Capacitive Sensor Readiness Detection for Medical Device Accessories
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Solution Overview
Problem
Existing medical devices rely on expiration dates to determine the readiness of disposable accessory devices, which can lead to incorrect estimations due to storage conditions, resulting in either unnecessary discarding of usable devices or the use of expired devices in emergency situations.
Innovation Solution
Integration of sensors into disposable accessory devices, such as capacitive sensors in electrode pads, to detect their own readiness by measuring electrical characteristics, and the use of memory chips to store readiness information and expiration dates, allowing for self-testing and correct identification of device readiness before use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If expiration dates are used to determine accessory device readiness, then device readiness can be determined without additional sensors, but the accuracy of readiness determination deteriorates due to storage condition variations
Solution Approach 1:
The accessory device performs self-testing of its own readiness status through integrated sensors that monitor functional characteristics (electrical conductivity, capacitance, impedance) and communicate this information to the medical device, eliminating reliance on external expiration date tracking alone
Solution Approach 2:
The patent replaces the mechanical/calendar-based expiration date system with an electrical sensing system that actively measures functional properties of the accessory device to determine readiness, substituting physical time-based tracking with electrical property monitoring
2Measurement precision
If sensors are integrated into disposable accessory devices to detect readiness, then readiness determination accuracy improves, but device complexity increases
Solution Approach 1:
The patent integrates simple, low-cost sensors into disposable accessory devices that are designed for single use, accepting the increased complexity in exchange for improved readiness determination, with the understanding that the disposable nature eliminates the need for long-term maintenance or calibration
Solution Approach 2:
The integrated sensors serve multiple functions: monitoring readiness status, detecting storage condition degradation, and providing communication between the accessory device and medical device, consolidating multiple monitoring capabilities into a single integrated system
3Reliability
If sensors continuously monitor accessory device readiness, then reliability of device functionality improves, but energy consumption increases
Solution Approach 1:
The sensor system performs periodic readiness checks rather than continuous monitoring, measuring functional characteristics at intervals or upon activation, which maintains reliability by detecting degradation events while significantly reducing overall energy consumption compared to continuous operation
Solution Approach 2:
The system uses feedback communication where the accessory device reports its readiness status to the medical device, allowing the medical device to adjust its operation based on the accessory's condition, enabling reliable operation with intermittent sensing rather than continuous monitoring
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
Ensures that only ready and functional disposable accessory devices are used, reducing the risk of malfunctions and adverse consequences in emergency situations, while also preventing the unnecessary disposal of still usable devices.
Implementation Method 1
the sensor is configured to detect a capacitance of a capacitor including the electrode, the gel, and the conductive trace
Data Source
AI summary
Techniques for detecting the readiness of an accessory device for use with a medical device are described. An example method includes detecting a capacitance of a capacitor including an electrode, a gel disposed on the electrode, and a conductive trace embedded in a plug. The plug is configured to couple to a medical device. A readiness of a medical device accessory is determined by analyzing the capacitance. The example method further includes outputting an indication of the readiness.