title: Is the Ambu aScope 3 Slim single-use fiberscope equally efficient compared with a conventional bronchoscope for management of the difficult airway?
abstract: OBJECTIVE
  The study objective was to evaluate whether the single-use fiberoptic bronchoscope (FOB), Ambu aScope 3 Slim, was equally efficient compared with the conventional reusable FOB, Olympus LF-GP, for nasal fiberoptic intubation in a manikin.
  
  
  METHODS
  A randomized crossed-over study.
  
  
  METHODS
  The postanesthesia care unit of Tokyo Women's Medical University Hospital.
  
  
  METHODS
  Twenty anesthesiologists who have experienced >50 one-lung ventilation thoracic surgery procedures were invited to participate in this study.
  
  
  METHODS
  A 6.5-mm internal diameter cuffed endotracheal tube (ET) was inserted into the manikin under Ambu aScope 3 Slim (group A) or Olympus LF-GP (group C) guidance.
  
  
  METHODS
  The following time parameters from the beginning of FOB insertion through a nostril were compared between groups: until vocal cord visualization (T1); visualization of the carina (T2); and proper ET placement, as confirmed by the distance of the ET tip to carina (T3).
  
  
  RESULTS
  Mean (SD) T1 in group A and group C were 20 seconds (17 seconds) and 14 seconds (12 seconds), respectively (P= .1050). Mean (SD) T2 in group A and group C were 40 seconds (29 seconds) and 25 seconds (15 seconds), respectively (P= .0287). Mean (SD) T3 in group A and group C were 70 seconds (33 seconds) and 50 seconds (22 seconds), respectively (P= .0098). One case in group A had failed intubation
  
  
  CONCLUSIONS
  The Ambu aScope 3 Slim required more time to intubate than the conventional reusable FOB. It requires more rigidity, similar to the conventional FOB for management of the difficult airway.
authors.affiliation: Department of Anesthesiology, Tokyo Women's Medical University, School of Medicine, 8-1 Kawadacho Shinjukuku, Tokyo 162-8666, Japan. Electronic address: tfukada@anes.twmu.ac.jp.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Fukada
authors.affiliation: Department of Anesthesiology, Tokyo Women's Medical University, School of Medicine, 8-1 Kawadacho Shinjukuku, Tokyo 162-8666, Japan. Electronic address: cadorolily@ybb.ne.jp.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Tsuchiya
authors.affiliation: Department of Anesthesiology, Tokyo Women's Medical University, School of Medicine, 8-1 Kawadacho Shinjukuku, Tokyo 162-8666, Japan. Electronic address: mkthrk@ff.em-net.jp.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Iwakiri
authors.affiliation: Department of Anesthesiology, Tokyo Women's Medical University, School of Medicine, 8-1 Kawadacho Shinjukuku, Tokyo 162-8666, Japan. Electronic address: mozaki@anes.twmu.ac.jp.
authors.forename: Makoto
authors.initials: M
authors.lastname: Ozaki
mesh_terms: D058109:Airway Management / Q000295:instrumentation / Q000379:methods*; D000072080:Anesthesiologists; D020680:Bronchoscopes; D001999:Bronchoscopy / Q000295:instrumentation / Q000379:methods*; D018592:Cross-Over Studies; D004867:Equipment Design; D005336:Fiber Optic Technology / Q000295:instrumentation*; D006785:Hospitals, University; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation / Q000379:methods; D008348:Manikins; D013997:Time Factors
keywords: Difficult airway; Fiberoptic bronchoscope; Manikin; Nasotracheal intubation; Single-use fiberscope