Free triiodothyronine (FT3)

T3 is a hormone synthesized and secreted by thyroid follicular cells. FT3 accounts for about 0.3% of T3. It can enter the tissue cells through the cell membrane and exert physiological effects. Its concentration is consistent with the concentration of triiodothyronine in the tissue, and it is also consistent with the metabolic state of the body. It also has diagnostic value for non-thyroid diseases. Clinically, the RIA method is commonly used. Basic Information Specialist classification: growth and development examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Seen in hypothyroidism. Normal value: FT3: 4-10pmol/L Above normal: Found in hyperthyroidism, triiodothyronine type hyperthyroidism. negative: Positive: Tips: Stop eating iodine-rich foods before checking. Normal value Free triiodothyronine (FT3) 4 to 10 pmol/L. Clinical significance Increased: seen in hyperthyroidism, triiodothyronine type hyperthyroidism. Reduced: seen in hypothyroidism. Low results may be diseases: hypothyroidism, hyperthyroidism in the elderly, sub-clinical hypothyroidism, high results may be diseases: hypothyroidism, hyperthyroidism, hyperthyroidism, thyroid tuberculosis, female precocious puberty, upper sclera Glaucoma precautions due to elevated venous pressure 1. Before the inspection, you must stop eating foods rich in iodine, such as kelp, seaweed, sea fish and shrimp, etc., depending on the amount of food, stop eating for 2 to 4 weeks. 2. The following drugs should be stopped before the examination. According to the dosage and time, stop taking 2~8 weeks. (1), iodine-containing drugs, such as iodide, compound iodine solution, iodine-containing tablets, etc. (2) Drugs that affect thyroid function, such as thyroid tablets and antithyroid drugs. (3) Some Chinese herbal medicines, such as seaweed, kelp, fritillary, burdock, Mutong, etc. 3. The patient should be fasted on the day of the examination. Inspection process Thyroid hormone assay. Not suitable for the crowd People with reduced hematopoietic function such as leukemia, various anemia, myelodysplastic syndrome, or people with thrombocytopenia should pay attention to blood draw, and should not take more or more blood. Adverse reactions and risks 1, subcutaneous hemorrhage: due to pressing time less than 5 minutes or blood draw technology is not enough, etc. can cause subcutaneous bleeding. 2, discomfort: the puncture site may appear pain, swelling, tenderness, subcutaneous ecchymosis visible to the naked eye.