Internally powered CSF pump systems and methods
First Claim
1. An implantable system for draining cerebrospinal fluid (CSF), said system comprising:
- a conduit having a first opening and a second opening, the first opening of the conduit being adapted to be disposed in fluid communication with a space with a patient'"'"'s CSF space and the second opening being adapted to be disposed in fluid communication with a drainage location in another portion of the patients body;
a pump coupled to the conduit to induce flow from the CSF space to the drainage location;
an implantable battery connectable to power the pump; and
a recirculation loop and a valve in the recirculation loop, wherein the valve selectively directs flow to the drainage end of the conduit or to an inlet of the pump.
1 Assignment
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Accused Products
Abstract
A method treats a patient for adult-onset dementia of the Alzheimer'"'"'s type by removing a portion of the patient'"'"'s cerebrospinal fluid, preferably (although not necessarily) by transporting the fluid to another portion of the patient'"'"'s body. An apparatus for removing cerebrospinal fluid includes (1) a conduit with a first opening and a second opening, the first opening of the conduit being disposed in fluid communication with a space within a patient'"'"'s subarachnoid space, the second opening being disposed in fluid communication with another portion of the patient'"'"'s body; and (2) a flow rate control device attached to the conduit.
173 Citations
14 Claims
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1. An implantable system for draining cerebrospinal fluid (CSF), said system comprising:
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a conduit having a first opening and a second opening, the first opening of the conduit being adapted to be disposed in fluid communication with a space with a patient'"'"'s CSF space and the second opening being adapted to be disposed in fluid communication with a drainage location in another portion of the patients body; a pump coupled to the conduit to induce flow from the CSF space to the drainage location; an implantable battery connectable to power the pump; and a recirculation loop and a valve in the recirculation loop, wherein the valve selectively directs flow to the drainage end of the conduit or to an inlet of the pump. - View Dependent Claims (2)
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3. An implanted system for draining cerebrospinal fluid (CSF), said system comprising:
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a conduit having a first opening and a second opening, the first opening of the conduit being adapted to be disposed in fluid communication with a space within a patient'"'"'s CSF space and the second opening being adapted to be disposed in fluid communication with a drainage location in another portion of the patients body; a pump of a type selected from the group consisting of diaphragm pumps, piston pumps, rotor pumps, peristaltic pumps, and screw pumps coupled to the conduit to induce flow from the CSF space to the drainage location; and an implantable battery connectable to power the pump, and a recirculation loop and a valve in the recirculation loop, wherein the valve selectively directs flow to the drainage end of the conduit or to an inlet of the pump. - View Dependent Claims (4)
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5. An implantable system for draining cerebrospinal fluid (CSF), said system comprising:
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a conduit having a first opening and a second opening, the first opening of the conduit being adapted to be disposed in fluid communication with a space within a patient'"'"'s CSF space and the second opening being adapted to be disposed in fluid communication with a drainage location in another portion of the patients body; a pump coupled to the conduit to induce flow from the CSF space to the drainage location; an implantable power source connectable to power the pump; and a recirculation loop and a valve in the recirculation loop, wherein the valve selectively directs flow to the drainage end of the conduit or to an inlet of the pump. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification