A pilot study for novel infection prevention mask during esophagogastroduodenoscopy - A pilot study for novel infection prevention mask during esophagogastroduodenoscopy

The median number of microparticles in volunteers 1, 2, and 3 with and without the aerosol-exposure protection (AP) mask was 8.5 and 110.0, 7.0 and 51.5, and 8.0 and 95.0, respectively (p<0.01). Using the AP mask, microparticles were reduced by approximately 92%. The median distances of microparticle scattering without the AP mask were 60, 0, and 68 in volunteers 1, 2, and 3, respectively. In the 30 patients, the mean SpO2 was 96.3%, and adverse events, such as aspiration pneumonia, were not observed.