We are developing shape memory polymer (SMP) foam devices for embolizing and treating cerebrovascular aneurysms. Cerebral aneurysm rupture occurs in approximately 30,000 people per year in the United States, with devastating consequences [1]. Further, three-fourths of patients will either die or become neurologically debilitated [1]. The SMP foam device is designed to rapidly and efficiently promote acute blood clotting with one device treating an aneurysm [2]. Some key features in the foams that enable the clotting efficacy are biocompatibility [3], open cell architecture with tortuous flow and high surface area to volume ratios [3], and large (50x-100x) volume expansions that permit compact delivery through a catheter with actuation and deployment in the aneurysm.

This paper describes additional challenges and engineered solutions for transcatheter delivery of a SMP foam embolic device. The primary challenge addressed here...

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