Annular Biosensor Height Detection for Blood Pressure Accuracy
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Solution Overview
Problem
Existing blood pressure measurement technologies are invasive, non-portable, and prone to inaccuracies due to variations in hydrostatic pressure caused by the height difference between the measurement site and the heart, and they often require cuffs, which are cumbersome and difficult to use accurately.
Innovation Solution
A biological data measurement system comprising an annular biosensor worn on the finger or wrist and a mobile control unit that captures images of the user's face and hand to determine if the biosensor is at the height of the chest, allowing for accurate, non-invasive, and portable blood pressure measurement without the need for a cuff.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a cuff is used to measure blood pressure, then measurement accuracy is improved, but device size and portability deteriorate
Solution Approach 1:
The invention extracts the essential measurement function from the traditional cuff-based system. By using only the sensor component without the cuff, the device achieves portability while maintaining measurement capability through alternative contact methods using the finger itself as the measurement site
Solution Approach 2:
The invention replaces the mechanical cuff inflation system with an optical sensor system. Instead of using mechanical pressure application through a cuff, the system uses light absorption measurements through the finger to detect blood pressure parameters, eliminating the need for complex mechanical components
2Ease of operation
If contact pressure is not kept constant, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The invention incorporates feedback mechanisms that monitor measurement conditions in real-time. The system detects variations in contact pressure and provides feedback to the user to adjust their holding technique, ensuring consistent measurement quality without requiring complex mechanical pressure control
Solution Approach 2:
The invention makes the user's finger serve multiple functions: it holds the device, provides the measurement site, and acts as the contact interface. This self-service approach eliminates the need for separate pressure control mechanisms while maintaining measurement accuracy through the natural ergonomics of finger holding
3Ease of operation
If measurement site height differs from heart height, then ease of operation is improved, but measurement precision deteriorates due to hydrostatic pressure
Solution Approach 1:
The invention performs preliminary detection of the measurement site position relative to the heart using image recognition technology. Before taking the measurement, the system analyzes the captured image to determine if the finger is at the appropriate height, and provides guidance to the user to adjust their posture or device position to ensure accurate measurements
Data Source
AI summary
A biological data measurement system is provided that includes an annular biosensor and a mobile control unit. The annular biosensor includes a body that has an annular shape and is configured to be worn on a finger and a sensor that measures, for example, a blood pressure. The mobile control unit includes an imager that captures images, and a display that prompts a user holding the mobile control unit in one hand to cause the imager to capture an image of a face of the user and another hand wearing the annular biosensor and displays the captured image. The mobile control unit also includes a controller that determines, based on the image, whether the other hand is at the height of a chest and controls the biological data measurement system based on the result of the determination to obtain data such as the blood pressure.