RESULTS
Video analysis revealed droplet formation only in three manoeuvers
during nasoendoscopy – 1) sneezing (Image 1a), 2) vocalization(Image 1b), and 3) nasal decongestion spray (Image 1c). A
capillary bridge of mucus was seen when the nasoendoscope exited the wet
nares in one volunteer. No droplet formation was demonstrated during
oral and nasopharyngeal swab testing.
Video 1a shows the droplets produced when the patient exhales out
through the nose following nasal spray. Video 1b shows the droplets
produced when the patient sneezes during nasoendoscopy. Video 1a and 1b
have been slowed down 12 times. Video 1c shows the droplets produced
whilst vocalizing plosives and a cough. There are more droplets seen
whilst vocalizing than coughing.