Predictive Failure Warning Indicator for Emergency Medical Devices
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Solution Overview
Problem
Current emergency medical devices lack advanced warning of pending failures, relying solely on Boolean readiness indicators that fail to detect conditions indicating subsystems are likely to fail in the near future, leading to unnecessary service disruptions and false failures.
Innovation Solution
Incorporating a predictive failure analysis within the emergency medical device to detect conditions indicative of likely operational failures by actuating a failure warning indicator based on premature degradation, repeated error occurrences, and shortened component life, using a controller to conditionally generate both device readiness and failure warning indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a Boolean device readiness indicator is used to indicate operational readiness, then the device can clearly show whether it is ready-for-use, but it cannot provide advanced warning of pending failures and may produce false failure indications
Solution Approach 1:
The device readiness indication system is segmented into multiple independent indicators: a device readiness indicator for current operational status and a separate failure warning indicator for pending failures. This segmentation allows each indicator to serve its specific function without the limitations of a single Boolean indicator, enabling the system to provide both current status and predictive information simultaneously.
Solution Approach 2:
The failure warning indicator provides preliminary action by alerting users to conditions that indicate likely operational failure in the near future, before the actual failure occurs. This allows maintenance to be performed proactively rather than reactively, preventing false failures and ensuring device availability when needed.
2Productivity
If self-tests are performed with hard functional limits to determine pass/fail results, then the device can quickly assess operational readiness, but it cannot detect marginal conditions that indicate future failures
Solution Approach 1:
The system applies different evaluation criteria to different aspects of self-test results. Hard functional limits are applied to determine immediate operational readiness (pass/fail), while separate analysis tracks marginal conditions and trends that indicate future failures. This local differentiation of quality standards allows rapid assessment while maintaining sensitivity to emerging problems.
Solution Approach 2:
The system implements continuous feedback monitoring of self-test results, tracking marginal conditions over time rather than treating each test result as an isolated event. This feedback mechanism allows the system to distinguish between temporary anomalies and progressive degradation, improving failure detection accuracy without sacrificing test execution speed.
3Reliability
If marginal test results are characterized as failures to ensure device safety, then false failures may occur that needlessly take a functioning device out of service, but characterizing them as passes may risk using a failing device
Solution Approach 1:
The system dynamically adjusts the interpretation of test results based on historical data and trends. Rather than applying a static pass/fail threshold, the system considers the progression of test results over time, allowing marginal results to be evaluated in context. This dynamic approach prevents premature device removal while maintaining safety through continuous monitoring.
Solution Approach 2:
The failure warning indicator enables preliminary maintenance action before actual failures occur. By identifying marginal conditions that indicate future failures, the system allows scheduled maintenance to be performed during non-critical periods, preventing unexpected failures while avoiding unnecessary service interruptions for temporarily marginal devices.
Data Source
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AI summary
An emergency medical device (20) (e.g., an external defibrillator/monitor) employing an emergency medical subsystem (21) for executing an emergency medical procedure (e.g., a monitoring subsystem (21) and a therapy subsystem (21)), and an emergency medical controller (23) for controlling an activation of the emergency medical subsystem (21). The subsystem (21) includes one or more operational components (22). In operation, the controller (23) conditionally actuates a device readiness indicator (24) (e.g., auditory or visual) indicative of an operational readiness of the operational component(s) (22), and conditionally actuates a failure warning indicator (25) (e.g., auditory or visual) indicative of a pending failure of the operational readiness of the operational component(s) (22). The failure warning indicator (25) may be actuated based on a predictive failure analysis of a premature degradation of the operational component(s) (22), a repeated occurrence of error conditions of the operational component(s) (22) (particularly recoverable error conditions), and a shortened reliable life of the operational component(s) (22).