• Sherif Sultan, Jamie Concannon, Dave Veerasingam, Wael Tawfick, Peter McHugh, Fionnuala Jordan, and Niamh Hynes.
• Vascular Surgery, Galway University Hospital, Galway, Ireland.
• Cochrane Db Syst Rev. 2022 Apr 1; 4 (4): CD012926CD012926.

BackgroundThoracoabdominal aortic aneurysms (TAAAs) are a life-threatening condition which remain difficult to treat. Endovascular and open surgical repair (OSR) provide treatment options for patients, however, due to the lack of clinical trials comparing these, the optimum treatment option is unknown.ObjectivesTo assess the effectiveness and safety of endovascular repair versus conventional OSR for the treatment of TAAAs.Search MethodsThe Cochrane Vascular Information Specialist searched the Cochrane Vascular Specialised Register, CENTRAL, MEDLINE, Embase, CINAHL and AMED databases and World Health Organization International Clinical Trials Registry Platform and ClinicalTrials.gov trials registers to 26 April 2021. We also searched references of relevant articles retrieved from the electronic search for additional citations.Selection CriteriaWe considered all published and unpublished randomised controlled trials (RCTs) and controlled clinical trials (CCTs) comparing endovascular repair to OSR for TAAAs for inclusion in the review. The main outcomes of interest were prevention of aneurysm rupture (participants without aneurysm rupture up to 5 years from intervention), aneurysm-related mortality (30 days and 12 months), all-cause mortality, spinal cord ischaemia (paraplegia, paraparesis), visceral arterial branch compromise causing mesenteric ischaemia or renal failure, and rate of reintervention.Data Collection And AnalysisTwo review authors independently screened all titles and abstracts identified from the searches to identify those that met the inclusion criteria. We planned to undertake data collection, risk of bias assessment, and analysis in accordance with Cochrane recommendations. We planned to assess the certainty of the evidence using GRADE.Main ResultsNo RCTs or CCTs met the inclusion criteria for this review.Authors' ConclusionsDue to the lack of RCTs or CCTs, we were unable to determine the safety and effectiveness of endovascular compared to OSR in patients with TAAAs and are unable to provide any evidence on the optimal surgical intervention for this cohort of patients. High-quality RCTs or CCTs addressing this objective are necessary, however conducting such studies will be logistically and ethically challenging for this life-threatening disease.Copyright © 2022 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.

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