A delivery method and implantable apparatus that allows for controlled, enhanced and (pre)-programmable administration of a biologically active agent into the spinal structures and/or the brain via the epidural space of a mammal, particularly of a human being and including a feedback regulated delivery...http://www.google.com/patents/US7593770?utm_source=gb-gplus-sharePatent US7593770 - Method and device for enhanced delivery of a biologically active agent through the spinal spaces into the central nervous system of a mammal
