Endovascular Embolization of Cerebral Aneurysm
(Endovascular Coiling of Cerebral Aneurysm)
by Cynthia M. Johnson, MA
Endovascular embolization is a procedure that blocks blood flow in a specific area. In this case, it blocks blood flow through a weakened artery in the brain.
Reasons for Procedure
This procedure is done to manage an aneurysm. This is a weakened spot in the wall of the artery. It may cause bleeding or burst. The embolization will decrease the risk of this from happening.
Problems are rare, but all procedures have some risk. Your doctor will review some problems that may happen, such as:
Before your procedure, talk to your doctor about ways to manage factors that may increase your risk of problems, such as:
What to Expect
Prior to Procedure
The doctor will use previous tests to plan the surgery. Follow these steps leading up to the procedure:
A ruptured aneurysm is an emergency. The procedure may need to be done right away.
Your doctor will talk to you about options including:
Description of the Procedure
An incision will be made in your groin. A hollow needle will be inserted into your artery. A long tube will be passed through the needle. An x-ray machine will show the doctor where the tube is in your body.
The tube will be guided through the artery, past the heart, and into the brain. A dye will highlight the blood vessels and blood flow. A second tube will be placed in the first one and guided to the aneurysm. Coils will be guided through the tube and inserted into the area. A blockage will naturally form over the coil. It will stop blood flow to the weak artery. Some aneurysms may need a metal tube called a stent to hold the coils in place.
The doctor will check to make sure blood is no longer flowing into the aneurysm. The tube will be taken out. A seal may be placed over the puncture site to close it. A bandage will be put on the incision.
Immediately After Procedure
You will need to lie flat for 2 to 6 hours.
How Long Will It Take?
It will take 2 to 4 hours.
How Much Will It Hurt?
Anesthesia will prevent pain during the procedure. You may have some discomfort when the tube is first inserted. The area will be sore for a few days after the procedure.
Average Hospital Stay
A person with an unruptured aneurysm will stay in the hospital overnight. A person with an aneurysm that ruptured will need to stay longer.
At the Care Center
The staff will check on your progress until the anesthesia wears off.
During your stay, the hospital staff will take steps to reduce your chance of infection such as:
There are also steps you can take to reduce your chances of infection such as:
Strenuous activities will need to be limited for two weeks.
Call Your Doctor If Any of the Following Occurs
Call your doctor if any of these occur:
If you think you have an emergency, call for emergency medical services right away.
American Heart Association
National Institute of Neurological Disorders and Stroke
Heart and Stroke Foundation of Canada
Brott TG, Halperin JL, et al. 2011 ASA/ACCF/AHA/AANN/AANS/ACR/ASNR/CNS/SAIP/SCAI/SIR/SNIS/SVM/SVS guideline on the management of patients with extracranial carotid and vertebral artery disease: executive summary. Stroke. 2011 Aug;42(8):e420-63 full-text, correction can be found in Stroke 2011 Aug;42(8):e541.
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Last reviewed August 2019 by EBSCO Medical Review Board Rimas Lukas, MD
Last Updated: 8/12/2019
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