Medical Device Current Drain Modeling for Voltage-Level Time Estimates
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Solution Overview
Problem
Existing medical devices powered by depletable power sources lack accurate methods to estimate the remaining time before reaching a critical voltage level, leading to unpredictable device functionality and potential failure.
Innovation Solution
A method and system for estimating the remaining time between two voltage levels of a medical device power source by determining current drain requirements based on historical device function data, including sensor operation, processing burden, and therapy delivery current drains, to provide more accurate longevity estimates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional voltage-based estimation methods are used, then the device structure remains simple, but the accuracy of remaining time estimation deteriorates
Solution Approach 1:
The system performs preliminary determination of current drain requirements based on historical device function data before estimating remaining time. By pre-calculating and storing current drain characteristics for different operating modes (sensor operation, processing burden, therapy delivery), the system establishes a foundation for accurate time estimation without adding complex real-time computation
Solution Approach 2:
The system uses historical device function data as feedback to continuously refine current drain determination. By analyzing past operating patterns and actual power consumption, the system adjusts its estimation algorithm to improve accuracy over time while maintaining a manageable level of complexity
2Reliability
If no estimation method is implemented, then the device operation remains simple, but the reliability of device functionality deteriorates due to unpredictable failure
Solution Approach 1:
The system provides advance estimation of remaining time between voltage levels, enabling proactive scheduling of power source replacement or recharging. This preliminary warning allows clinicians and users to plan ahead, preventing unexpected device failure and ensuring continuous reliable operation
Solution Approach 2:
The system automatically monitors its own power consumption patterns and generates reliability assessments without external intervention. By self-evaluating current drain based on historical data and operating modes, the device provides autonomous reliability monitoring and timely warnings
Data Source
AI summary
A medical device system and method estimate a time from a first voltage of a power source of a medical device to a second voltage of the power source. The medical device includes a sensor coupled to the power source for generating a physiological signal. The medical device system determines a current drain from the power source required for generating the physiological signal and/or processing the physiological signal for detecting events from the physiological signal. A processor of the medical device system is configured to estimate the time from the first voltage of the power source until the second voltage based on at least the determined current drain.