A standard olfactory acuity test using T & T olfactometer has recently been developed and gradually becomes in wide use, while the conventional intravenous olfaction test is also widely used.
In the present experiment we studied the relationship between results of these olfactory tests and prognosis in 180 patients with olfactory disturbances who had received the nose-drop treatment with glucocortico steroid hormone. As a result, cure or improvement was attained in 88 percent of the patients who gave a positive reaction to the standard olfactory acuity test and in 66 percent of those who were judged to be scaleout in this test.
In the case of the intravenous olfaction test, cure or improvement was attained in 90 percent of cases which gave a positive reaction and in 40 percent of the negative cases. Particularly in reference to the patients who gave a negative reaction to the intravenous olfaction test, one out of 65 cases attained cure and 39 cases remained unchanged. The intravenous olfaction test proved most effective among the tests to tell the prognosis of olfactory disturbances.
