Thyroid iodine uptake test

The thyroid iodine test refers to the selective absorption of iodine by the thyroid gland. Under normal circumstances, the iodine in the thyroid is dozens of times the plasma concentration, which is the "iodine taking effect" of the thyroid gland. The method of examination is to measure the radioactivity intensity directly in the thyroid gland after oral administration or injection of a small amount of radionuclide-containing iodized salt. Basic Information Specialist classification: growth and development check classification: endocrine examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Common in primary hypothyroidism, secondary hypothyroidism, subacute non-suppurative thyroiditis. Normal value: Radionuclide iodine (2 hours): 13%-25% Radionuclide iodine (4 hours): 18%-30% Above normal: Common in untreated hyperthyroidism. negative: Positive: Tips: 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 hours 13% to 25%; 4 hours 18% to 30%; 24 hours 36% to 45%. Clinical significance Abnormal result Increased is common in untreated hyperthyroidism. Reduced common in primary hypothyroidism, secondary hypothyroidism, subacute non-suppurative thyroiditis. In particular, the body's lack of iodine, taking anti-thyroid drugs and oral contraceptives can make the iodine absorption rate high. People who need to be tested Big neck, heart palpitations, chest tightness, shortness of breath, nervousness, easy to be excited, irritability, insomnia. Low results may be diseases: high hypothyroidism may cause diseases: hyperthyroidism in the elderly, thyroid hyperthyroidism in children Before inspection 1, 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) Many Chinese herbal medicines such as kelp, yellow medicinal herbs and kelp and seaweed in food contain high iodine, which can affect the results. Inspection process The examination method is as follows: after oral administration or injection of a small amount of radionuclide-containing iodized salt, the radioactivity intensity is directly measured in the thyroid gland. Not suitable for the crowd Generally no taboos. Adverse reactions and risks Generally not.