Magnetically Triggered AED Assembly for Case-Opening Activation
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Solution Overview
Problem
Conventional public access automated external defibrillators (AEDs) are bulky, costly, and complex, making them impractical for widespread personal use and often unavailable during sudden cardiac arrest (SCA) incidents, which occur predominantly outside public access locations, leading to high mortality rates due to delayed or incorrect use.
Innovation Solution
A compact, pocket-sized, single-use AED with de-energizable circuitry that includes a magnetically triggered reed switch to prevent wear and computational errors, allowing intuitive deployment by non-medical rescuers, reducing size, cost, and maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional public access AEDs are designed for reusability and integrated functionality, then they provide comprehensive defibrillation capabilities, but they become bulky, costly, and complex
Solution Approach 1:
The AED is divided into two separate components: a reusable defibrillator unit and a disposable cartridge containing the capacitor and electrode pads. This segmentation allows the complex high-voltage generation circuitry to be isolated in the reusable unit while the disposable cartridge contains only the energy storage and delivery components, reducing overall system complexity and enabling widespread distribution of the portable unit.
Solution Approach 2:
The cartridge containing the capacitor and electrode pads is designed as a disposable, single-use component. After one defibrillation event, the entire cartridge is discarded and replaced. This eliminates the need for expensive maintenance, calibration, and component replacement, making the AED more cost-effective and suitable for public access deployment.
2Ease of operation
If conventional public access AEDs are made portable, then they can be more accessible, but they remain too bulky for personal pocketability
Solution Approach 1:
By separating the defibrillator into a reusable control unit and a disposable cartridge, the majority of the weight and bulk is concentrated in the single cartridge. The reusable unit becomes compact and lightweight enough for personal carry, while the cartridge serves as a replaceable energy source that doesn't need to be permanently carried.
Solution Approach 2:
The design transitions from a single integrated bulky device to a modular system where the reusable unit can be carried in a pocket or small bag, and the cartridge can be stored separately or attached when needed. This dimensional separation allows the system to be both portable and functional.
3Speed
If AED circuitry remains energized for immediate use, then response time is reduced, but component wear and computational errors increase
Solution Approach 1:
The capacitor within the disposable cartridge is pre-charged to the required voltage during manufacturing or initial activation. When the AED is needed, the charging process has already been completed, and the user simply needs to attach the cartridge and press the shock button. This preliminary charging action eliminates the need for the circuitry to remain continuously energized, reducing wear while maintaining rapid response capability.
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 immediate availability and effective use of AEDs by laypersons, increasing survival chances from SCA by simplifying deployment and reducing wear-related failures, thus addressing the limitations of conventional AEDs.
Implementation Method 1
a magnetically triggered reed switch; a magnet positioned to keep the switch in an open position
Data Source
AI summary
In one embodiment, a defibrillation assembly energizable through case opening is provided. The defibrillation assembly includes an a magnetically triggered reed switch; a magnet positioned to keep the switch in an open position; an energy storage element that supplies power to the magnetically triggered reed switch; circuitry configured to generate a defibrillation waveform, wherein the circuitry is isolated from the energy storage element by the magnetically triggered reed switch; and a case within which at least a portion of the circuitry is located and a comprising a portion connected to the magnet by a mechanical interconnect, wherein an opening of the case displaces the connected case portion, which displaces the magnet far enough to transition the magnetically triggered reed switch into a closed position and causes the power to flow to the circuitry through the magnetically triggered reed switch.