Cerebrovascular Disease & Stroke Prevention

UBNS is committed to delivering rapid stroke treatment. Our world-renowned endovascular team, led by Drs. Elad Levy, Adnan Siddiqui, Kenneth Snyder. and Jason Davies, is on-call 24-hours a day to treat any stroke patient admitted to the Gates Vascular Institute, a facility fully-equipped to provide a full gamut of comprehensive stroke treatment options using state-of-the-art, minimally invasive techniques, many of which were pioneered right here in Buffalo.

UBNS is the integral, neuroendovascular component of the renowned Kaleida Health Stroke Care Team at the Gates Vascular Institute. This specialized team is a highly-skilled multidisciplinary blend of expertly-trained neurosurgeons, neurologists, and emergency medical professionals trained in comprehensive acute stroke care.


Acute stroke occurs when a major artery carrying blood to the brain is suddenly blocked by a clot. As with a heart attack, quickly reopening the vessel to restore blood flow to the affected brain is imperative to successful treatment and recovery.

Intracranial Aneurysm

An intracranial aneurysm is a “ballooning” of a blood vessel that forms in the brain resulting in a dangerous weakness in the vessel wall. Approximately 5% of the general population harbors an intracranial aneurysm at any given time.

When an aneurysm in the brain ruptures it is called a hemorrhagic stroke and is the most devastating form. Evidence suggests that patients with emergent intracranial aneurysms who are transferred to comprehensive stroke centers like the Gates Vascular Institute (GVI) where specialized multidisciplinary teams and neurointensive care management are readily available fare much better than those who are treated at smaller, less specialized hospitals. In general, aneurysm patients also do best at hospitals where endovascular neurosurgeons direct every stage of patient care.

The nationally recognized neuroendovascular team at UBNS specializes in the latest coil embolization techniques as well as other cerebrovascular diseases including arteriovenous fistulas (AVFs), arteriovenous malformations (AVMs), carotid artery disease, intracranial stenosis, and vascular tumors.

Translational Research

UBNS is continually immersed in ground-breaking clinical trial research to advance the science behind the prevention and treatment of cerebrovascular disease. Our close affiliation with the Canon Stroke & Vascular Research Center, an internationally recognized hub of translational research whereby our physicians readily transfer innovations in treatment from our stroke research lab to the clinical setting for immediately observable results, offers our patients the latest innovative therapies, in addition to more conventional treatment options.

Meet our Pediatric Neurosurgery Physicians

Veetai Li


Clinical Team

Pediatric Neurosurgery

Minimally Invasive Brain Endoscopy

Renée Reynolds


Clinical Team

Pediatric Neurosurgery

Minimally Invasive Brain Endoscopy

WNY Locations

  • Dunkirk

  • John R. Oishei Children’s Hospital

  • Erie County Medical Center

  • Buffalo General Medical Center

  • Roswell Park Comprehensive Cancer Center

  • Gates Vascular Institute

  • Summit Park Office Complex

  • Oishei Children’s Outpatient Center

  • Brook Bridge Medical Complex

  • Conventus Building

  • Comprehensive Neuroscience Center

Surgical Locations: 

Buffalo General Medical Center, Gates Vascular Institute, John R. Oishei Children’s Hospital, Millard Fillmore Suburban Hospital, Sisters of Charity Hospital, Niagara Falls Memorial Medical Center, Mercy Hospital of Buffalo, Kenmore Mercy Hospital

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Publications | August 14, 2020

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The Professional and Personal Impact of the Coronavirus Pandemic on US Neurointerventional Practices: A Nationwide Survey

In the News | January 23, 2017

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Dr. Davies awarded the UB CTSA KL2 grant

The KL2 Research Career Development Program supports state-of-the-art clinical and translational research and provides young investigators with the knowledge and skills necessary to perform high-impact research and succeed in today’s highly competitive research environment.  

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UBNS Residency Program

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