Cochlear Electrode Array Winding for Channel Isolation
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Solution Overview
Problem
Existing hearing prostheses, such as cochlear implants, face challenges in efficiently isolating electrodes to stimulate specific frequency bands in the cochlea, leading to potential electrical shorts or opens, which can affect the perception of sound.
Innovation Solution
A method of winding a wire to form an electrode assembly with specific bunching patterns and windings to create separate channels, ensuring electrical isolation between electrodes, and testing for shorts and opens without exposing the assembly to a non-sterile environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrodes are closely positioned in the cochlea to stimulate multiple frequency bands, then the coverage of frequency ranges is improved, but the risk of electrical shorts between electrodes increases
Solution Approach 1:
The patent implements a nested insulation structure where multiple layers of insulation material are placed concentrically around the electrode wire. The first insulation layer is applied directly to the wire, followed by a second insulation layer, creating a nested configuration that provides enhanced electrical isolation between closely spaced electrodes while maintaining compact dimensions for cochlear implantation
Solution Approach 2:
The patent employs composite insulation structures combining different materials with complementary properties. The insulation system integrates materials with varying dielectric strengths and physical characteristics to achieve both electrical isolation and mechanical flexibility, allowing the electrode array to navigate the complex geometry of the cochlea without causing shorts
2Adaptability or versatility
If complex winding patterns are used to create separate channels for different frequency bands, then the channel separation is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies insulation material to the electrode wire before the winding and formation processes. This preliminary insulation application simplifies subsequent manufacturing steps by preventing electrical shorts during assembly and eliminating the need for complex post-assembly insulation procedures, thereby reducing overall manufacturing complexity while maintaining effective channel separation
Solution Approach 2:
The patent divides the electrode array into distinct segmented channels, each insulated independently. This segmentation allows each frequency band channel to be manufactured and tested separately before final assembly, simplifying the overall manufacturing process by breaking down the complex multi-channel structure into manageable independent units
3Ease of operation
If the electrode array is tested outside the cochlea, then the testing accessibility is improved, but the risk of contamination to non-sterile environment increases
Solution Approach 1:
The patent employs flexible insulation coatings and protective films that maintain sterility while allowing the electrode array to be manipulated and tested outside the cochlea. These thin film barriers prevent contamination during external testing procedures, enabling comprehensive electrical and functional testing without compromising the sterile status of the implantable device
Solution Approach 2:
The patent implements protective insulation and sterile barriers before the electrode array is exposed to non-sterile environments during testing. This beforehand protection allows accessibility for various testing procedures while preventing contamination, as the protective layers are already in place to cushion against environmental contaminants
Data Source
AI summary
Winding a wire at a first location such that the wire is bunched at the first location, extending the wire from the first location to a second location, winding the wire at the second location such that the wire is bunched at the second location, extending the wire from the second location back towards the first location to a third location proximate the second location, winding the wire at the third location such that the wire is bunched at the third location, extending the wire from the third location back towards the first location to a fourth location at least proximate the first location, winding the wire at the fourth location such that the wire is bunched at the fourth location, severing the wire at one or more locations, and forming an electrode assembly utilizing the windings.