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Laboratory Medicine

Test catalogue


Test Name


Green Tube Specimen Type / Requirements

Container Type = 1 Green Top (Li-heparinized)

Minimum Volume = 4mL Blood

Tube must fill to at least ½ or greater of its vacuum capacity


Specimen Handling

Collection Instructions: Collect sample in green top Lithium-Heparin tube. Gently invert tube 5-10 times immediately after collection.

Write your initials, date and time of collection on the collection label.

Laboratory Staff Instructions Promptly spin in cold centrifuge (MUST be within 30 minutes of collection). Immediately transfer plasma to a plastic transport tube and freeze

Rejection Criteria: Gross hemolysis, Unlabeled or Not Sufficient Quantity Samples will be rejected. Plasma not separated from cells and freeze within 30 minutes of collection will be rejected.

Stability: Stable 30 mins on at room temperature, Up to 2 hours on ice or refrigerated at 2-8°C, Frozen at < -20°C or more for 2 days.

Transportation: Send sample to lab on ice as soon as possible (Do not open tube). Once seperation is done, freeze and send frozen.

Required Documentation

Turnaround Time (TAT)


Test Utilization


Reference Value

0-35 µmol/L

Test Code




Testing Location

Referred Out – ON, Canada (ROSJ03)

Other information