T3, Total *

SIM

LAB136

CPT

84480 

Synonyms

T3; T3 Hormone; Total T3; Triiodothyronine 

Specimen Type

Serum 

Container

Red-top or gold-top tube

Collection Instructions

Volume

Volume: 1.0 mL
Minimum volume: 0.7 mL(This does not allow for repeat testing) 

Additional Information

Increased T3 often occurs in hyperthyroidism. Do not confuse this test with T3 uptake; these are two different tests.

Patient Preparation

Specimen Processing Instructions

If a red-top tube or plasma is used, transfer separated serum or plasma to a plastic transport tube.

Transport Requirements

Room Temperature

Specimen Stability

Refrigerated or Room Temperature :14 days 

Rejection Criteria

Plasma specimen

Reference Range

Reference Range accompanies report

Critical Value

Test Includes

Total T3 

Methodology

Electrochemiluminescence immunoassay (ECLIA) 

Testing Frequency

LCA

002188 

Reviewed By

Rhonda Crowe

Reviewed Date

2/20/2018

Supplemental

* Denotes Reference Lab Test