Blood Sciences Test


Vitamin K

Specimen

Serum

Special Instructions

Contact the laboratory when sending a request for vitamin K.

Light sensitive. Protect samples from strong light. Tubes should be placed in dark e.g.wrapped immediately in tin foil. 2 mL serum required, though in neonatal patients 1 mL serum is sufficient.

Ideally collect sample after overnight fast.

PIVKA II (functional marker of Vitamin K status) will normally also be assayed from this sample.

Samples will be stored at -80 Celsius before sending on dry ice to referral laboratory.

Availability

Referred to the Human Nutristasis Unit, Guy’s and St Thomas’ Hospital specialist unit.

Stat Availability

No

Assayed By

Haematology

Specimen Labelling Procedure