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Related Experiment Videos

Implantable electrocatalytic glucose sensor

W Lager1, I von Lucadou, H Nischik

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

Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Metabolisme
|November 1, 1994
PubMed
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A novel electrocatalytic glucose sensor for in vivo use was developed for long-term diabetes management. This implantable sensor accurately monitored glucose levels in sheep for over 130 days, showing potential for closed-loop insulin control.

Area of Science:

  • Biomedical Engineering
  • Electrochemistry
  • Diabetes Technology

Background:

  • Diabetes mellitus requires continuous glucose monitoring for effective management.
  • Existing glucose monitoring methods have limitations in long-term in vivo applications.
  • Closed-loop systems for insulin delivery necessitate reliable and stable glucose sensors.

Purpose of the Study:

  • To develop and evaluate an electrocatalytic glucose sensor for long-term in vivo glucose monitoring.
  • To assess the sensor's performance and biocompatibility for potential clinical use in diabetes therapy.
  • To validate the sensor's accuracy and feasibility for closed-loop insulin dosage control.

Main Methods:

  • Development of a catheter-based electrocatalytic glucose sensor utilizing a platinum electrode.

Related Experiment Videos

  • In vivo implantation of the sensor in the vena cava of sheep for extended monitoring.
  • Simultaneous glucose level verification using enzymatic analysis of blood samples.
  • Histological examination to assess material biocompatibility after explantation.
  • In vivo calibration experiments during glucose tolerance tests.

    • Main Results:

    • Successful long-term glucose determination in sheep for over 130 days.
    • Tolerable deviations from reference measurements with a mean error of 2.5 mmol/l.
    • Histological examination confirmed good biocompatibility of the implantable sensor materials.
    • Demonstrated feasibility of in vivo calibration for accurate glucose readings.

    Conclusions:

    • The developed electrocatalytic glucose sensor shows promise for long-term in vivo monitoring in diabetes management.
    • The sensor exhibits good biocompatibility and stability, suitable for extended implantation.
    • The technology supports potential for integration into closed-loop systems for automated insulin delivery.