Wearable ECG Monitor With Integrated Actigraphy Sensor
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Solution Overview
Problem
Current ECG monitoring systems are limited by their inability to provide long-term, ambulatory, and cost-effective recording of cardiac electrical activity, often resulting in incomplete diagnosis due to electrode dislodgment, skin irritation, and the need for separate devices for ECG and actigraphy monitoring, which can lead to unsynchronized and misinterpreted data.
Innovation Solution
A wearable monitor with a flexible extended wear electrode patch and a removable reusable recorder that allows for central placement on the chest, incorporating an actigraphy sensor to synchronize ECG and movement data, enabling long-term recording of atrial signals and actigraphy events, and facilitating comfortable wear by minimizing skin irritation and allowing for easy electrode replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If ECG electrodes are worn for long-term extended monitoring, then diagnostic efficacy is improved, but electrode adhesion deteriorates and skin irritation occurs
Solution Approach 1:
The patent employs disposable adhesive patches that are designed for single-use, extended wear applications. These patches incorporate biocompatible, irritant-free adhesives that maintain reliable electrode-skin contact throughout the monitoring period, then are discarded after use. This approach eliminates cumulative skin irritation and adhesive degradation issues that plague reusable systems.
Solution Approach 2:
The patent modifies the chemical and physical parameters of the adhesive materials used in the electrodes. Specifically, it employs adhesives with adjusted composition and properties that are optimized for long-term skin contact without causing irritation. The adhesive parameters (such as tack, bonding strength, and biocompatibility) are specifically tuned to maintain reliable electrode attachment throughout extended monitoring periods.
2Measurement precision
If ECG electrodes are firmly fastened to maintain skin contact, then signal recording quality is improved, but patient comfort deteriorates and movement restriction increases
Solution Approach 1:
The patent utilizes flexible, thin-film substrate materials for the electrode patches that conform to the contours of the patient's body. These flexible substrates maintain electrode-skin contact through elastic deformation rather than rigid fastening, allowing patients to move freely while preserving signal quality. The thin-film construction reduces stiffness and improves comfort.
Solution Approach 2:
The patent adjusts the mechanical parameters of the electrode assembly, specifically the stiffness and elasticity of the substrate and adhesive layers. By optimizing these parameters, the electrode maintains sufficient contact pressure for high-quality signal recording while remaining flexible enough to accommodate patient movement and body contours, thereby preserving comfort.
3Measurement precision
If separate devices are used for ECG and actigraphy monitoring, then each function can be optimized, but device complexity and data synchronization difficulties increase
Solution Approach 1:
The patent integrates ECG recording functionality, actigraphy sensing, and synchronized data acquisition into a single unified wearable device. The ECG electrodes incorporate accelerometers and other sensors that simultaneously capture cardiac electrical activity and movement data. This merger eliminates the need for separate devices and ensures automatic temporal synchronization of all physiological parameters, while maintaining functional optimization through dedicated sensors for each measurement type.
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 solution enhances ECG monitoring performance and comfort by allowing continuous, high-quality recording of atrial signals and actigraphy events, improving arrhythmia diagnosis and patient care through synchronized data correlation, while maintaining patient comfort and reducing the need for frequent electrode repositioning.
Implementation Method 1
an actigraphy sensor electrically interfaced with the micro-controller and operable to sense one or more actigraphy event occurrences based on movement of the sensor
Implementation Method 2
An electrocardiogram (ECG) measures and records such electrical potentials to visually depict the electrical activity of the heart over time
Data Source
AI summary
Physiological monitoring can be provided through an actigraphy sensor imbedded into an electrocardiography monitor, which correlates movement and electrocardiographic data. Physiological monitoring can be provided through a wearable monitor that includes two components, a flexible extended wear electrode patch and a removable reusable monitor recorder. The wearable monitor sits centrally on the patient's chest along the sternum. The patient can place an electrode patch anywhere within the general region of the sternum. The occurrence of actigraphy events are monitored by the monitor recorder through an actigraphy sensor. Actigraphy becomes a recordable actigraphy event occurrence when the movement of the wearable monitor and, therefore, the patient, exceeds a certain criteria threshold of acceleration or deceleration as detected by the actigraphy sensor. Certain actigraphy event occurrences as recorded by the monitor recorder are considered to be actionable, that is, of sufficient importance to warrant flagging for further consideration to a following physician.