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Use of abdominal chimney grafts is feasible and safe: short-term results.

TitleUse of abdominal chimney grafts is feasible and safe: short-term results.
Publication TypeJournal Article
Year of Publication2010
AuthorsDonas, K. P., Torsello G., Austermann M., Schwindt A., Troisi N., & Pitoulias G. A.
JournalJ Endovasc Ther
Volume17
Issue5
Pagination589-93
Date Published2010 Oct
ISSN1545-1550
KeywordsAged, 80 and over, Aortic Aneurysm, Abdominal, Aortography, Blood Vessel Prosthesis, Blood Vessel Prosthesis Implantation, Endoleak, Endovascular Procedures, Feasibility Studies, Germany, Graft Occlusion, Vascular, Humans, Kaplan-Meier Estimate, Male, Prosthesis Design, Reoperation, Stents, Thrombectomy, Time Factors, Tomography, X-Ray Computed, Treatment Outcome
Abstract

PURPOSE: To present our initial experience with the use of chimney grafts in endovascular aneurysm repair (EVAR) of abdominal aortic aneurysms (AAAs) with challenging anatomy.METHODS: Among 390 EVAR cases performed at our institution between November 2008 and February 2010, 15 patients (all men; mean age 81.8 years) underwent EVAR with synchronous placement of chimney grafts. The chimney technique involved placing covered stents parallel to the main aortic stent-graft to preserve or rescue flow to aortic branch vessels while extending the proximal fixation zone. All patients presented with pararenal aortic aneurysms with short necks (between 0 and 10 mm long) that required either suprarenal clamping to tailor a proximal anastomosis in open repair or suprarenal fixation to anchor an endoprosthesis. Chimney grafts were implanted into 10 left renal and 5 right renal arteries.RESULTS: The immediate technical success was 100%. One early type II endoleak due to retrograde flow from the inferior mesenteric artery was detected and is under surveillance. Mean follow-up was 6.8 months (range 1-13). One chimney graft occluded 45 days postoperatively; the patient underwent open thrombectomy of the left renal artery and iliorenal bypass. The creatinine value at discharge was 1.6 mg/dL, and resting renal scintigraphy showed 36% perfusion for the left kidney and 64% for the right kidney. During follow-up, no patient required hemodialysis; no aneurysm-related deaths were noted.CONCLUSION: This limited experience demonstrates that the use of abdominal chimney grafts is feasible and safe. Long-term results in larger patient cohorts are needed evaluate the utility of this alternative endovascular technique.

DOI10.1583/10-3083.1
Alternate JournalJ. Endovasc. Ther.
PubMed ID20939713

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