Thyroid 131 iodine absorption rate

The thyroid gland can selectively extract iodine from the blood. Isotopically labeled iodine (such as 131 iodine) can also be taken by the thyroid gland. The rate and intensity of thyroid iodine absorption can be calculated by measuring the radioactivity count of the thyroid gland in the neck. Rate and intensity can reflect the functional status of the thyroid gland. Basic Information Specialist classification: growth and development check classification: endocrine examination Applicable gender: whether men and women apply fasting: fasting Tips: Stop taking iodine-containing foods and drugs (kelp, seaweed, jellyfish, kelp, seaweed, oysters, mussels, compound iodine solution, thyroid tablets, iodine, etc.) 2 months before the test. Normal value Geiger 3h 0.057 ~ 0.245 (5.7% ~ 24.5%). 24h0.0151 ~ 0.471 (15.1% ~ 47.1%). Flashing method 3h 0.05 to 0.30 (5% to 30%). 24h0.30~0.60 (30%~60%). Clinical significance Abnormal result (1) rise 1 hyperthyroidism, 3h and 6h>24h>0.47. 2 The thyroid gland is in the iodine-deficient state of iodine-deficient goiter, menopausal women and pregnant women after 6 weeks of pregnancy. 3 thyroid disease subacute thyroiditis, congenital thyroid disease. (2) lower Hypothyroidism, secondary hypothyroidism (caused by hypopituitarism), acute or subacute thyroiditis, lymphocytic thyroiditis (Hashimoto's thyroiditis), non-thyroid stagnation, taking iodine Food or medicine. People who need to be tested: those who have increased food intake but are getting thinner, big neck and so on. Low results may be diseases: children without thyroid cretinism, hypothyroidism, postpartum thyroiditis, chronic lymphocytic thyroiditis, sporadic goiter, painless thyroiditis, high results may be disease: autonomic high functionality Thyroid adenoma, radiation thyroiditis, actinic keratosis, toxic nodular goiter, subacute thyroiditis precautions Before inspection: (1) Beginning 2 months before the examination, stop taking foods and medicines containing high iodine (kelp, seaweed, jellyfish, kelp, seaweed, oysters, mussels, compound iodine solution, thyroid tablets, iodine, etc.). (2) Stop taking buttercups, scallops, medlar, sea yan, crab, tribromide, bromobenzamine, hormones, etc. for 2 weeks. (3) Stop taking fish, yellow croaker, squid, squid, squid, shrimp, diazol, methylthiouracil, and formazan for 1 week. (4) The test cannot be reviewed within 1 month. (5) After 3 months of intravenous pyelography, oral iodanoic acid can be used for 1 month. Inspection process Examination method: Oral isotope 131 iodine 74-148 lb. can be taken on an empty stomach in the morning, and then the thyroid site radioactivity counts at different times (usually 2, 4, 24 hours after the service) were measured, and the 131 iodine rate of thyroid absorbing at each time was calculated. The normal value of thyroid absorbing 131 iodine rate varies from region to hospital. Therefore, it is necessary to ask the normal values ​​of each hospital to avoid erroneous judgment. Not suitable for the crowd No. Adverse reactions and risks Nothing.

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