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Kickback phenomenon in saccular aneurysm model showing various types of coils inserted into an inadequately small diameter model. Here 4mm diameter x 8 mm long coils are inserted into the 3 mm diameter aneurysm model. A) ED extrasoft coil non SR type. B) ED extrasoft SR type. C) GDC ultrasoft. D) Cerecyte ultipaque. E) Fluoloscopic image inserting ED extrasoft SR type. Abbreviations: ED: electrically detachable, GDC: Guglielmi detachable coil.
