[The clinical effect of three dimensional print guided F/B-TEVAR vascular endoluminal repair of anastomotic leaks after open surgery for type A aortic dissection].

<b>Objective:</b> To evaluate the clinical value of three-dimensional(3D) printing-assisted fenestrated/branched endovascular aortic repair (F/B-TEVAR) for the treatment of endoleak after open surgery for type A aortic dissection. <b>Methods:</b> A multi-center retrospective case series analysis was conducted on 16 patients with anastomotic leakage following Stanford type A aortic dissection open repair, admitted to 12 medical centers between January 2019 and December 2023. All surgeries were led by the vascular surgery team from Department of Vascular Surgery, Nanjing Drum Tower Hospital. The study included 12 males and 4 females, with an age of (58.1±8.2) years (range: 42 to 75 years). Preoperative patient-specific 3D-printed models or 3D parametric surface topological guides were created based on aortic CT angiography data. These models assisted intraoperative external positioning of fenestration sites, combined with stent diameter selection and inner branch techniques to complete endovascular repair. Surgical procedures, complications, and clinical outcomes were evaluated, with follow-up CT imaging to assess efficacy. <b>Results:</b> All patients successfully underwent surgery without conversion to open repair. One patient had distal stent migration from a prior open repair, requiring intraoperative coverage of the main stent window and conversion to an in situ fenestration procedure. The mean operative time was (332.6±111.2)minutes (range: 80 to 460 minutes). No renal failure, paraplegia, or branch artery loss occurred. Postoperative follow-up (<i>M</i>(IQR)) was 18(18) months(range: 6 to 36 months), with follow-up rates of 16/16 at 6 months, 10/16 at 12 months, 8/16 at 24 months, and 2/16 at 36 months. During follow-up, endoleak occurred in 3 patients, cerebral infarction in 1 patient, and death in 1 patient. The remaining patients demonstrated stable stent positioning, patent branches, and no endoleak. <b>Conclusion:</b> 3D technology-guided F/B-TEVAR shows favorable mid-to short-term outcomes in treating anastomotic leakage after open repair of type A aortic dissection.