type

PROTECT SAMPLE FROM LIGHT. Plasma, Lithium Heparin, minimum 0.5 mL. Whole blood, EDTA, minimum 1 mL

---

Turnaround Time

Within 3 weeks

---

External Notes

Vitamin K is the generic name for a group of compounds which includes vitamin K1 (also known as phylloquinone or phytomenadione), menaquinones and a synthetic form menadione. Please note, only vitamin K1 is measured by the reference laboratory. Plasma vitamin K1 is influenced by plasma triglyceride concentrations. Results are therefore reported as a vitamin K1:triglyceride ratio. Sent to: Scottish Trace Element and Micronutrient Reference Laboratory, Glasgow Royal Infirmary FOR LAB USE ONLY: SST and haemolysed samples are unsuitable. Samples unprotected from light for more than 24 hours are also unsuitable. Samples received on a Friday should be stored frozen.

---

Patient Preparation

Fasting samples preferred, or at least 8 hours post treatment if on supplementation or TPN.

---

Please note: the above information is subject to change and we endeavour to keep this website up to date wherever necessary.