Neuroradiological applications of the Ommaya reservoir system

By way of a frontal burr hole a subcutaneous reservoir connected to a flexible catheter inserted through a foramen of Monroe into the third ventricle is installed. The use of this device facilitates contrast and radioisotope ventriculography, reducing both trauma and stress to the patient at the same time. The procedure greatly improves the quality of contrast studies in space-occupying lesions in the posterior fossa by rendering simultaneous cisternography technically possible and safe.