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Test Code TSH TSH, LAB129 (Thyroid Stimulating Hormone)

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements

Container/Tube:

Preferred:  Green-top (lithium heparin) tube

Acceptable:  EDTA lavender, Gold-top serum gel tube or plain, red-top tube

Specimen Volume: 0.2 mL of plasma or serum

Stability:  Separated samples stored at 2 – 8°C are stable 7 days

Collection Instructions:

Note: 1. Human anti-mouse antibodies or other heterophile antibodies may be present in patient specimens. This assay has been specially formulated to minimize the effects of these antibodies, however results from patients known to have these antibodies should be carefully evaluated.

2.  This assay is affected by biotin interference.

Reference Values

 

Age Group

TSH

Neonates

0 – 7 days

1.79 – 9.69 mcIU/mL

Neonates

8 days – 29 days

1.80 – 7.97 mcIU/mL

Infants

1 – 23 months

0.82 – 5.91 mcIU/mL

Children

2 years – 12 years

0.66 – 3.90 mcIU/mL

Adolescents

13 years – 20 years

0.46 – 3.98 mcIU/mL

Adults

≥21 years

0.36 – 3.74 mcIU/mL

 

Methodology

Chemiluminescence Assay

Useful For

Thyroid Function

Day(s) Test Set Up

Monday through Saturday

Test Classification and CPT Coding

84443