Patent ID: 8740833

Claim:
A method of shunting cerebral spinal fluid in a patient, comprising the steps of: placing a first fluid flow lumen of a catheter to allow cerebral spinal fluid to flow therethrough developing a fluid flow lumen pressure; coupling a first lumen, having a first lumen pressure, of said catheter to a second fluid flow lumen; coupling a second lumen having a second lumen pressure and which is deformable, defined, at least in part, by a second lumen wall, to said first lumen; coupling a low-pressure valve between said first fluid flow lumen and 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; coupling a one-way valve between said first fluid flow lumen and 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 second lumen pressure is greater than said pressure rating of said one-way valve; and delivering an anti-thrombogenic agent into said second lumen; wherein said anti-thrombogenic agent is delivered to said first lumen when an external force is exerted on said second lumen wall.