The FEES box: A novel barrier to contain particles during aerosol-generating procedures

Purpose: Due to the COVID-19 pandemic, aerosol-generating procedures (AGPs) such as flexible endoscopic evaluation of swallowing (FEES) have been deemed high-risk and in some cases restricted, indicating the need for additional personal protective equipment. The aim of this study was to erect and study a protective barrier for FEES.Materials and methods: A PVC cube was constructed to fit over a patient while allowing for upright endoscopy. A plastic drape was fitted over the cube, and the protective barrier was subsequently named the ?FEES Box.? Three different particulate-generating tasks were carried out: sneezing, coughing, and spraying water from an atomizer bottle. Each task was completed within and without the FEES Box, and particulate was measured with a particle counter. The average particles/L detected during the three tasks, and baseline measurements, were statistically compared.Results: Without the FEES Box in place, the sneezing and spraying tasks resulted in a statistically significant increase in particles above baseline (p < 0.001 and p = 0.004, respectively); coughing particulate never reached levels significantly higher than baseline (p = 0.230). With use of the FEES Box, there was no statistically significant increase in particles above baseline in any of the three tasks.Conclusion: The FEES Box effectively contained particles generated during sneezes and an atomizer spray. It would also likely mitigate coughing particulate, but coughing did not generate a significant increase in particles above baseline. Further research is warranted to test the efficacy of the FEES Box in containing particulate matter during a complete FEES procedure.