Test Name: TSH-Adult/Pediatric
EPIC Search Term: LABTSH
Synonyms: THYROID STIMULATING HORMONE
Preferred Container: 1 x 0.6 mL Green Lithium Heparin with Gel Microtainer
Alternate Container: 1 x 0.6 mL Amber Microtainer with Gel
1 x 1 mL Green Lithium Heparin Tube with Gel
1 x 1 mL Red/Black Serum Separator (SST) Vacutainer
Sample Type: Blood
Causes for Rejection: Grossly turbid sample
Interfering Substances: Gross turbidity
Testing Frequency: Daily
Expected Turn Around Time: Same day
Clinical Application: Useful for the following:
An aid in the diagnosis of primary hyperthyroidism
Prediction of thyrotropin-releasing hormone-stimulated TSH response
Monitoring patients on thyroid replacement therapy
Confirmation of thyroid-stimulating hormone (TSH) suppression in thyroid cancer patients on thyroxine therapy
Differential diagnosis of hypothyroidism

Methodology: Immunometric immunoassay
Reference Ranges: Age uIU/mL
Cord Blood 3 - 22
0 - 3 days 1 - 20
4 days - 30 days 0.5-6.5
31 days - 5 months 0.7-4.8
6 months - 14 years 0.7-4.1
15 years - 18 years 0.5-3.4
Adults: >/= 19 years 0.4-4.9
Pregnant, euthyroid females (>/= 19 years):
First trimester: 0.1-2.5
Second trimester: 0.2-3
Third trimester: 0.3-3
Unit of Measure: uIU/ML
Test Performed By: Texas Children's Hospital Pathology Services

Available at TCH Main Campus: 832-824-5152
6621 Fannin, MC 1-2261
Houston, TX 77030-2399
Lab Section: Chemistry