Defibrillator CPR Interleaving ECG Analysis Algorithm
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current defibrillators require periodic 'hands-off' periods during cardiopulmonary resuscitation (CPR) to analyze for shockable rhythms, leading to delays in treatment and potential reduction in successful resuscitation chances due to noise artifacts from CPR, and existing solutions are computationally intensive or lack accuracy.
Innovation Solution
A medical apparatus that interleaves continuous and scheduled CPR modes, using an ECG analysis algorithm to identify shockable rhythms amidst CPR noise, allowing for immediate defibrillation during continuous mode and uninterrupted CPR in scheduled mode, with a processor-controlled user interface for efficient shock delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodic hands-off periods are implemented for ECG analysis during CPR, then measurement precision of shockable rhythms is improved, but loss of time in treatment delivery increases
Solution Approach 1:
The patent segments the CPR protocol into distinct phases: compression phases where CPR continues uninterrupted, and analysis phases where ECG analysis is performed. This segmentation allows the system to maintain high measurement precision during dedicated analysis windows while minimizing overall treatment delay by keeping compressions going during other phases.
Solution Approach 2:
The system performs preliminary ECG analysis during compression phases to identify shockable rhythms before the designated analysis phase. This preliminary detection allows the system to be ready for immediate shock delivery when the analysis phase begins, reducing the effective treatment delay.
2Measurement precision
If CPR is interrupted for ECG analysis, then measurement precision of cardiac rhythm is improved, but reliability of resuscitation decreases
Solution Approach 1:
The patent maintains continuity of CPR compressions during most phases of operation, interrupting them only briefly for ECG analysis when a shockable rhythm is detected. This continuous approach to CPR maintains blood flow and oxygenation, improving resuscitation reliability while still allowing periodic analysis for accurate rhythm detection.
Solution Approach 2:
The system uses feedback from continuous ECG monitoring during CPR to dynamically adjust the protocol. When arrhythmia is detected, the system provides feedback to switch to analysis mode; when normal rhythm is confirmed, it provides feedback to resume full CPR, creating a responsive system that balances monitoring accuracy with resuscitation effectiveness.
3Measurement precision
If noise artifacts from CPR are filtered out, then measurement precision of ECG signal is improved, but device complexity increases
Solution Approach 1:
The patent implements periodic ECG analysis at specific intervals during CPR rather than continuous analysis. This periodic approach reduces the computational burden and complexity of noise filtering algorithms while still achieving sufficient signal quality for accurate rhythm detection at critical decision points.
Solution Approach 2:
The system changes analysis parameters dynamically based on the CPR phase and detected signal characteristics. During compression phases, analysis parameters are optimized for motion artifact rejection, while during analysis phases, parameters are optimized for rhythm detection, reducing overall processing complexity through adaptive parameter selection.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A defibrillator and method for using a defibrillator which adopts an ECG analysis algorithm that can detect a cardiac arrhythmia in the presence of noise artifact induced by cardio pulmonary resuscitation (CPR) compressions. The apparatus and method provides both of a continuous and scheduled mode of operation for interleaving periods of CPR with electrotherapy, in a manner that improves the effectiveness of the rescue, resulting in more CPR "hands-on" time, better treatment of refibriUation, and reduced transition times between CPR and electrotherapy.