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T3 Uptake

Alternative Name:

T3 Uptake (T3U)

Clinical Utility:

T3 uptake is an indirect measure of the quantity of thyroxine binding proteins (thyroid binding prealbumin, albumin, and TBG) in plasma. It is directly proportional to the degree of saturation of the binding proteins by thyroxine.

Container:

1 mL SST Tube

Collection Instructions:

Fill tube, invert gently 5 times, label with patient name, let stand for minimum of 30 minutes, maximum of 1 hr, spin for 10-15 minutes

Storage Instruction:

Refrigerate

Turnaround Time:

1 days

CPT Code:

84479 (1)