Abstract
Our urinary test was found to serve as an index indicating appropriate dosages in the thiamine therapy. In the procedures of the test an intravenous administration of 5ml of 20% fructose solution is most recommendable. A post-administration increase over the pre-administration levels in the values of pyruvic acid and α-ketoglutaric acid in the urine was found to be an indispensable index by which the test should be judged to be positive. In order to avoid possible errors it was advised that, in case the post-administration urine was too much positive for the test, it should be diluted with the pre-administration urine before the result of the test is finally determined.
