Comparison of the Ambu AuraFlex with the laryngeal mask airway Flexible: a manikin study

J Oral Maxillofac Surg. 2011 Jul;69(7):e269-72. doi: 10.1016/j.joms.2011.02.117. Epub 2011 May 6.


Purpose: The present study compared the Ambu AuraFlex and the laryngeal mask airway (LMA) Flexible with regard to time required for and success rates of insertion on a manikin by dental students who had never used an LMA. In addition, participants' views on ease of insertion of each device were surveyed.

Materials and methods: Subjects consisted of 30 dental students who inserted each airway device in a manikin. The time required for and success rates of insertion were measured. Subjects were then asked to rate the ease of insertion of each device using the 100-mm visual analog scale (from 0 mm = extremely easy to 100 mm = extremely difficult).

Results: Insertion time was shorter with the Ambu AuraFlex (26.6 ± 7.1 seconds) than with the LMA Flexible (30.3 ± 6.8 seconds; P = .045). The rate of successful insertion using the Ambu AuraFlex (28 of 30 attempts, 93.3%) was greater than that with the LMA Flexible (23 of 30 attempts, 76.7%), although the difference was not statistically significant (P = .145). Ambu AuraFlex insertion was considered less difficult (median, 41 mm; 10th to 90th percentiles, 18 to 78 mm) than LMA Flexible insertion (60 mm; 42 to 82 mm; P = .004), as rated using the 100-mm visual analog scale.

Conclusions: The Ambu AuraFlex appears to be useful for inexperienced users because it enables quicker and easier insertion than the LMA Flexible.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Airway Management / instrumentation*
  • Airway Management / methods
  • Attitude of Health Personnel
  • Equipment Design
  • Female
  • Humans
  • Laryngeal Masks*
  • Male
  • Manikins
  • Students, Dental
  • Time Factors
  • Young Adult