CPR Sensor Device Using Motion Detection and Smartphone Feedback
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Solution Overview
Problem
Current sensor devices for cardiac arrest resuscitation are complex, require prior medical knowledge, and are not suitable for untrained lay rescuers, leading to inefficient and often ineffective first aid measures due to high training requirements and lack of intuitive handling.
Innovation Solution
A compact, user-friendly sensor device with a rigid housing, motion sensors, and wireless data transfer, designed for untrained lay rescuers, which provides real-time feedback and guidance on chest compression depth and frequency, allowing immediate and effective lifesaving measures during cardiac arrest.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If professional medical systems with defibrillators and mobile display units are used, then measurement precision and reliability of resuscitation data are improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent extracts only the essential measurement function from complex medical systems. A simple ruler marked with compression depth indicators is used instead of sophisticated sensors, and a mobile phone camera captures the ruler position to determine compression depth. This separates the measurement function from the complex defibrillator and display unit systems.
Solution Approach 2:
The patent introduces a mobile phone as an intermediary device between the simple ruler and the resuscitation guidance system. The camera captures images of the ruler, and image processing algorithms automatically determine compression depth, replacing complex direct measurement sensors with a smartphone-based intermediary solution.
2Reliability
If professional medical systems with multiple components are deployed, then reliability of resuscitation support is improved, but ease of operation and accessibility for lay rescuers deteriorate
Solution Approach 1:
The patent makes the mobile phone serve multiple functions: it acts as a camera to capture ruler images, processes images to determine compression depth, provides real-time feedback to the rescuer, and guides the resuscitation process. This universal use of a common device eliminates the need for specialized equipment while maintaining reliability.
Solution Approach 2:
The system uses the rescuer's own mobile phone rather than requiring external professional equipment. The phone's existing camera and processing capabilities are leveraged, making the system self-sufficient and accessible to any lay rescuer with a smartphone, eliminating dependence on complex external systems.
3Measurement precision
If complex medical systems are used, then accuracy of resuscitation monitoring is improved, but response time and productivity deteriorate due to training requirements
Solution Approach 1:
The patent prepares a ruler with pre-marked compression depth indicators before the emergency occurs. The measurement scale is pre-calibrated and ready for immediate use, eliminating the need for complex setup or calibration procedures during the emergency. The mobile phone's camera and image processing capabilities are also pre-configured to automatically measure compression depth.
Solution Approach 2:
The patent replaces complex mechanical sensors and electronic measurement systems with a simple visual ruler and optical camera-based measurement. The mobile phone camera captures images of the ruler, and software algorithms automatically calculate compression depth, replacing sophisticated mechanical measurement devices with an optical-computational approach that is faster to deploy.
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
Enables untrained individuals to perform guided first aid with high accuracy and efficiency, reducing the risk of irreversible brain damage and improving survival rates by providing intuitive and immediate feedback on CPR quality.
Implementation Method 1
at least one motion sensor arranged within the housing body, in that the at least one motion sensor is configured to detect the motion of the housing body during thoracic compressions
Data Source
AI summary
The invention relates to a sensor device for capturing data when carrying out first aid measures for reanimating a person affected by a cardiac arrest. The sensor device is exactly positioned on the chest of the patient by means of a positioning-aid apparatus (5) and affixed by means of a fastening means (2). The thorax compressions, i.e., the pressing-in depth and compression frequency, are detectable by means of a motion sensor. A data-transfer interface allows communication, e.g. wireless communication, with a mobile terminal.