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New Brain Stent Makes it Easier to Treat Aneurysms

While many brain aneurysms once required major surgery, a newly developed device allows doctors to treat bulging blood vessels with a greater chance of success and fewer complications.

During the new procedure, a brain stent, just like its heart-helping cousin, is used to stabilize the walls of blood vessels in the brain. As a result, this stent allows surgeons to fill the protruding aneurysm with a metal coil, stabilizing it and reducing the possibility of rupture.

"With this less invasive procedure, we can now treat patients we couldn’t help before." said Dr. Tim Tytle, a radiologist at Mercy Health Center in Oklahoma.

Small aneurysms are normally treated with tiny coils that a doctor inserts into the aneurysm to fill and prevent it from bursting. However, with larger, or "wide-neck." aneurysms—those more than 4 mm across—the coil can slip through the opening and into the blood vessel. So, a doctor previously had to remove a portion of the skull to place a small, metal clip on the bulging part of the blood vessel.

But instead of this lengthy and complicated procedure, doctors can now use a brain stent, which is folded up and sent to the necessary vessel in the brain through an artery in the leg. Once there, the stent opens up to support the walls of the blood vessel like a scaffold. It creates a blockage at the neck of the aneurysm, allowing doctors to insert the coil without the concern of it slipping through.

In a study of the device, in which 48 patients were treated for a wide-neck aneurysm with a brain stent, almost 90 percent were shown to have fewer complications from the procedure. Early clinical trials showed the brain stent to be so successful when compared to the clipping technique that the trials were halted—it was deemed unethical to continue assigning people to the group that received the latter surgery.

These successes prompted the FDA to approve the brain stent as a Humanitarian Use Device, a title granted to technology that can diagnose or treat a disease that affects fewer than 4,000 individuals in the United States each year.

The approval provides what many surgeons say is an important breakthrough in treating aneurysms.

"Simply put, this new device will save lives." said Dr. Mark Myers, co-director of interventional neuroradiology for the HealthEast Neurovascular Institute, one of the 40 centers in the United States using the new tool.