Pulse Arrhythmia Detection via Statistical Cuff Analysis
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Solution Overview
Problem
Current methods for detecting cardiac arrhythmias, such as atrial fibrillation and premature contractions, are inadequate as they often go unnoticed until symptoms appear, posing a latent health danger, and existing technologies like pulse oximetry and electrocardiograms are not practical for immediate detection during blood pressure measurements.
Innovation Solution
A detection apparatus that analyzes pulse sequences from a cuff to determine pulse period and amplitude differences, using statistical analysis to identify atrial fibrillation and premature contractions by comparing the similarity of sequential pulse periods and amplitudes, providing clear and immediate diagnostic information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pulse oximetry or electrocardiogram methods are used to detect cardiac arrhythmias, then detection capability is provided, but the methods are not practical for immediate detection during blood pressure measurements and require separate procedures
Solution Approach 1:
The patent combines arrhythmia detection functionality with the existing blood pressure measurement procedure by analyzing pulse sequences obtained during the blood pressure measurement process itself, eliminating the need for separate detection procedures and enabling immediate detection during routine blood pressure monitoring
Solution Approach 2:
The blood pressure measurement apparatus is enhanced to perform multiple functions: it simultaneously measures blood pressure and detects cardiac arrhythmias by analyzing the pulse sequence data already acquired during the blood pressure measurement, making the device versatile without requiring additional specialized equipment
2Reliability
If cardiac arrhythmias are monitored continuously, then early detection of atrial fibrillation and premature contractions is improved, but the complexity of the detection system increases
Solution Approach 1:
The system uses the pulse sequence data already obtained for blood pressure measurement to simultaneously detect arrhythmias, allowing the existing measurement process to serve dual purposes without requiring additional sensors or complex separate monitoring systems
Solution Approach 2:
The patent detects arrhythmias by analyzing changes in pulse period and amplitude parameters within the pulse sequence obtained during blood pressure measurement, using statistical analysis of these parameter variations to identify arrhythmic patterns without requiring complex additional instrumentation
3Measurement precision
If statistical analysis of pulse sequences is performed to identify arrhythmias, then detection accuracy is improved, but the processing time and computational requirements increase
Solution Approach 1:
The system performs statistical analysis on the pulse sequence data obtained during the blood pressure measurement period, using the already-acquired data to calculate pulse periods and amplitudes, thereby achieving accurate arrhythmia detection without requiring additional measurement time or excessive computational resources beyond what is already invested in the blood pressure measurement
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
This approach allows for accurate and timely detection of arrhythmias during blood pressure measurements, improving patient safety by providing immediate guidance on whether to accept the condition, make an appointment, or seek immediate medical attention.
Implementation Method 1
One of these technologies is the detection of pulses by the compression of a pre-pressured cuff which is wrapped around the limb and thus is responding to any circumferential pressure changes
Data Source
Figure 1A~1B
Figure 2
Figure 3~4
AI summary
An apparatus (1) and method for detecting pulse-related parameters, such as pulse arrhythmia is presented. The apparatus (1) detects a series of pulses from a user, e.g. through a cuff-related measurement. Time differences, amplitude and pattern differences between multitudes ofN pulses are determined. The apparatus investigates the degree of similarity of multiple pulse periods and / or pulse amplitudes and / or pulse pattern and subsequently generates a statistical set of similarity values based on a plurality of compared results. Basing on this, the apparatus generates a decision value based on the statistical sets of similarity values, and uses the decision value to determine whether or not the user discloses a normal pulse rhythm, atrial fibrillation, premature atrial or ventricular contractions, tachycardia, bradycardia and/or unspecified pulse arrhythmia. Further an artefact index is generated, informing the user whether a measurement was taken under sufficient artefact-free measurement conditions.