This study is the feasible study on a new technique of ZIPPER aortic arch stentgraft system

The study of ZIPPER aortic arch stentgraft system is a prospective, multicenter, single arm trial, which will enroll a total of 127 patients. The goal of this study is to evaluate the safety and efficacy of ZIPPER aortic arch stentgraft system in the treatment of patients with aortic arch dissections, residual dissection following ascending aorta surgical operation.

Inclusion Criteria:

• Age: 18-80 years of age.

Diagnosis and Anatomical Suitability:

Subacute or chronic aortic arch dissection requiring intervention, where the proximal end of the stent graft requires anchoring in Zone 0, and meets the following vascular anatomical criteria:

Ascending aorta (may include graft segments) ≥ 40 mm in length (measured from the sinotubular junction to the proximal edge of the IA along the centerline).

Proximal landing zone diameter ≥ 24 mm and ≤ 47 mm. Proximal landing zone length ≥ 20 mm. Diameters of the IA, LCCA, and LSA ≤ 24 mm and ≥ 6 mm, with lengths ≥ 20 mm. Suitable arterial access for endovascular intervention. Informed Consent: Capable of understanding the study purpose, voluntarily agreeing to participate, and providing written informed consent (by the subject or their legal representative). Willing to comply with follow-up requirements per the protocol.

Surgical Risk Assessment: Deemed high surgical risk (evaluated by at least two independent vascular or cardiac surgeons) or confirmed to have significant contraindications to open surgery.

Exclusion Criteria:

• Prior aortic intervention: History of open or endovascular repair of the descending or abdominal aorta.

Concurrent AAA requiring intervention: Coexisting abdominal aortic aneurysm requiring surgical intervention within 30 days.

Specific aortic pathologies: infectious aortitis, Takayasu arteritis, Marfan syndrome, or other connective tissue disorders.

Active systemic infection: Ongoing systemic infection or high risk of systemic infection.

Severe arch vessel disease: Severe stenosis, calcification, thrombosis, or tortuosity of the IA, LCCA, or LSA.

Acute ischemia: Bowel necrosis or lower limb ischemic necrosis. Pre-existing paraplegia. Post-cardiac transplant status. Recent cardiovascular events: Myocardial infarction or stroke within the past 3 months.

Advanced heart failure: NYHA Class IV or left ventricular ejection fraction (LVEF) <30%.

Active gastrointestinal bleeding: Active peptic ulcer or upper gastrointestinal bleeding within the past 3 months.

Hematologic abnormalities: Leukopenia (WBC < 3×10⁹/L), Anemia (Hb < 90 g/L), Coagulopathy, Thrombocytopenia (platelets < 50×10⁹/L).

Renal insufficiency: Serum creatinine > 221 μmol/L (2.5 mg/dL) or end-stage renal disease requiring dialysis (investigator discretion).

Severe hepatic dysfunction: ALT/AST > 5× upper limit of normal (ULN), Serum total bilirubin (STB) > 2× ULN.

High-risk intracranial lesions (any of the following):

1. Unruptured aneurysm ≥7 mm (anterior circulation) or ≥5 mm (posterior circulation)
2. Prior rupture or high-risk morphology (daughter sac, aspect ratio >1.6)
3. Intracranial arterial stenosis ≥50% with poor collateral flow. Contrast allergy. Pregnancy or lactation. Anesthesia/surgery contraindications: Severe comorbidities precluding tolerance to anesthesia or surgery.

Life expectancy < 12 months. Current participation in other drug or device clinical trials. Other exclusions: Any conditions deemed unsuitable for participation by the investigator.