Myocardial Wall Movement Detection for CPR Perfusion Guidance
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Solution Overview
Problem
Current CPR methods lack effective means to determine when to continue or stop chest compressions during cardiopulmonary resuscitation, particularly in cases of pulseless electrical activity (PEA), which can lead to detrimental continuation of CPR after restoration of cardiac mechanics.
Innovation Solution
A system comprising sensors and processors that measure intrinsic myocardial wall movement and correlate it with ECG signals to determine if the movement is indicative of perfusion, providing feedback to rescuers on whether to continue or stop chest compressions, synchronize with cardiac systole, or modify ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CPR is continued without monitoring myocardial movement, then continuous blood flow is maintained, but detrimental CPR continues after restoration of cardiac mechanics
Solution Approach 1:
The system provides real-time feedback to rescuers about the presence of myocardial contractions capable of perfusion. Sensors continuously monitor intrinsic myocardial wall movement and correlate it with ECG signals, providing immediate information that guides the decision to continue or stop CPR, thereby resolving the contradiction between maintaining continuous monitoring and avoiding detrimental CPR
Solution Approach 2:
The patent introduces an intermediary feedback system that mediates between the complex physiological state of the heart and the simple binary decision of continuing or stopping CPR. The system translates complex myocardial movement patterns into clear indicators that guide rescuer decisions, making the monitoring process accessible and actionable
2Productivity
If standard CPR is administered without synchronization, then continuous compressions are delivered, but synchronization with cardiac systole could improve perfusion
Solution Approach 1:
The system performs preliminary detection of myocardial contractions and prepares synchronization guidance before CPR is administered. By detecting intrinsic myocardial wall movement and correlating it with ECG signals in advance, the system can guide rescuers to synchronize compressions with cardiac systole, improving perfusion efficiency without adding complexity during the actual CPR delivery
Solution Approach 2:
Real-time feedback about detected myocardial contractions enables dynamic synchronization of CPR compressions with cardiac systole. The system continuously monitors and provides guidance on optimal compression timing, allowing rescuers to improve perfusion efficiency while maintaining ease of operation through simple follow-the-guidance protocols
3Measurement precision
If CPR is stopped based on ECG alone, then equipment simplicity is maintained, but accurate detection of perfusion capability is insufficient
Solution Approach 1:
The system merges multiple detection modalities including ECG signals, accelerometer data from CPR sensors, and intrinsic myocardial wall movement detection. By combining these different measurement approaches, the system achieves high precision in detecting perfusion capability while distributing the complexity across multiple established technologies rather than requiring a single complex system
Solution Approach 2:
The patent employs universal sensors and processing techniques that can detect multiple physiological parameters simultaneously. The same sensor system used for standard CPR monitoring can also detect intrinsic myocardial wall movement and correlate it with ECG signals, achieving enhanced measurement precision without proportionally increasing device complexity
Data Source
AI summary
A system for assisting with a cardiopulmonary resuscitation (CPR) treatment being administered to a patient. In one aspect, the system includes electrodes to provide an ECG signal of the patient, one or more sensors configured to measure an intrinsic myocardial wall movement of the patient, and one or more processors. The one or more processors are configured to perform operations including: during the CPR treatment being administered to the patient, receiving an input from the sensor(s), processing the input from the sensor(s) and the ECG signal, determining, based on processing, whether the intrinsic myocardial wall movement is indicative of a perfusion movement of the patient's heart, and providing an indication to a user of the system based on the determination.