contrast extravasation
The abnormal leakage of contrast agent outside the intended vascular space during imaging procedures.
Full Definition
Contrast extravasation occurs when contrast material leaks from blood vessels into surrounding tissues during imaging procedures such as CT angiography or cardiac catheterization. This can result from vessel rupture, excessive injection pressure, or pre-existing vascular damage. In cardiac imaging, extravasation may be seen during coronary angiography as contrast spilling into the pericardial space (indicating vessel perforation) or into the myocardium. Recognition of contrast extravasation is critical as it may indicate serious complications requiring immediate intervention. On imaging, extravasation appears as contrast material in locations where it should not normally be present, often with a characteristic blush or staining pattern that persists beyond normal vascular washout.
Usage
Usage note: Always document location and clinical significance when extravasation is observed.
In Context
- "Mild contrast extravasation was noted at the injection site without hemodynamic compromise." — Procedural complication report
- "The procedure was terminated due to contrast extravasation suggesting coronary perforation." — Cardiac catheterization report