runoff study
Angiographic examination of peripheral arteries from aorta to pedal vessels to assess patency throughout the arterial tree. Essential for surgical planning in peripheral arterial disease.
Full Definition
A runoff study is a comprehensive angiographic evaluation that examines the arterial circulation from the abdominal aorta through the peripheral vessels to the pedal arteries, providing a complete assessment of arterial patency and flow. This examination is crucial for evaluating patients with peripheral arterial disease, particularly those being considered for revascularization procedures. The study typically includes imaging of the aortoiliac, femoropopliteal, and infrapopliteal segments in sequential phases to track contrast bolus progression. Modern runoff studies may be performed using CT angiography, MR angiography, or conventional digital subtraction angiography, with multi-station techniques allowing coverage of the entire arterial tree in a single examination.
Usage
Usage note: Two words when used as noun (runoff study); hyphenated when compound modifier (runoff-vessel patency).
In Context
- "The CT runoff study revealed multilevel disease with complete occlusion of the superficial femoral artery." — Vascular imaging report