Cuffless Bio-information Measuring Apparatus Using Optical Pulse Wave Envelopes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current cuff-based and cuffless blood pressure measurement methods face limitations in accuracy and convenience, particularly in non-invasive, continuous monitoring without the need for physical contact or calibration.
Innovation Solution
A bio-information measuring apparatus and method that combines pulse wave measurement and contact pressure analysis using multi-wavelength light emitters and receivers, with a processor that generates envelopes from these signals to extract features and calculate bio-information such as blood pressure, vascular age, and arteriosclerosis, employing linear function equations and dynamic coefficient calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cuff-based blood pressure measurement method is used, then measurement accuracy is improved, but device complexity and user convenience deteriorate due to physical contact requirement and calibration need
Solution Approach 1:
The patent replaces the mechanical cuff-based measurement system with an optical measurement system using light emitters and light receivers to detect pulse waves. This substitution eliminates the need for physical contact and manual calibration while maintaining measurement capability through non-contact optical detection of arterial pulse characteristics
Solution Approach 2:
The patent introduces an intermediary processing system that includes envelope generation and feature extraction modules. These intermediate processing steps transform raw optical signals into meaningful blood pressure parameters by analyzing pulse wave characteristics, thereby simplifying the overall measurement process without requiring direct mechanical contact
2Ease of operation
If cuffless blood pressure measurement method is used, then ease of operation is improved, but measurement precision deteriorates due to lack of physical contact and calibration
Solution Approach 1:
The patent replaces mechanical contact-based measurement with optical non-contact measurement. Light emitters illuminate the measurement target and light receivers detect reflected light to capture pulse wave signals, eliminating the need for cuff application and manual calibration while maintaining operational simplicity
Solution Approach 2:
The patent implements feedback mechanisms through continuous envelope generation and feature extraction from pulse wave signals. The system processes optical signals in real-time to provide ongoing blood pressure monitoring without requiring repeated manual calibration, thereby maintaining precision through continuous non-contact measurement
3Productivity
If continuous monitoring is implemented, then productivity is improved, but device complexity increases due to continuous signal processing requirements
Solution Approach 1:
The patent enables continuous blood pressure monitoring by continuously capturing pulse wave signals through optical detection and continuously processing them through envelope generation and feature extraction. This continuous action allows uninterrupted monitoring without requiring periodic interruptions for calibration or manual intervention
Solution Approach 2:
The patent implements self-service through automated signal processing that continuously monitors and processes optical signals without requiring external intervention. The system automatically generates envelopes, extracts features, and calculates blood pressure parameters in real-time, thereby achieving continuous monitoring while managing processing complexity through autonomous operation
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 accurate, cuffless, and continuous blood pressure monitoring with enhanced user guidance and calibration, providing comprehensive bio-information including blood pressure, vascular health, and fatigue levels without physical contact or extensive calibration.
Implementation Method 1
a plurality of light emitters configured to emit a light onto the object; and one or more light receivers configured to receive the light reflected from the object
Implementation Method 2
The contact pressure measurer may include at least one of an area sensor, a force sensor, a pressure sensor, and a strain gauge
Data Source
AI summary
A bio-information measuring apparatus includes: a pulse wave measurer configured to measure a plurality of pulse wave signals from an object; a contact pressure measurer configured to measure contact a pressure between the object and the pulse wave measurer; and a processor configured to obtain a plurality of first envelopes based on the contact pressure and the plurality of pulse wave signals, obtain a second envelope by combining the plurality of first envelopes, and measure bio-information based on the second envelope.