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Cerebral hernodynamics in the diagnosis of normal pressure hydrocephalus

From the Cerebrovascular Research Center, Departments of Neurology (Drs. Kushner, Younkin, Hurtig, and Reivich) and Radiology (Dr. Goldberg), University of Pennsylvania School of Medicine, Philadelphia, PA, and the Department of Neurology (Dr. Weinberger), Mount Sinai Medical Center, New York, NY.

We studied the effect of CSF drainage on cerebral blood flow (CBF) in normal pressure hydrocephalus (NPH) and non-NPH dementia using the ¹³³Xenon inhalation technique. Dementia patients had lower CBF than matched elderly normals. Flow values for NPH and non-NPH patients did not differ before or after CSF drainage. CBF did not increase after lumbar puncture, and these measurements were not useful in predicting the outcome of ventricular shunt surgery. Postoperative CBF didnot increase after successful shunting.

Address correspondence and reprint requests to Dr. Kushner, Cerebrovascular Research Center, University of Pennsylvania, Room 429, Johnson Pavilion (G2), 36th & Hamilton Walk, Philadelphia, PA 19104.

Supported by USPHS Program Project grant No. NS-10939-11.

Presented in part at the thirty-fourth annual meeting of the American Academy of Neurology, Washington, DC, April 1982.

Accepted for publication April 13, 1983.

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