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A Flow-Diverting Stent Is Not a Pressure-Diverting Stent

A Flow-Diverting Stent Is Not a Pressure-Diverting Stent SUMMARY: 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. ABBREVIATIONS: ICA internal carotid artery MCA middle cerebral artery http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Journal of Neuroradiology American Journal of Neuroradiology

A Flow-Diverting Stent Is Not a Pressure-Diverting Stent

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Publisher
American Journal of Neuroradiology
Copyright
Copyright © 2013 by the American Society of Neuroradiology.
ISSN
0195-6108
eISSN
1936-959X
DOI
10.3174/ajnr.A2613
pmid
21852372
Publisher site
See Article on Publisher Site

Abstract

SUMMARY: 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. ABBREVIATIONS: ICA internal carotid artery MCA middle cerebral artery

Journal

American Journal of NeuroradiologyAmerican Journal of Neuroradiology

Published: Jan 1, 2013

References