Reusable Medical Device Thermal-Cycle Logging with RTC Timestamps
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Solution Overview
Problem
Existing reprocessing methods for reusable medical devices lack efficient and reliable documentation of thermal stress and reprocessing cycles, leading to administrative challenges and uncertainty in maintenance scheduling.
Innovation Solution
A method and assembly for reusable medical devices that utilize temperature sensors and a real-time clock (RTC) to monitor and document reprocessing cycles by switching between low-power and active modes, capturing timestamps at predefined temperature thresholds, allowing precise documentation of reprocessing durations and conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a documentation unit continuously monitors and records reprocessing data, then measurement precision and reliability of documentation are improved, but power consumption increases significantly
Solution Approach 1:
The documentation unit operates periodically rather than continuously, switching between active and low-power states based on temperature threshold crossings. The unit activates only when temperature exceeds a first threshold (entering reprocessing) or falls below a second threshold (exiting reprocessing), thereby reducing power consumption while maintaining accurate documentation of reprocessing cycles.
Solution Approach 2:
The system uses the medical device's own temperature sensor data to automatically trigger documentation unit activation and deactivation without external control. The temperature thresholds are predefined, and the documentation unit self-regulates its power state based on real-time temperature monitoring, eliminating the need for continuous external power supply or manual intervention.
2Reliability
If the documentation unit remains active throughout the reprocessing cycle, then all reprocessing data is captured accurately, but the complexity of power management increases
Solution Approach 1:
The documentation unit receives feedback from the temperature sensor about the current temperature state and adjusts its power state accordingly. When temperature exceeds the first threshold, the unit activates to begin documentation; when temperature falls below the second threshold, it deactivates. This feedback mechanism ensures reliable documentation while simplifying power management through automatic state transitions.
Solution Approach 2:
The system pre-defines temperature thresholds that trigger documentation unit activation before actual data recording begins. The first threshold is set to activate the documentation unit when reprocessing starts, and the second threshold is set to deactivate it when reprocessing ends, ensuring all relevant data is captured without requiring complex real-time decision-making.
3Measurement precision
If multiple temperature thresholds are used to document reprocessing phases, then measurement precision of reprocessing conditions is improved, but the number of components and control logic increases
Solution Approach 1:
Different temperature thresholds are applied at different stages of the reprocessing cycle to capture specific phase information. The first threshold identifies when reprocessing begins (temperature rise phase), and the second threshold identifies when it ends (temperature fall phase). This localized threshold approach provides precise documentation of reprocessing conditions without requiring complex control logic for each phase.
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 accurate and efficient documentation of reprocessing cycles, facilitating maintenance decisions by providing detailed thermal history, reducing administrative effort, and ensuring reliable device condition assessment.
Implementation Method 1
at least one temperature sensor configured to provide temperature data representing a temperature of the medical device
Data Source
AI summary
A method for documenting a reprocessing of a reusable medical device. The reusable device comprising at least one temperature sensor configured to provide temperature data representing a temperature of the medical device, a real time clock (RTC) configured to provide timestamps and one or more processors including hardware configured to process the temperature data and the timestamps. The method includes: monitoring the temperature of the medical device during the reprocessing; and a) upon detecting the temperature exceeding a first predefined threshold, the one or more processors receiving and saving a first current timestamp provided by the RTC, and setting the one or more processors into a low-power mode, and b) upon detecting the temperature falling below a second predefined threshold, setting the one or more processors into an active mode, and the one or more processors receiving and saving a second current timestamp provided by the RTC.