Evaluation of the Pentax- XXXX (  ) and the Macintosh laryngoscope in difficult intubation: a manikin study.

@entity1 @entity2003 @entity8404 @entity4 @entity3885
BACKGROUND: The Pentax- @entity8404 ( @entity8404 (  )), a new video laryngoscope, has been shown to be useful in cases of difficult intubation. We hypothesized that the @entity8404 (  ) would be more useful in the settings of a narrow upper airway than the Macintosh laryngoscope. We compared each device in simulated scenarios of representative difficulty of tracheal intubation using a manikin. The primary endpoint was the rate of successful intubation. METHODS: With each device, 23 anesthesiologists performed tracheal intubation in a SimMan(  ) manikin in the following scenarios: (1) normal airway, (2) @entity4 , (3) cervical @entity2003 , (4) @entity3885 , (5) jaw trismus, (6) @entity4 with @entity3885 . The intubation time and success rate were measured. Each @entity1 was asked to rate the difficulty of intubation (1=very easy; 5=very difficult). RESULTS: In the scenarios of @entity4 and @entity4 with @entity3885 , the @entity8404 (  ) yielded a higher success rate (100% vs. 34.8%; P<0.001, 65.2% vs. 21.7%; P=0.006), a shorter intubation time [14.6 (7.0) vs. 33.4 (13.0) s; P<0.001, 24.5 (12.0) vs. 37.6 (11.9); P=0.047; mean (standard deviation)], and a lower difficulty score [2 (1-4) vs. 5 (1-5); P<0.001, 4 (2-5) vs. 5 (3-5); P<0.001; median (range)], compared with the Macintosh laryngoscope. CONCLUSION: The @entity8404 (  ) has an advantage over the Macintosh laryngoscope in simulated @entity4 and @entity4 with @entity3885 . Further studies in a clinical setting are necessary to confirm these findings.
