Implantable Device Battery Longevity Graphical Display
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Solution Overview
Problem
Current power source monitors for implantable medical devices do not effectively communicate the state of charge or discharge in an intuitive and meaningful way, making it difficult for patients and clinicians to determine when replacement is necessary, leading to premature or delayed device replacement.
Innovation Solution
An implantable medical device with electrical circuitry that calculates remaining battery longevity using voltage and energy consumption data, displayed in a graphical format with color-coded stages representing beginning of service, recommended replacement time, and end of service, allowing for easy recognition of the battery's state of discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If replacement is scheduled based on worst-case statistical forecast, then device replacement is performed, but replacement occurs several months or years before actually required, leading to unnecessary invasive procedures
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring actual battery voltage and comparing it against predicted voltage based on usage. This allows the system to detect when actual battery performance deviates from predictions, enabling dynamic adjustment of replacement timing to match actual battery state rather than relying on static worst-case forecasts
Solution Approach 2:
The system performs self-diagnosis by monitoring its own battery voltage and calculating remaining longevity based on actual usage patterns. This self-monitoring capability allows the device to determine its own replacement needs without relying on conservative external estimates, thereby avoiding premature replacement recommendations
2Ease of operation
If no visual indication of battery state is provided, then device complexity is reduced, but patients and clinicians cannot easily determine when replacement is necessary
Solution Approach 1:
The patent applies color-coded visual indicators to represent different battery states (e.g., green for adequate, yellow for caution, red for replacement needed). This color-coding system provides intuitive immediate recognition of battery status without requiring patients or clinicians to interpret numerical data, significantly improving ease of operation
Solution Approach 2:
The patent transforms abstract battery voltage and longevity data into a visual spatial representation through graphical displays showing battery state along a timeline or progress bar. This dimensional transformation from numerical to visual-spatial information makes battery status immediately comprehensible while keeping the underlying monitoring system relatively simple
3Measurement precision
If detailed battery monitoring is implemented, then replacement timing accuracy is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts only the essential measurement (battery voltage) needed for longevity prediction and focuses monitoring on this single critical parameter. By concentrating on voltage measurement rather than comprehensive battery analysis, the system achieves adequate prediction accuracy with minimal monitoring circuitry, avoiding unnecessary complexity
Solution Approach 2:
The system monitors changes in battery voltage over time and uses these parameter changes to calculate remaining longevity. By tracking voltage degradation patterns rather than attempting to measure multiple battery characteristics simultaneously, the system achieves reasonable prediction accuracy with simple voltage-sensing circuitry
Data Source
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AI summary
Displaying remaining longevity of energy source of implantable medical device having a longevity characterized by a depth of discharge representative of a first stage of discharge, e.g., beginning of service, a second stage of discharge, e.g., recommended replacement time, and a third stage of discharge, e.g., end of service.