An Ommaya reservoir is a special device implanted under the scalp that allows direct access to the cerebrospinal fluid (CSF). It consists of a small, dome-shaped container connected to a catheter that reaches into the ventricles of the brain. This reservoir is primarily used for the administration of medications, such as chemotherapy, directly into the CSF, which can be vital for treating certain types of cancer that affect the central nervous system (CNS).
