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Related Experiment Videos

An electrocatalytic glucose sensor for in-vivo application.

W Preidel1, S Saeger, I von Lucadou

  • 1Siemens AG, Corporate Research and Development, Erlangen, Germany.

Biomedical Instrumentation & Technology
|May 1, 1991
PubMed
Summary

A novel electrocatalytic sensor enables continuous glucose monitoring in blood. This implantable device demonstrated reliable performance for over two months in an in-vivo sheep study.

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Influence of paracetamol, sulfanilamide and ascorbic acid on the electrocatalytic glucose sensor.

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Area of Science:

  • Biomedical Engineering
  • Electrochemistry
  • Sensor Technology

Background:

  • Continuous glucose monitoring is crucial for diabetes management.
  • Existing methods often require frequent calibration or invasive procedures.
  • There is a need for long-term, implantable glucose sensors.

Purpose of the Study:

  • To develop and evaluate an electrocatalytic sensor for continuous blood glucose measurement.
  • To assess the sensor's selectivity and long-term stability in-vivo.
  • To establish a reliable method for real-time glucose quantification.

Main Methods:

  • Development of a flow-through electrocatalytic sensor for blood integration.
  • Utilizing electrochemical oxidation of glucose at a noble metal electrode.

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  • Employing a diffusion-limiting membrane and impedance analysis for selectivity.
  • Conducting in-vivo experiments in a sheep model.

    • Main Results:

    • The sensor demonstrated a direct proportionality between impedance parameters and blood glucose concentration.
    • Selectivity was achieved through membrane diffusion limitation and impedance analysis.
    • The sensor maintained reliable performance for 71 days post-implantation in a sheep.
    • In-vivo experiments validated the sensor's continuous monitoring capability.

    Conclusions:

    • The developed electrocatalytic sensor offers a promising solution for continuous glucose monitoring.
    • The impedance-based measurement principle provides a selective and stable detection method.
    • Long-term in-vivo stability suggests potential for clinical application in diabetes management.