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Arq Neuropsiquiatr. 1997 Jun;55(2):179-85.

The predictive value of cerebrospinal fluid tap-test in normal pressure hydrocephalus.

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Unidade de Neuropsicologia e Neurolinguistica, Faculdade de Ciências Médicas (FCM), Universidade Estadual de Campinas (UNICAMP), Brasil.


Eighteen patients (mean age of 66.5 years) with normal pressure hydrocephalus (NPH) underwent a ventriculo-peritoneal shunt surgery. Prior to operation a cerebrospinal fluid tap-test (CSF-TT) was performed with measurements of gait pattern and psychometric functions (memory, visuo-motor speed and visuo-constructive skills) before and after the removal of 50 ml CSF by lumbar puncture (LP). Fifteen patients improved and 3 were unchanged after surgery. Short duration of disease, gait disturbance preceding mental deterioration, wide temporal horns and small sulci on CT-scan were associated with good outcome after shunting. There was a good correlation between the results of CSF-TT and shunt surgery (chi 2 = 4.11, phi = 0.48, p < 0.05), with gait test showing highest correlation (r = 0.99, p = 0.01). In conclusion, this version of CSF-TT proved to be an effective test to predict improvement after shunting in patients with NPH.

[Indexed for MEDLINE]

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