aortic stent graft migration
Displacement of an endovascular aortic stent graft from its original deployment position. May result in loss of seal and require reintervention.
Full Definition
Aortic stent graft migration refers to the displacement of an endovascularly placed aortic stent graft from its intended position within the aorta. This complication can occur in both thoracic and abdominal endovascular repairs and may result from inadequate fixation, progressive aortic remodeling, device oversizing, or progression of underlying aortic disease. Migration is typically classified by direction (proximal or distal) and magnitude, with displacement greater than 10mm generally considered clinically significant. The condition may lead to Type I endoleak, loss of branch vessel coverage, or inadequate aneurysm exclusion. Prevention strategies include proper sizing, adequate seal zones, and appropriate device selection, while treatment may require additional stent grafts, open surgical conversion, or balloon molding.
Usage
Usage note: Specify direction and magnitude of migration; document associated complications if present.
In Context
- "Follow-up CT showed 12mm proximal migration of the thoracic stent graft." — Surveillance imaging report
- "The patient required reintervention for stent graft migration with associated Type Ia endoleak." — Complication management note