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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

479
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
479
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

494
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
494

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Updated: Aug 8, 2025

Non-contact, Label-free Monitoring of Cells and Extracellular Matrix using Raman Spectroscopy
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Accurate Post-Calibration Predictions for Noninvasive Glucose Measurements in People Using Confocal Raman

Anders Pors1, Kaspar G Rasmussen1, Rune Inglev1

  • 1RSP Systems, Sivlandvænget 27C, 5260 Odense, Denmark.

ACS Sensors
|March 6, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a portable, non-invasive glucose monitor for diabetes care. The device offers stable, accurate readings for over 15 days, improving diabetes management and risk identification.

Keywords:
calibration stabilitydiabetesin vivo Raman spectroscopymultivariate data analysisnon-invasive glucose monitoringportable sensortissue diagnostics

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Diabetes Technology

Background:

  • Invasive glucose monitoring hinders diabetes prevention and care.
  • Current non-invasive technologies lack calibration stability for practical, long-term use.

Purpose of the Study:

  • To demonstrate the first practical, long-term use of a non-invasive glucose monitoring device.
  • To address the challenge of calibration stability in non-invasive glucose monitoring.

Main Methods:

  • A Raman-based, portable non-invasive glucose monitoring device was developed.
  • A home-based clinical study involved 160 subjects with diabetes over at least 15 days post-calibration.

Main Results:

  • Measurement accuracy was found to be independent of age, sex, and skin color.
  • For type 2 diabetes patients, 99.8% of measurements fell within A+B zones of the consensus error grid.
  • The mean absolute relative difference was 14.3%.

Conclusions:

  • The developed device overcomes calibration stability issues, enabling practical non-invasive glucose monitoring.
  • This innovation signals a new era in non-invasive diabetes monitoring and management.
  • The technology shows promise for widespread adoption in diabetes care.