This is a procedure to fill and/or close blood vessels. This prevents bleeding and rupture. It is an alternative to open surgery.
Endovascular embolization can treat many conditions, including: Brain aneurysm
—a weakened blood vessel in the brain that collects blood and can bleed
—abnormal connections between arteries and veins (usually present at birth)
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The procedure can be used alone or with other treatments. It will not fix damaged areas of the brain, but it can improve quality of life by stopping bleeding or preventing rupture.
Problems from the procedure are rare, but all procedures have some risk. Your doctor will review potential problems, like: BleedingWeaknessNumbness or tinglingSpeech disturbancesVisual changesConfusion, memory lossSeizuresInfectionReaction to the anesthesia or contrast solutionBlood clotsRuptured aneurysm during surgery
Factors that may increase the risk of complications include: SmokingObesityHigh blood pressure
Your appointment before the surgery may include: Physical exam, blood and imaging testsDiscussion of allergies, your medications, recent illness or conditions, risks and benefits of the procedure
Pictures of the blood vessels to be treated may be taken with
CT scanMRI scanUltrasound Arrange for a ride home.The night before the procedure, do not eat or drink anything after midnight.Discuss your medications with your doctor. You may be asked to stop taking certain medications.
Women should let their doctor know if they are pregnant or planning to become pregnant.
will be used. It will block any pain and keep you asleep through the surgery.
The doctor will monitor your blood pressure, heart rate, and pulse. An IV will be placed in your arm for sedation and anesthesia. The nurse will shave and sterilize the groin area. The catheter will be inserted in this area.
The doctor will make a tiny incision in your groin area to access an artery. The catheter will be placed in the artery and threaded up to the site. A special dye will be given through the catheter. The doctor will be able to see the catheter pathway on a monitor. X-rays will help the doctor find the exact weakened or malformed area.
Once the catheter is in position, medication, coils, or man-made material will be inserted into the catheter to the site. This will close or fill the blood vessel. Imaging tests will be done to make sure the blood vessels have closed.
The catheter and IV line will be removed. You will lie still for 6-8 hours.
30 minutes or longer—more complex procedures may take several hours.
Anesthesia will prevent pain during surgery. Pain and discomfort after the procedure can be managed with medications.
This procedure is done in a hospital setting. The usual length of stay is 2 days. If you have any complications, you will need to stay longer.
You will rest for several hours in bed.Your vital signs will be monitored.
During your stay, the hospital staff will take steps to reduce your chance of infection, such as: Washing their handsWearing gloves or masksKeeping your incisions covered.
There are also steps you can take to reduce your chance of infection, such as: Washing your hands often and reminding your healthcare providers to do the sameReminding your healthcare providers to wear gloves or masksNot allowing others to touch your incision
When you get home, you may have to adjust your activity level while you recover. This may take up to a week. Home care may include: Resting when you need toCaring for the woundPhysical or rehabilitative therapy
It is important for you to monitor your recovery after you leave the hospital. Alert your doctor to any problems right away. If any of the following occur, call your doctor: Any changes in physical ability, such as balance, strength, or movementAny changes to mental status, such as consciousness, memory, or thinkingWeakness, numbness, tinglingSigns of infection including fever and chillsRedness, swelling, increasing pain, bleeding, or discharge from the incision siteHeadacheChanges in visionFaintingPain that cannot be controlled with the medications you've been givenPersistent nausea or vomitingTrouble controlling your bladder and/or bowelsPain, swelling, or cramping in your legs
Call for emergency medical services right away if any of the following occurs: SeizureShortness of breath or chest painLoss of consciousness
If you think you have an emergency, call for medical help right away.
Catheter embolization. Radiological Society of North America Radiology Info website. Available at:
http://www.radiologyinfo.org/en/info.cfm?pg=cathembol. Updated August 14, 2013. Accessed May 29, 2014.
Endovascular (embolization) treatment of aneurysms. The Toronto Brain Vascular Malformation Study Group website. Available at:
http://brainavm.oci.utoronto.ca/malformations/embo_treat_aneurysm_index.htm. Accessed May 29, 2014.
Subarachnoid hemorrhage. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated May 2, 2014. Accessed May 29, 2014.
Last reviewed June 2015 by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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