TY - JOUR T1 - Increasing the Packing of Small Aneurysms with Complex-Shaped Coils: An In Vitro Study JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 1446 LP - 1448 VL - 24 IS - 7 AU - Michel Piotin AU - Akira Iijima AU - Hajime Wada AU - Jacques Moret Y1 - 2003/08/01 UR - http://www.ajnr.org/content/24/7/1446.abstract N2 - Summary: Nine embolization experiments of a silicone aneurysm model were conducted by using helical and complex-shaped coils. Coils were introduced up to the point when the adjunct of a supplementary coil caused protrusion into the parent vessel. Packing ratios (volume of coils-aneurysm volume) ranged between 31% and 38%. Optimal packing was achieved with complex-shaped coils used in a concentric fashion. The complex-shaped coils allowed a better aneurysm filling than did helical coils. ER -