Thyroid Stimulating Hormone (TSH)
Test ID: A865
Thyroid stimulating hormone (TSH) is a hormone produced in the pituitary gland. TSH variations influence thyroid hormone levels, and are measured as part of thyroid function tests. Abnormal TSH levels can indicate tumors of the pituitary, thyroid hormone resistance, hypothyroidism, or hyperthyroidism. Each of these health issues can cause various health complications, including weight changes, diminished fertility, fatigue, insomnia, and anxiety.
How to order a test
What is Included?
Measurement of thyroid stimulating hormone (TSH) levels by chemiluminescent microparticle immunoassay.
1 – 3 business days
The turnaround time is not guaranteed. The average turnaround time is 1 – 3 business days from the date that the sample arrives at the laboratory. Shipping time for the sample is not included. Additional time is required if the case requires confirmatory or reflex testing, or if the sample is insufficient, or if a recollection is required.
Additional Information and Resources
Preparation Before Specimen Collection
50 μL in a microtainer
Microtainer (regular blood tube)
This test requires a blood sample from a finger prick. All supplies for sample collection are provided in the kit.
- First wash and dry hands. Warm hands aid in blood collection.
- Clean the finger prick site with the alcohol swab and allow to air dry.
- Use the provided lancet to puncture the skin in one quick, continuous and deliberate stroke.
- Wipe away the first drop of blood.
- Massage hand and finger to increase blood flow to the puncture site. Angle arm and hand downwards to facilitate blood collection on the fingertip.
- Drip blood into the microtainer tube.
- Dispose of all sharps safely and return sample to the laboratory in the provided prepaid return shipping envelope.
NOTES: Avoid squeezing or ‘milking’ the finger excessively. If more blood is required and blood flow stops, perform a second skin puncture on another finger. Do not touch the fingertip.
Maintain specimen at temperatures between 2°C and 30°C during storage and transport.
Blood samples can be refrigerated or kept at room temperature for up to 7 days.
Causes for Rejection
- Incorrect or incomplete patient identification
- Incorrect specimen collection
- Inappropriate storage and transport conditions
- Incorrect specimen volume
To measure thyroid stimulating hormone (TSH) levels in a blood sample, to aid in the investigation of thyroid function.
- This report is not intended for use in medico-legal applications.
- These results should be interpreted in conjunction with other laboratory and clinical information.
- Correct specimen collection and handling is required for optimal assay performance.
- Assay interference may occur in specimens from individuals routinely exposed to animals or to animal serum products. Additional clinical or diagnostic information may be required for these specimens.
- False results may occur in specimens from individuals that have received preparations of mouse monoclonal antibodies for diagnosis or therapy. Additional clinical or diagnostic information may be required for these specimens.
Chemiluminescent microparticle immunoassay (Alinity i TSH assay)
0.35 – 4.94 μIU/mL
This reference range was obtained from the Alinity i TSH package insert.