Preliminary Experience With Inertial Movement Technology to Characterize Endotracheal Intubation Kinematics

Evaluating the Use of an Aerosol Box During Simulated Intubations

To evaluate the use of an aerosol box during video laryngoscopy intubation, we conducted a two-phase simulation-based study to assess if there were significant differences in time needed to safely intubate a patient with an aerosol box in place, as well as assess changes in laryngoscopists’ hand motions as determined by changes in accelerometry. 20 anesthesiology providers from our institution participated in the first phase assessing the time to intubation. Use of the aerosol box led to statistically significant increases in intubation times (Wilcoxon-Signed Rank test p < 0.001, z-score = 3.921), with the calculated Pearson’s correlation coefficient (r = 0.877) indicating a large effect size. An 8.5 - 11.5 second difference in median intubation times was maintained between corresponding attempts with versus without the aerosol box. 15 participants completed an optional post-assessment survey, with 10 of 15 respondents firmly stating they would not use the box in clinical practice. The hand accelerometry assessment included five anesthesiology providers from our institution. This revealed a statistically significant increase in trials with aerosol boxes for the left hand’s general accelerometry with a medium effect size (p = 0.031; z = -1.873; r = -0.484), as well as for the right hand’s general accelerometry with a large effect size (p < 0.001; z = -3.351; r = -0.865). Although the aerosol box is an interesting concept, its use is associated with increased time to intubation and a change in ergonomics, which may increase risk during airway management and represents a concern for patient safety.