TSH with Reflex to FT4

TSH serves as a marker for screening for thyroid dysfunction such as hypothyroidism and hyperthyroidism.

$ 30.00

Where It Will Help

Assessing Thyroid Dysfunction

What's Measured

Tsh

This test measures the levels of TSH as initial step, an abnormal TSH result will reflex to a free Throxin (T4) test to help in diagnosis and guide further testing if needed.

Test Preparations

Specimen collection after fluorescein dye angiography should be delayed for at least 3 days. For patients on hemodialysis, specimen collection should be delayed for 2 weeks.

According to the assay manufacturer Siemens: "Samples containing fluorescein can produce falsely depressed values when tested with the Advia Centaur TSH3 Ultra assay."

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