AED Shock Timing via Motion and ECG Analysis
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Solution Overview
Problem
Current automated external defibrillators (AEDs) are passive and may not deliver a shock if CPR is not being performed, potentially reducing the chances of survival for individuals experiencing cardiac events due to inefficient or absent chest compressions.
Innovation Solution
A semi-automatic or fully-automatic AED system that analyzes ECG signals and motion sensors to determine if chest compressions are being performed, and if not, interrupts the CPR protocol to deliver a shock or schedule it appropriately, ensuring timely defibrillation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If AED delivers shock immediately when shockable rhythm is detected, then survival chance is improved, but user safety deteriorates if user is still in contact with individual
Solution Approach 1:
The AED performs preliminary analysis of motion signals before delivering shock to determine whether the user is in contact with the individual. This preliminary check allows the system to prepare for shock delivery while ensuring safety conditions are met, resolving the contradiction between immediate shock delivery and user protection
2Object-affected harmful factors
If AED waits for CPR protocol completion before shock, then user safety is improved, but survival chance deteriorates if CPR is not being performed
Solution Approach 1:
The AED dynamically adjusts its shock delivery decision based on real-time motion detection. When motion consistent with CPR is detected, the system waits for protocol completion; when no motion is detected, the system proceeds with shock delivery. This dynamic adaptation resolves the contradiction between safety through protocol completion and timely intervention
3Productivity
If AED is fully automatic to improve response time, then productivity is improved, but device complexity increases
Solution Approach 1:
The AED performs self-monitoring through motion sensors to automatically detect whether CPR is being performed and whether it is safe to deliver shock. This self-service capability enables fully automatic operation without requiring additional manual assessment by the user, achieving both rapid response and manageable complexity
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
This solution enhances user safety and increases the likelihood of survival by ensuring timely defibrillation even if CPR is not being performed correctly or is absent, addressing the limitations of passive AEDs.
Implementation Method 1
The AED receives an ECG signal from the individual and analyzes the signal to determine whether the individual could benefit from a shock delivered from the AED
Implementation Method 2
The AED receives a signal indicative of motion or lack of motion of the individual, and the AED analyzes the signal to determine whether the individual is undergoing motion
Implementation Method 3
the AED charges itself to deliver the high-voltage shock, and then instructs the user to press a button causing the device to deliver the defibrillation shock
Data Source
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AI summary
A method (100) for using an automated external defibrillator (AED) (310), the method comprising: receiving (120), during an active CPR protocol, a signal indicative of motion or lack of motion of the individual; analyzing (130), by the controller, the received signal to determine whether the individual is undergoing motion; providing (140) a direction to begin or continue chest compressions if the controller determines from the received signal that the individual is not undergoing motion; analyzing (150), by the controller, a received ECG signal to determine whether the individual could benefit from a shock delivered from the AED; intermpting (160) the active CPR protocol, if the individual is not undergoing motion and if the individual could benefit from a shock delivered from the AED; and delivering (170) a shock to the individual.