Modular Cochlear Implant Components for Minimally Invasive Upgrades
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Solution Overview
Problem
Cochlear implant systems face challenges with component replacement due to surgical difficulties and tissue damage, outdated processing technology, and signal interference within the body, particularly related to power supply degradation and signal variability.
Innovation Solution
A modular cochlear implant system with detachable components, including a signal processor, electrical stimulator, and middle ear sensor, allows for individual component replacement and upgrade without disturbing other components, using detachable connectors and a pectoral region battery placement to minimize surgical trauma and improve signal processing through adjustable analog and digital stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If components are integrated into a single implanted unit, then device complexity is reduced, but ease of repair deteriorates because individual components cannot be replaced
Solution Approach 1:
The cochlear implant system is divided into separable modules including a receiver/stimulator unit and a speech processor unit, connected via detachable leads. This allows individual components to be replaced or upgraded independently while maintaining overall system functionality, resolving the contradiction between integrated design and repairability.
2Device complexity
If power supply is integrated with processing circuitry, then device complexity is reduced, but reliability deteriorates over time due to power supply degradation
Solution Approach 1:
The power supply function is extracted as a separate replaceable battery component that can be independently replaced when degraded, while the processing circuitry remains in the implanted receiver/stimulator unit. This separation maintains simplicity while ensuring long-term reliability through component replacement.
3Adaptability or versatility
If processing circuitry is upgraded over time, then adaptability improves, but ease of repair deteriorates due to surgical difficulty
Solution Approach 1:
The speech processor is separated as an external or remotely implantable module that communicates with the receiver/stimulator via wireless or wired connections. This allows processing technology to be upgraded independently without requiring surgical access to the cochlear implant site, maintaining adaptability while avoiding surgical complexity.
4Adaptability or versatility
If leads are removed and reintroduced during component replacement, then adaptability improves, but object-affected harmful factors worsen due to tissue damage
Solution Approach 1:
The receiver/stimulator unit is implanted with pre-configured connection interfaces and lead pathways during the initial surgery. This preliminary setup allows future component replacements to occur without removing or reintroducing leads into cochlear tissue, maintaining adaptability while preventing additional tissue damage.
5Adaptability or versatility
If signal processing is performed externally, then adaptability improves, but device complexity increases due to multiple components
Solution Approach 1:
The receiver/stimulator unit is designed with universal communication interfaces that can work with different speech processor modules and configurations. This multi-functionality allows adaptability in signal processing approaches while maintaining a streamlined implanted device architecture.
Data Source
AI summary
Cochlear implant systems can include a cochlear electrode, a stimulator in electrical communication with the cochlear electrode, a sensor configured to receive a stimulus signal and generate an input signal based on the received stimulus signal, and a signal processor in communication with the stimulator and the sensor. The signal processor can include an analog filtering stage configured to generate an analog filtered signal from a received input signal and a digital filtering stage configured to generate a digitally filtered signal from the analog filtered signal. The analog filtering stage and digital filtering stage can be used to normalize the frequency response of the digitally filtered signal with respect to the stimulus signal.