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DOI: 10.1055/a-1220-6024
Coronavirus disease outbreak: a simple infection prevention measure using a surgical mask during endoscopy
Coronavirus disease (COVID-19) transmission occurs primarily through direct contact or air droplets [1] [2], and endoscopic procedures are high risk. In this era of “with COVID-19,” establishing simple infection prevention measures within an endoscopy department to protect both patients and personnel is strongly recommended. Hence, we proposed a simple method using a modified surgical mask. We made a hole (10 mm diameter) in the center of a surgical mask ([Fig. 1]). Next, simulated endoscopy was performed with and without the modified surgical mask using a mannequin with the mouthpiece in place ([Video 1]).
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Video 1 A simple infection prevention measure using a modified surgical mask during endoscopy.
Quality:
Cough was simulated using a 0.4-MPa pressure accumulation sprayer containing 10 mL of fluorescent dye [3] [4] [5]. An endoscopist (height 173 cm) wearing standard personal protective equipment (PPE) performed upper gastrointestinal endoscopy. A nurse (height 163 cm) wearing standard PPE stood on the other side of the “patient.” The scattered dye droplets produced by the simulated cough were visualized using ultraviolet light.
Without the modified surgical mask, contamination of the floor occurred within approximately 1.5 m from the bed, and the dye was clearly identified on the gloves, right arm, upper chest, abdomen, and shoe covers of the endoscopist ([Fig. 2]). There was no dye on the endoscopist’s eye shield, mask, or cap. The dye was identified on the gloves of the nurse ([Fig. 3]). When the modified surgical mask was worn by the “patient,” excessive amounts of dye were found inside the mask ([Fig. 4]). There was no contamination of the floor, and only a minimum amount of dye was found on the endoscopist’s upper chest and abdomen ([Fig. 5]). No dye was found on the nurse.
![](https://www.thieme-connect.de/media/endoscopy/202012/thumbnails/10-1055-a-1220-6024-i1861ev2.jpg)
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In summary, upper gastrointestinal endoscopy could be performed on a “patient” wearing a modified surgical mask. This method can substantially reduce contamination by splash and aerosol droplets produced by patients during endoscopy, and is simple and cost-effective.
Endoscopy_UCTN_Code_TTT_1AU_2AC
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Competing interests
The authors declare that they have no conflict of interest.
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References
- 1 Tang JW, Li Y, Eames I. et al. Factors involved in the aerosol transmission of infection and control of ventilation in healthcare premises. J Hosp Infect 2006; 64: 100-114
- 2 Huang C, Wang Y, Li X. et al. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet 2020; 395: 497-506
- 3 Gupta JK, Lin CH, Chen Q. Flow dynamics and characterization of a cough. Indoor Air 2009; 19: 517-525
- 4 Ogata M, Ichikawa M, Tsutsumi H. et al. Measurement of cough droplet deposition using the cough machine. J Environ Eng 2018; 83: 57-64
- 5 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; DOI: 10.1016/j.vgie.2020.05.002.
Corresponding author
Publication History
Article published online:
20 August 2020
© 2020. Thieme. All rights reserved.
Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany
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References
- 1 Tang JW, Li Y, Eames I. et al. Factors involved in the aerosol transmission of infection and control of ventilation in healthcare premises. J Hosp Infect 2006; 64: 100-114
- 2 Huang C, Wang Y, Li X. et al. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet 2020; 395: 497-506
- 3 Gupta JK, Lin CH, Chen Q. Flow dynamics and characterization of a cough. Indoor Air 2009; 19: 517-525
- 4 Ogata M, Ichikawa M, Tsutsumi H. et al. Measurement of cough droplet deposition using the cough machine. J Environ Eng 2018; 83: 57-64
- 5 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; DOI: 10.1016/j.vgie.2020.05.002.
![](https://www.thieme-connect.de/media/endoscopy/202012/thumbnails/10-1055-a-1220-6024-i1861ev1.jpg)
![Zoom Image](/products/assets/desktop/css/img/icon-figure-zoom.png)
![](https://www.thieme-connect.de/media/endoscopy/202012/thumbnails/10-1055-a-1220-6024-i1861ev2.jpg)
![Zoom Image](/products/assets/desktop/css/img/icon-figure-zoom.png)
![](https://www.thieme-connect.de/media/endoscopy/202012/thumbnails/10-1055-a-1220-6024-i1861ev3.jpg)
![Zoom Image](/products/assets/desktop/css/img/icon-figure-zoom.png)
![](https://www.thieme-connect.de/media/endoscopy/202012/thumbnails/10-1055-a-1220-6024-i1861ev4.jpg)
![Zoom Image](/products/assets/desktop/css/img/icon-figure-zoom.png)
![](https://www.thieme-connect.de/media/endoscopy/202012/thumbnails/10-1055-a-1220-6024-i1861ev5.jpg)
![Zoom Image](/products/assets/desktop/css/img/icon-figure-zoom.png)