title: Influence of coil thickness on packing, re-opening and retreatment of intracranial aneurysms: a comparative study between two types of coils.
abstract: OBJECTIVE
  To compare packing, re-opening and retreatment of intracranial aneurysms treated with two types of coils with different wire thickness and different shapes.
  
  
  METHODS
  Packing, defined as the ratio between volume of inserted coils and volume of aneurysm, was calculated for 235 aneurysms-120 treated with predominantly helical-shaped coils of 0.010-inch diameter wire (GDC 10) and 115 treated with predominantly complex shaped coils of 0.012-inch diameter wire (Cordis TruFill). Aneurysm packing, re-opening and retreatment during follow-up were compared for aneurysms treated with either type of coils.
  
  
  RESULTS
  Mean packing was significantly higher (absolute value 6.8%, relative value 23.0%, p<0.0001) in aneurysms treated with Cordis TruFill coils compared with aneurysms coiled with GDC 10 coils. Six month follow-up angiography was available in 194 of 235 aneurysms. Re-opening occurred in 22 of 99 aneurysms (22.2%) treated with GDC 10 coils and in 15 of 95 aneurysms (15.8%) treated with Cordis TruFill coils. Retreatment was performed in 16 of 120 aneurysms (13.3%) treated with GDC 10 coils and in nine of 115 aneurysms (7.8%) treated with Cordis TruFill coils.
  
  
  CONCLUSIONS
  Coiling of intracranial aneurysms using complex shaped Cordis TruFill coils with a wire diameter of 0.012 inch results in significantly better packing compared with helical GDC 10 coils of 0.010-inch diameter wire. The retreatment rate was lower for aneurysms treated with Cordis TruFill coils compared with aneurysms treated with GDC 10 coils.
authors.affiliation: Department of Radiology, St Elisabeth Ziekenhuis, Tilburg, The Netherlands.
authors.forename: Marjan J
authors.initials: MJ
authors.lastname: Slob
authors.forename: Willem Jan
authors.initials: WJ
authors.lastname: van Rooij
authors.forename: Menno
authors.initials: M
authors.lastname: Sluzewski
mesh_terms: D002533:Cerebral Angiography; D004867:Equipment Design; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000401:mortality / Q000601:surgery*; D012189:Retrospective Studies; D016019:Survival Analysis