Burr-hole flow control device
First Claim
1. A surgically implantable flow control device for controlling the flow of fluid from one portion of a body to another, the device comprising:
- a base including an inlet port and a valve seat surrounding the inlet port; and
a flow control member secured to the base and including an asymmetric membrane resiliently biased to contact the valve seat in a manner forming a releasable seal therebetween to provide controlled resistance to proximal-to-distal fluid flow through the device, the membrane including a thickened septum portion overlying the inlet port and a relatively thin portion responsive to fluid pressure differentials on inlet and outlet sides thereof.
2 Assignments
0 Petitions
Accused Products
Abstract
A surgically implantable flow control device positionable over a burr-hole through a patient'"'"'s skull is provided for use in shunt systems for controlling the release of entrapped body fluids. The device includes a rigid base including an inlet port and a valve seat which surrounds the inlet port, and a flow control member secured to the base. The flow control member has an asymmetric membrane which is resiliently biased to contact the valve seat in a manner forming a releasible seal therebetween, to provide controlled resistance to proximal-to-distal fluid flow through the device. The membrane includes a septum portion overlying the inlet port and a relatively thin portion responsive to fluid pressure differentials on inlet and outlet sides thereof. A membrane shield overlies an outlet side of the membrane and includes a needle guide aperture in alignment with the septum portion of the membrane and the inlet port.
86 Citations
23 Claims
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1. A surgically implantable flow control device for controlling the flow of fluid from one portion of a body to another, the device comprising:
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a base including an inlet port and a valve seat surrounding the inlet port; and a flow control member secured to the base and including an asymmetric membrane resiliently biased to contact the valve seat in a manner forming a releasable seal therebetween to provide controlled resistance to proximal-to-distal fluid flow through the device, the membrane including a thickened septum portion overlying the inlet port and a relatively thin portion responsive to fluid pressure differentials on inlet and outlet sides thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A surgically implantable flow control device for controlling the flow of fluid from one portion of a body to another, the device comprising:
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a base including an inlet port and a valve seat surrounding the inlet port; an inlet connector integral with the base and having a passageway therethrough terminating at the inlet port; a flow control member secured to the base and including a membrane resiliently biased to contact the valve seat in a manner forming a releasable seal therebetween to provide controlled resistance to proximal-to-distal fluid flow through the device, the membrane including a thickened septum portion overlying the inlet port and a relatively thin portion responsive to fluid pressure differentials on inlet and outlet sides thereof; an outlet separated from the inlet port by the flow control member; and an outlet connector integral with the base and having a passageway therethrough forming the outlet. - View Dependent Claims (11, 12, 13, 14, 15, 22)
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16. A surgically implantable flow control device for controlling the flow of fluid from one portion of a body to another, the device comprising:
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a base including an inlet port and a valve seat surrounding the inlet port; a flow control member secured to the base and including an asymmetric membrane resiliently biased to contact the valve seat in a manner forming a releasable seal therebetween to provide controlled resistance to proximal-to-distal fluid flow through the device, the membrane including a thickened septum portion overlying the inlet port and a relatively thin portion responsive to fluid pressure differentials on inlet and outlet sides thereof; and means for guiding a needle inserted into the flow control device when subcutaneously implanted, through the septum portion of the membrane. - View Dependent Claims (17, 18, 20, 21, 23)
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19. The flow control device of claim wherein the membrane shield includes prongs which engage the base to hold the membrane shield in place.
Specification