CPR Assist Device Using Electromagnetic Field Sensing
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Solution Overview
Problem
Current CPR technologies, such as those using accelerometers and ultrasound, face challenges in accurately measuring compression depth and rate due to errors from signal drift, external movements, and environmental interference, making them unreliable, especially in non-stationary environments, and are often cumbersome and expensive.
Innovation Solution
A CPR assist device employing a field generator and field detector, which use electromagnetic fields to provide accurate measurements of compression parameters by determining the position of a moving sensor relative to a stationary reference sensor, eliminating errors from external movements and environmental factors, and offering feedback for proper technique.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If accelerometer-based systems are used to measure compression depth, then measurement capability is provided, but measurement precision deteriorates due to signal drift and external movements
Solution Approach 1:
The patent replaces accelerometer-based mechanical sensing with an electromagnetic field-based system. A field generator creates an electromagnetic field, and a field detector measures the field's interaction with the chest during compressions. This substitution eliminates the signal drift and external movement interference problems that plague accelerometer systems, providing more reliable and precise compression depth measurements in non-stationary environments.
2Measurement precision
If ultrasound technology is used for compression measurement, then measurement capability is provided, but device complexity increases and portability decreases
Solution Approach 1:
The patent substitutes complex ultrasound measurement systems with a simpler electromagnetic field-based system. The field generator and field detector provide compression measurements through electromagnetic interactions, eliminating the need for complex ultrasound transducers, signal processing equipment, and gel application procedures. This reduces device complexity while maintaining measurement precision and improving portability.
3Reliability
If environmental interference is filtered out, then measurement reliability improves, but loss of information increases due to potential signal attenuation
Solution Approach 1:
The electromagnetic field-based system inherently rejects environmental interference that affects acoustic and mechanical sensing methods. The field generator creates an electromagnetic field that penetrates the chest tissue, and the field detector measures changes in the field caused by compression. This method is not affected by ambient noise, temperature variations, or other environmental factors that interfere with ultrasound and accelerometer measurements, maintaining signal integrity without requiring aggressive filtering.
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
The device provides accurate and reliable measurements of CPR parameters, improving the quality of chest compressions and reducing the risk of errors, while being more portable and cost-effective than existing technologies.
Implementation Method 1
a field generator adapted to generate a field; a field detector adapted to detect the field generated by the field generator
Data Source
AI summary
A device for the determination of at least one compression parameter during administration of cardiopulmonary resuscitation (CPR) on a patient comprising: a field generator, a field detector, and a processor. Position information and the compression parameter are determined from the field detected by the field detector. One of the field generator and the field detector is a position sensor and the other is a reference sensor.