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TT4 vs. FT4 in laboratory practice
Clinical chemistry and laboratory medicine, 2016Thyroid function tests are among the most common requirements in the laboratory. According to the guidelines, thyrotropin (TSH) is recommended as a first test for thyroid function. If the TSH is outside the RI it’s recommended to make FT4. FT4 is the biologically active fraction of the hormone that doesn’t depend on the concentration of binding ...
Rolić, Tara +5 more
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Misleading FT4 and FT3 Due to Immunoassay Interference From Autoantibodies
Clinical Biochemistry, 2022Immunoassays used to measure total and free thyroxine (T4 and FT4) and total and free triiodothyronine (T3 and FT3) can provide inaccurate results due to interference from endogenous autoantibodies.A 74-year-old female treated for hypothyroidism with levothyroxine replacement had elevated thyroid stimulating hormone (TSH), FT4, and FT3.
Travis, Goettemoeller +2 more
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Thyroid hormone (fT4) reduces lipoprotein(a) plasma levels
Atherosclerosis, 1995To study the influence of thyroid hormone on Lp(a) plasma concentration we measured Lp(a), total cholesterol, LDL-C, HDL-C, triglycerides and fT4 levels and determined apo(a) phenotypes in 26 patients with hyperthyroidism in a follow-up study before and after thyreostatic treatment.
F, Hoppichler +4 more
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Aptamer-Antibody Sandwich Immunosensor Forelectrochemical Detection of Ft4
Microchimica ActaAn aptamer-antibody sandwich electrochemical immunosensor was studied. Fe3O4/MWCNTs-COOH/Nafion was modified and fixed on a glassy carbon electrode to amplify electrical signals. The antibody was coupled with AuNPs to form conjugates. It captures the target free thyroxine (FT4) and forms antibody-AuNPs/FT4 macromolecular complexes.
Yuechan, Shi +7 more
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Acta medica Austriaca, 1985
A new equilibrium assay for the determination of serum free thyroxine was evaluated in 514 patients. The assay comprises a two-vial-procedure to measure total thyroxine and free thyroxine fraction by use of monoclonal antibodies. Free thyroxine concentrations are calculated from fT4-fraction and total thyroxine concentration readings.
A, Passath, O, Eber, G, Leb, H, Hayn
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A new equilibrium assay for the determination of serum free thyroxine was evaluated in 514 patients. The assay comprises a two-vial-procedure to measure total thyroxine and free thyroxine fraction by use of monoclonal antibodies. Free thyroxine concentrations are calculated from fT4-fraction and total thyroxine concentration readings.
A, Passath, O, Eber, G, Leb, H, Hayn
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Nuklearmedizin. Nuclear medicine, 1983
In 211 consecutive patients T4/TBG ratio correlated well with direct FT4 determination over a wide range of TBG concentration. However, there was a tendency to decreasing T4/TBG ratios with an increase of TBG concentration, which in consequence did lead to false results in three patients with very high TBG concentrations.
H G, Hoff, D, Reinwein
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In 211 consecutive patients T4/TBG ratio correlated well with direct FT4 determination over a wide range of TBG concentration. However, there was a tendency to decreasing T4/TBG ratios with an increase of TBG concentration, which in consequence did lead to false results in three patients with very high TBG concentrations.
H G, Hoff, D, Reinwein
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FREE THYROXINE (FT4) AND FREE TRIIODOTHYRONINE (FT3) IN AUTONOMOUS THYROID NODULES
Clinical Endocrinology, 1979SUMMARYTotal and free thyroid hormones (T3, T4, FT3 and FT4), TSH and its response to TRH were determined in sixty‐three patients affected by autonomous thyroid nodules: mean concentrations of free T3 (FT3) were significantly higher in hot nodules (suppressing extranodular tissue on the scan) as compared to warm ones, even in those cases where total T3
Langer M, MADEDDU, Giuseppe, Costanza C.
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SatNEx - Project "SATNEX JA2410 FT4 VOTOS"
2010The VOTOS activity, performed as part of the EC FP6 IST project SATNEX, focused on the various congestion control protocol over satellite. The main issue was the analysis of the behavior of congestion control protocols over satellite networks, with particular attention to those systems that adopt the most recent Demand Assignment Multiple Access (DAMA)
Ferro E., Potortì F.
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[Hypotheses on the validity of the radioimmunologic measurement of FT4].
Klinische Wochenschrift, 1984In patients undergoing long-term thyroid hormone therapy with constant doses the results of FT4 concentrations measured by radioimmunoassay (FT4-AMERLEX) were compared with calculated FT4 values and related to total thyroxine, serum TBG levels, respectively T4/TBG, to control the validity of radioimmunologic FT4 measurements for clinical routine ...
A, Passath, G, Leb, P, Ollinger
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[FT4 immunoassay interference : A case report].
La Tunisie medicale, 2015Measurement of thyrotropin and free thyroxin made using immunoassays are usually needed in clinical endocrinology. Here, we report a case of a patient with type 2 diabetes who presented a weight loss. To eliminate hyperthyroidism, thyroid function tests were performed.
Khansa, Chaabouni +6 more
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