The severity of the symptoms and the occasional serious effects following encephalography have interfered with the free use of this important diagnostic procedure. During the last three years there has been a general effort to make encephalography more certain, comfortable and safe. The use of the automatic continuous flow apparatus, originally worked out by Liberson in 1924 and made more efficient by von Storch in 1935, has reduced the number of immediate reactions and eliminated some of the failures associated with the old syringe method.1
In 1932 Davidoff and Dyke worked out a simple technic which consisted of using a minimum of air, carrying out the procedure in the x-ray room before the x-ray tube, taking x-ray pictures after 20 cc. of air had been injected and stopping the injection of air as soon as ventricular and subarachnoid filling was adequate.2 They used a basal anesthesia obtained by
SCHWAB RS, FINE J, MIXTER WJ. REDUCTION OF POSTENCEPHALOGRAPHIC SYMPTOMS BY INHALATION OF 95 PER CENT OXYGEN. Arch NeurPsych. 1937;37(6):1271–1282. doi:10.1001/archneurpsyc.1937.02260180051003
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