Cerebral Spinal Fluid Shunt Plug for Valve Stability and Bone Protection
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Solution Overview
Problem
Current cerebral spinal fluid shunt systems face issues such as shunt valve mobility, bone resorption, catheter kinking, and complications related to the placement of shunt valves and catheters through the skull, which can lead to infection and deformity.
Innovation Solution
A cerebral spinal fluid shunt plug with a housing that securely positions the shunt valve and allows for precise placement of ventricular and peritoneal catheters, minimizing movement and kinking, and incorporating a wireless intracranial monitoring device for improved management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shunt valve is positioned between the skull and the scalp, then the shunt system can control cerebral spinal fluid flow, but the shunt valve may resorb bone creating a defect in the skull
Solution Approach 1:
The patent introduces a shunt plug as an intermediary component that is implanted into a burr hole in the skull to secure the shunt valve. This mediator prevents direct contact between the shunt valve and the skull bone, thereby eliminating the bone resorption problem while maintaining reliable shunt valve positioning and function.
2Ease of operation
If the ventricular catheter passes through and around the burr hole, then the catheter can connect the ventricle to the shunt valve, but the catheter is susceptible to kinks
Solution Approach 1:
The shunt plug serves as a mediator that provides a smooth, guided pathway for the ventricular catheter through the burr hole. The catheter tunnel formed in the shunt plug eliminates sharp angles and irregular surfaces that cause kinking, while still allowing easy catheter insertion and connection to the shunt valve.
3Ease of operation
If the shunt valve and ventricular catheter are implanted through the skull, then the shunt system can function, but the components are susceptible to movement
Solution Approach 1:
The patent divides the shunt system into separate functional components: a shunt plug implanted in the skull, a shunt valve attached to the plug, and catheters connecting to the valve. This segmentation allows each component to be optimized for its specific function while reducing overall system movement, as the heavy shunt valve is anchored to the skull via the plug rather than being directly implanted through loose tissue.
Solution Approach 2:
The shunt plug acts as a stable intermediary anchor that is securely implanted in the burr hole, providing a fixed foundation for the shunt valve. This mediator prevents the shunt valve from migrating or moving, as the plug's direct skull fixation creates a stable mounting point.
4Ease of manufacture
If a burr hole is created in the skull for catheter passage, then the shunt can be installed, but it creates a potential pathway for infection
Solution Approach 1:
The shunt plug serves as a protective intermediary that seals the burr hole pathway. By providing a controlled tunnel for the catheter and covering the burr hole opening, the plug minimizes direct exposure of the skull defect to the external environment, thereby reducing infection risk while maintaining the necessary catheter passage.
Data Source
AI summary
A cerebral spinal fluid shunt plug includes a shunt plug housing having a shunt valve recess formed therein and an intracranial monitoring device recess with an access hole. A shunt valve is positioned within the shunt valve recess of the shunt plug housing and an intracranial monitoring device is passed through the central access hole of the shunt plug housing.