RT Journal Article SR Electronic T1 Manometry combined with cervical puncture in idiopathic intracranial hypertension JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 26 OP 30 DO 10.1212/WNL.58.1.26 VO 58 IS 1 A1 King, J. O. A1 Mitchell, P. J. A1 Thomson, K. R. A1 Tress, B. M. YR 2002 UL http://n.neurology.org/content/58/1/26.abstract AB Objective: To determine by cerebral venography and manometry in patients with idiopathic intracranial hypertension the cause of the previously demonstrated venous hypertension in the superior sagittal and proximal transverse sinuses. Methods: Cerebral venous sinus pressure was measured before and immediately after C1-2 puncture with removal of 20 to 25 mL of CSF. Results: Lowering the intracranial pressure by lateral C1-2 puncture during manometry has shown that the venous hypertension resolves immediately. Conclusion: These studies indicate that the venous hypertension is due to compression of the transverse sinuses by raised intracranial pressure and not due to a primary obstructive process in the cerebral venous sinuses.