Abstract
Complex endovascular aneurysm repair (EVAR) most often refers to extension of the proximal seal zone with preservation of branch vessel patency, thereby expanding the applicability of aortic endografts from the infrarenal to the suprarenal aorta. Snorkel/chimney (ch-EVAR) and fenestrated EVAR (f-EVAR) are the two most commonly utilized advanced endovascular techniques to combat hostile proximal neck anatomy. The current literature examining this topic is limited to level II data and therefore should be interpreted with appropriate caution. Nevertheless, available data to date does provide low quality evidence supporting a promising trend towards improved perioperative outcomes, including reduced perioperative mortality, with complex EVAR compared to open surgical repair, although this early clinical benefit may come at the expense of increased need for secondary intervention.
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Ullery, B.W., Lee, J.T. (2017). Challenging AAA Neck Anatomy: Does the Fenestrated or Snorkel/Chimney Technique Improve Mortality and Freedom from Reintervention Relative to Open Repair?. In: Skelly, C., Milner, R. (eds) Difficult Decisions in Vascular Surgery. Difficult Decisions in Surgery: An Evidence-Based Approach. Springer, Cham. https://doi.org/10.1007/978-3-319-33293-2_5
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