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

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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.




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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