Presented at the 2009 Air Medical Transport Conference, Minneapolis, MN, October 2, 2009.
The Usefulness of Design of Experimentation in Defining the Effect Difficult Airway Factors and Training Have on Simulator Oral–Tracheal Intubation Success Rates in Novice Intubators
Article first published online: 2 APR 2010
© 2010 by the Society for Academic Emergency Medicine
Academic Emergency Medicine
Volume 17, Issue 4, pages 460–463, April 2010
How to Cite
Thomas, F., Carpenter, J., Rhoades, C., Holleran, R. and Snow, G. (2010), The Usefulness of Design of Experimentation in Defining the Effect Difficult Airway Factors and Training Have on Simulator Oral–Tracheal Intubation Success Rates in Novice Intubators. Academic Emergency Medicine, 17: 460–463. doi: 10.1111/j.1553-2712.2010.00706.x
The authors of this paper have no financial arrangement with any company or corporate entity in conducting this research and no financial arrangements that may represent a conflict of interest.
- Issue published online: 2 APR 2010
- Article first published online: 2 APR 2010
- Received June 4, 2009; revision received September 23, 2009; accepted October 1, 2009.
- intubation, intratracheal;
- patient simulation;
Objectives: This exploratory study examined novice intubators and the effect difficult airway factors have on pre- and posttraining oral–tracheal simulation intubation success rates.
Methods: Using a two-level, full-factorial design of experimentation (DOE) involving a combination of six airway factors (curved vs. straight laryngoscope blade, trismus, tongue edema, laryngeal spasm, pharyngeal obstruction, or cervical immobilization), 64 airway scenarios were prospectively randomized to 12 critical care nurses to evaluate pre- and posttraining first-pass intubation success rates on a simulator. Scenario variables and intubation outcomes were analyzed using a generalized linear mixed-effects model to determine two-way main and interactive effects.
Results: Interactive effects between the six study factors were nonsignificant (p = 0.69). For both pre- and posttraining, main effects showed the straight blade (p = 0.006), tongue edema (p = 0.0001), and laryngeal spasm (p = 0.004) significantly reduced success rates, while trismus (p = 0.358), pharyngeal obstruction (p = 0.078), and cervical immobilization did not significantly change the success rate. First-pass intubation success rate on the simulator significantly improved (p = 0.005) from pre- (19%) to posttraining (36%).
Conclusions: Design of experimentation is useful in analyzing the effect difficult airway factors and training have on simulator intubation success rates. Future quality improvement DOE simulator research studies should be performed to help clarify the relationship between simulator factors and patient intubation rates.
ACADEMIC EMERGENCY MEDICINE 2010; 17:460–463 © 2010 by the Society for Academic Emergency Medicine