In aneurysm repair procedures involving liquid embolics, what is deployed across the neck of the aneurysm to prevent extravasation?

In aneurysm repair procedures involving liquid embolics, deploying a balloon across the neck of the aneurysm is a critical step to prevent extravasation. When using liquid embolic agents, the goal is to occlude the blood flow into the aneurysm to facilitate healing and prevent rupture.

The balloon acts as a temporary barrier, allowing for controlled delivery of the embolic material while simultaneously preventing it from escaping into the surrounding vasculature. This ensures that the liquid embolic can achieve optimal placement within the aneurysm without the risk of it leaking out, which could lead to complications or ineffective treatment.

Using a stent, catheter, or coil in this context does not effectively serve the same purpose. Stents are typically used to provide structural support or maintain patency in vessels but do not directly prevent extravasation of liquid embolics. Catheters are essential for delivering embolics but do not act as a barrier themselves. Coils are used for occlusion but can be less effective when dealing with liquid agents, as they might not prevent extravasation effectively in the same manner that a balloon does. Therefore, the use of a balloon in this scenario is a crucial and appropriate choice for ensuring the success of the procedure.