[Study on detection methods of interstitial fluid glucose concentration based on infrared attenuated total...

Area of Science:

• Biomedical Engineering
• Spectroscopy
• Analytical Chemistry

Background:

• Continuous glucose monitoring (CGM) is crucial for diabetes management.
• Interstitial fluid glucose concentration is a key indicator for CGM.
• Mid-infrared Attenuated Total Reflection (MIR-ATR) Spectroscopy offers potential for analyzing biological molecules like glucose.

Purpose of the Study:

• To investigate the feasibility of using MIR-ATR Spectroscopy for direct subcutaneous glucose detection.
• To evaluate MIR-ATR Spectroscopy's effectiveness in both natural and fluid-permeated skin states.
• To explore advanced spectroscopic analysis techniques for glucose detection.

Main Methods:

• Collected MIR-ATR spectral data from human fingers in natural skin state.
• Collected MIR-ATR spectral data after permeating interstitial fluid to the skin surface using ultrasound and vacuum.
• Applied Two-Dimensional (2D) Correlation Spectroscopy for detailed spectral analysis.

Main Results:

• MIR-ATR Spectroscopy demonstrated inability to directly detect subcutaneous glucose concentration through intact skin.
• Analysis indicated that MIR-ATR Spectroscopy could not directly penetrate the skin to obtain subcutaneous glucose information.
• Permeating interstitial fluid to the skin surface showed potential for MIR-ATR Spectroscopy application.

Conclusions:

• Direct subcutaneous glucose detection using MIR-ATR Spectroscopy is currently not feasible.
• Permeating interstitial fluid to the skin surface is a promising strategy for future non-invasive glucose monitoring.
• Further research into physical or chemical methods for interstitial fluid permeation is warranted.