Dynamic CPR System Adjusting Compression via Physiological Feedback
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Solution Overview
Problem
Manual cardiopulmonary resuscitation (CPR) can be ineffective due to rescuer fatigue and lack of adherence to recommended compression parameters, leading to inadequate blood circulation and potential organ damage.
Innovation Solution
A mechanical CPR system that dynamically adjusts compression parameters based on physiological signals, using a processor-controlled compression mechanism with sensors to optimize frequency, depth, and duty cycle, and includes an auxiliary compression mechanism to enhance blood flow and patient comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual CPR is performed, then rescuers can provide immediate care, but effectiveness degrades due to fatigue and inability to maintain proper compression parameters
Solution Approach 1:
The patent replaces the manual mechanical system of chest compressions with an automated mechanical CPR device that uses a motor-driven piston to deliver consistent, controlled compressions. This substitution eliminates human fatigue and ensures reliable maintenance of compression parameters over extended periods, directly resolving the contradiction between immediate care capability and sustained effectiveness.
Solution Approach 2:
The CPR device incorporates sensors that automatically detect chest wall characteristics and physiological parameters, then self-adjust compression depth, rate, and duration without requiring continuous human intervention or monitoring. This self-service capability maintains optimal CPR effectiveness throughout the resuscitation process, addressing the duration-related degradation of manual CPR quality.
2Ease of operation
If fixed compression parameters are used, then CPR can be standardized, but cannot adapt to individual patient variations and changing physiological states
Solution Approach 1:
The patent implements dynamic adjustment of compression parameters by integrating sensors that continuously monitor chest wall impedance, respiratory patterns, and hemodynamic indicators. The control system processes these signals in real-time to automatically modify compression depth, rate, and duration, enabling the device to adapt to individual patient anatomy and changing physiological states while maintaining standardized operational protocols.
Solution Approach 2:
The system incorporates feedback loops where sensor data from the patient's chest and physiological monitors are continuously fed back to the control algorithm. This feedback mechanism allows the device to detect changes in patient condition (such as return of spontaneous circulation or changes in chest wall compliance) and automatically adjust compression parameters accordingly, resolving the contradiction between standardization and adaptability.
3Productivity
If high compression frequency and depth are maintained, then blood circulation is improved, but patient discomfort and potential tissue damage increase
Solution Approach 1:
The patent utilizes real-time changes in compression parameters (depth, rate, duration) based on sensor feedback to optimize the balance between circulation efficiency and tissue safety. The system adjusts parameters dynamically rather than maintaining fixed high-intensity compressions, allowing effective blood flow generation while minimizing harmful effects through precise control of mechanical stress on chest tissues.
Data Source
AI summary
A CPR system includes a retention structure to retain the patient's body, and a compression mechanism to perform CPR compressions to the patient's chest. The CPR system further includes a processor to control the compression mechanism, and thus the performance of the CPR compressions. In embodiments, the CPR system compresses at a rate or frequency that is varied based on feedback gathered from physiological sensors that detect physiological characteristics of the patient during treatment.