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What instruments are used for thyroid function tests?

Mar 17, 2025 Source: Cainiu Health
Dr. Yang Chuanjia
Introduction
Thyroid function tests can be performed using various instruments such as blood analyzers, radioimmunoassay analyzers, chemiluminescent immunoassay analyzers, electrochemiluminescence immunoassay analyzers, and time-resolved fluorescence immunoassay analyzers. When undergoing thyroid function testing, it is important to follow medical advice and avoid self-administering iodine-containing foods or medications, as they may affect the test results.

Thyroid function tests can be performed using various instruments, including hematology analyzers, radioimmunoassay analyzers, chemiluminescence immunoassay analyzers, electrochemiluminescence immunoassay analyzers, and time-resolved fluorescence immunoassay analyzers. If concerns exist, it is recommended to seek medical advice in advance. Detailed explanations are as follows:

1. Hematology Analyzer: A hematology analyzer is a commonly used laboratory instrument capable of rapidly and accurately measuring various components in the blood, including levels of thyroid hormones and thyroid-stimulating hormone (TSH).

2. Radioimmunoassay Analyzer: Radioimmunoassay is a classical immunoassay method that detects thyroid hormone concentrations in samples by labeling with radioactive isotopes. This method offers high sensitivity and specificity.

3. Chemiluminescence Immunoassay Analyzer: Chemiluminescence immunoassay utilizes light signals generated from chemical reactions to quantitatively detect thyroid hormones. This method is simple to operate, rapid, and does not require the use of radioactive substances.

4. Electrochemiluminescence Immunoassay Analyzer: Electrochemiluminescence immunoassay combines electrochemical and chemiluminescence technologies, providing highly sensitive and precise test results. It is widely used in clinical laboratories.

5. Time-Resolved Fluorescence Immunoassay Analyzer: Time-resolved fluorescence immunoassay uses fluorescent markers with specific wavelengths to detect thyroid hormones. It offers high sensitivity and strong anti-interference capability, making it suitable for the detection of complex samples.

When undergoing thyroid function testing, it is important to follow medical instructions and avoid self-administering iodine-containing foods or medications, which may affect test results.

References:

[1] Li JF. Observation on the application effect of chemiluminescence immunoassay for thyroid function in biochemical and immunological testing [J]. Chinese Medical Guide, 2025, 23(05): 134-136.

[2] Li P, Cheng S, Li JQ. Evaluation of the diagnostic efficiency of serum FT3, FT4, TSH alone and in combination for clinical diagnosis of hypothyroidism [J]. System Medicine, 2024, 9(13): 79-82.

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