Microvascular occlusion clamps off the artery leading to an aneurysm. This prevents bleeding and rupture. Sometimes a bypass procedure is done as well, rerouting blood vessels to healthy areas of the brain. A portion of the skull is removed (called a craniotomy) and restored during this complex, open surgery.

Microvascular occlusion often treats a brain aneurysm that has ruptured and caused damage to the artery. It will not fix damaged areas of the brain, but it can improve quality of life by stopping bleeding.

Brain Aneurysm
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An aneurysm is a weakened blood vessel in the brain that collects blood. The bulging, blood-filled pocket can put pressure on parts of the brain, pressing on nearby nerves. This can cause symptoms or cause the blood vessel to rupture (hemorrhage).
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