A sterile implantable device intended to provide access to the subarachnoid (intrathecal) space of the spinal column for infusion (e.g., chemotherapeutic agents, pain relieving drugs) and/or drainage [e.g., cerebrospinal fluid (CSF)]. It consists of a subcutaneous chamber, with a self-sealing puncturable septum for percutaneous insertion of a hypodermic needle, attached to a distal catheter which passes into the target site. It is made of metal [e.g., titanium (Ti)] and synthetic polymers (e.g., silicone); disposable devices associated with implantation may be included.