(3)TRa RTH:这个非常罕见,与B型RTH相反,TRa1的突变介导的RTH表现为在一些组织的甲状腺功能减退的症状(中枢神经系统、胃肠道、心肌、骨骼肌、骨骼),无垂体-甲状腺轴失调,临床特征包括生长发育迟缓、骨骼发育不良,便秘,T4低或正常,T3高或正...
Interpretation of thyroid function tests and their relationship to iodine nutrition: changes in TSH, free T4, and free T3 resulting from iodine deficiency and iodine excess. In: Preedy VR, Burrow GN, Watson RR, editors. Comprehensive handbook of iodine: nutritional, biochemical, pathological and ...
Tsai:Our primary care colleagues can do a workup and interpretation of thyroid function tests in most cases. In the situations where the thyroid function test results are discordant (ie, elevated TSH and elevated free T4 levels or low TSH and low free T4 levels) or difficult to interpret, i...
Therefore, if thyrotoxicosis is clinically suspect, and T4 and FTI are normal, the test "T3 -RIA" is recommended (this is not the same test as "T3 uptake," which has nothing to do with the amount of T3 in the patient's serum). T4 is decreased in hypothyroidism and in euthyroid ...
TSH concentrations are measured as part of a first-line thyroid function test in patients suspected of having hyperthyroidism or hypothyroidism of thyroid hormones. Interpretation of the results depends on both the TSH and T4 concentrations. In some situations measurement of T3 may also be useful. ...
Free T4 (FT4): This test measures the level of free (unbound) thyroxine, the primary thyroid hormone produced by the thyroid gland. Free T3 (FT3): This test measures the level of free (unbound) triiodothyronine, the active form of thyroid hormone that affects metabolism. ...
High TSH Levels: Lab Interpretation for New Nurse Practitioners 23 related questions found What is considered a dangerously high TSH level? Experts don't agree on which TSH levels should be considered too high. Some suggest that TSH levels of over 2.5 milliunits per liter (mU/L) are abnormal...
Browning MCK, Ford RP, Callaghan SJ and Fraser CG. Intra-and interindividual biological variation of five analytes used in assessing thyroid function: implications for necessary standards of performance and the interpretation of results. Clin Chem 1986;32:962-6. ...
first week of life in most children, but may remain transiently elevated in a few individuals despite normal free T4 levels. For proper interpretation of an abnormal TSH from a newborn thyroid screen, a Free T4 by Dialysis (test code 35167) or Total T4 (test code 867) should be ...
The key search terms were “thyroxine (T4)”, “thyrotropin (TSH)”, “triiodothyronine (T3)”, “hyperthyroidism”, “hypothyroidism”, “euthyroidism”, “subclinical hyperthyroidism”, “subclinical hypothyroidism”, “thyroid dysfunction or disorders”, “dementia”, “Alzheimer’s disease (AD)”...