stent fracture
Mechanical failure of an implanted stent resulting in discontinuity of the stent structure, often leading to restenosis or occlusion.
Full Definition
Stent fracture is a mechanical complication of endovascular interventions characterized by structural disruption of the stent framework, ranging from single strut fractures to complete stent separation. This phenomenon is more commonly observed in locations subject to external compression or repeated mechanical stress, such as the superficial femoral artery or areas crossing joints. Stent fractures can lead to restenosis, acute thrombosis, or vessel perforation due to sharp metal fragments. Risk factors include stent overlapping, vessel tortuosity, calcification, and mechanical stress from muscular compression. Detection typically requires careful fluoroscopic examination or CT angiography, as routine duplex ultrasound may miss subtle fractures.
Usage
Usage note: Do not hyphenate as noun phrase; specific to endovascular devices, not bone fractures.
In Context
- "Fluoroscopy revealed stent fracture at the adductor hiatus with associated restenosis." — surveillance imaging report
- "The risk of stent fracture is higher in the superficial femoral artery due to repetitive compression." — procedural risk assessment