The Effect of Increased Intracranial Venous Pressure on the Pressure of the Cerebrospinal Fluid

Intracranial pressure and ventricular expansion in hydrocephalus: Have we been asking the wrong question?

“…This transmission may require only slight venous dilatation because of the limited compliance of the CSF space, which resides primarily in the spinal dura. Several investigators [38][39][40] have shown that at least 60% of an elevation in venous pressure is transmitted to the CSF space.…”

The effect of decerebrate rigidity on the intracranial pressure

“…This elevation, however, is temporary as has been shown in these experiments involving occlusion of the jugular veins. Similarly Myerson and Loman (1932) and Bedford (1935) produced a transient increase in ICP by ligation of both internal jugular veins, the normal level being speedily restored. This restoration was attributed to an "escape mechanism" namely the collateral drainage of the cerebral venous sinuses into the spinal epi-and subdural veins.…”

“…This observation was later confirmed by others who attributed it to an increase in the intracranial venous blood volume due to slowing of the cerebral venous return by the rise in the intrathoracic pressure (Becht 1920, Mayerson and Loman 1932, Bedford 1935. Rises in CSFP during straining, coughing and jugular compression are commonly observed.…”

“…The relationship between the systemic venous pressure changes and those of the CSFP is well established and it is known that the latter is modified to some extent by changes in the venous pressure 3* (Becht 1920, Weed and Flexner 1933, Bedford 1935, Ryder et al 1952. The cranial venous blood can be "ba&ed up" by raising the pressure in the superior vena cava, and this increases the ICP.…”

The Effect of High Intracranial Venous Pressure Upon the Cerebral Circulation and Its Relation to Cerebral Symptoms 1

“…Arteriovenous carbon dioxide differences roughly paralleled the arteriovenous oxygen differences in all instances. (18), Myerson and Loman (19) and others (20), that there is a close relationship between intracranial venous and cerebrospinal fluid pressure. The results indicate that in all cases the difference between the oxygen content of arterial and internal jugular venous blood is within normal limits.…”