Cuffless Blood Pressure Initialization With Real-Time Signal Feedback
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Solution Overview
Problem
Existing cuffless blood pressure monitors provide a poor user experience due to unreliable and non-reliable initialization processes, often requiring multiple attempts and providing delayed feedback on signal adequacy and reliability, especially in non-clinical settings.
Innovation Solution
A method for cuffless blood pressure monitoring that includes real-time feedback and iterative adjustment of measurement parameters, ensuring proper device placement and signal quality through interactive guidance and threshold-based checks for adequacy and reliability, using both local and remote processing to optimize user interaction and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional initialization processes are used for cuffless BP monitors, then the device can obtain calibration parameters, but the user experience deteriorates due to unreliable measurements and delayed feedback
Solution Approach 1:
The patent implements real-time feedback mechanisms that continuously monitor signal adequacy and reliability during the initialization process. The system provides immediate feedback to users about measurement quality, allowing them to adjust device placement or retry measurements before calibration is complete, thereby improving both reliability and ease of operation
Solution Approach 2:
The system performs preliminary assessments of signal adequacy and reliability before finalizing calibration parameters. By evaluating multiple quality metrics in advance and requiring threshold met before completing initialization, the system ensures reliable calibration while guiding users through the process with clear feedback about what conditions must be satisfied
2Measurement precision
If multiple initialization attempts are required to achieve reliable calibration, then measurement accuracy improves, but the time required for initialization increases
Solution Approach 1:
Real-time feedback on signal quality metrics allows the system to immediately identify inadequate measurements and prompt users to correct placement or retry, rather than requiring multiple sequential attempts. This reduces total initialization time while maintaining calibration accuracy through guided iterative improvement
Solution Approach 2:
The system evaluates multiple quality metrics simultaneously and requires thresholds to be met before completing calibration. By performing comprehensive checks in parallel rather than sequential attempts, the system achieves accurate calibration more efficiently by not requiring full re-initialization after each failed attempt
Data Source
AI summary
A method for monitoring blood pressure (BP) of a user using a cuffless monitoring system comprising a pulsatility waveform measuring device configured to measure a pulsatility waveform signal of the user, the method comprising an initialization routine (10) including performing an adequacy routine (20) for adjusting the measurement parameters of the pulsatility waveform measuring device (103); and performing a reliability test for determining a reliability of the measurement. The method provides incremental feedback of the adequacy of the acquired signals, the reliability of pulsatility waveforms, and the repeatability of the absolute BP values.