runoff
Imaging evaluation of peripheral arteries from the aortoiliac region to the pedal vessels.
Full Definition
Runoff refers to comprehensive angiographic imaging of the peripheral arterial system, typically extending from the abdominal aorta and iliac arteries through the femoral, popliteal, and tibial vessels to the pedal circulation. This examination is commonly performed in patients with peripheral arterial disease to assess the extent and severity of stenoses or occlusions throughout the lower extremity arterial tree. Runoff studies are essential for planning revascularization procedures, as they provide a roadmap of the entire vascular system including potential target vessels and collateral pathways. The term emphasizes the sequential flow of contrast material through successive arterial segments.
Usage
Usage note: Used as a noun in vascular imaging; avoid confusion with the general term 'run-off'.
In Context
- "CT angiography runoff demonstrated severe stenosis in the superficial femoral artery." — Vascular surgery consultation
- "The patient underwent diagnostic angiography with runoff to evaluate claudication symptoms." — Interventional procedure report