Wearable PPG Device with Cuff-Based Vascular Assessment
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Solution Overview
Problem
Existing wearable devices lack an effective method to assess vascular health, which is crucial for early detection of cardiovascular diseases.
Innovation Solution
The electronic device is equipped with a PPG sensor and a cuff that can inflate with fluid, allowing it to detect blood flow rate information and compression/tension timing. It calculates perfusion indices based on this data to identify vascular health information and notify the user of their vascular health state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wearable device uses only basic sensors (without cuff integration), then the device complexity is reduced, but the measurement precision for vascular health assessment deteriorates
Solution Approach 1:
The patent merges two separate devices (wearable device with PPG sensor and external device with cuff) into an integrated system. The wearable device detects blood flow rate information while the external device with cuff detects compression and relaxation timing, and both devices work together to calculate perfusion indices and assess vascular health, achieving high measurement precision through combined functionality.
2Ease of operation
If the wearable device integrates all functions including cuff inflation mechanism, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent segments the vascular health assessment system into two separate devices: a wearable device that monitors blood flow rate continuously, and an external device with cuff that performs periodic compression measurements. This segmentation allows each device to have specialized functionality, improving ease of operation for specific tasks while distributing complexity across multiple components rather than concentrating all functions in one device.
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
This solution enables the wearable device to provide accurate assessments of vascular health, facilitating early diagnosis and management of cardiovascular conditions.
Implementation Method 1
identifying blood flow rate information through the PPG sensor
Implementation Method 2
obtain compression timing information of the cuff and relaxation timing information of the cuff
Data Source
AI summary
An electronic device may comprise at least one processor, a photoplethysmography (PPG) sensor. The at least one processor may be configured to cause the electronic device to: detect an external electronic device including a cuff; identify blood flow information via the PPG sensor; obtain compression time information of the cuff and relaxation time information of the cuff; obtain first perfusion index information based on the blood flow information and the compression time information; obtain second perfusion index information based on the blood flow information, the compression time information, and the relaxation time information; identify vascular health information based on a ratio of the first perfusion index information and the second perfusion index information; and display a notification to inform the user of a vascular health condition on the basis of the vascular health information.