In coil embolization, a cerebral aneurysm with a wide neck or branch vessels, and many encounter on the use of adjunctive technique using an assist balloon. During balloon expansion, instead of to protect the aneurysm neck and branch vessel, join pressure damage to the parent vessel. Using a T-silicon vessel model, allowed to expand each balloon assisted constant diameter, it was measured with a pressure monitor.

Experimental safety evaluation at the time of each assist balloon expansion in the coil embolization