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Laboratory Medicine

Test catalogue

Caffeine, Serum

Test Name

Caffeine, Serum

Gold Tube Specimen Type / Requirements


Container Type = Serum: 1 Gold, Red or Green (Li-Hep) top.

Minimum Volume = 1mL Serum or plasma

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


0-2 years: Red 0.5 Microtainer

2-10 yrs: 1 mL Red top

Specimen Handling

Collection Instructions: Collect sample in a red, gold top or greep (Lithium Heparin) tube with or without gel separator. Write your initials, date and time of collection on the collection label.

Laboratory Staff Instructions: Separate and freeze immediately. Store and send frozen.

Stability: Stable frozen for 3 months.

Rejection Criteria: Not frozen, unlabeled or samples of non sufficient quantity.

Transportation: Send samples to core laboratory as soon as possible.

Required Documentation

Turnaround Time (TAT)

7 days

Test Utilization

Reference Value

Caffeine 25 - 80 µmol/L

Test Code




Testing Location

Referred Out – ON, Canada (ROICL02)

Other Information

Last Updated: January 22, 2020