 This study found that the Parker-Flexit trademark stylet, PFS, was associated with longer intubation times and greater difficulty in intubating patients with a simulated difficult airway when compared to the GlideWrite registered rigid stylet, GRS. Additionally, the PFS was associated with higher rates of assisted ETT advancement compared to the GRS. This article was authored by G1Bock, Yanji No, Jian Kim, and others.