Non-Invasive Glucose Monitoring Technologies
Summary
Non-invasive glucose monitoring encompasses techniques that estimate blood glucose levels without breaching the skin’s barrier, thereby reducing patient discomfort and risk of infection. Current research explores optical approaches—such as near-infrared, mid-infrared and Raman spectroscopy—as well as photoacoustic detection, holographic and hydrogel-based colourimetric sensors, electromagnetic-wave probing and transdermal sampling. These modalities typically target glucose in interstitial fluid or identify specific vibrational or absorption features of glucose molecules. Advances in wearable platforms, micro-optical components and signal-processing algorithms have enabled more stable readings, continuous tracking and integration with mobile devices. Computational methods, including multivariate regression and machine learning, compensate for physiological variability, skin heterogeneity and environmental interference. The global rise in diabetes and demand for painless, point-of-care monitoring underpins the urgent drive towards accurate, robust and affordable non-invasive systems capable of clinical-grade performance.
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Non-Invasive Glucose Monitoring Technologies publication trend
The graph below shows the total number of articles in non-invasive glucose monitoring technologies across all publications each year (not limited to Nature Index journals).
Technical terms
Interstitial fluid: The extracellular fluid surrounding tissue cells, reflecting blood glucose with a slight time lag.
Photoacoustic spectroscopy: A technique where pulsed or modulated light induces ultrasonic waves in tissue, detected to infer molecular absorption.
Raman spectroscopy: A vibrational spectroscopic method that measures inelastic scattering of light to identify molecular fingerprints.
Hydrogel sensor: A water-swollen polymer network that changes its optical properties in response to glucose binding, often via boronic acid moieties.
Continuous glucose monitoring (CGM): A system that provides near-real-time glucose measurements at frequent intervals, typically through subcutaneous or non-invasive sensing.
References
- Reusable Dual‐Photopolymerized Holographic Glucose Sensors. Advanced Functional Materials (2023).
- Noninvasive Electromagnetic Wave Sensing of Glucose. Sensors (2019).
- A Review of Non-Invasive Optical Systems for Continuous Blood Glucose Monitoring. Sensors (2021).
- Differential Continuous Wave Photoacoustic Spectroscopy for Non-Invasive Glucose Monitoring. IEEE Sensors Journal (2019).
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