title: The LVIS Jr. microstent to assist coil embolization of wide-neck intracranial aneurysms: clinical study to assess safety and efficacy.
abstract: BACKGROUND
  This study was aimed to assess clinical safety and efficacy of the LVIS Jr. microstent in stent-assisted coil embolization of wide-neck intracranial aneurysms.
  
  
  METHODS
  IRB approved single-center interventional clinical study in 22 patients (10 females, 12 males, mean age 55, age range 33-74 years) for the endovascular treatment of wide-neck aneurysms. After obtaining informed consent, patients were included according to the following criteria: aneurysm fundus-to-neck ratio < 2 or neck diameter > 4 mm, and a parent vessel diameter of ≤3.5 mm. Primary end point for clinical safety was absence of death, absence of major or minor stroke, and absence of transient ischemic attack. Primary end point for treatment efficacy was complete angiographic occlusion according to the Raymond-Roy Occlusion Classification (RROC) immediately after the procedure and at follow-up after 3 and 6 months on magnetic resonance imaging (MRI).
  
  
  RESULTS
  In 20/22 (91 %) of patients, the primary end point of safety was reached; in the two remaining patients, transient ischemic attack, but no permanent deficit was observed; in 16/22 (73 %), efficient occlusion (RROC1) was reached, and in 6/22 (27 %), a residual neck remained (RROC2). Single [seven with antegrade, two in crossover configuration, and four with "first-balloon-then-stent" (FBTS) technique] or double-stent (eight patients with Y configuration and one patient with X configuration) deployment was technically successful in all cases.
  
  
  CONCLUSIONS
  Deployment of the LVIS Jr. microstent in various single- or double-stent configurations is safe and effective to assist the treatment of intracranial wide-neck aneurysms.
authors.affiliation: Department of Neuroradiology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany, markus.moehlenbruch@med.uni-heidelberg.de.
authors.forename: M
authors.initials: M
authors.lastname: Möhlenbruch
authors.forename: C
authors.initials: C
authors.lastname: Herweh
authors.forename: L
authors.initials: L
authors.lastname: Behrens
authors.forename: L
authors.initials: L
authors.lastname: Jestaedt
authors.forename: H
authors.initials: H
authors.lastname: Amiri
authors.forename: P A
authors.initials: PA
authors.lastname: Ringleb
authors.forename: M
authors.initials: M
authors.lastname: Bendszus
authors.forename: M
authors.initials: M
authors.lastname: Pham
mesh_terms: D000328:Adult; D000368:Aged; D004621:Embolization, Therapeutic / Q000009:adverse effects / Q000295:instrumentation*; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000473:pathology / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D015607:Stents; D016896:Treatment Outcome