title: Application of duplex US for characterization of endoleaks in abdominal aortic stent-grafts: report of five cases.
abstract: Endoleaks were detected with helical computed tomographic (CT) angiography in five patients after placement of an aortobiliac stent-graft. The leaks were subsequently evaluated with duplex ultrasonography (US) and, in four patients, with conventional aortography as well. CT angiography revealed a total of seven endoleaks, all of which were prospectively classified as reconstitution (type II) leaks. Duplex US demonstrated six of the seven endoleaks. At duplex US, two of the leaks were characterized as attachment-site (type I) leaks; these two diagnoses were confirmed during subsequent angiography and profoundly altered clinical care. As an adjunct to CT angiography in evaluating endoleaks, duplex US provides hemodynamic information that enables further characterization of the type of endoleak and facilitates appropriate clinical care.
authors.affiliation: Departments of Radiology, Thomas Jefferson University Hospital, Philadelphia, Pa 19035, USA. antje.greenfield@mail.tju.edu
authors.forename: Antje L
authors.initials: AL
authors.lastname: Greenfield
authors.forename: Ethan J
authors.initials: EJ
authors.lastname: Halpern
authors.forename: Joseph
authors.initials: J
authors.lastname: Bonn
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Wechsler
authors.forename: Mark B
authors.initials: MB
authors.lastname: Kahn
mesh_terms: D000368:Aged; D000792:Angiography; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging / Q000601:surgery*; D019917:Blood Vessel Prosthesis Implantation; D006801:Humans; D008297:Male; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D011446:Prospective Studies; D015607:Stents; D036542:Tomography, Spiral Computed; D018616:Ultrasonography, Doppler, Duplex