Patient should fast overnight, and refrain from Vitamin C intake for 24 hours.
Draw blood in a green lithium heparin tube. Spin, separate as soon as possible (within 2 hours) and send 1.0mL plasma frozen in an amber screw-capped plastic tube. Indicate on transport tube “plasma”. Contact lab for dry ice for shipment.
*CRITICAL FROZEN–PROTECTED FROM LIGHT*
Frozen 5 days
3-5 days Performed Mon, Wed, Fri