[Electromanometric extradural recording of intracranial pressure]

The author studied experimentally the method of continuous electromanometric extradural recording of intracranial pressure. In the experiments a pressure chamber is introduced into the cranial bone extradurally. The pressure is transduced to a measuring set based on Elema-Schonander electromanometer. The pressure changes are being transduced by means of a hydraulic system. The experimental material comprised 12 dogs. Intracranial pressure measurements were carried out under condtions of considerable dynamic changes of this pressure caused by removal of cerebrospinal fluid, intravenous infusion of distilled water, expanding body (a baloon placed in the extradural space), brain oedema. The investigations confirmed the value of the method. Furthermore it was found that measurements of intracranial pressure by means of suboccipital tap give false results. The results of the reported experiments served for introduction of the method for clinical use.