Abstract
As a prevention of lowering of blood pressure during high spinal nesthesia, an intravenous injection of “pressor drug” was employed. This was don- as follows.
Twenty minutes after the beginning of continuous intravenous injection of a solution containing 1 cc of ephedrine in 300 cc of normal saline solution which was administered in the course of one hour, patient was anesthetized and operation performed. 35 of more serious cases were sele; ted for this study and the results were compared between the group in which ephedrine was subcutaneously given and the group for control.
It was found that the group in which a continuous intravenous drip method was employed showed a marked beneicial effect in preventing the lowering of blood pressure and shock incident to operation. Furthermore, the examination of the fluctuation of blood pressure during the twenty minutes of preanesthetic period will aid in the evaluation of the sensitivity of the vegetative nervous system, and in determining the indication for anesthesia.
