Patent ID: 8002730

Claim:
A venous shunt system adapted to shunt cerebral spinal fluid in a patient, comprising: a catheter, having: a first fluid flow lumen and a second fluid flow lumen through which said cerebral spinal fluid flows, said first fluid flow lumen having a fluid flow lumen pressure; a first lumen having a first lumen pressure and coupled to said second fluid flow lumen; and a second lumen coupled to said first lumen and defined, at least in part, by a second lumen wall; a low-pressure valve coupling said first fluid flow lumen to said first lumen, said cerebral spinal fluid flowing through said low-pressure valve when a difference between said fluid flow lumen pressure and said first lumen pressure is greater than a pressure rating of said low-pressure valve; a one-way valve coupling said first fluid flow lumen to said second lumen, said one-way valve having a higher pressure rating than said low-pressure valve and allowing at least some cerebral spinal fluid to enter said second lumen when said difference between said fluid flow lumen pressure and said first lumen pressure is greater than said pressure rating of said one-way valve; an anti-thrombogenic agent contained within said second lumen, said anti-thrombogenic agent being delivered to said first lumen when said cerebral spinal fluid enters said second lumen; and wherein said second lumen is deformable when a force external to said venous shunt system is exerted on said second wall, wherein said anti-thrombogenic agent is delivered to said first lumen when said force is exerted on said second lumen wall.