Vitamin K Studies

Pathology category

Biochemistry - referred tests

Code

VITK

Referral code

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Test information

Vitamin K is a fat soluble compound important in the hepatic synthesis of clotting factors. Not routinely available (expensive test), discuss with Biochemist

Guidelines

Pre-analytical

Ideally collect venous blood after overnight fast, use plain tubes or suitable anticoagulant eg heparin and separate serum. IMPORTANT vitamin K is highly light sensitive, protect from strong light at all times.

Reference range

see report

Tube type

Tube type info

Lithium Heparin (preferred) or plain

Special requirements

Plasma or serum

Minimum volume

2 mL

Assay frequency

TAT Inpatient (urgent)

TAT Inpatient

4 weeks

TAT GP/Outpatient

4 weeks

Referral lab

Dept of Haemostasis & Thrombosis, Guys & St Thomas NHD Trust