Self-Testing Circuitry for Implantable Medical Devices
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Solution Overview
Problem
Existing transcutaneous energy transfer (TET) systems for implantable medical devices require manual triggering for self-testing, which can lead to human error, and existing automatic self-testing solutions do not efficiently verify the operation of all components that could impact patient health without consuming excessive battery power.
Innovation Solution
A closed system with self-testing circuitry that automatically triggers periodic verification of multiple components in an implantable medical device using a system clock and external RF energy, minimizing energy consumption by supplementing power from an external RF field when available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual triggering is used for self-testing, then the testing can be initiated by user control, but human error may occur and testing may be forgotten
Solution Approach 1:
The implantable medical device performs self-testing automatically without requiring user intervention. The device monitors its own operational status and initiates diagnostic sequences autonomously, eliminating the need for users to manually trigger tests while ensuring consistent reliability.
Solution Approach 2:
The device continuously monitors its operational parameters and uses this feedback to determine when self-testing should be performed. The system automatically detects anomalies or scheduled test intervals and initiates appropriate diagnostic sequences based on real-time status information.
2Reliability
If automatic self-testing is implemented, then human error is eliminated, but energy consumption increases
Solution Approach 1:
The device performs self-testing at predetermined periodic intervals rather than continuously. The system schedules diagnostic sequences at specific time intervals (e.g., daily or weekly) when the device is in a low-power state, ensuring reliability while minimizing overall energy consumption through intermittent rather than continuous operation.
Solution Approach 2:
The testing frequency and duration are dynamically adjusted based on device operational status, battery charge level, and detected anomalies. The system adapts test parameters in real-time to balance thoroughness with energy conservation, reducing power consumption when the device is functioning normally while increasing testing intensity when anomalies are detected.
3Reliability
If comprehensive component testing is performed, then all potential malfunctions are detected, but energy consumption increases
Solution Approach 1:
The comprehensive testing of the implantable medical device is divided into multiple segments or modules. Instead of testing all components simultaneously, the system performs targeted diagnostic sequences on specific subsystems at different time intervals, allowing thorough verification while distributing energy consumption across multiple smaller testing events rather than one large comprehensive test.
Solution Approach 2:
The device implements differentiated testing strategies for different components based on their criticality and operational characteristics. High-risk components undergo more frequent and thorough testing, while less critical components are tested less frequently. This localized approach to quality control ensures comprehensive verification of important elements while optimizing overall energy consumption.
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
Enables automatic, periodic self-testing of all critical components in implantable medical devices without external triggering, optimizing energy usage by leveraging external RF energy to reduce the burden on the internal power source.
Implementation Method 1
An external device separated from the internal device by a boundary and disposed exterior to the boundary. The external device is in telemetric communication with the internal device and generates an external RF energy source during telemetric communication with the internal device.
Data Source
AI summary
A closed system such as a TET system in which self-testing of all components of the implantable medical device whose malfunction could negatively impact on the proper operation of the closed system is automatically and periodically performed without triggering from an external device. In addition, a closed system including automatic, periodic self-testing of the implantable medical device in which, whenever practical, testing of the components is synchronized with telemetric communication of the external device whereby an external RF field generated by the external device is used to supply necessary power to perform self-testing.