Electrode Array for Alzheimer's Amyloid Beta Clearance
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Solution Overview
Problem
Current treatments for Alzheimer's disease, such as those described in US Patent Application Publication 2014/0324128 and PCT Publications WO 2017/006327 and WO 2017/072769, are inadequate in effectively clearing amyloid beta and other waste products from the brain, which contribute to the progression of the disease.
Innovation Solution
A system comprising central and peripheral electrodes, electrically coupled to control circuitry, is used to apply currents between the electrodes to clear amyloid beta, tau protein, and metal ions from brain parenchyma to the subarachnoid space, where they are naturally drained with cerebrospinal fluid, with the central electrodes configured as cathodes and peripheral electrodes as anodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrical currents are applied between electrodes to clear amyloid beta from brain parenchyma, then the clearance efficiency of waste products is improved, but the device complexity increases due to multiple electrodes and control circuitry
Solution Approach 1:
The treatment system is divided into multiple independent electrodes (central and peripheral) that can be positioned at specific locations on the skull. Each electrode functions as an independent component, allowing the system to clear amyloid beta from different brain regions simultaneously through parallel current paths, thereby improving overall clearance efficiency while maintaining modular device architecture.
Solution Approach 2:
The patent introduces cerebrospinal fluid (CSF) as an intermediary medium to facilitate the clearance of amyloid beta. Electrical currents drive amyloid beta into the CSF-filled subarachnoid space, where the CSF naturally transports the waste products away from the brain parenchyma. This intermediary approach enhances clearance efficiency by leveraging the body's existing fluid transport mechanisms.
2Reliability
If multiple electrodes are disposed at specific locations on the skull to apply currents, then the treatment effectiveness is improved, but the ease of operation deteriorates due to precise positioning requirements
Solution Approach 1:
The electrodes are pre-positioned at anatomically defined locations on the skull (central electrodes within 1 cm of the sagittal midplane, peripheral electrodes superior to the orbitomeatal plane). These predetermined positions ensure that when the device is applied, the electrodes automatically align with the correct anatomical landmarks, reducing the need for complex real-time positioning adjustments and simplifying the operation while maintaining treatment effectiveness.
Solution Approach 2:
The patent configures central electrodes as cathodes and peripheral electrodes as anodes, creating a standardized electrical field distribution pattern across the brain. This equipotential approach ensures consistent current flow through the brain parenchyma regardless of minor variations in electrode placement, thereby maintaining treatment effectiveness while tolerating some operational imprecision.
3Productivity
If central electrodes are configured as cathodes and peripheral electrodes as anodes, then the clearance of amyloid beta is improved, but the use of energy increases due to continuous current application
Solution Approach 1:
The electrical currents are applied in periodic or pulsed sequences rather than continuously. The control circuitry activates the electrodes in alternating patterns, allowing periods of current application followed by rest periods. This periodic action maintains the clearance efficiency of amyloid beta by repeatedly driving waste products into the subarachnoid space while significantly reducing the total energy consumption compared to continuous current application.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively clears amyloid beta and other substances from the brain, potentially slowing or preventing the progression of Alzheimer's disease by utilizing electrical techniques to enhance waste product removal.
Implementation Method 1
apply respective currents between one or more of the central electrodes and two or more of the peripheral electrodes, and configure the central electrodes as cathodes and the peripheral electrodes as anodes
Implementation Method 2
clearing a substance from brain parenchyma to a subarachnoid space by activating control circuitry to apply respective currents
Data Source
AI summary
A method is provided including disposing central electrodes outside and in electrical contact with a skull of a head of a subject identified as at risk of or suffering from Alzheimer's disease, within one cm of a sagittal midplane of the skull; and disposing peripheral electrodes outside and in electrical contact with the skull, superior to an orbitomeatal plane of the skull and inferior to a first plane midway between the orbitomeatal plane and a cranial vertex of the skull, the first plane parallel to the orbitomeatal plane. The subject is treated by clearing amyloid beta, tau protein, and/or metal ions from brain parenchyma to a subarachnoid space, by activating control circuitry to apply respective currents between one or more of the central electrodes and two or more of the peripheral electrodes, and configure the central electrodes as cathodes and the peripheral electrodes as anodes. Other embodiments are also described.