title: The Safety of Using Large Amount (30 cc) of Onyx (Ethylene-vinyl Alcohol Copolymer) for the Treatment of Large Type II Endoleak after Endovascular Repair of Abdominal Aortic Aneurysm.
abstract: Endovascular aneurysm repair (EVAR) is associated with late complications including the development of endoleaks as major complications. Type II endoleak is the consequence of collateral retrograde flow from the aortic branches; generally from the lumbar arteries, inferior mesenteric artery, or middle sacral artery. The method and the ideal timing for the treatment of endoleaks remain controversial. We are presenting a case of successful treatment of a large type II endoleak using embolization with large amount of Onyx copolymer via a percutaneous transfemoralroute without any adverse outcome. A significant advantage of Onyx as opposed to glue is that it may be injected for a long period of time (20-60 minutes) with a lower risk for microcatheter entrapment. This case report suggests that much higher amount of Onyx can safely be used if needed to seal large endoleaks without adverse event.
authors.affiliation: Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammad Hasan
authors.initials: MH
authors.lastname: Namazi
authors.affiliation: Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Isa
authors.initials: I
authors.lastname: Khaheshi
authors.affiliation: Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Ali Reza
authors.initials: AR
authors.lastname: Serati
authors.affiliation: CareMore, Tucson, Arizona; Department of Medicine, University of Arizona College of Medicine, Tucson, Arizona.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Movahed
keywords: aneurysmal abdominal aorta; aortic aneurysm; aortic endograft; complications; endoleak; endovascular aneurysm repair; stenting; transcatheter intervention