Contactless Baroreceptor Reflex Monitoring via Facial Video Analysis
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Solution Overview
Problem
Current methods for monitoring the baroreceptor reflex, which is crucial for diagnosing orthostatic intolerance and assessing blood pressure regulation, are invasive, inconvenient, and often unreliable, especially for routine monitoring in natural settings like standing up from a supine position.
Innovation Solution
A non-invasive and contactless monitoring system using sensors attached to or near a bed to track changes in heart rate and posture, processing signals from strain sensors, cameras, or Doppler radar to provide an indication of the baroreceptor reflex without requiring direct contact with the user's body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If orthostatic stress tests (HUT, standing up) are used to monitor baroreceptor reflex, then blood pressure and heart rate can be continuously monitored, but the tests require visits to medical facilities, are not standardized, and results are often not repeatable
Solution Approach 1:
The patent replaces complex mechanical orthostatic stress testing equipment (tilt tables, blood pressure cuffs) with optical sensing technology. A camera captures video of the user's face, and photoplethysmography (PPG) algorithms extract heart rate and baroreceptor reflex information from subtle color changes in the facial skin, eliminating the need for medical facility visits and complex mechanical devices.
Solution Approach 2:
The patent creates a virtual copy of the physiological measurement process by using video imaging to capture facial blood volume changes. Instead of directly measuring blood pressure with mechanical cuffs, the system captures optical reflections from the skin that indirectly represent the same physiological information, providing a non-invasive alternative that can be performed anywhere.
2Ease of operation
If blood pressure cuff and heart rate monitor are used for self-testing, then measurements can be taken at home, but the process is inconvenient and time consuming, and precise measurements cannot be expected
Solution Approach 1:
The patent replaces mechanical blood pressure cuffs and contact-based heart rate monitors with contactless optical sensing. A standard camera captures facial video, and automated image processing extracts heart rate and baroreceptor reflex data without requiring the user to manually position any devices or inflate cuffs, achieving both convenience and precision simultaneously.
3Ease of operation
If contactless optical sensing is used to monitor baroreceptor reflex, then non-invasive and convenient monitoring is achieved, but the system must accurately detect subtle physiological changes without direct contact
Solution Approach 1:
The patent creates an optical copy of the physiological signal by capturing facial blood volume pulse waves through video imaging. The subtle color changes in the skin caused by each heartbeat are amplified and processed through PPG algorithms, transforming invisible physiological changes into measurable data without requiring physical contact with the patient.
Solution Approach 2:
The patent transitions from direct mechanical measurement to indirect optical measurement by moving to a different dimension of detection. Instead of measuring pressure or electrical signals directly from the body, the system captures optical reflections from the facial surface, converting three-dimensional physiological processes into two-dimensional image data that can be analyzed computationally.
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 continuous, unobtrusive monitoring of the baroreceptor reflex, reducing the risk of falls and faints by providing accurate and repeatable data on heart rate changes during posture transitions, facilitating timely medical intervention and assessment of treatment effects.
Implementation Method 1
processing signal from a sensor that is attached to or located proximate to a bed to determine when the user moves from a lying position on the bed to a sitting position
Implementation Method 2
processing signal from a sensor that is attached to or located proximate to a bed to determine when the user moves from a lying position on the bed to a sitting position, and to provide an indication of the baroreceptor reflex of the user by determining the change in the heart rate of the user
Data Source
AI summary
There is provided an apparatus for use in monitoring the baroreceptor reflex in a user, the apparatus comprising a processor configured to process a signal output by a first sensor that is attached to or located proximate to a bed to determine when the user moves from a lying position on the bed to a sitting position, and to provide an indication of the baroreceptor reflex of the user by processing the signal to determine the change in the heart rate of the user that occurs as a result of moving from the lying position to the sitting position.