(Time-resolved Fluorescence lmmunochromatographic Assay)
TSH is not affected by the concentration of TBG. When thyroid function changes, TSH changes more rapidly and significantly than T3 and T4. Therefore, TSH in blood is a sensitive test that reflects the function of the hypothalamus-pituitary-thyroid axis, especially for subclinical hyperthyroidism and hyperthyroidism. The diagnosis of subclinical hypothy-roidism is of great significance. At present, TSH has been used as an indicator of neonatal thyroid function screening.