A flow-diverting stent is not a pressure-diverting stent

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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.

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Schneiders, J. J., VanBavel, E., Majoie, C. B., Ferns, S. P., & Van Den Berg, R. (2013). A flow-diverting stent is not a pressure-diverting stent. American Journal of Neuroradiology, 34(1). https://doi.org/10.3174/ajnr.A2613

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