Noninvasive Glucose Estimation via Mobile LED Flash Spectroscopy
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Solution Overview
Problem
Current methods for monitoring blood glucose and glycated hemoglobin in diabetes management are invasive, requiring frequent skin punctures and are not suitable for continuous, non-invasive, and accurate measurement.
Innovation Solution
A non-invasive light-based method using a mobile device with an objective lens and LED flash to capture and analyze light transmittance, absorption, and scattering data from soft tissue, employing mathematical analysis to estimate glucose and glycated hemoglobin levels through power spectral density processing and genetic algorithms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional skin puncture methods are used for blood glucose monitoring, then measurement accuracy is improved, but patient comfort and ease of operation deteriorate due to frequent invasive procedures
Solution Approach 1:
The patent replaces the mechanical skin puncture system with an optical system using near-infrared spectroscopy. Instead of physically breaking the skin to obtain blood samples, the invention uses light interaction with tissue to measure glucose levels, thereby eliminating the invasive mechanical aspect while maintaining measurement capability
Solution Approach 2:
The patent introduces light as an intermediary substance to transfer information about glucose concentration from the tissue to the detector. The near-infrared light acts as a mediator that interacts with glucose molecules in the tissue without requiring direct blood contact or skin penetration, enabling non-invasive measurement
2Measurement precision
If traditional skin puncture methods are used for blood glucose monitoring, then measurement accuracy is improved, but device complexity and frequency of use increase due to need for frequent repeated procedures
Solution Approach 1:
The patent enables continuous monitoring by maintaining constant or repeated optical measurements without interruption. The system continuously directs near-infrared light through the tissue and collects spectral data over time, providing ongoing glucose level information rather than discrete intermittent measurements requiring repeated patient actions
Solution Approach 2:
The patent replaces the complex mechanical puncture system with a simpler optical measurement system that uses light sources, detectors, and spectral analysis algorithms, reducing the mechanical complexity involved in each measurement cycle
3Measurement precision
If narrow band infrared light sources are used to detect specific blood constituents, then measurement precision for specific constituents is improved, but device complexity increases due to specialized light sources and detectors
Solution Approach 1:
The patent employs a near-infrared light source that can simultaneously detect multiple blood constituents including glucose, glycated hemoglobin, and other analytes. The broad near-infrared spectrum serves multiple detection functions, eliminating the need for separate specialized light sources for each constituent while maintaining precise measurement capability
Solution Approach 2:
The patent utilizes the natural variation in absorption spectra of different blood constituents across the near-infrared wavelength range. By analyzing spectral patterns at multiple wavelengths within the near-infrared band, the system distinguishes between different constituents based on their unique optical signatures without requiring highly specialized narrow-band sources
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, non-invasive monitoring of blood glucose and glycated hemoglobin levels without skin punctures, providing stable and accurate data for diabetes management, allowing for real-time feedback and personalized treatment recommendations.
Implementation Method 1
capture and analyze light transmittance, absorption, and scattering data from soft tissue
Implementation Method 2
analyze light transmittance, absorption, and scattering data from soft tissue
Implementation Method 3
analyze light transmittance, absorption, and scattering data from soft tissue
Data Source
AI summary
A light-based method and technique for measuring the static and average plasma glucose concentration over a prolonged period of time. More specifically, the disclosure relates to a method that utilizes mathematical analysis of appendage mobile LED flash IR light transmittance, absorption and scattering by using high resolution mobile camera data to estimate the concentration of glucose and glycated hemoglobin (HbA1c) in millimoles per liter (mmol/L).