Flow diversion is an endovascular treatment for brain aneurysms. A stent-like device  placed in the parent artery diverts blood flow away from the aneurysm.   


Flow diverter stents like the Pipeline™ Flex embolization device redefine treatment for large or giant wide-necked brain aneurysms by reconstructing the parent artery and allowing the vessel to heal.1, 2  This device features a braided cylindrical mesh tube that is implanted across the base or neck of the aneurysm.

Aneurysm Pipeline Illustration

Before Flow Diversion

Blood flows into the aneurysm.

Aneurysm Pipeline Illustration

Flow Diversion Technique

A flow-diverter stent disrupts the flow of blood from the parent artery into the aneurysm, gradually slowing the flow of blood into the aneurysm and, over time, preventing blood from entering the aneurysm altogether.

Aneurysm Pipeline Illustration

After Flow Diversion

As the body’s natural healing process works, the aneurysm shrinks.

Aneurysm Flow Diversion with Pipeline Flex Device - (02:40)

View an animation of aneurysm flow diversion with the Pipeline Flex embolization device.
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Clinical studies like the PUFs trial, and its 5-year follow-up, demonstrate that flow diversion with the Pipeline Flex device is safe and effective.3


Becske, T. et al. Pipeline for Uncoilable or Failed Aneurysms. Results from a Multicenter Clinical Trial. Radiology .Published online, Feb 15, 2013.


Kallmes, DF et al. International Retrospective Study of the Pipeline Embolization Device: A Multicenter Aneurysm Treatment Study. AJNR. Published online, Oct 29, 2014. 


Becske, T. et al. Long-term clinical and angiographic outcomes following Pipeline Embolization Device treatment of complex internal carotid artery aneurysms. Five-year results of the Pipeline for Uncoilable of Failed Aneurysms trial. www.neurosurgery-online.com. Volume 80. January 2017.