Thyroid hormone suppression test

The thyroid hormone inhibition test is based on the highest absorption rate of 131% of the normal person after the drug is reduced to less than 25% or more than 50% before taking the drug, and the hyperthyroidism is not significantly inhibited. Determine if the person being examined has hyperthyroidism. Thyroid function is regulated by TSH secreted by the pituitary gland. After administration of exogenous thyroid hormone (T3 or T4), the level of thyroid hormone in the blood increased, and the secretion of TSH was reduced by negative feedback regulation, and the 131 iodine rate of the thyroid was also decreased, which was significantly suppressed. In the case of hyperthyroidism, thyroid function is autonomic due to various pathological factors. After oral administration of thyroid hormone, the 131I rate of thyroid was not significantly decreased, and the performance was not inhibited. Basic Information Specialist classification: growth and development check classification: endocrine examination Applicable gender: whether men and women apply fasting: fasting Tips: Pay attention to the normal diet before the examination, pay attention to normal work and rest, and prevent endocrine disorders. Normal value The inhibition rate was >50% for normal thyroid function; the inhibition rate was <50% for hyperthyroidism. After taking the medicine, the highest iodine absorption rate of the normal person is reduced to less than 25% or more than 50% before the medication. The hyperthyroidism is not significantly inhibited. Clinical significance Abnormal results: hyperthyroidism referred to as hyperthyroidism, also known as toxic diffuse goiter, Graves disease, is an autoimmune disease. Can be afraid of heat, sweating, agitation, excessive appetite, with weight loss, tachycardia, special eye signs (exophthalmos), goiter, thyroid murmur, tremor and other performance. The people who need to be examined are: patients with hyperhidrosis, agitation, hypersexuality, and symptoms associated with hyperthyroidism such as weight loss. Precautions Forbidden before examination: pay attention to normal diet, pay attention to normal work and rest, and prevent endocrine disorders. Requirements for inspection: Actively cooperate with the doctor's request. Inspection process Principles and methods: Thyroid function is regulated by TSH secreted by the pituitary gland. After administration of exogenous thyroid hormone (T3 or T4), the level of thyroid hormone in the blood increased, and the secretion of TSH was reduced by negative feedback regulation, and the 131 iodine rate of the thyroid was also decreased, which was significantly suppressed. In the case of hyperthyroidism, thyroid function is autonomic due to various pathological factors. After oral administration of thyroid hormone, the 131 iodine rate of the thyroid gland did not decrease significantly, and the performance was not inhibited. First, the first thyroid gland 131 iodine test, followed by oral thyroid hormone, the specific method is: triiodothyronine 20μg, 4 times a day, even for one week; or thyroxine 60mg, 3 times a day, even for two weeks Or levothyroxine 200μg, once a day, for two weeks. Then take the second thyroid gland 131 iodine test. Not suitable for the crowd Inappropriate crowd: temporarily unknown. Adverse reactions and risks There are no related complications and hazards.