1. Nouruzi-Sedeh P, Schumann M, Groeben H. Laryngoscopy via Macintosh blade versus GlideScope: success rate and time for endotracheal intubation in untrained medical personnel. Anesthesiology 2009;110:32-37.
3. Orebaugh SL. Difficult airway management in the emergency department. J Emerg Med 2002;22:31-48.
4. Marx JA, Hockberger RS, Walls RM, Biros MH. Rosen’s emergency medicine: concepts and clinical practice. 8th ed. Philadelphia, USA: Elsevier Saunders; 2014:9.
5. Kita S, Higashi K, Matsuo M, Sano H, Aoyama K, Takenaka I. Head extension during laryngoscopy for obtaining a best glottic view: comparison of the McGrath and Macintosh laryngoscopes. Masui 2014;63:1300-1305.
6. De Jong A, Molinari N, Conseil M, Coisel Y, Pouzeratte Y, Belafia F, Jung B, Chanques G, Jaber S. Video laryngoscopy versus direct laryngoscopy for orotracheal intubation in the intensive care unit: a systematic review and meta-analysis. Intensive Care Med 2014;40:629-639.
8. Si JW, Lee SB, Do BS. Comparison of the Macintosh laryngoscope and the GlideScope(R) video laryngoscope in easy and simulated difficult airway scenarios: a manikin study. J Korean Soc Emerg Med 2009;20:604-608.
9. Sim GS. Comparison of video laryngoscope and direct laryngoscope on rapidity and accuracy in tracheal intubation by paramedic. J Korean Soc Emerg Med Technol 2010;14:5-18.
10. Son SH, Park SO, Baek KJ, Choi PJ. Comparison of the Macintosh laryngoscope and the Disposcope endoscope (R) in both normal airway and manual in-line stabilization for suspected cervical spine injury patients: a simulation study using an airway training manikin. J Korean Soc Emerg Med 2011;22:628-634.
11. Walls RM, Murphy MF. Manual of emergency airway management. 4th ed. Kang KH, et al, translator. Seoul, Korea: Koonja; 2013:130, 134, 267.
14. Ray DC, Billington C, Kearns PK, Kirkbride R, Mackintosh K, Reeve CS, Robinson N, Stewart CJ, Trudeau T. A comparison of McGrath and Macintosh laryngoscopes in novice users: a manikin study. Anaesthesia 2009;64:1207-1210.
15. Burdett E, Ross-Anderson DJ, Makepeace J, Bassett PA, Clarke SG, Mitchell V. Randomized controlled trial of the A.P. Advance, McGrath, and Macintosh laryngoscopes in normal and difficult intubation scenarios: a manikin study. Br J Anaesth 2011;107:983-988.
16. Im SJ, Yune SJ, Kang SY, Lee SY, Kim HK, Jeong HJ. The effect of eirect feedback in teaching endotracheal intubation. Korean J Med Educ 2007;19:325-333.
17. Kovacs G, Bullock G, Ackroyd-Stolarz S, Cain E, Petrie D. A randomized controlled trial on the effect of educational interventions in promoting airway management skill maintenance. Ann Emerg Med 2000;36:301-309.