Guo's Subclavian Artery Reconstruction: The Prospective, Multiple Center Study of WeFlow-Tbranch Stent Graft System(GUEST Study)

Inclusion Criteria:

1. Patients aged 18 to 80 years old, no gender limitation;
2. Able to understand the purpose of the trial, participate in the trial voluntarily withinformed consent form signed by the patient him/herself or his or her legalrepresentative, and willing to complete follow-up visits as required under theprotocol;
3. Diagnosed as Stanford type B aortic dissection and needed reconstruction of the leftsubclavian artery;
4. The diameter of the proximal anchoring area (the aorta at the posterior edge of theleft common carotid artery) range: 18～42mm;
5. The length of the proximal anchoring area (the distance from the rear edge of the leftcommon carotid artery opening to the first breach) ≥15mm;
6. The distance between the left common carotid artery and the left subclavian artery ≥5mm;
7. The distance between the left vertebral artery and the opening of the left subclavianartery is ≥15mm, the diameter of the starting part of the left subclavian artery is 6～20mm
8. With proper femoral artery, iliac artery, and brachial artery access, endovasculartreatment of the aorta can be performed.

Exclusion Criteria:

1. Pregnant, breastfeeding or cannot contraception during the trial period;
2. Participated in clinical trials of other drugs or devices during the same period;
3. The same operation requires intervention in other vascular diseases (such as coronaryartery, renal artery, superior mesenteric artery, etc.), and the postoperative drugtreatment plan is therefore affected;
4. Allergic to contrast agents, anesthetics, patches, and delivery materials;
5. Cannot tolerate anesthesia;
6. Severe liver, kidney, lung, and heart function abnormalities before surgery [Serumcreatinine exceeds 2 times the upper limit of normal; Alanine aminotransferase (ALT)or aspartate aminotransferase (AST) exceeds 5 times the upper limit of normal; Serumtotal bilirubin (STB) more than 2 times the upper limit of normal; Left ventricularejection fraction is lower than normal by cardiac color Doppler ultrasoundexamination];
7. True/false thoracic aortic aneurysm
8. History of myocardial infarction, TIA or cerebral infarction within the past 3 months;
9. Contraindications to antiplatelet drugs and anticoagulants
10. Life expectancy is less than 12 months (such as advanced malignant tumors)
11. Acute systemic infection
12. Severe stenosis or calcification in the anchoring area at the proximal end of thestent, easily lead to the stent graft difficult adherent
13. Investigator judged that not suitable for interventional treatment.