Wearable ECG Device with Wireless Band Sensor for Simultaneous Lead Acquisition
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Solution Overview
Problem
Conventional electrocardiograph devices, especially those mounted on smart watches, can only measure one electrocardiogram signal between both hands, providing insufficient medical information, and require sequential measurement of two limb leads, which is inconvenient and may lead to inaccurate arrhythmia determination due to potential desynchronization.
Innovation Solution
A wearable device with an electrocardiograph disposed in a watch band that wirelessly communicates with an electrocardiograph on the watch to measure two limb leads simultaneously, using a first electrocardiograph on the band to contact the wrist and a second on the watch to contact the opposite hand or leg, compensating for time delays in wireless communication to ensure simultaneous sampling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a smart watch electrocardiograph measures only one ECG signal between both hands, then the device structure is simple and portable, but the medical information provided is insufficient
Solution Approach 1:
The device is divided into two separate electrocardiograph units: a first electrocardiograph in the watch band and a second electrocardiograph in the watch body. This segmentation allows each unit to perform specific measurement functions (lead I and lead II/III respectively) while maintaining overall system portability and simplicity.
Solution Approach 2:
The watch system serves multiple functions: it acts as both a wearable timer/display device and a multi-lead electrocardiograph. The integration of the first electrocardiograph in the band and the second in the watch body enables the device to provide comprehensive cardiac monitoring capabilities beyond single-lead measurement.
2Measurement precision
If two limb leads are measured sequentially, then the measurement process is simple to implement, but the measurement accuracy deteriorates due to potential desynchronization
Solution Approach 1:
The system performs preliminary synchronization by having the first electrocardiograph in the band measure lead I and wirelessly transmit the data to the second electrocardiograph in the watch body before the final analysis is completed. This preliminary measurement and transmission ensure that both lead I and lead II/III data are captured simultaneously and are ready for accurate arrhythmia determination.
Solution Approach 2:
The second electrocardiograph in the watch body receives and processes the measured lead I data from the first electrocardiograph, providing feedback that enables the system to calculate additional leads (aVR, aVL, aVF) and perform comprehensive cardiac analysis with improved accuracy.
3Measurement precision
If a first electrocardiograph in the band wirelessly transmits measured lead I data to a second electrocardiograph in the watch, then simultaneous two-limb-lead measurement is achieved, but time delay compensation is required
Solution Approach 1:
The first electrocardiograph in the band performs preliminary measurement of lead I and immediately transmits the data wirelessly to the second electrocardiograph in the watch body. This preliminary action ensures that the measurement is captured at the exact moment it occurs, and the time delay is minimized and compensated for in the data processing stage.
Solution Approach 2:
The system replaces physical wired connections with wireless communication between the first electrocardiograph in the band and the second electrocardiograph in the watch. This substitution eliminates the need for physical cable connections while enabling simultaneous measurement, though it introduces time delay that requires software-based compensation.
Data Source
AI summary
The present invention relates to a wearable device for acquiring plural electrocardiogram lead signals, and more particularly, to a wearable device as a plurality of electrocardiogram measuring devices (measurement sensors) wearable by an individual, which is convenient to carry so as to be easily used regardless of time and place, and configured to acquire six electrocardiogram lead signals through two limb lead signals measured simultaneously.