Fully Implantable Modular Cochlear Implants for Component Upgrades
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Solution Overview
Problem
Existing cochlear implants face challenges with component replacement and upgrade due to their implantation in sensitive areas, leading to tissue damage and inefficiencies in signal communication, and power supply degradation over time.
Innovation Solution
A modular cochlear implant system with detachable components, including a signal processor, stimulator, and implantable battery, utilizing impedance to reduce unintended electrical communication and allowing for individual component replacement and upgrade without disturbing other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fully implanted cochlear implant system is used, then the device can be completely integrated into the patient's body, but the processing circuitry becomes difficult to replace or upgrade due to the sensitive location and healing requirements
Solution Approach 1:
The cochlear implant system is divided into separate modular components: a first component (e.g., receiver/stimulator) and a second component (e.g., processor). This segmentation allows the processing circuitry to be replaced or upgraded independently without disturbing other implanted components, resolving the contradiction between adaptability and surgical complexity.
2Adaptability or versatility
If the processing circuitry is replaced or upgraded, then newer technology can be implemented, but the procedure requires removing and reintroducing electrical leads into the patient's cochlear tissue which can be damaging
Solution Approach 1:
By separating the processing circuitry into a removable second component that connects to the first component via a non-invasive interface, the system enables technology upgrades without requiring reinsertion of electrical leads into cochlear tissue, thus avoiding tissue damage while maintaining upgrade capability.
Solution Approach 2:
The processing circuitry is extracted as a separate removable component that can be replaced without disturbing the permanently implanted first component or the cochlear electrodes, allowing technology upgrades without harmful reinsertion procedures.
3Duration of action of stationary object
If a power supply is included with the internal components, then the device can operate independently, but the power supply performance degrades over time and requires replacement
Solution Approach 1:
The power supply is segmented as a separate replaceable component rather than being integrated with the processing circuitry. This allows the power supply to be replaced independently when it degrades, maintaining system reliability without requiring replacement of the entire implantable device.
4Ease of operation
If electrical signals are transmitted through the patient's body, then communication between components is enabled, but safety standards limit the amount of current that can flow through the patient's body
Solution Approach 1:
An intermediary coupling mechanism (such as a magnetic or inductive coupling interface) is introduced between the removable second component and the implanted first component. This intermediary enables electrical signal transmission without requiring direct current flow through the patient's body, thus satisfying safety constraints while maintaining communication capability.
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
Facilitates efficient and minimally invasive component replacement and upgrade, reducing tissue trauma and improving signal communication efficiency, while enabling a seamless transition from partial to full implantation as the patient develops.
Implementation Method 1
The signal processor may include a first impedance between the circuitry and the can to reduce unintended electrical communication between the cochlear electrode and the circuitry of the signal processor
Data Source
AI summary
Cochlear implant systems can include a cochlear electrode, a stimulator in electrical communication with the cochlear electrode, a signal processor in communication with the stimulator, and an implantable battery and/or communication module. The signal processor can receive an input signal from an input source and output a stimulation signal to the stimulator based on the received input signal and a transfer function of the signal processor. The implantable battery and/or communication module may be configured to provide electrical power to the signal processor. The signal processor may include circuitry and a can surrounding and housing the circuitry as well as a first impedance between the circuitry and the can to reduce unintended electrical communication. The implantable battery and/or communication module may include circuitry and a can surrounding and housing the circuitry as well as a second impedance between the circuitry and the can to reduce unintended electrical communication.