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. Author manuscript; available in PMC: 2015 Dec 1.

Published in final edited form as: Neurosurgery. 2014 Dec;75(6):707–716. doi: 10.1227/NEU.0000000000000525

Maximum membrane and insertion forces. (A) Maximum aneurysm forces were greatest with the Cosmos coil, while maximum forces between VFC and Hypersoft filling coils were statistically indistinguishable. A similar effect was observed in insertion force data. [* Cosmos > VFC = Hypersoft, ** Cosmos > Hypersoft, *** Cosmos > VFC > Hypersoft] (B) Microcatheter placement exerted a graded effect of increasing force with placement more proximal to the dome. However, this relationship was not conserved in insertion force where placement in the top-third and center of the aneurysm were statistically indistinguishable, but both greater than placement in the bottom-third portion. [* Top = Middle > Bottom, ** Top > Middle > Bottom, *** Top > Bottom] (C) Insertion rate did not exhibit consistent effects on maximum observed membrane and insertion forces. For the majority of segments, insertion at all rates was statistically indistinguishable. [* 30 mm/min > 50 mm/min, ** 30 mm/min = 10 mm/min > 50 mm/min].

Maximum membrane and insertion forces. (A) Maximum aneurysm forces were greatest with the Cosmos coil, while maximum forces between VFC and Hypersoft filling coils were statistically indistinguishable. A similar effect was observed in insertion force data. [* Cosmos > VFC = Hypersoft, ** Cosmos > Hypersoft, *** Cosmos > VFC > Hypersoft] (B) Microcatheter placement exerted a graded effect of increasing force with placement more proximal to the dome. However, this relationship was not conserved in insertion force where placement in the top-third and center of the aneurysm were statistically indistinguishable, but both greater than placement in the bottom-third portion. [* Top = Middle > Bottom, ** Top > Middle > Bottom, *** Top > Bottom] (C) Insertion rate did not exhibit consistent effects on maximum observed membrane and insertion forces. For the majority of segments, insertion at all rates was statistically indistinguishable. [* 30 mm/min > 50 mm/min, ** 30 mm/min = 10 mm/min > 50 mm/min].