RELATIONSHIP BETWEEN THE PRESSURE IN THE VEINS ON THE NERVE HEAD AND THE CEREBROSPINAL FLUID PRESSURE

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Abstract
In 1927 Baurmann1reported a method of measuring intracranial venous pressure in man. He compared the pressure in the veins on the head of the optic nerve with the cerebrospinal fluid pressure in nine cases. In these there was a direct relationship between the level of the spinal fluid pressure and his determination of the pressure in the veins on the nerve head (fig. 1). He took as his criterion of the venous pressure the intra-ocular pressure at which the veins on the nerve head first begin to pulsate. The intra-ocular pressure was raised by pressing on the eyeball with an ophthalmodynamometer of the type devised by Magitot, the intra-ocular pressure being measured with a tonometer. All the methods in which venous pulsations are used as a criterion of venous pressure were criticized by Duke-Elder2on the ground that venous pulsations in the eye are a complicated phenomenon