Electrochromic Defibrillator Pads for Dynamic CPR Guidance
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Solution Overview
Problem
Conventional defibrillation electrode pads have static graphics that do not change during use, limiting their ability to provide dynamic instructions or warnings to responders, especially during CPR when the user's focus is on chest compressions and may interfere with the defibrillator's analysis of the patient's heart rhythm.
Innovation Solution
Incorporating electrochromic layers into the electrode pads that can change from an opaque to a transparent state when activated, allowing for the combination or alteration of graphics displayed on the pad's surface, enabling dynamic display of instructions such as 'do not touch the patient' or 'perform CPR' by controlling the electrochromic layers with a defibrillator controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static graphics are used on electrode pads, then the device structure remains simple, but the ability to provide dynamic instructions or warnings is limited
Solution Approach 1:
The patent applies electrochromic layers that can dynamically change their optical properties (from transparent to opaque) in response to electrical signals from the defibrillator controller. This enables the electrode pad graphics to dynamically display different instructions and warnings based on the device's operational state, resolving the contradiction between structural simplicity and dynamic functionality.
Solution Approach 2:
The electrochromic layers change their optical appearance (from transparent to opaque) when activated by electrical signals. This color/optical property change allows the same physical graphic to convey different information states, enabling dynamic instructions without adding complex mechanical or electronic display components to the pad structure.
2Loss of information
If the user checks the defibrillator screen for instructions, then the information can be comprehensive, but the user must stop CPR which interrupts treatment
Solution Approach 1:
The electrode pad acts as an intermediary display medium between the defibrillator controller and the user. By projecting critical instructions directly onto the pad surface through electrochromic layers, the system eliminates the need for the user to divert attention to the main screen, allowing continuous CPR while receiving guidance through the pad's visual feedback.
Solution Approach 2:
The critical instructions are pre-positioned on the electrode pad itself rather than requiring the user to search through menus or screens during the emergency. The electrochromic layers are configured to display specific warnings and instructions at predetermined locations on the pad, ensuring immediate visibility without interrupting the treatment flow.
3Illumination intensity
If the electrochromic layer is opaque, then the second graphic is visible, but the first graphic is hidden
Solution Approach 1:
The electrochromic layer dynamically switches between opaque and transparent states based on the defibrillator's operational phase. During CPR instructions, it becomes opaque to display the second graphic (CPR warning). During rhythm analysis, it becomes transparent to reveal the first graphic (shock delivery instruction). This dynamic state change allows both graphics to be visible at appropriate times without physical overlap.
Solution Approach 2:
The electrochromic layer alternates between opaque and transparent states in periodic cycles corresponding to the defibrillator's treatment protocol phases. The layer transitions to transparent state during rhythm analysis periods to show the first graphic, and switches to opaque state during CPR instruction periods to show the second graphic, creating a periodic display cycle that delivers different information at different treatment stages.
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 the display of dynamic and attention-catching instructions directly on the electrode pads, improving user safety by providing critical information without requiring the responder to stop CPR or check the defibrillator screen, thereby enhancing the usability and safety of AEDs during emergency cardiac incidents.
Implementation Method 1
the controllable layer is an electrochromic layer that includes an electrochromic material
Data Source
AI summary
A variety of graphically responsive defibrillation electrode pads are described that can selectively display different images during use. The graphically responsive pads include a base electrode pad structure, at least two graphics, and one or more controllable layers that have multiple states. In some embodiments, the controllable layer incorporates an electrochromic material. In a first (opaque) state, the controllable layer hides the first graphic such that only the second graphic is visible to a user on the back side of the defibrillation electrode pad. When the controllable layer transitions to a second (transparent) state, the first graphic is made visible to thereby cause a composite image that combines the first and second graphics to be visible on the back side of the pad. In some embodiments, the electrochromic layer defaults to the opaque state when no power is applied to the electrochromic layer.