Intraaneurysmal Neck Plasty with the Super-Masamune, A Super-Compliant, Double-Lumen Balloon Microcatheter

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We recently developed an improvement on our original Masamune balloon microcatheter, the “Super-Masamune,” which the balloon is more compliant and has a double lumen. It easily herniates into a free space and improves neck protection. Because of the double lumen, it can be used for both neck plasty and for coil insertion. In case 1, a ruptured aneurysm was located in the distal portion of the right posterior cerebral artery. A collateral vessel was derived from the aneurysmal dome. We inserted the Super-Masamune into the aneurysm and performed coil embolization with collateral protection. Case 2 was a basilar tip aneurysm with a very wide neck. We first navigated the Super-Masamune into the aneurysmal dome, and then deployed Enterprise from the right posterior cerebral artery to the basilar artery. Then, coils were inserted from the Super-Masamune to inflate the balloon. Super-Masamune thus enables intraaneurysmal neck plasty with a single microcatheter.