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

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.
• 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.