Fig. (6) Results of a study by Sakles et al. (2014). The authors concluded that over the course of residency training in emergency medicine there was no significant improvement in resident first pass success rates when using direct laryngoscopy (DL), but substantial improvement when the GlideScope (GVL) was used for intubation. PGY = post-graduate year of training. From: Sakles JC, Mosier J, Patanwala AE, Dicken J. Learning curves for direct laryngoscopy and GlideScope® video laryngoscopy in an emergency medicine residency. West J Emerg Med. 2014 Nov;15(7):930-7. doi: 10.5811/westjem.2014.9.23691. Epub 2014 Oct 29. PubMed PMID: 25493156; PubMed Central PMCID: PMC4251257. Copyright ©2014 Sakles et al. From an Open Access article distributed under the terms of the Creative Commons Non-Commercial Attribution License, which permits its use in any digital medium, provided the original work is properly cited and not altered.