Cochlear Implant Modular Design for Component Upgrades
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Solution Overview
Problem
Cochlear implant systems face challenges in upgrading or replacing internal components, particularly the processing circuitry, due to the complexity and potential damage to the cochlear tissue, as well as issues with electrical signal communication through the body.
Innovation Solution
The system includes a cochlear electrode, a stimulator, an input source, and a signal processor that can be configured to receive input signals and output stimulation signals based on a transfer function, with an inner ear sensor integrated into the cochlear electrode for simultaneous implantation, and a modular design allowing for individual component replacement and updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If internal components such as processing circuitry are replaced or upgraded, then the system can benefit from improved technology and performance, but the surgical procedure becomes more complex and risks damaging the cochlear tissue
Solution Approach 1:
The cochlear implant system is divided into separable components: the cochlear electrode array that remains implanted in the cochlea, and the internal components (receiver, processing circuitry, battery) that can be independently accessed and replaced through a separate surgical approach. This segmentation allows upgrading internal components without disturbing the cochlear electrode and tissue.
Solution Approach 2:
A receiver component is introduced as an intermediary between the external transmitter and the cochlear electrode. This receiver can be accessed and replaced through a non-cochlear surgical approach, serving as a mediator that connects the replaceable processing circuitry to the permanent cochlear electrode array.
2Adaptability or versatility
If electrical leads are removed and reintroduced into the patient's cochlear tissue for component replacement, then component upgrades are possible, but the tissue is damaged and the efficacy of cochlear stimulation is negatively impacted
Solution Approach 1:
The system separates the cochlear electrode array (which remains permanently implanted and connected to cochlear tissue) from the internal components (receiver, processing circuitry, battery) that require replacement. This allows component replacement without disturbing the cochlear electrode-tissue interface, preserving stimulation efficacy.
Solution Approach 2:
The cochlear electrode array is permanently implanted and secured in the cochlea during the initial surgery, establishing a stable electrical connection with the cochlear tissue before any future component replacements. This preliminary action ensures that the critical tissue interface is established once and does not need to be disturbed during subsequent upgrades.
3Ease of operation
If electrical signals are communicated through the patient's body between components, then wireless communication is achieved, but safety standards limit the amount of current and signal strength is reduced
Solution Approach 1:
A receiver component with electromagnetic induction capabilities serves as an intermediary that enables wireless power and data transmission between the external transmitter and internal components. This mediator allows signal communication through the body while maintaining safety by using controlled electromagnetic fields rather than high-current electrical pathways.
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 configuration simplifies the surgical procedure for implantation and allows for easier upgrades and replacements of components, reducing the risk of damaging the cochlear tissue and improving the efficiency of electrical signal communication.
Implementation Method 1
The inner ear sensor comprises a pressure transducer configured to output a signal representative of pressure detected within the tissue
Data Source
AI summary
Cochlear implant systems can include an inner ear sensor configured to receive a stimulus signal from the cochlear tissue of a wearer and generate an input signal based on the received stimulus signal. The inner ear sensor can be configured to detect pressure, for example, within a wearer's cochlear tissue and generate an input signal based on the detected pressure. The inner ear sensor can be integrated with a cochlear electrode implanted in the cochlear tissue. Systems can include a signal processor programmed with a transfer function and configured to receive an input signal and output a stimulation signal based on the received input signal and transfer function. Systems can include an implantable battery and/or communication module in communication with the signal processor. The implantable battery and/or communication module can be configured to interface with and update the transfer function of the signal processor.