The author observed the thyroid 1311 uptake rate using an intradermal injection method. The amount
of activity remaining at the site of intradermal injection of 0. 1 ml. of 5 pCi of 131I in physiologic saline was measured in ? 79 cases of hyperthyroidism and in 24 cases of . hypothyroidism. The cases . . had been confirmed by clinical and laboratory findings, at the department of medicine, . (radioisotope clinic) Pusan National University Hospital.. Twenty-nine normal control cases were examined currently,, t by the same technique during the period from Jan. 1967 to June 1970. The following results.-were; - obtained:
1. In the normal group, the ranges and mean values of the thyroid uptake, 10,, 15, 20, 25, -30 and
60 minutes after iatt lermal 131I injection, were 0-10%(6.33±1.63), 0-15%(7.:83±2.12),, 0-1596_k_
(8.46±2.82), r
5.1-496O.-66±2.27), 5.1-25%(10.47±2.52),.:5.1.30%(13..03±4.42 .,.
2. In the jhyperthyroid group, the ranges _ and mean,.values of ,the -thyroids-uptake_ 40, 15, 20,.,
30 and 60 Minutes alter~in´tradermal 1311 injection were 5.1-45%(22.25±7.04), 10:1-5096(2&32±,L jp je-~
6.67), 15.1-55966(34176±11163 X), 15.1-65%(37.95±7.72), 20.1,^65%(41.49±10.05) and ,20.1- #} .
80%(48.71±12.51)
{ ´= Y
3. In the hypothyroid group, the, ranges of thyroid-´ 131I uptake ~ by intradermal 1311 _injection at .10, . ._ 15, 20, 25, 30 and 60 minutes lay between 0 and 10%, and the the mean _values were 4.23±1.76, 5.08±1.68, 5..56±1.70,, 6.02±1.75, 6.37±1.91 and 6.95±2.07.
4. In conclusion, thyroid function test using an intradermal injection method in cases of hyperthy roidism, showed characteristic values which seemed to be of diagnostic significance. _ F
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