title: A flow-diverting stent is not a pressure-diverting stent.
abstract: The approach for treatment of large and fusiform intracranial aneurysms has evolved from stent-assisted coiling to treatment with flow-diverting stents. The treatment results for these stents are promising; however, early postprocedural aneurysm rupture has been described. The exact cause of rupture is unknown but might be related to intra-aneurysmal flow and pressure changes. We measured intra-aneurysmal pressure before, during, and after placement of a flow-diverting stent by using a dual-sensor guidewire. The pressure inside the aneurysm momentarily decreased during placement but was restored to baseline values within minutes. The flow-diverting stent does not seem to protect the aneurysm from the stress induced by pressure or pressure changes within the lumen.
authors.affiliation: Department of Radiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. j.j.schneiders@amc.uva.nl
authors.forename: J J
authors.initials: JJ
authors.lastname: Schneiders
authors.forename: E
authors.initials: E
authors.lastname: VanBavel
authors.forename: C B
authors.initials: CB
authors.lastname: Majoie
authors.forename: S P
authors.initials: SP
authors.lastname: Ferns
authors.forename: R
authors.initials: R
authors.lastname: van den Berg
mesh_terms: D062186:Arterial Pressure; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications / Q000503:physiopathology* / Q000601:surgery*; D020767:Intracranial Thrombosis / Q000209:etiology / Q000517:prevention & control*; D008297:Male; D061185:Mechanical Thrombolysis / Q000379:methods*; D008875:Middle Aged; D016896:Treatment Outcome