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Endovascular Treatment of Cerebral Aneurysms

An In Vitro Study with Detachable Platinum Coils and Tricellulose Acetate Polymer

Michel Piotin1,2, Shinya Mandai1, Kenji Sugiu1, Philippe Gailloud1 and Daniel A. Rüfenacht1

1 Department of Radiology, Section of Neuroradiology, Geneva University Hospital, Switzerland.
2 Present address: 29 Ave. Laumière, 75019 Paris, France.



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  		Fig. 1. —Angiogram of aneurysm (model 2) obtained after maximal dense packing with coils (ratio of coils, 36.1%). Neck (arrow) is still filled with contrast material.

 


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  		Fig. 2A. —Aneurysm (model 3). Angiogram obtained after purposeful minimal packing with coils (ratio of coils, 10.9%) shows sac is still filled with contrast material.

 


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  		Fig. 2B. —Aneurysm (model 3). Angiogram obtained after maximal dense packing with coils and polymer (ratio of coils and polymer, 103.8%) shows total circulatory exclusion of aneurysm.

 


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  		Fig. 3A. —Aneurysm (model 4). Photograph obtained after embolization with coils and polymer shows coil mesh and polymer cast that fills sac. Despite high filling ratio of 140.2%, polymer protrusion is minor, consistent with polymer retraction during precipitation.

 


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  		Fig. 3B. —Aneurysm (model 4). Photograph obtained tangential to neck after embolization procedure shows protrusion of polymer cast into parent vessel.

 

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