TSH


Abbrev Code:TSH   
Order Code:LAB129Order Name:TSH
Synonyms:Third Generation Thyroid Stimulating Hormone; Thyrotropin
Methodology:Chemiluminescence
St Johns/St Joseph/Woodwinds: CMIA
CPT Codes: 84443 x1
Turnaround Time:Varies by site.


Collection Instructions

Specimen:Blood
Optimal Volume:2.5 mL
Minimum\Peds Volume:0.6 mL
Container:Green (lithium heparin, gel), St Johns/St Joseph/Woodwinds-Green (lithium heparin, no gel)
Alternate Containers: Green (lithium heparin, no gel), Purple (EDTA), Red (no gel), Red or gold (gel), St Johns/St Joseph/Woodwinds - Red (no gel)
Contraindications:Large doses of biotin (10 mg or more per day) may cause clinically significant interference in TSH levels. If interference is suspected, it is strongly recommended that biotin is discontinued for at least one week prior to retesting.


Processing and Shipping

Specimen Processing:Centrifuge and aliquot 1.25 mL, 0.2 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:7 days refrigerated; indefinitely frozen
Test Performed at or Referral Lab Chemistry  (M Health Maple Grove Clinic, Range, UMMC-East Bank, Oxboro Bloom, Lakes, Ridges, Northland, Southdale, UMMC/UMMCH-West Bank, M Health Clinic and Surgery Center, Grand Itasca, St. Joseph's, St. John's, Woodwinds)


Interpretive

Critical Range:0-3 years: Greater than 23 mIU/L
Reference Range:St Johns/St Joseph/Woodwinds:
Age mIU/L
0-7 d 3.2-21.0
7 d & older 0.3-5.0
 

All other sites:
Age mIU/L
0-3 d 1.0-20.0
4-30 d 0.5-6.5
31 d - 5 mo 0.5-6.0
6 mo & older 0.4-4.0
 
Use:Evaluate thyroid function in people with intact pituitary glands.


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