runoff
The distal vessels that receive blood flow from a proximal arterial system.
Full Definition
In vascular imaging, runoff refers to the peripheral or distal arterial vessels that receive blood flow from more proximal arterial segments. The term is commonly used in lower extremity angiography to describe the tibial and pedal vessels that provide outflow from the popliteal artery. Good runoff implies patent distal vessels that can accommodate blood flow, while poor runoff suggests compromised distal circulation due to occlusive disease. Assessment of runoff is crucial for planning revascularization procedures and predicting procedural success in treating peripheral arterial disease.
Usage
Usage note: Typically used in context of peripheral arterial disease and lower extremity imaging.
In Context
- "The patient demonstrated poor runoff with occlusion of two of three tibial vessels." — Peripheral angiography report
- "Good runoff to the foot was maintained via the posterior tibial artery." — Vascular surgery consultation