Test Name

Total T3

Test Code

591

Unit

ng/dL

Station

Chemistry

Synonym Name/Abbreviation

Total T3,TT3

CPT Code

84480

Performing Facility

American Medical Labs, Herzliya
Pituah

Analyzer

Roche cobas 6000

Test Method

Electrochemiluminescense Immunoassay
(ECLIA)

AML Preferred Tube

5 mL SST gel

Storage Instructions

Stability:

7 days at 2 to 8 ^oC

1 month at -20
^oC, Freeze only once.

Min. Volume

1 mL

Comments

TSH is subjected to circadian secretion
rhythm.

Turn-Around-Time

One day

Intended Use

The determination of T3 is utilized in the diagnosis of T3‑hyperthyroidism, the detection of early stages of hyperthyroidism and for indicating a diagnosis of thyrotoxicosis factitia.

Limitations

Samples should not be taken from patients receiving therapy with high
biotin doses (i.e. > 5 mg/day) until at least 8 hours following the last biotin administration.

Patient Preparation

No patient preparation
needed

Reasons for Rejection

Improper labelling.

Adult Reference Ranges

 72 – 170 ng/dL