Abstract
By means of Motokawa's method of electric flicker, we measured for 60 minutes variations of electric flicker values (difference of electric thresholds for appearance and disappearance of flicker) of 19 subjects after a blood transfusion, a bleeding or an injection of plasma.
1. After the bleeding the value increased gradually, reached a maximum about 30 minutes after the bleeding, and then decreased to the initial value in about 60 minutes.
2. In case of blood transfusion, decreases instead of increases were observed. The value gradually decreased, reached a minimum 10-20 minutes after the transfusion, and then, increased to the initial value in about 60 minutes.
3. In case of the plasma injection, no significant change of electric flicker values could be found.
From these facts it was concluded that an increase of oxygen content of the blood causes a decrease of electric flicker values, and vice versa.
The authors have pleasure in acknowledging their indebtedness to Prof. K. Motokawa who has guided them kindly.
