free triiodothyronine

The biologically active free triiodothyronine accounts for about 0.3% of the amount of triiodothyronine. Free triiodothyronine can enter the tissue cells through the cell membrane and exert physiological effects. The concentration is consistent with the concentration of triiodothyronine in the tissue and the metabolic state of the body. Free triiodothyronine has diagnostic value for non-thyroid diseases. Basic Information Specialist classification: growth and development check classification: endocrine 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: 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 2-4 weeks. Normal value 2.16 to 6.78 pmol/L. Clinical significance Reduced in hypothyroidism. Elevated in hyperthyroidism, triiodothyronine type hyperthyroidism. Low results may be diseases: Hyperthyroidism, hyperthyroidism, high heart disease may be a disease: hypothyroidism, thyroid tuberculosis, glaucoma caused by elevated upper scleral venous pressure, precocious puberty 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 Part, then calculate the concentration of FT3 in the serum to be tested. Reagent (1) 125I-T3 derivative (125I-T3-X): 1 bottle (10.5 ml), which was directly used for the experiment. (2) T3 antiserum (rabbit anti-human): 1 bottle (10.5 ml), used directly for the experiment. (3) FT3 standard (freeze-dried product): a dry bottle containing human serum and dissolved in double distilled water during use. The concentration of FT3 is 0-40 pmol/L. The actual concentration can be found in the instructions in the kit. (4) P, R precipitation reagent: 1 bottle (55 ml), used directly for the experiment. 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.