Discrepancies between serum free triiodothyronine and free thyroxin as measured by equilibrium dialysis and analog radioimmunoassay in nonthyroidal illnesses.

@article{Liewendahl1984DiscrepanciesBS,
  title={Discrepancies between serum free triiodothyronine and free thyroxin as measured by equilibrium dialysis and analog radioimmunoassay in nonthyroidal illnesses.},
  author={Krist{\`i}an Liewendahl and Sari Tikanoja and T I Helenius and Matti V{\"a}lim{\"a}ki},
  journal={Clinical chemistry},
  year={1984},
  volume={30 5},
  pages={760-2}
}
We determined free triiodothyronine (FT3) and free thyroxin (FT4) in serum of patients with various nonthyroidal illnesses (NTI), by both commercial analog-type radioimmunoassays (A) and new equilibrium dialysis procedures (D). The mean FT3 was significantly lower in NTI by both techniques, but the decreases were of different magnitudes. The FT3(D):FT3(A) ratio was 1.96, vs 1.11 for healthy controls. In NTI the mean FT4(D) was somewhat increased, whereas the mean FT4(A) was much lower than… CONTINUE READING

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A comparison of methods for assessing thyroid function in nonthyroidal illness

  • Vermaak WJH, WJ Kalk, WJ Zakolski
  • J Clin Endocrinol Metab
  • 1982

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