title: Mid-term clinical and angiographic results of cerebral aneurisms treated with matrix2(®) coils.
abstract: OBJECTIVE
  To evaluate 1 year results of endovascular treatment (EVT) of intracranial aneurisms using Matrix second generation detachable coils (MSG(®)).
  
  
  METHODS
  Between January and December 2006, 32 patients with 32 intracranial aneurisms were treated by coiling using MSG(®), with a minimum follow-up of 1 year. Data were acquired prospectively. Exclusion criteria were: permanent adjunctive device, less than 50% MSG(®) length, and additional bioactive or coated coils. All procedures were carried out in a single institution. Six months and 1 year follow-up were performed with magnetic resonance angiography and digital subtraction angiography, respectively. We assessed radiological and clinical results using the modified Raymond classification, a 3-level longitudinal grading scale (LGS), Glasgow outcome and Rankin scales.
  
  
  RESULTS
  Thirteen (40.6%) male and 19 (59.4%) female underwent EVT using MSG(®) with a mean follow-up of 16.6 months. Ruptured aneurisms (75%) outnumbered unruptured. Immediate radiological results showed 15 complete occlusions (46.9%), 12 (37.5%) neck remnant, and five (15.6%) residual sac. In the mean time, six patients (18.7%) needed to be retreated due to insufficient initial packing or early recanalization. Using the LGS, a stable occlusion was observed in 40.7%, a progressive thrombosis in 25%, and 34.3% of the cases evolved unfavorably. Thirty-one patients had stable or improved clinical status, while one patient died from a thromboembolic event 1 month after retreatment (3.1% overall mortality).
  
  
  CONCLUSIONS
  At 1 year follow-up, MSG(®) demonstrated similar angiographic results compared to Matrix first generation coils and didn't suggest advantage over platinum coils.
authors.affiliation: Division of Interventional Neuroradiology, Hôpital Gui de Chauliac, CHU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier, France. jorgelwm@yahoo.com.br
authors.forename: Jorge Luís Wollstein
authors.initials: JL
authors.lastname: Moritz
authors.forename: Jean François
authors.initials: JF
authors.lastname: Vendrell
authors.forename: Denis
authors.initials: D
authors.lastname: Hoa
authors.forename: Nicolas
authors.initials: N
authors.lastname: Menjot
authors.forename: Vincent
authors.initials: V
authors.lastname: Costalat
authors.forename: Hervé
authors.initials: H
authors.lastname: Brunel
authors.forename: Alain
authors.initials: A
authors.lastname: Bonafé
mesh_terms: D000328:Adult; D000368:Aged; D002533:Cerebral Angiography / Q000379:methods*; D057510:Endovascular Procedures / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome