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RF Remote Blood Glucose Sensor and a Microfluidic Vascular Phantom for Sensor Validation.

Muhammad Farhan Affendi Mohamad Yunos1, Rémi Manczak2, Cyril Guines2

  • 1Department of Electrical and Computer Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, Kuala Lumpur 53100, Malaysia.

Biosensors
|December 23, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel radio frequency (RF) sensor for continuous, remote blood glucose monitoring. The non-invasive sensor offers a promising alternative to traditional methods for diabetes management.

Keywords:
PDMSRF sensorblood glucose monitoringdiabetesglucometernon-invasive sensorvascular phantom

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Area of Science:

  • Biomedical Engineering
  • Sensor Technology
  • Diabetes Management

Background:

  • Diabetes mellitus poses a significant global health challenge, necessitating improved monitoring solutions.
  • Current invasive glucometers offer discrete measurements and are unsuitable for continuous, long-term monitoring due to discomfort and cost.
  • Remote, continuous self-monitoring of blood glucose levels is crucial for effective diabetes management.

Purpose of the Study:

  • To develop and validate a non-invasive radio frequency (RF) sensor for continuous blood glucose monitoring.
  • To assess the sensor's ability to detect variations in glucose concentrations by measuring changes in the dielectric constant.
  • To evaluate the sensitivity and limit of detection (LOD) of the proposed RF biosensor.

Main Methods:

  • A radio frequency (RF) sensor utilizing a stepped impedance resonator operating at 3.528 GHz was designed and fabricated.
  • A microfluidic device mimicking human blood veins was created using PDMS to test the sensor.
  • The RF sensor's response to varying glucose concentrations (0-240 mg/dL) was measured using a network analyzer via S11 parameters.

Main Results:

  • The RF sensor demonstrated a sensitivity of 264.2 kHz/mg·dL⁻¹ for detecting glucose concentration changes.
  • The limit of detection (LOD) for the biosensor was calculated to be 29.89 mg/dL.
  • The stepped impedance resonator exhibited a high Q factor of 1455.

Conclusions:

  • The developed RF sensor provides a non-invasive method for continuous blood glucose monitoring.
  • This technology holds potential for improving diabetes management by enabling remote and frequent self-monitoring.
  • The sensor's performance validates its utility as a biosensor for detecting glucose level variations.