Sign in →

Test Code TSH TSH (THYROID STIM HORMONE)

Important Note

24 hours before this blood test: Do not take any supplements containing biotin or Vitamin B7 which are commonly found in hair, skin, and nail supplements, and multi-vitamins.

Sufficient Biotin concentrations in serum can lead to falsely decreased results.

Methodology

Chemiluminescent Immunometric Assay (Ultrasensitive)

Measurement of TSH is useful as a primary screening test for thyroid function.

Specimen Requirements

Submit only 1 of the following specimens:

Preferred:

Serum Gel Tube

Container/Tube: Serum gel tube(s)
Specimen Volume: 2 mL (minimum volume: 1 mL) of serum

Collection Instructions: Spin down within 4 hours of draw.

 

Alternate:

Plain, Red-Top Tube

Container/Tube: Plain, red-top tube(s)
Specimen Volume: 2 mL (minimum volume: 1 mL) of serum

Collection Instructions: Spin down within 4 hours of draw.

 

Alternate:

Heparinized plasma

Container/Tube: Green-top tube(s)
Specimen Volume: 2 mL (minimum volume: 1 mL) of serum

Collection Instructions: Spin down within 4 hours of draw.

 

Alternate:

EDTA plasma

Container/Tube: Lavendar-top tube(s)
Specimen Volume: 2 mL (minimum volume: 1 mL) of serum

Collection Instructions: Spin down within 4 hours of draw.

Day(s) Test Set Up

Monday through Sunday

Reference Values

< 3 Days                                                1.00 – 20.0

3 – 30 Days                                           0.50 – 6.50

1 Month – 5 Months                            0.50 – 6.00

≥ 6 Months                                            0.47 – 4.68 µIU/mL

 

 

 

Performing Laboratory

Logan Health Medical Center-Chemistry

Test Classification and CPT Coding

84443

Specimen Transport Temperature

Refrigerate