Novel Flow Diverter Promotes Brain Aneurysm Healing

A new cobalt chromium flow diverter offers effortless delivery, predictable deployment, and excellent vessel wall apposition.

The Stryker Corporation (Kalamazoo, MI, USA) Surpass Evolve flow diverter is a small 64-wire cobalt chromium self-expanding braided stent that is used to direct blood flow in an intracranial artery away from a weakened blood vessel sac or aneurysm. The number of braids and the design of the braid angle have been optimized to maintain high mesh density and radial pressure for reliable implant opening, distal to proximal. Features include smooth delivery and low push forces, even when deployed in tortuous anatomy.


The Surpass Evolve flow diverter can be positioned using standard interventional devices, including most appropriately sized sheath or guide catheter, appropriately sized intermediate catheter, and the Stryker Excelsior XT-27 Standard Straight microcatheter with a 135cm or 150cm length.

“This device builds on the success of Surpass Streamline, offering a highly optimized and easy to use flow diverter. By increasing the braid angle, the novel 64-wire device delivers excellent flow diversion and a highly flexible implant for enhanced vessel wall contact,” said Ajay Wakhloo, MD, who completed the first case in the United States. “The higher mesh density of Surpass Evolve versus traditional 48-wire flow diverters may lead to faster aneurysm occlusion for patients.”

“Surpass Evolve Flow Diverter is the culmination of many years of flow diversion research, extensive physician feedback from around the world, and Stryker's engineering prowess. This high performing device will be a great addition to our hemorrhagic portfolio to help physicians in the treatment of brain aneurysms,” said Mark Paul, president of Stryker's neurovascular division. “Stryker is dedicated to working with our customers to bring life-saving technologies to patients suffering from brain aneurysms.”

While originally indicated for wide-necked or fusiform aneurysms from the petrous segment to the clinoid segment of the internal carotid artery (ICA), flow diversion today is being more broadly applied to small aneurysms, anterior cerebral artery aneurysms, recurrent aneurysms, and other endoluminal and intra-saccular defects.

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