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Updated: Aug 12, 2026

Contrast Enhanced Vessel Imaging using MicroCT
Published on: January 27, 2011
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.
Abstract:
To detect extravasation of contrast media during mechanical power injection at dynamic computed tomography, a 5 x 8-cm pliable adhesive patch was applied to the skin over the intravenous cannula and connected to the power injector with a cable to monitor electrical skin impedance. If the rate of change or the slope of impedance over time indicated an extravasation event, the power injector was set into a pause mode. In animal and human studies, monitoring with the device was successful. Extravasation of ionic contrast agents decreased impedance and that of nonionic agents increased impedance.
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