Dynamic Physiological Trace Width for Signal Uncertainty
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Solution Overview
Problem
Current physiological monitoring systems face challenges in effectively displaying physiological information, particularly in conveying uncertainty and signal quality, which are crucial for accurate interpretation of measured data.
Innovation Solution
The system processes physiological signals to determine metrics associated with uncertainty and other parameters, varying display characteristics such as width, color, and translucency of the trace to dynamically represent both the physiological parameter and its uncertainty, allowing for real-time or historical graphical representations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a traditional fixed-width trace is displayed, then the display is simple and easy to interpret, but it cannot convey uncertainty and signal quality information
Solution Approach 1:
The patent applies dynamics by making the trace width variable rather than fixed. The trace width dynamically adjusts based on signal quality metrics, allowing the display to adapt to different measurement conditions. This resolves the contradiction by introducing variability to convey uncertainty information without requiring a completely complex display system.
Solution Approach 2:
The patent changes the parameter of trace width based on signal quality metrics. By modulating the width parameter in response to measured uncertainty, the system encodes quality information directly into the visual representation. This parameter change approach allows simple visual encoding of complex information about signal reliability.
2Loss of information
If multiple display parameters are varied to show uncertainty, then information communication is improved, but the display becomes more complex
Solution Approach 1:
The patent applies local quality by varying the trace width locally along the time series, with different segments of the trace having different widths corresponding to different signal quality levels at different times. This allows quality information to be encoded in a way that maintains overall display simplicity while providing localized detail where needed.
Data Source
AI summary
Methods and systems are presented for displaying physiological information with a physiological monitor. A physiological parameter, for example oxygen saturation, is computed from a received physiological signal, for example a PPG signal. At least one metric associated with the received physiological signal is determined, for example a statistical measure of uncertainty associated with the determined physiological parameter. Display parameters are determined, for example a width parameter, based on the metrics and a trace of the computed physiological parameter for a subject is displayed. In some embodiments, the width of the displayed trace may be varied based on the width parameter. In some embodiments, additional or alternative characteristics of the displayed trace may be varied based on respective display parameters. The variations in characteristics of the displayed trace may provide dynamic graphical representations of, for example, the uncertainty associated with determined values of the physiological parameter.