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Related Experiment Videos

Contrast media extravasation during dynamic CT: detection with an extravasation detection accessory

R C Nelson1, F A Anderson, B A Birnbaum

  • 1Department of Radiology, Duke University Medical Center, Durham, NC 27710, USA.

Radiology
|December 9, 1998
PubMed
Summary

A novel device monitors skin impedance during power injection to detect contrast media extravasation. This technology successfully identified extravasation events in animal and human studies, improving patient safety in computed tomography.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Extravasation of contrast media during mechanical power injection is a risk in dynamic computed tomography (CT).
  • Current detection methods are limited, potentially leading to complications.
  • Early detection is crucial for patient safety and effective treatment.

Purpose of the Study:

  • To develop and evaluate a device for real-time detection of contrast media extravasation during mechanical power injection in dynamic CT.
  • To assess the device's efficacy in both animal models and human subjects.

Main Methods:

  • A pliable adhesive patch was applied over the intravenous cannula site.
  • The patch monitored electrical skin impedance, connected to the power injector.

Related Experiment Videos

  • The system detected extravasation by analyzing the rate of change or slope of impedance over time, triggering a pause in injection.

    • Main Results:

    • The device successfully monitored skin impedance and detected extravasation events in both animal and human studies.
    • Extravasation of ionic contrast agents resulted in decreased skin impedance.
    • Extravasation of nonionic contrast agents led to increased skin impedance.

    Conclusions:

    • Electrical skin impedance monitoring is a viable method for detecting contrast media extravasation during mechanical power injection.
    • The developed device offers a promising solution for enhancing patient safety in dynamic CT procedures.
    • This technology has the potential to reduce complications associated with contrast media extravasation.