Alteration of intraaneurysmal hemodynamics by placement of a self-expandable stent. Laboratory investigation.

摘要: Object Development of a flexible self-expanding stent system and stent-assisted coiling technique facilitates endovascular treatment wide-necked brain aneurysms. The hemodynamic effect self-expandable placement across the neck aneurysm has not been well documented in patient-specific models. Methods Three silicone models based on clinical images were used this study. Model 1 was constructed from internal carotid artery–ophthalmic artery aneurysm, Models 2 3 small middle cerebral Neuroform stents placed vitro models, flow structures compared before after placements. Flow velocity fields acquired with particle imaging velocimetry. Results In 1, clockwise, single-vortex pattern observed dome stenting performed. There multiple vortices, very fast stream new...