Case-Opening Energization for Compact Defibrillation Assemblies
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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 outside public access locations, leading to high mortality rates due to delayed or incorrect use by untrained rescuers.
Innovation Solution
A compact, pocket-sized, single-use AED with de-energizable circuitry that includes a mechanical switch to isolate energy storage from circuitry when not in use, reducing wear and computational errors, and features intuitive deployment mechanisms to ensure rapid and reliable operation by non-medical rescuers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional AEDs are designed for reusability with integrated telemetry and constant readiness checks, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The AED is divided into separate functional modules: a reusable controller unit and disposable electrode pads with integrated energy storage. This segmentation allows the complex telemetry and control functions to be isolated in the reusable unit while the disposable portion remains simple and reliable.
Solution Approach 2:
The electrode pads are designed as disposable single-use components that are discarded after one use. This eliminates the need for complex maintenance, testing, and reliability verification of the energy storage and electrode components, as they are replaced rather than reused.
2Ease of operation
If AEDs are designed to be pocket-sized and lightweight, then ease of operation and accessibility are improved, but energy storage capacity and reliability deteriorate
Solution Approach 1:
The system separates the lightweight portable controller from the heavier energy storage components located in the disposable electrode pads. This allows the user-carrying unit to remain pocket-sized while the full energy capacity is available in the replaceable pads.
Solution Approach 2:
The electrode pads are pre-charged with defibrillation energy before use and sealed in protective packaging. This preliminary charging eliminates the need for on-site charging infrastructure and ensures immediate readiness upon activation.
3Reliability
If AED circuitry remains constantly energized for readiness checks, then reliability is improved, but energy consumption and component wear increase
Solution Approach 1:
The AED performs self-diagnostics and readiness checks periodically rather than continuously. The controller unit activates the electrode pads only when needed for potential defibrillation, allowing components to remain in low-power or dormant states between uses.
Solution Approach 2:
The electrode pads contain built-in circuitry that automatically detects when they are properly attached to the patient and when defibrillation is needed, eliminating the need for continuous monitoring and manual activation by rescuers.
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 provides a lightweight, affordable, and reliable AED that can be carried by individuals, ensuring immediate availability and effective use in SCA situations, reducing mortality by enabling rapid defibrillation without complex maintenance or training, thus addressing the limitations of conventional AEDs.
Implementation Method 1
a battery disposed within the case and in electrical communication with the control circuitry when the cover is in the removed position
Implementation Method 2
a mechanical switch; an energy storage element that supplies power to the mechanical switch; circuitry configured to generate a defibrillation waveform, wherein the circuitry is isolated from the energy storage element by the mechanical switch
Data Source
AI summary
In one embodiment, a defibrillation assembly energizable through case opening is provided. The defibrillation assembly includes a mechanical switch; an energy storage element that supplies power to the mechanical switch; circuitry configured to generate a defibrillation waveform, wherein the circuitry is isolated from the energy storage element by the mechanical switch; a case within which at least a portion of the circuitry is located, wherein an opening of the case causes the power to flow to the circuitry through the mechanical switch.