High tsh low free t3
[DOC File]The Endogenous and Exogenous Principals
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In secondary hypothyroidism the TSH is usually normal, but may be low or even mildly elevated. If secondary disease is suspected, a free-T4 must be performed along with TSH. If subclinical or clinical hypothyroidism is present, testing for thyroid peroxidase antibodies (TPOAb) should be performed to rule out an autoimmune mechanism (e.g ...
[DOC File]Thyroid disease: guidelines for diagnosis and management
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However, other thyroid function tests (T4, free T4, TSH and TBG) were normal. We suspected that thyroid hormone autoantibodies (THAA) in her serum interfered with T3 and free T3 analyses. The presence of THAA was demonstrated by the use of various procedures as follows.
[DOC File]2-28-08 Thyroid Disorders
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high free T4/T3 levels, but not necessarily total T4/T3. Low TSH - since there is a lot of T4/T3, feedback on TSH high ( low TSH. Hypothyroidism - same idea, but opposite ( low T4/T3 ( no feedback, high TSH. QUIZ: TSH Testing - the most sensitive test for thyroid function is . TSH! Very responsive to T4/T3; high in hypothyroidism. Thyroid Tests ...
TSH Levels: Normal, High, or Low (Including Optimal Thyroid Levels)
TSH - will be increased in 1o hypothyroidism (low T4/T3 ( lack of neg. feedback) Free T4 - will be decreased ( measure if TSH high. Free T3 - will be decreased, but less sensitive ( don’t measure; (recall: get all 3 for hyper tho) Antibodies - will have anti-TPO and anti-Tg Ig’s. Tx - give L-thyroxine (synthetic T4… has longer T1/2 than ...
[DOC File]2-27-08 Thyroid Physiology
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It represents the pituitary's need or desire for more thyroid hormone (T4 or T3). Thus a high TSH. level is like the pituitary saying it has a ‘high need for thyroid hormone’ or the body can tolerate more thyroid energy than it is getting and it is meant to generate more thyroid hormone production. Conversely, a low TSH
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