Introduction: A new shunting principle taking advantage of the knowledge of normal CSF dynamics has been developed.
Experience and outcome: The shunt has been used in more than 150 patients. The final version has shown a stable function in 45 patients. The physiological shunting principle has an expected and immediate clinical effect. We have not seen any over-drainage and any symptoms or signs of thrombosis or occlusion of the sinus. The ventricular system decreases only slightly. The shunt has been used in children and adults and in all types of hydrocephalus. The shunt can be implanted using local anaesthesia. The implantation in the transverse sinus has proven to be simple and safe.