Cardiopulmonary Compression Deflection Compensation
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Solution Overview
Problem
Mechanical cardiopulmonary resuscitation devices often fail to deliver the specified chest compression depth due to structural deflection and strap-related issues, leading to inadequate perfusion and adverse patient outcomes.
Innovation Solution
A cardio-pulmonary compression system with feedback sensors and a control unit that dynamically adjusts operating parameters to ensure consistent and reliable compression depth, using a dynamic adjustment module to compensate for variable structural deflections and lift-off, by correlating sensor data with a reference index and adjusting mechanisms accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If high compression forces are applied to achieve adequate perfusion depth, then compression effectiveness is improved, but structural deflection of the support structure and backboard increases, reducing actual compression depth
Solution Approach 1:
The patent employs feedback mechanisms where sensors monitor the actual compression depth and force applied, and the control system adjusts the compressor stroke and positioning in real-time to compensate for structural deflection. This closed-loop control ensures that the intended compression depth is achieved despite the backboard and structure bending under high compression forces.
Solution Approach 2:
The system dynamically adjusts the compression parameters during operation. The control system modifies the compressor stroke length and positioning based on real-time measurements of structural deflection, allowing the system to adapt to varying compression forces and maintain accurate compression depth throughout the CPR process.
2Ease of operation
If the chest compressor is directly supported by the patient's chest using flexible straps, then device portability and ease of use are improved, but the chest compressor may lift off the patient's chest during compression, reducing compression depth
Solution Approach 1:
Sensors detect when the chest compressor lifts off the patient's chest during compression cycles, and the control system responds by adjusting the strap tension or compressor positioning to maintain contact. This feedback loop ensures reliable compression depth consistency while preserving the portability benefits of the strap-based mounting system.
Solution Approach 2:
The system dynamically adjusts strap tension and compressor positioning during operation to prevent lift-off. The control system monitors compression effectiveness and modifies restraining forces in real-time to maintain reliable contact between the compressor and patient's chest throughout the CPR procedure.
3Device complexity
If the chest compressor stroke is tightly controlled by the drive mechanism, then device simplicity is improved, but actual compression depth is reduced due to mechanical deflection of the support structure
Solution Approach 1:
The patent introduces feedback sensors that measure actual compression depth and structural deflection, with the control system using this information to compensate for deflection effects. This maintains relatively simple device architecture while achieving accurate compression depth through intelligent control algorithms that adjust for mechanical deflection in real-time.
Data Source
AI summary
A cardio-pulmonary compression system includes a compression device (110), a supporting mechanism (120) coupled to the compression device and a feedback sensor (104) configured to measure interactions between a patient and the compression device. A control unit (112) is configured to receive input from the feedback sensor and adjust operating parameters of the compression system to meet a target parameter during operation of the compression device.