title: Influence of coil geometry on intra-aneurysmal packing density: evaluation of a new primary wind technology.
abstract: BACKGROUND
  This prospective randomized double-blinded in-vitro study was conducted to determine the relative Packing Density (PD) of the new Deltapaq coil (Micrus Endovascular) as compared to Micrus's conventional filling CHE (Helipaq) and finishing CFS (Ultipaq) coils.
  
  
  METHODS
  Two physicians independently deployed the coils under fluoroscopy into a 4mm berry shaped glass aneurysm. Each coil tested was a 4mm x 35cm coil specially made for this study. Physicians and observer were blinded as to the type of coil. Five samples per group, per operator, were deployed.
  
  
  RESULTS
  mean PD were 36.6% (Helipaq), 37.9% (Ultipaq) and 40.4% (Deltapaq). Two-sample T-test showed a significantly higher PD of Deltapaq versus Helipaq (p < 0.022).
  
  
  CONCLUSIONS
  Higher coil PD and better neck coverage may provide an increased biomechanical stability and may potentially reduce the recanalization rate of aneurysms.
  
  
  CONCLUSIONS
  The new Deltapaq coil may have the potential to achieve higher packing densities in the treatment of aneurysms.
authors.affiliation: Biomedical Research Centre, John Radcliffe Hospital, Oxford, United Kingdom. i.grunwald@web.de
authors.forename: Iris
authors.initials: I
authors.lastname: Quasar Grunwald
authors.forename: Andrew
authors.initials: A
authors.lastname: Molyneux
authors.forename: Anna Luisa
authors.initials: AL
authors.lastname: Kühn
authors.forename: Dave
authors.initials: D
authors.lastname: Watson
authors.forename: James V
authors.initials: JV
authors.lastname: Byrne
mesh_terms: D004621:Embolization, Therapeutic / Q000295:instrumentation*; D004867:Equipment Design; D005471:Fluoroscopy; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000628:therapy*; D008422:Materials Testing; D008953:Models, Anatomic; D008955:Models, Cardiovascular; D011446:Prospective Studies