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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 Serum

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

Specimen Handling

Collection Instructions: Collect sample in red top tube. Please contact our Biochemist Dr Beriault on ext 2226 for approval prior to ordering this test. Write your initials, date and time of collection on the collection label.

Laboratory Staff Instructions Separate from cells within 2 hours of collection. Store and send frozen.

Rejection Criteria Plasma, Gross hemolysis, Unlabeled or Not Sufficient Quantity Samples will be rejected.

Stability: Sample is stable for 6 days at room temperature, 14 days refrigerated and 365 days frozen

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

Required Documentation

Turnaround Time (TAT)

15 Days

Test Utilization

Reference Value

Adults baseline: < 30 ng/dL

8:00 AM following 1 mg dexamethasone previous evening: 140 - 295 ng/dL

8:00 AM following 8 mg dexamethasone (4 x 2 mg doses) previous day: 1600 - 2850 ng/dL

Test Code




Testing Location

Referred Out – BC, Canada(ROSPH43)

Other Information

Last Updated: June 06, 2019