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  • Title: Continuous intraventricular pressure monitoring for diagnosis of normal-pressure hydrocephalus.
    Author: Pfisterer WK, Aboul-Enein F, Gebhart E, Graf M, Aichholzer M, Mühlbauer M.
    Journal: Acta Neurochir (Wien); 2007 Oct; 149(10):983-90; discussion 990. PubMed ID: 17676411.
    Abstract:
    OBJECTIVES: Normal-pressure hydrocephalus (NPH) syndrome is treatable by implantation of a cerebrospinal fluid (CSF) shunt. However, diagnosis of NPH by clinical and radiological findings alone is unreliable, and co-existing structural dementia can contribute to low success rates after shunt implantation. The aim of our study was to investigate whether long-term results after shunt implantation in NPH improve when surgical candidates are selected by continuous intraventricular pressure monitoring (CIPM). PATIENTS AND METHODS: Ninety-two consecutive patients who were admitted with suspected NPH received CIPM for 48 h including an intraventricular steady-state infusion test to determine the resistance outflow. With positive CIPM, shunt implantation was performed and the patients were prospectively followed up for 1 to 10 years (median 6.5 years). RESULTS: CIPM was negative in 37 patients. Fifty-five patients had a positive CIPM and received CSF shunt. 96.1% of them improved from gait disturbance, 77.1% from cognitive impairment and 75.7% from urinary dysfunction. Clinical improvement remained during long-term follow-up in all but 3 patients who showed a decline at 4, 5 and 7 years, respectively. CIPM-related complications (ventriculitis) occurred in only one patient. CONCLUSION: CIPM is a safe and valuable tool to establish a reliable diagnosis of NPH and to identify promising surgical candidates.
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