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Dynamic cisternography in normal dogs and in human beings

From the Department of Surgery, Division of Neurosurgery, and the Department of Radiological Sciences, UCLA School of Medicine, Los Angeles, California.

Cisternography and ventriculography were performed in five normal anesthetized dogs to study the dynamics of tracer dispersal. Indium 111-diethylenetriaminepentaacetic acid was injected into lateral ventricles, cisterna magna, thoracic subarachnoid space, and lumbar sac. The patterns of dispersal from each injection site support a nonflow dispersal mechanism with a tendency toward ultimate equilibrium distribution throughout the cerebrospinal fluid. Quantitative data in humans complement observations made in dogs. A theory of abnormal tracer movements, based on factors observed to affect tracer dispersal in dog and man, is proposed and applied to the interpretation of abnormal cisternographic patterns seen in clinical situations.

Dr. Schossberger's address is 707 N. 12th Street, Pocatello, Idaho 83201.

This work was supported by the Volk Neurosurgical Research Fund, the Cheri Anne Carroll Neurosurgical Research Fund, and Atomic Energy Commission contract AT(04-1)Gen-12.

Received for publication July 9, 1975.

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