title: Crossing chronic total occlusions with the Ocelot system: the initial European experience.
abstract: OBJECTIVE
  The aim of the study was to determine the safety, efficacy and feasibility of a new chronic total occlusion (CTO) device using optical coherence tomography (OCT) technology, the Ocelot catheter (Avinger, Inc., Redwood City, CA, USA), for crossing of SFA CTOs following guidewire failure.
  
  
  RESULTS
  Prospective, multicentre, market preference testing. Thirty-three patients with confirmed CTO (99-100% stenosis by visual estimate) of their superficial femoral artery (SFA) were treated between September 28, 2011, and December 9, 2011, at three European centres. Ocelot crossed 94% (31/33) of CTOs, allowing guidewire placement in the distal true lumen. All (100%) lesions were treated without any major adverse safety events. Procedural time and contrast dose were significantly reduced (p<0.0001) when compared with a similar, non-OCT-guided CTO crossing device (Wildcat catheter; Avinger, Inc.). Overall physician feedback on the catheter performance was positive with an 87% average rating of excellent or good across seven categories. Performance ratings of Ocelot's OCT imaging guidance were consistently positive with an 86% average rating of excellent or good across five OCT categories.
  
  
  CONCLUSIONS
  The Ocelot catheter combines advanced CTO crossing technology with real-time OCT guidance. When compared with a similar non-OCT-guided catheter, crossing efficacy and safety profile improved. Total procedure time and contrast volumes were significantly reduced. The Ocelot is a safe, efficient and effective tool for crossing CTOs.
authors.affiliation: St. Franziskus-Hospital, Münster, Germany.
authors.forename: Arne
authors.initials: A
authors.lastname: Schwindt
authors.forename: Bernhard
authors.initials: B
authors.lastname: Reimers
authors.forename: Dierk
authors.initials: D
authors.lastname: Scheinert
authors.forename: Matthew
authors.initials: M
authors.lastname: Selmon
authors.forename: John P
authors.initials: JP
authors.lastname: Pigott
authors.forename: Jon C
authors.initials: JC
authors.lastname: George
authors.forename: Greg
authors.initials: G
authors.lastname: Robertson
authors.forename: Sean
authors.initials: S
authors.lastname: Janzer
authors.forename: Huey B
authors.initials: HB
authors.lastname: McDaniel
authors.forename: Gataum V
authors.initials: GV
authors.lastname: Shrikhande
authors.forename: Giovanni
authors.initials: G
authors.lastname: Torsello
authors.forename: Johannes
authors.initials: J
authors.lastname: Schaefers
authors.forename: Salvatore
authors.initials: S
authors.lastname: Saccà
authors.forename: Francesco
authors.initials: F
authors.lastname: Versaci
mesh_terms: D000818:Animals; D002908:Chronic Disease; D004867:Equipment Design; D045989:Felidae; D005263:Femoral Artery / Q000000981:diagnostic imaging; D006801:Humans; D011446:Prospective Studies; D011859:Radiography; D016896:Treatment Outcome