Clin Endosc.  2022 Jul;55(4):570-573. 10.5946/ce.2021.175.

A comparison of the effectiveness of four aerosol shielding devices in reducing endoscopists’ exposure to airborne particles during simulated upper gastrointestinal endoscopy

• Higashimori A
• Nadatani Y
• Maruyama H
• Fujiwara Y

• KMID: 2531952
• DOI: http://doi.org/10.5946/ce.2021.175

Figure

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  Fig. 1. Overview photographs for tested devices. (A) Modified mask. (B) Vinyl box with continuous suction. (C) Vinyl box without suction. (D) Aerosol box.

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  Fig. 2. Comparison of the total amount of airborne particles among the different experimental conditions. (A) Time series chart of each intervention over the 6 min experimental period. Lines represent the median total particle count (0.3–2 µm) of six separate trials. Coughs were generated every 30 seconds through the experimental period. (B) The number of total airborne particles during the simulation is shown on a scatter plot with medians and interquartile ranges. n=432. **p<0.01 (versus no device use). n.s, not significant.

Reference

1. Chan SM, Ma TW, Chong MK-C, et al. A proof of concept study: esophagogastroduodenoscopy is an aerosol-generating procedure and continuous oral suction during the procedure reduces the amount of aerosol generated. Gastroenterology. 2020; 159:1949–1951.

2. Sagami R, Nishikiori H, Sato T, et al. Endoscopic shield: barrier enclosure during the endoscopy to prevent aerosol droplets during the COVID-19 pandemic. VideoGIE. 2020; 5:445–448.

3. Kobara H, Nishiyama N, Masaki T. Shielding for patients using a single-use vinyl-box under continuous aerosol suction to minimize SARS-CoV-2 transmission during emergency endoscopy. Dig Endosc. 2020; 32:e114–e115.

4. Endo H, Koike T, Masamune A. Novel device for preventing diffusion of aerosol droplets from subjects undergoing esophagogastroduodenoscopy during COVID-19 pandemic. Dig Endosc. 2020; 32:e140–e141.

5. Maruyama H, Higashimori A, Yamamoto K, et al. Coronavirus disease outbreak: a simple infection prevention measure using a surgical mask during endoscopy. Endoscopy. 2020; 52:E461–E462.

6. Canelli R, Connor CW, Gonzalez M, et al. Barrier enclosure during endotracheal intubation. N Engl J Med. 2020; 382:1957–1958.

7. Gupta JK, Lin CH, Chen Q. Flow dynamics and characterization of a cough. Indoor Air. 2009; 19:517–525.

8. Simpson JP, Wong DN, Verco L, et al. Measurement of airborne particle exposure during simulated tracheal intubation using various proposed aerosol containment devices during the COVID-19 pandemic. Anaesthesia. 2020; 75:1587–1595.

9. Dalli J, Khan MF, Marsh B, et al. Evaluating intubation boxes for airway management. Br J Anaesth. 2020; 125:e293–e295.

10. U.S. Food and Drug Administration (FDA). Protective barrier enclosures without negative pressure used during the COVID-19 pandemic may increase risk to patients and health care providers: letter to health care providers [Internet]. Silver Spring (MD): FDA;2020. [updated 2020 Aug 21; cited 2021 Aug 4]. Available from: https://www.fda.gov/medical-devices/letters-health-care-providers/protective-barrier-enclosures-without-negative-pressure-used-during-covid-19-pandemic-may-increase.