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Microsurgical Clipping for Brain Aneurysms

aneurysm with neuroovascular clipping This image illustrates the treatment of a ruptured aneurysm via neurovascular clipping.

What is microsurgical clipping?

Microsurgical clipping is a technique that blocks the blood supply to an aneurysm using a metal clip. This procedure has become the more established method of treating aneurysms. The first aneurysm ever treated by surgical clipping was performed at Johns Hopkins Hospital by Dr Walter Dandy on March 23, 1937.

How is microsurgical clipping performed?

A craniotomy is performed to create an opening in the skull to reach the aneurysm in the brain. The clip is placed on the neck (opening) of the aneurysm to obstruct the flow of blood, and remains inside the brain.

Treating aneurysms at Johns Hopkins

The Johns Hopkins Cerebrovascular Team evaluates each aneurysm patient to decide the best singular therapy or treatment combination for the patient’s specific case.


unruptured arterial aneurysm clipping

Microsurgical exposure of a left basilar
artery/superior cerebellar artery aneurysm. The aneurysm is
seen next to the oculomotor nerve.

unruptured arterial aneurysm clipping

Magnified view of the aneurysm.

unruptured arterial aneurysm clipping

A microclip has been applied to the aneurysm.

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Maryland Patients

To request an appointment or refer a patient, please contact the Johns Hopkins Aneurysm Center at 410-614-1533.
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