De-Energizable AED Relay Assembly for Pocket-Size Readiness
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Solution Overview
Problem
Conventional AEDs are bulky, costly, and prone to failure due to constant power usage, complex design, and susceptibility to cosmic radiation, making them impractical for widespread personal use and ineffective in addressing sudden cardiac arrest outside public access locations.
Innovation Solution
A pocket-sized, disposable AED with de-energizable circuitry that isolates electrical components when not in use, using a magnetically triggered reed switch or mechanical interlock to prevent wear and reduce computational errors, allowing intuitive and rapid deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional AEDs use constant power usage and integrated telemetry for multi-use readiness checks, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements periodic self-testing at predetermined intervals rather than constant monitoring. The microcontroller activates the capacitor and measures voltage decay only at scheduled times, reducing power consumption and component wear while maintaining reliability through regular checks.
Solution Approach 2:
The patent describes a disposable AED design where the entire device is discarded after a single use or predetermined number of uses. This eliminates the need for complex rechargeable battery systems, multiple capacitor cycles, and long-term durability features, significantly reducing device complexity and cost while ensuring reliability for the intended usage period.
2Reliability
If conventional AEDs are designed for reusability with integrated telemetry, then reliability is improved, but weight and size increase
Solution Approach 1:
The disposable design eliminates heavy rechargeable lithium-ion batteries, robust protective casings, and integrated telemetry systems required for reusable devices. The AED uses a simple non-rechargeable battery and basic voltage measurement circuitry, reducing weight to under 1 pound while maintaining reliability for single-use applications.
Solution Approach 2:
The patent removes integrated telemetry, rechargeable battery management systems, and complex protective features from the design. Only essential components for defibrillation delivery and basic self-testing remain, significantly reducing weight and size while preserving core reliability functions.
3Reliability
If conventional AEDs perform constant self-testing, then reliability is improved, but loss of energy increases
Solution Approach 1:
The microcontroller performs self-testing at predetermined intervals by activating the capacitor and measuring voltage decay. This periodic approach rather than continuous monitoring significantly reduces battery depletion while ensuring the AED is ready when needed through regular verification checks.
Solution Approach 2:
The AED automatically performs self-testing without external intervention or constant power input. The system uses its own stored energy to conduct periodic checks and can detect its own readiness status, minimizing external energy requirements while maintaining reliability verification.
4Reliability
If conventional AEDs use complex circuits to survive constant testing, then reliability is improved, but device complexity increases
Solution Approach 1:
The disposable design allows use of simpler, less durable components that would normally be considered unreliable for long-term use. The capacitor, battery, and circuitry are designed for single-use or limited-use applications, eliminating the need for complex protective circuits, temperature compensation, and long-term durability features.
Solution Approach 2:
Components undergo stress testing only at predetermined intervals rather than constant operation. The capacitor is charged and discharged periodically during self-tests rather than continuously, reducing wear and allowing simpler component specifications while maintaining reliability through regular verification.
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
The solution ensures reliable, affordable, and compact AEDs that can be carried by individuals, reducing the risk of failure and enabling immediate use, thereby increasing accessibility and survival chances in cardiac emergencies.
Implementation Method 1
using a magnetically triggered reed switch or mechanical interlock to prevent wear and reduce computational errors
Data Source
AI summary
A completely de-energizable defibrillator is provided, allowing the electrical components of the defibrillator to be electrically unbiased while the defibrillator is not in use. The energizing of the defibrillator can be controlled through a power switch interfaced to a relay, with the microcontroller of the AED being able to de-energize the circuitry in case of unintended activation. Additionally, the microcontroller unit of the AED includes features to prevent computational errors due to external influences, electromagnetic interference, radio frequency interference, ionizing radiation, high energy particles, cosmic radiation, and/or solar radiation, or a combination thereof, including one or more pairs of lockstep processors, error detection code, and features that prevent tampering with the microcontroller.