Thyroid stimulating hormone stimulation imaging

Thyroid stimulating hormone excitatory imaging is based on the increase in serum thyroid hormone levels, the increase in thyroid stimulating rate after injection of thyroid stimulating hormone will be inhibited; conversely, if serum thyroid hormone levels are reduced, thyroid stimulating rate after thyroid stimulating hormone is increased The height is more obvious. The iodine function of the thyroid depends on the secretion of the thyroid stimulating hormone and the iodine function of the thyroid itself. The specific method is to first determine the thyroid iodine absorption rate, followed by intramuscular injection of bovine thyrotropin 10U, 3 times a day for 3 days. After the injection is completed, the thyroid iodine absorption rate is measured. Basic Information Specialist classification: examination classification: endocrine examination Applicable gender: whether men and women apply fasting: not fasting Tips: Pay attention to normal diet and rest and prevent endocrine disorders. Those who are allergic to thyrotropin should not do this test. Normal value After injection of exogenous thyroid stimulating hormone in normal people, the thyroid iodine absorption rate will increase. Clinical significance The thyroid stimulating hormone excitatory test in patients with primary hypothyroidism did not respond, and secondary hypothyroidism responded to the thyroid stimulating hormone stimulation test. Abnormal result 1. Primary hypothyroidism is mainly characterized by hypothyroidism; low body temperature; weight gain or myxedema; dry, cold, thick, desquamation of the skin; goiter; increased heart; less hypogonadism. Hair loss is lighter. 2. Secondary hypothyroidism has both adrenal cortex and hypogonadism. The lack of selective TSH, although reported, is rare. Secondary hypothyroidism and primary hypothyroidism have a reduction in urinary 17-ketosteroids and 17-hydroxycorticosteroids, but the reduction in secondary hypothyroidism is severe. In patients with secondary hypothyroidism, serum gonadotropin is significantly reduced or completely deficient, and gonadotropins are normal or slightly reduced in patients with primary hypothyroidism. Secondary hypothyroidism is a component of the anterior pituitary dysfunction. Most patients with secondary hypothyroidism are caused by postpartum hemorrhage and shock or pituitary tumors, such as chromoblastoma and craniopharyngioma. It is rare due to infection, craniocerebral trauma, invasive lesions, and autoimmune pituitary gland. People who need to be examined: patients with primary hypothyroidism such as hypothyroidism, hypothermia, weight gain, or myxedema, or patients with symptoms associated with secondary hypothyroidism such as adrenal cortex and hypogonadism. Precautions Forbidden before examination: pay attention to normal diet and work schedule to prevent endocrine disorders. Requirements for inspection: Actively cooperate with the doctor's request. Inspection process Specific practice: first to do thyroid iodine absorption rate measurement, followed by intramuscular injection of bovine thyrotropin 10U, 3 times a day for a total of 3 days. After the injection is completed, the thyroid iodine absorption rate is measured. △ Thyroid stimulating hormone excitatory value = [(maximum iodine absorption rate 24 hours after injection - highest iodine absorption rate 24 hours before injection) / highest iodine absorption rate 24 hours before injection] × 100%. The normal range of A thyroid stimulating hormone excitability is 11% to 35%. Not suitable for the crowd Inappropriate people: those who are allergic to thyrotropin. Adverse reactions and risks Nothing.