Carotid artery disease is a major cause of ischemic stroke, driven by atherosclerotic narrowing of the internal carotid artery and the risk of plaque embolization. For appropriately selected patients, carotid artery stenting (CAS) offers a minimally invasive alternative to carotid endarterectomy, restoring lumen while managing the embolic risk that accompanies manipulation of an atherosclerotic lesion.
Contemporary device platforms
Modern carotid stents are self-expanding nitinol designs that balance radial force against conformability in a tortuous, mobile vessel. Open-cell geometries offer flexibility for angulated anatomy, while closed-cell and hybrid designs increase plaque scaffolding. Stent choice is matched to lesion morphology, vessel angulation, and plaque characteristics.
Embolic protection strategies
- Distal filter protection. A filter deployed beyond the lesion captures debris while maintaining antegrade flow during the procedure.
- Proximal protection. Flow arrest or reversal prevents debris from reaching the brain during lesion crossing, useful for high-risk plaque.
- Transcarotid approaches. Direct carotid access with flow reversal minimizes aortic arch manipulation in selected patients.
Patient selection
Selection weighs symptomatic versus asymptomatic disease, degree of stenosis, arch and vessel anatomy, age, and surgical risk. Patients with hostile necks, prior radiation, or restenosis after endarterectomy are often better served by an endovascular approach, while heavily calcified or thrombus-laden lesions require careful risk assessment. Shared decision-making within a neurovascular team is central.
Procedural principles and outcomes
Meticulous technique — stable access, embolic protection, appropriate pre- and post-dilation, and dual antiplatelet therapy — underpins good outcomes. Reported results in suitable candidates show stroke-prevention benefit comparable to surgery when performed by experienced operators with disciplined case selection.
INVAMED technologies in this space
INVAMED's neurovascular and embolic-protection portfolio spans access and navigation systems and dedicated protection devices; explore the neurovascular interventions category and the source-linked Clinical Evidence Library.
Device availability and approved indications vary by country. This content is prepared for healthcare professionals and does not replace clinical judgment or the instructions for use.