How are brain aneurysms treated?

A brain aneurysm, also called a cerebral aneurysm, develops when a weak spot in a brain artery wall bulges and fills with blood. If the aneurysm ruptures, it can lead to a life-threatening haemorrhagic stroke. Modern medicine offers several effective treatment options, chosen according to the aneurysm’s size, location, and whether it has ruptured.

Unruptured aneurysms

If the risk of rupture is low, doctors may recommend careful monitoring rather than immediate intervention. Regular MRI or CT scans are used to track the aneurysm’s size and shape. If the aneurysm is considered high-risk, preventive treatment is advised.

The most common approach is endovascular therapy, a minimally invasive procedure. A catheter is inserted through the wrist or groin and guided to the brain, where tiny devices such as coils, stents, or intrasaccular implants are placed inside the aneurysm. These promote clotting and seal it off, preventing rupture. A variation of this technique, called flow diversion, involves placing a stent in the parent artery to redirect blood flow away from the aneurysm, allowing it to heal naturally over time.

Another option is surgical clipping, where a neurosurgeon performs open brain surgery and places a small metal clip across the base of the aneurysm. This blocks blood from entering it. Although more invasive, clipping remains an effective treatment and was the original method used for aneurysm repair.

Ruptured aneurysms

When an aneurysm bursts, emergency treatment is vital to stop the bleeding and reduce the risk of re-bleeding. Both endovascular coiling and surgical clipping may be used, although coiling is the NICE recommended treatment due to lower complications. Recovery is often complex, as complications such as brain swelling or vasospasm (spasm of blood vessels that reduces blood flow) can occur.

Recovery and supportive care

Treatment does not end with surgery or intervention. Supportive measures, including pain control, blood pressure management, and rehabilitation therapies, are essential to aid recovery and improve long-term outcomes.

Summary

Management of a brain aneurysm depends on many factors, including rupture status, size, and location. Advances in treatments and imaging have greatly improved survival and recovery, giving patients better options than ever before.