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Epic Code LAB126 T4 (Thyroxine), Total, Blood Level

Test Name Alias

T4 Total | 724

Interface Order Alias

11084

Ordering Instructions

Please keep in mind, biochemical thyroid function evaluation should begin with the Thyroid Function Cascade (SH#6701)

Collection Instructions

Specimen Collection: Blood

 

Container(s): 4.5 mL Mint Green Top (Lithium Heparin Gel) or 5.0 mL Gold Top (Serum Separator-SST Gel)

Preferred Volume to Collect: 4.5 mL

Minimum Volume to Collect: 1.0 mL

Neonate Volume to Collect: 0.5 mL

Capillary collect ok? Yes

Microtainer acceptable: Yes

 

Collection Instructions:

  • After collection, gently invert tube 8-10 times.
  • Specimen should be processed within 2 hours – See Processing Instructions.

Processing Instructions (Laboratory, Outpatient or Off-site collection)

Processed Specimen: Plasma or Serum

Centrifuge/Spin: Yes

Aliquot: Yes

 

Processing Instructions:

  • Plasma is preferred specimen type
  • Green Tube/Plasma: Centrifuge after collection.
  • Gold Tube/Serum: Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours.

Transport Temperature: Refrigerate

Specimen Stability

Ambient: 8 hours

Refrigerate: 72 hours

Frozen: aliquot plasma/serum for longer storage

Laboratory Retention: 72 hours

Test Frequency

Available daily, usual TAT 1 day.

Reference Range

5.1 – 14.1 mcg/dL

Performing Department

CHEMISTRY

Performing Department Laboratory Location

Spectrum Health Regional Laboratory, Grand Rapids, MI

Methodology

Electrochemiluminescence Immunoassay (ECLIA)

CPT

84436-LAB-THYROXINE TOTAL

CDM Code

4059013

Epic Test ID

1230101198

LOINC

Total T4: 3026-2

Beaker LOINC

LIPEMIA INDEX, SERUM: N/A
TOTAL THYROXINE: 3026-2

Mayo Access Code

SHO724

Reviewed Date

3/5/2020

Beaker Names

Beaker Procedure Name: T4, TOTAL
Beaker Display Name: T4 (Thyroxine), Total, Blood Level
BEAKER TEST NAME: T4 TOTAL
BEAKER TEST REPORT NAME: T4 Total

Beaker Synonyms

No synonym on file

Beaker Location, Container and Temperature

BW CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
BW CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated