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Laboratory Medicine

Test catalogue


Test Name


Red Tube with thin top Specimen Type/Requirements

Container Type = 1 Red Top

Minimum Volume = 3 ml Blood

Specimen Handling

Collection Instructions: Collect 5 mL plain red top vacutainer. Avoid use of separator tubes and separator gel. Write your initials, date and time of collection on the collection label or requisition.

Special Instructions:

Separate samples from cells as soon as possible. Repeated freezing and thawing of samples should be avoided

Rejection Criteria:

Gel separator, grossly Hemolyzed and icteric samples, Unlabeled or Not Sufficient Quantity Samples will be rejected.

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Turnaround Time (TAT)

10 Days

Test Utilization

Reference value

Therapeutic: 2.7 - 4.0 µmol/L

Toxic: Toxic: > 27 µmol/L

Test Code



Gas Chromatography

Testing Location

Referred Out – ON, Canada (ROICL02)

Other Information

Last Updated: September 26, 2019