run-off vessel
Distal arterial vessels that provide outflow from a more proximal arterial segment, particularly in the lower extremities.
Full Definition
Run-off vessels refer to the distal arterial circulation that receives blood flow from more proximal arterial segments, most commonly used in reference to the three major arteries of the lower leg: the anterior tibial, posterior tibial, and peroneal arteries. These vessels represent the final common pathway for blood flow to the foot and are critical for limb salvage in patients with peripheral arterial disease. Assessment of run-off vessels is essential for planning revascularization procedures, as adequate outflow is necessary for successful bypass grafting or endovascular interventions. The number and quality of patent run-off vessels directly impacts the success of proximal interventions.
Usage
Usage note: Hyphenate when used as compound adjective; may appear as 'runoff' in some contexts.
In Context
- "The patient has poor run-off vessels with occlusion of two of the three tibial arteries." — Vascular surgery consultation
- "Adequate run-off vessel patency is essential for successful femoral-popliteal bypass." — Surgical planning note