RF and Light Pulse Wave Velocity Monitoring
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Solution Overview
Problem
Current methods for monitoring cardiovascular health, such as blood pressure measurements, are limited by the need for manual processes that restrict the frequency and accuracy of data collection, often providing an incomplete view of a patient's condition due to environmental discrepancies between measurement locations and daily conditions.
Innovation Solution
A medical monitoring system that uses RF and light waves to remotely monitor cardiovascular health by transmitting and receiving signals from an aortic region and arteries, determining pulse wave velocity and blood pressure through fiducial points and time difference parameters, allowing for continuous, non-invasive, and more frequent measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual cardiovascular measurement methods are used, then measurement accuracy can be maintained under controlled conditions, but measurement frequency and completeness of cardiovascular health data are limited
Solution Approach 1:
The patent replaces manual mechanical measurement processes with an automated optical system. The photodetector detects light absorption changes in the artery, and the processor automatically calculates pulse wave velocity and cardiovascular parameters, eliminating the need for manual operation while enabling continuous monitoring.
Solution Approach 2:
The system performs self-measurement by automatically detecting arterial pulse waves through light absorption changes and computing cardiovascular parameters without requiring caregiver intervention. The device autonomously monitors the patient's cardiovascular health continuously, generating complete health data profiles.
2Measurement precision
If multiple measurement locations are used to improve representativeness, then environmental discrepancies can be reduced, but measurement complexity and time requirements increase
Solution Approach 1:
The system enables continuous monitoring of cardiovascular parameters by maintaining constant light illumination on the artery and continuously detecting pulse wave signals. This allows representativeness to be improved through sustained measurement without requiring multiple discrete measurement sessions, eliminating time loss while ensuring comprehensive data collection.
3Loss of information
If traditional manual measurement equipment is used, then device simplicity is maintained, but the ability to provide continuous monitoring and comprehensive cardiovascular assessment is limited
Solution Approach 1:
The patent creates a multi-functional system where a single device performs multiple cardiovascular assessment functions: detecting pulse wave velocity, calculating blood pressure, monitoring heart rate, and assessing arterial stiffness. The photodetector-based optical system serves multiple diagnostic purposes simultaneously, reducing information loss without proportionally increasing device complexity.
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
Enables real-time or near-real-time monitoring of cardiovascular health, providing a more comprehensive view of a patient's condition with increased frequency and accuracy compared to traditional methods, facilitating timely responses to changes in cardiovascular health.
Implementation Method 1
an RF receiver and associated RF circuitry configured to receive RF waves reflected from the aortic region of the patient
Implementation Method 2
a light sensor and associated light sensor circuitry configured to receive light reflected from the one or more arteries below the skin
Data Source
AI summary
Medical monitoring systems and techniques for remote monitoring of RF-based and light-based physiological information of a patient are provided. A system as disclosed herein includes an RF transmitter configured to be placed on a predetermined location of the patient and an RF receiver and associated circuitry configured to provide RF sensor signals including information about an RF-based aortic region waveform. The system includes at least one light source configured to be placed on the predetermined location and a light sensor and associated light sensor circuitry configured to provide light sensor signals including information about a light-based arterial waveform. The system includes a processor configured to determine a first fiducial point on the RF-based aortic region waveform, determine a second fiducial point on the light-based arterial waveform, determine a time difference parameter between the fiducial points, and determine at least a pulse wave velocity.