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Non-Invasive Blood Glucose Monitoring Technology: A Review
Open accessAbstract
In recent years, with the rise of global diabetes, a growing number of subjects are suffering from pain and infections caused by the invasive nature of mainstream commercial glucose meters. Non-invasive blood glucose monitoring technology has become an international research topic and a new method which could bring relief to a vast number of patients. This paper reviews the research progress and major challenges of non-invasive blood glucose detection technology in recent years, and divides it into three categories: optics, microwave and electrochemistry, based on the detection principle. The technology covers medical, materials, optics, electromagnetic wave, chemistry, biology, computational science and other related fields. The advantages and limitations of non-invasive and invasive technologies as well as electrochemistry and optics in non-invasives are compared horizontally in this paper. In addition, the current research achievements and limitations of non-invasive electrochemical glucose sensing systems in continuous monitoring, point-of-care and clinical settings are highlighted, so as to discuss the development tendency in future research. With the rapid development of wearable technology and transdermal biosensors, non-invasive blood glucose monitoring will become more efficient, affordable, robust, and more competitive on the market.
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![Figure 3 Near-infrared (NIR) and mid-infrared (MIR) spectroscopy methods. (A) Noninvasive and fast measurement of blood glucose in vivo by NIR spectroscopy. Adapted with permission [46]. Copyright 2017, Elsevier. (B) Rapid and non-destructive measurement of glucose in a skin tissue phantom by near-infrared spectroscopy. Adapted with permission [47]. Copyright 2018, Elsevier. (C) Mid-infrared photoacoustic detection of glucose in human skin: towards non-invasive diagnostics. Adapted with permission [35]. Copyright 2016, MDPI. (D) Vibrational sensing using infrared nanoantennas: toward the non-invasive quantitation of physiological levels of glucose and fructose. Adapted with permission [48]. Copyright 2019, American Chemical Society.](/paper-figures/4c6e3c1499124f90a575c4ca4c786b47/non-invasive-blood-glucose-monitoring-technology-a-review-figure-3.jpg)
![Figure 4 Optical polarimetry method: dual-wavelength polarimetric glucose sensing. Adapted with permission [67]. Copyright 2013, SPIE.](/paper-figures/edaded7a8a2a4b1ebcf041b9f1f2073f/non-invasive-blood-glucose-monitoring-technology-a-review-figure-4.jpg)
![Figure 5 Raman spectroscopy methods. (A) multicomponent analysis using a confocal Raman microscope. Adapted with permission [68]. Copyright 2018, Optical Society of America. (B) Glucose sensing using surface-enhanced Raman-mode constraining. Adapted with permission [69]. Copyright 2018, American Chemical Society.](/paper-figures/8dbcc5e8721c49d795b35198fb8e8074/non-invasive-blood-glucose-monitoring-technology-a-review-figure-5.jpg)
![Figure 6 Fluorescence methods. (A) Colorimetric and ratiometric fluorescence dual-mode sensing of glucose. Adapted with permission [75]. Copyright 2019, MDPI. (B) Carbon-dot-based ratiometric fluorescence glucose biosensor. Adapted with permission [73]. Copyright 2019, Elsevier. (C) Nanostructured biosensor for detecting glucose in tear by applying fluorescence resonance energy transfer quenching mechanism. Adapted with permission [76]. Copyright 2017, Elsevier. Optical coherence tomography (OCT) method: (D) Non-invasive monitoring of blood glucose concentration in diabetic patients with optical coherence tomography. Adapted with permission [77]. Copyright 2017, Laser Physics Letters.](/paper-figures/8a3cad9c639d4046864ab2a70297d023/non-invasive-blood-glucose-monitoring-technology-a-review-figure-6.jpg)
![Figure 7 Microwave methods. (A) High-sensitivity, quantified, linear and mediator-free resonator-based microwave biosensor for glucose detection. (a) Microwave-based glucose biosensor, (b) micro-fabricated biochip mounted printed circuit board (PCB), and (c) sensing mechanism of microwave biosensor. Adapted with permission [91]. Copyright 2020, MDPI. (B) Demonstration of microstrip sensor for the feasibility study of non-invasive blood-glucose sensing. Adapted with permission [92]. Copyright 2020, Springer.](/paper-figures/c2918bb3debd4bd0bc6e1d909242455f/non-invasive-blood-glucose-monitoring-technology-a-review-figure-7.jpg)

![Figure 9 Saliva-based and breath acetone glucose monitoring. (A) Non-invasive glucose monitoring using saliva nano-biosensor. Adapted with permission [108]. Copyright 2015, Elsevier. (B) Non-invasive measurement of blood glucose by breath analysis. Adapted with permission [129]. Copyright 2020, John Wiley and Sons.](/paper-figures/6f9a0adc9c564c31898493ceedf899c6/non-invasive-blood-glucose-monitoring-technology-a-review-figure-9.jpg)
![Figure 10 Tear-based glucose monitoring. (A) Paper-based colorimetric biosensor for tear glucose measurements. Adapted with permission [131]. Copyright 2017, Micromachines. (B) Tear glucose detection combining microfluidic thread based device, amperometric biosensor and microflow injection analysis. Adapted with permission [109]. Copyright 2017, Elsevier. (C) Soft, smart contact lenses with integrations of wireless circuits, glucose sensors, and displays. Adapted with permission [137]. Copyright 2018, Science advances.](/paper-figures/8b6771b3028641499f126913e217a3b1/non-invasive-blood-glucose-monitoring-technology-a-review-figure-10.jpg)
![Figure 11 Sweat-based glucose monitoring. (A) Wearable/disposable sweat-based glucose monitoring device with multistage transdermal drug delivery module. Adapted with permission [138]. Copyright 2017, Science advances. (B) Enokitake mushroom-like standing gold nanowires toward wearable noninvasive bimodal glucose and strain sensing. Adapted with permission [110]. Copyright 2019, American Chemical Society.](/paper-figures/ed6f03258e27498385ac1a42fa0e93e5/non-invasive-blood-glucose-monitoring-technology-a-review-figure-11.jpg)
![Figure 12 ISF-based glucose monitoring. (A) Skin-like biosensor system via electrochemical channels for noninvasive blood glucose monitoring. Adapted with permission [111]. Copyright 2017, Science advances. (B) Non-invasive, transdermal, path-selective and specific glucose monitoring via a graphene-based platform. Adapted with permission [142]. Copyright 2018, Nature Nanotechnology.](/paper-figures/647c5c848a7e4a91909cef94c4c856b3/non-invasive-blood-glucose-monitoring-technology-a-review-figure-12.jpg)
![Figure 13 Gelatin methacryloyl microneedle patches for minimally invasive extraction of skin interstitial fluid. (A) Preparation process of the GelMA MN patch. (B) Schematic diagram of the extraction process in a rat model. (C) The detected glucose concentration (blue dots) was fitted as a line (blue line), R2 = 0.981. (D) A picture of the GelMA MN patch containing an 11 × 11 array of MNs over a 1 cm × 1 cm area. (E) Detected glucose concentrations in ISF compared to blood glucose concentrations. * p < 0.05, NS means not significant. Adapted with permission [147]. Copyright 2020, Small.](/paper-figures/a838452177414787ab9b6589d8d26509/non-invasive-blood-glucose-monitoring-technology-a-review-figure-13.jpg)
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“Indeed, it is remarkable that glucose levels in biofluids, such as ISF (Figure 4B), sweat (Figure 4C), saliva, tears, and urine (Figure 4 D, E, F, respectively) are correlated with those in the blood 76.”
From Glucose biosensors in clinical practice: principles, limits and perspectives of currently used devices (2022) · cites this paper as [76]
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In the citing paper
“As stated above, over the years, enzymatic amperometric glucose sensors were the first and widespread glucose sensors available 76.”
From Glucose biosensors in clinical practice: principles, limits and perspectives of currently used devices (2022) · cites this paper as [76]
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“It is widely known that enzymatic sensors such as those based on glucose oxidase are more stable than other enzymes, easy to obtain, and cheap; on the other hand, it quickly loses its activity at pH<2 or pH>8 and can be irrevocably damaged at temperatures above 40 °C 76.”
From Glucose biosensors in clinical practice: principles, limits and perspectives of currently used devices (2022) · cites this paper as [76]
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Citations
Cites
Standards of Medical Care in Diabetes
Power, D. V. (2006) · Diabetes Care · doi:10.2337/diacare.29.02.06.dc05-1593 · Cited by 8,676
Standards of medical care in diabetes—2014
American Diabetes Association (2014) · Diabetes Care · doi:10.2337/dc14-s014 · Cited by 4,572
Gabriel, S., Lau, R. W., & Gabriel, C. (1996) · Physics in Medicine and Biology · doi:10.1088/0031-9155/41/11/003 · Cited by 4,175
ELECTRODE SYSTEMS FOR CONTINUOUS MONITORING IN CARDIOVASCULAR SURGERY
Clark, L. C., & Lyons, C. (1962) · Annals of the New York Academy of Sciences · doi:10.1111/j.1749-6632.1962.tb13623.x · Cited by 3,945
Electrochemical Glucose Biosensors
Wang, J. (2008) · Chemical Reviews · doi:10.1021/cr068123a · Cited by 3,498
Standards of medical care in diabetes 2010
American Diabetes Association (2010) · Diabetes Care · doi:10.2337/dc10-s011 · Cited by 3,470
Nathan, D. M., & for the DCCT/EDIC Research Group (2014) · Diabetes Care · doi:10.2337/dc13-2112 · Cited by 1,832
Wearable and flexible electronics for continuous molecular monitoring
Yang, Y., & Gao, W. (2019) · Chemical Society Reviews · doi:10.1039/c7cs00730b · Cited by 1,315
Flexible Electronics toward Wearable Sensing
Gao, W. F., Ota, H., Kiriya, D., Takei, K., & Javey, A. (2019) · Accounts of Chemical Research · doi:10.1021/acs.accounts.8b00500 · Cited by 1,301
Microneedles: A smart approach and increasing potential for transdermal drug delivery system
Waghule, T., Singhvi, G., Dubey, S. K., Pandey, M. M., Gupta, G., Singh, M., & Dua, K. (2018) · Biomedicine & Pharmacotherapy · doi:10.1016/j.biopha.2018.10.078 · Cited by 1,277
Cited by
Sorted by citations
Flexible Wearable Sensors for Cardiovascular Health Monitoring
Chen, S., Qi, J., Fan, S., Qiao, Z., Yeo, J. C., & Lim, C. T. (2021) · Advanced Healthcare Materials · doi:10.1002/adhm.202100116 · Cited by 453
Pullano, S. A., Greco, M., Bianco, M. G., Foti, D., Brunetti, A., & Fiorillo, A. S. (2022) · Theranostics · doi:10.7150/thno.64035 · Cited by 210
“Indeed, it is remarkable that glucose levels in biofluids, such as ISF (Figure 4B), sweat (Figure 4C), saliva, tears, and urine (Figure 4 D, E, F, respectively) are correlated with those in the blood [76].”
BackgroundMethodInfluentialWu, Z., Qiao, Z., Chen, S., Fan, S., Liu, Y., Qi, J., & Lim, C. T. (2024) · Communications Materials · doi:10.1038/s43246-024-00468-6 · Cited by 204
Magnesium Oxide (MgO) Nanoparticles: Synthetic Strategies and Biomedical Applications
Gatou, Μ.-A., Skylla, E., Dourou, P., Pippa, Ν., Gazouli, M., Lаgopati, N., & Pavlatou, E. A. (2024) · Crystals · doi:10.3390/cryst14030215 · Cited by 176
Thwala, L. N., Ndlovu, S. C., Mpofu, K. T., Lugongolo, M. Y., & Mthunzi-Kufa, P. T. (2023) · Nanomaterials · doi:10.3390/nano13071247 · Cited by 171
Metadata
- Authors
- Tang, L., Chang, S. J., Chen, C.-J., & Liu, J.-T.
- Affiliations
- Research Center for Materials Science and Opti-Electronic Technology, College of Materials Science and Opti-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- I-Shou University (TW)
- University of Chinese Academy of Sciences (CN)
- Corresponding author
- Chen, Ching-Jung
- Liu, Jen-Tsai
- Venue
- Sensors
- Publisher
- MDPI AG
- Published
- 2020-12-04
- Volume
- 20
- Issue
- 23
- Pages
- 6925
- ISSN
- 1424-8220 (ISSN-L)
- PMC
- PMC7731259
- OpenAlex
- W3106856419
- Cited by
- 481
- References
- 149
- Citations by year
- 2026: 66 · 2025: 100 · 2024: 101 · 2023: 111 · 2022: 71 · 2021: 32
- FWCI
- 2.65
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Sensors (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Chinese Academy of Sciences
- University of Chinese Academy of Sciences
- Topics
- Physical Sciences › Chemistry › Analytical Chemistry › Electrochemical sensors and biosensors
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Spectroscopy Techniques in Biomedical and Chemical Research
- Physical Sciences › Engineering › Biomedical Engineering › Non-Invasive Vital Sign Monitoring
- Keywords
- non-invasive glucose monitoring, diabetes mellitus, optical glucose sensing, electrochemical glucose sensor, continuous glucose monitoring, point-of-care testing, wearable sensors
- MeSH terms
- Wearable Electronic Devices, Blood Glucose, Humans, Monitoring, Physiologic, Blood Glucose Self-Monitoring, Biosensing Techniques
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