Single-Center Preliminary Experience with Gutter-Plugging Chimney Stent-Graft for Aortic Dissection

Area of Science:

• Vascular Surgery
• Endovascular Interventions
• Aortic Disease Management

Background:

• Aortic dissection poses significant risks, often requiring complex interventions.
• Revascularization of the left subclavian artery is crucial in certain aortic dissection repair strategies.
• Novel endovascular devices are needed to improve treatment outcomes.

Purpose of the Study:

• To evaluate the early 2-year outcomes of the Longuette™ gutter-plugging chimney stent-graft.
• To assess the safety and efficacy of this novel device for left subclavian artery revascularization in aortic dissection.
• To report the technical success and complication rates in a single-center clinical trial.

Main Methods:

• A prospective study involving 34 patients with aortic dissection treated with Longuette™ stent-grafts.
• The study focused on left subclavian artery revascularization.
• Primary outcomes included freedom from major adverse events within 30 days and 12-month success rates.

Main Results:

• 100% immediate technical success rate with no conversions to open repair.
• Low rates of endoleaks (Type Ia: 8.8%, Type II: 2.9%) and one stent stenosis/occlusion.
• No deaths, ruptures, strokes, paraplegia, or stent migration observed during 2-year follow-up.

Conclusions:

• The Longuette™ stent-graft demonstrates encouraging initial results for left subclavian artery revascularization.
• A high technical success rate was achieved, suggesting potential efficacy.
• Further multicenter studies are necessary to confirm long-term durability.