[Venous pressure in the brain, its relationship to systemic venous pressure and to the development of cerebral edema].

Studies on rabbits have shown that cerebral venous pressure (continuosly recorded in the sagittal venous sinus) is linearly dependent on the systemic venous pressure measured from the cranial vena cava. On the other hand, the changes in the brain volume are also linearly dependent on the systemic and hence the cerebral venous pressure. In the preedematous brain, the slope of the curve considerably rose due to the increased pliancy of its tissue. When brain edema developed the slope fo the curve became appreciably less as compared to the normal brain. This is evident of the increased rigidity of edematous brain tissue.