Patent ID: 7887503

Claim:
A method for removing harmful organic anions and proteins from a mammalian's ventricular cerebrospinal fluid comprising: a. implanting a pump and filter system comprising, i. a power supply compartment ii. an access port for injecting a medicinal dose and for removing filtered material iii. drug reservoir and iv. pump with filter, wherein the access port, the drug reservoir and the pump and filter system are in fluid communication b. implanting a dual lumen catheter in fluid contact with the pump and filter system and in fluid contact with the spine's sub-arachnoid space c. supplying a medicinal dose into the drug reservoir via the access port d. extracting cerebrospinal fluid from the sub-arachnoid space into the drug reservoir via a first lumen of the catheter e. delivering the cerebrospinal fluid through the filter back into the sub-arachnoid space via a second lumen of the catheter f. removing filtered material from the pump and filter system via the access port, and g. supplying another medicinal dose into the drug reservoir via the access port when another medicinal dose is required.