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Comparison of two triiodothyronine uptake techniques for the assessment of thyroid function
  1. Vivian Chan,
  2. Joan McAlister,
  3. J. Landon
  1. Department of Medical Isotopes, St Bartholomew's Hospital, London
  2. Department of Chemical Pathology, St Bartholomew's Hospital, London


    The present study was designed to compare the Thyopac and Triosorb triiodothyronine uptake tests. A normal range was established for the two procedures. Neither test was affected by iodine-containing drugs or contrast media but abnormal results were obtained during pregnancy and in subjects receiving oestrogens. Both tests proved satisfactory in the diagnosis of hypo- and hyperthyroidism, giving results consistent with clinical assessment and with serum protein-bound iodine determinations. The Thyopac procedure was preferred for a number of reasons. It requires less plasma; it is slightly simpler and quicker and it is not time dependent.

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