[Experiences in the determination of thyroxine iodine in serum in various functional conditions of the thyroid gland].

A report is given on the method of the thyroxine iodine determination in the serum. Of 213 patients the result of the thyroxine iodine determination was compared with the clinically and radiologically established functional condition of the thyroid gland. The findings are discussed. Similar results were also reported of other in-vitro-tests (T3-test, T4-test, BEJ and PBJ). According to our experiences we consider the thyroxine iodine determination in the serum siutable as screening test which - when there is a suspicion of a hypo- or hyper- thyroidism - needs the supplementation by the radio-iodine functional and localisation tests.