title: Double-lumen tube tracheal intubation using a rigid video-stylet: a randomized controlled comparison with the Macintosh laryngoscope.
abstract: BACKGROUND
  Despite an increasing need, there is limited experience of double-lumen endobronchial tube (DLT) placement using video laryngoscope. We evaluated DLT intubation using an OptiScope, a rigid video-stylet with a malleable tip derived from the Clarus Video System, in comparison with a Macintosh laryngoscope.
  
  
  METHODS
  After airway evaluation and anaesthetic induction, Cormack and Lehane (C and L) grade was initially assessed in all patients using a Macintosh laryngoscope before tracheal intubation. The trachea was then intubated using either a Macintosh laryngoscope (n=200) or an OptiScope® (n=200). Success rate, intubation time, number of attempts at intubation, vocal cord view during intubation, need for external manipulation, and the incidences of oral mucosal or dental injury were compared between the two devices.
  
  
  RESULTS
  Data were analysed for 397 patients. Intubation time with the OptiScope® was faster [median (inter-quartile range): 15 (12-19) s] than with the Macintosh [18(12-28) s] {mean difference [95% confidence interval (CI)}: 5.5 (3.8-13.2) s, P=0.010]. The success rate of the first intubation was higher with the OptiScope® than with the Macintosh [80.4% vs 89.9%, odds ratio (95% CI): 2.2 (1.22-3.87), P=0.036]. Initial view of the vocal cords was also better, although the final success rate was not different between devices. The need for external laryngeal manipulation, oral mucosal, or dental injury was lower with the OptiScope® compared with the Macintosh laryngoscope (all P<0.01).
  
  
  CONCLUSIONS
  The OptiScope® provides faster tracheal intubation and a higher success rate for the first intubation with less trauma and a better vocal cord view than the Macintosh laryngoscope.
authors: Department of Anesthesiology and Pain Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: M
authors: M
authors: Yang
authors: J A
authors: JA
authors: Kim
authors: H J
authors: HJ
authors: Ahn
authors: J W
authors: JW
authors: Choi
authors: D K
authors: DK
authors: Kim
authors: E A
authors: EA
authors: Cho
mesh_terms: D000328:Adult; D000368:Aged; D000768:Anesthesia, General / Q000379:methods; D004311:Double-Blind Method; D004867:Equipment Design; D005260:Female; D005336:Fiber Optic Technology / Q000295:instrumentation / Q000379:methods; D006801:Humans; D007442:Intubation, Intratracheal / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods; D020704:Laryngoscopes / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D009061:Mouth Mucosa / Q000293:injuries; D019616:Thoracic Surgical Procedures / Q000379:methods; D013997:Time Factors; D018677:Tooth Injuries / Q000209:etiology; D014741:Video Recording / Q000295:instrumentation / Q000379:methods; D055815:Young Adult
keywords: equipment, tubes, double-lumen; laryngoscope; thoracic anaesthesia