Abstract
The indication for shunt procedures in normal pressure hydrocephalus (NPH) has been extensively investigated, including RI cisternography using 131I-RIHSA, CSF absorption using artificial CSF, clinical improvement after CSF withdrawal, cerebral blood flow (CBF), and continuous intraventricular pressure (IVP) monitoring. However, there are only few reports on chronologic changes in the intracranial compartment after a shunt procedure. Shunt function has been evaluated by clinical symptomatology, ventricular size, continuous IVP monitoring, and shunt flow measurement, among which the continuous IVP monitoring is regarded as the most reliable method. In addition to the telemetric IVP sensor (Osaka Telesensor [8, 9] (NS-20); Nagano Keiki Seisakusyo Co. Ltd., Dow Cornig K.K.), our standard ventriculo-peritoneal (V-P) shunt method consisted of a Sophy’s programmable hydrostatic pressure valve (Sophy valve) and an on-off flushing reservoir (on-off valve). The chronologic changes in IVP and ventricular size following V-P shunt operation, especially their relation to the postural IVP change, are reported.
Published Version
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