The Exchange-Free Technique: A Novel Technique for Enhancing Surpass Flow Diverter Placement.

Although the risk is, in general, small, it may be significant if there is residual opacification of the aneurysm dome on follow-up imaging.[ 20 ] The factors involved in residual aneurysmal filling after flow diversion include malapposition,[ 21 , 22 , 23 , 24 , 25 , 26 ] aneurysm size,[ 27 ] length of transition zone[ 28 ] and possibly strut thickness.[ 29 ]

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