Results 111 to 120 of about 2,218 (160)
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Clinica Chimica Acta, 1978
The concentration of thyroxine-binding globulin in the serum can now be measured by a simple and specific radioimmunoassay. Triiodothyronine uptake and measurement of total thyroxine have been combined to yield a free thyroxine index which has been found to correlate with the clinical state of the patients.
M, Lecureuil +3 more
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The concentration of thyroxine-binding globulin in the serum can now be measured by a simple and specific radioimmunoassay. Triiodothyronine uptake and measurement of total thyroxine have been combined to yield a free thyroxine index which has been found to correlate with the clinical state of the patients.
M, Lecureuil +3 more
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Free Thyroxine and Free Thyroxine Index In Women Taking Oral Contraceptives
Clinical Nuclear Medicine, 1981This study compares the accuracy of the free thyroxine index and free serum thyroxine radioassay in evaluating the metabolic status of 36 euthyroid women, 17 of whom were taking oral contraceptive drugs. Results indicate that the free thyroxine index does not uniformly compensate for estrogen-induced elevations in total serum thyroxine concentrations ...
M A, Swanson, T R, Custer, C M, Suey
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Clinical Endocrinology, 1974
SUMMARYThe effective thyroxine ratio (ETR), a single test of thyroid function which has a highly significant linear correlation with serum free thyroxine (T4) concentration, was assessed for its effectiveness in distinguishing the euthyroid state in subjects with abnormalities of T4‐binding proteins.In patients with low activity of T4‐binding proteins,
M L, Wellby +2 more
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SUMMARYThe effective thyroxine ratio (ETR), a single test of thyroid function which has a highly significant linear correlation with serum free thyroxine (T4) concentration, was assessed for its effectiveness in distinguishing the euthyroid state in subjects with abnormalities of T4‐binding proteins.In patients with low activity of T4‐binding proteins,
M L, Wellby +2 more
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Free thyroxine in myocardial infarction
Experientia, 1984High values for the free thyroxine fraction were found in the serum of 24 patients during the early phase of myocardial infarction. A strong correlation between the free thyroxine fraction and free fatty acids suggests that they compete for protein binding sites.
O J, Kirkeby, C, Risöe, K, Kirkeby
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Free Thyroxine and Triiodothyronine
CRC Critical Reviews in Clinical Laboratory Sciences, 1971(1971). Free Thyroxine and Triiodothyronine. CRC Critical Reviews in Clinical Laboratory Sciences: Vol. 2, No. 2, pp. 223-242.
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Interference in free thyroxine immunoassay
European Journal of Internal Medicine, 2008We report two patients who presented with non-specific symptoms of tiredness that prompted their clinician to order a thyroid function test. In both cases, free thyroxine (T4) was reported to be high, with a normal thyroid-stimulating hormone (TSH). Repeated blood tests from the same laboratory using the same assay method yielded similar results.
Sujoy, Ghosh +4 more
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“Free Thyroxine Index”: A Reliable Substitute for “Free” Thyroxine Concentration
American Journal of Clinical Pathology, 1974“Free thyroxine index,” determined as the product of thyroxine-I (T4-I) by competitive protein-binding and T3 uptake of 125I-triiodothyronine by surface adsorption on inorganic silicate particles, is compared with “free” thyroxine concentration. The normal range of index resulting from use of the Tri-Tab T3 uptake method is 0.9-2.9, and coincides very ...
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A comparison of effective thyroxine ratio and free thyroxine in serum
Clinica Chimica Acta, 1973Abstract A new test of thyroid function, the Effective Thyroxine Ratio (ETR) has been assessed by performing correlation analyses of ETR results and the results of free thyroxine (T 4 ) index and free T 4 concentration. The ETR is as effective as either the free T 4 index or the free T 4 concentration in differentiating both untreated thyrotoxic ...
M L, Wellby +2 more
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DIAGNOSTIC VALUE OF SERUM THYROXINE AND FREE THYROXINE INDEX
Acta Medica Scandinavica, 1973Abstract. A modified method for determination of serum total thyroxine (T4) using competitive protein‐binding is reported. This method proved particularly valuable when analysing a large number of serum samples. A clinical evaluation of T4 was performed in various thyroid disorders.
K, Liewendahl, R, Ruutu, B A, Lamberg
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Analytic Measurements of Free Thyroxine
Clinics in Laboratory Medicine, 1993This article has attempted to clarify two main areas of uncertainty relating to the clinical use of free TH determinations. The first centers on the validity of the free hormone hypothesis. This has been the subject of contentious debate for more than a decade, and final agreement among endocrinologists on this issue has yet to be reached.
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