vessel patency
State of vessel luminal continuity allowing unobstructed blood flow, typically assessed following intervention or in bypass grafts.
Full Definition
Vessel patency describes the maintenance of luminal continuity and unobstructed blood flow through native vessels, bypass grafts, or endovascular devices. Assessment involves evaluation of flow characteristics, luminal dimensions, and absence of occlusive pathology using multiple imaging modalities including duplex ultrasound, CT angiography, and catheter angiography. Patency rates are commonly reported as primary (unassisted), assisted primary (with intervention to maintain patency), and secondary (restored after occlusion) categories. Factors affecting long-term patency include vessel quality, hemodynamic conditions, patient comorbidities, and technical factors. Regular surveillance protocols enable early detection of patency threats and timely intervention to preserve circulation.
Usage
Usage note: Specify patency category (primary, assisted primary, secondary) when reporting surveillance results.
In Context
- "One-year vessel patency of the femoral-popliteal bypass remained excellent with normal flow velocities." — Bypass graft surveillance report
- "Loss of vessel patency in the target vessel necessitated repeat balloon angioplasty within six months." — Endovascular follow-up study