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Test Code LAB129 TSH (Thyroid-Stimulating Hormone; Thyrotropin), Plasma

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Cobas ECLIA electrochemiluminescence

Note: For automatic reflex testing of abnormal TSH, order LAB5725 Thyroid cascade, Plasma.

Literature References:

Package Insert: Thyrotropin TSH. Roche Corporation 04/2021.

Specimen Requirements

Specimen Type: Plasma
Container/Tube: Mint-green top (lithium heparin)
Specimen Volume: Full tube

 

Day(s) Test Set Up

Monday through Sunday

Turnaround Time:
STAT: 1 hour after receipt in laboratory 
Routine: 2 to 4 hours after receipt in laboratory

Test Classification and CPT Coding

84443

Reference Values

TSH

Age Reference Interval
< 4 days 1.00 - 25.00 mcIUnit/mL
4 days - 30 days 0.50 - 10.00 mcIUnit/mL
> 30 days 0.30 - 4.20 mcIUnit/mL

Specimen Transport Temperature

Ambient

Additional Information

For BJH Laboratory Use Only

Alternate Tube(s):

1 plain, red-top tube

dark green (lithium heparin)

Purple top (K2 & K3 EDTA)

Analyte Stability:

See Analyte Stability Chart in Special Instructions.

Laboratory Processing Instructions:

Test performed in BJH Core Lab.  Processed by automated line for delivery to the Cobas 8000. Completed specimens are stored refrigerated for 5 days.

Test performed in Ambulatory Cancer Building Lab.  Centrifuge sample and deliver to the Cobas.  Completed specimens are stored refrigerated for 5 days. 

Special Instructions

LOINC Code Information

Name LOINC Code
TSH, Plasma 11580-8