Smart Insole SpO2 Monitoring and Stimulation for Diabetic Wounds
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Solution Overview
Problem
Diabetic individuals face challenges in wound healing due to sub-optimal oxygenation, which can lead to chronic foot ulcers and complications, as existing technologies lack effective monitoring and treatment solutions for early intervention and home-based management.
Innovation Solution
A smart shoe insole equipped with photoplethysmography (PPG) sensors to monitor blood oxygen saturation (SpO2) levels and flexible electrodes that provide electrical stimulation and heating to enhance blood flow and wound healing, allowing for early detection and treatment of diabetic foot ulcers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If photoplethysmography sensors and electrodes are integrated into the insole to monitor and treat diabetic foot ulcers, then wound healing effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functional components (PPG sensors for SpO2 monitoring, flexible electrodes for electrical stimulation, heating elements for thermal therapy, and wireless communication modules) into a single integrated insole device. This merging approach enables comprehensive wound monitoring and treatment delivery while maintaining patient comfort and mobility, resolving the contradiction between improved wound healing effectiveness and increased device complexity by consolidating functions into one wearable unit.
Solution Approach 2:
The insole is designed as a multi-functional device that simultaneously performs wound monitoring (via PPG sensors measuring SpO2 and perfusion index), electrical stimulation therapy, thermal therapy, and wireless data transmission. This universal design allows a single device to address multiple aspects of diabetic foot ulcer management, improving overall treatment effectiveness while avoiding the need for multiple separate devices.
2Measurement precision
If continuous monitoring of SpO2 levels is implemented to enable early intervention, then detection precision is improved, but energy consumption increases
Solution Approach 1:
The system implements periodic measurement cycles where the PPG sensors continuously monitor SpO2 levels at regular intervals rather than operating at maximum capacity continuously. The microcontroller processes data in periodic batches and triggers wireless transmission only when clinically relevant changes are detected or at scheduled intervals, enabling precise monitoring while significantly reducing power consumption compared to continuous high-rate sampling and transmission.
Solution Approach 2:
The system incorporates feedback mechanisms where the microcontroller continuously evaluates PPG sensor data and adjusts monitoring intensity based on detected conditions. When SpO2 levels are stable and within normal ranges, monitoring operates at lower intensity to conserve energy. When abnormalities are detected (such as declining SpO2 levels indicating worsening wound condition), the system increases monitoring frequency and triggers alerts, optimizing the balance between detection precision and energy consumption through adaptive feedback control.
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
The smart insole effectively monitors SpO2 levels and perfusion index, providing timely intervention through electrical stimulation and heating to improve wound healing, potentially reducing the risk of complications such as amputation.
Implementation Method 1
A smart shoe insole equipped with photoplethysmography (PPG) sensors to monitor blood oxygen saturation (SpO2) levels
Implementation Method 2
flexible electrodes that provide electrical stimulation and heating to enhance blood flow and wound healing
Implementation Method 3
electrical stimulation and heating to enhance blood flow and wound healing
Data Source
AI summary
A shoe insole includes photoplethysmography (PPG) sensors to monitor SpO2 levels to aid in detection of one or more disorders such as hypoxemia, deteriorating organ function, wound prone tissues or the like. The insole further includes electrodes that may be utilized to stimulate a foot at or adjacent a wound. An insole according to the present disclosure may be utilized to monitor diabetic wounds, and aid in the healing of diabetic wounds of a foot.