Medical News Today -- A new device to treat brain aneurysms with stents improves access to the blood vessels allowing endovascular neurosurgeons to offer the minimally invasive technique to patients with complex cases. Dr. Demetrius Lopes, an endovascular neurosurgeon at Rush University Medical Center, was the first in the U.S. to use the new delivery system, called the Neuroform EZ™ Stent System.