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- Title
Evaluation of the Pentax-AWS.
- Authors
Kariya, T.; Inagawa, G.; Nakamura, K.; Fujimoto, J.; Aoi, Y.; Morita, S.; Goto, T.
- Abstract
The Pentax-AWS (AWS), a new video laryngoscope, has been shown to be useful in cases of difficult intubation. We hypothesized that the AWS 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. With each device, 23 anesthesiologists performed tracheal intubation in a SimMan manikin in the following scenarios: (1) normal airway, (2) tongue edema, (3) cervical spine rigidity, (4) pharyngeal obstruction, (5) jaw trismus, (6) tongue edema with pharyngeal obstruction. The intubation time and success rate were measured. Each participant was asked to rate the difficulty of intubation (1=very easy; 5=very difficult). In the scenarios of tongue edema and tongue edema with pharyngeal obstruction, the AWS 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. The AWS has an advantage over the Macintosh laryngoscope in simulated tongue edema and tongue edema with pharyngeal obstruction. Further studies in a clinical setting are necessary to confirm these findings.
- Subjects
PENTAX cameras; LARYNGOSCOPES; ANESTHESIOLOGISTS; AIRWAY (Anatomy); CERVICAL vertebrae; STANDARD deviations; PHARYNX intubation; PHYSIOLOGY
- Publication
Acta Anaesthesiologica Scandinavica, 2011, Vol 55, Issue 2, p223
- ISSN
0001-5172
- Publication type
Article
- DOI
10.1111/j.1399-6576.2010.02363.x