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A brain aneurysm is a balloon-like bulge in the wall of a brain artery. If the aneurysm ruptures and bleeds, nearby brain tissues may be damaged. This can cause a stroke, which can be fatal. To prevent these problems, treatment may be needed right away. Your doctor may recommend that you have a procedure called embolization to treat your aneurysm. This sheet tells you more about how the procedure is done.
The procedure is done in an x-ray lab. It takes about 1-2 hours.
To keep you free of pain during the procedure, you’ll be given medication. This is called anesthesia. You may be given general anesthesia. This puts you into a state like deep sleep through the procedure. Or you may be given sedation with local instead. Sedation makes you relaxed and sleepy. Local anesthesia numbs the areas to be worked on.
For the procedure, a long, thin tube called a catheter is used. A small incision is made at the site where the catheter will be inserted. This is most often in the groin. The catheter is then passed through the incision and placed into an artery in the groin. The catheter is moved up through the artery to the brain.
Contrast fluid (x-ray dye) is sent through the catheter. This helps the artery and catheter show up better on x-rays. The movement of the catheter can be seen on a video monitor.
The catheter is used to place thin metal coils into the aneurysm. These coils cause a blood clot to form in the aneurysm. This clot seals the aneurysm and prevents it from bleeding.
When the procedure is complete, the catheter is removed.
You’ll need to lie still for 4-6 hours after the procedure. Pressure may be applied to the site to help reduce the risk of bleeding. Once stable, you’ll be moved to a hospital room. You may need to stay in the hospital for 1-4 weeks. This depends on the extent of damage caused by the aneurysm. While you’re in the hospital, more imaging tests will be done. These help ensure the coils were placed properly. They also help check that there is no further bleeding.
Bruising, bleeding, or infection at the catheter insertion site
Swelling or bleeding in the brain
Temporary or permanent neurologic problems including weakness, paralysis, loss of vision, confusion, loss of speech, loss of memory
Problems due to contrast fluid, including allergic reaction or kidney damage
Damage to an artery