Aneurysmal Pressure Changes with Nondetachable Balloon Placement and Fluid Infusion: Rationale for Liquid Embolization

Clear, elastic, silicone replica of a lateral sidewall aneurysm.

A, A needle is inserted through the dome, with its tip in the sac to measure intra-aneurysmal pressure. A microcatheter is positioned with its tip in the lumen of the aneurysm. A nondetachable silicone balloon placed in the parent vessel across the aneurysmal neck is inflated, with the use of dyed fluid for visualization.

B, Infusion of dyed fluid into the aneurysm sac via the microcatheter during balloon inflation.

C, Infused fluid exits the aneurysmal sac along a channel created by the microcatheter between the nondetachable balloon and the wall of the parent vessel; fluid collects in the lumen of the proximal parent vessel.