Abstract
Objectives: We developed a mask for endoscopy to reduce droplet and aerosol dispersion during upper gastrointestinal endoscopy and validated its efficacy. We also evaluated its acceptability to patients undergoing upper gastrointestinal endoscopy though questionnaires.
Methods and Results: Prototype mask for endoscopy: the mask had a three-layer structure consisting of two layers of non-woven fabric and a water absorption sheet. It had a convex shape similar to a coffee filter with an endoscopic insertion port of 15 mm diameter. Comparative experiment of visualized droplet and aerosol dispersion associated with coughing: To validate the efficacy of the mask, we performed a comparative experiment of droplet and aerosol dispersion by visualizing the breath. The mist from coughing was reproduced in a mannequin model, and the difference in dispersion between wearing and not wearing the mask was determined in terms of the flying distance and maximum velocity of the mist. The results showed that the flying distance of the mist with the mask was one-third of that without the mask, and the maximum velocity of the mist with the mask was half that without the mask. Questionnaire study of examinees: A questionnaire was administered to 204 patients who wore a mask for endoscopy to survey their resistance, discomfort, and sense of security to the mask on a 5-point scale (Yes, Relatively yes, Neither yes nor no, Relatively no, No). The results were as follows: 93.1% and 95.6% answered “Relatively no” or “No” for resistance and discomfort, and 57.4% answered “Yes” or “Relatively yes” for sense of security, respectively. Thus, wearing a mask was acceptable to the subjects.
Conclusion: Wearing a mask for endoscopy is an effective measure for reducing droplet and aerosol dispersion, and possibly contributes to the implementation of safe and secure endoscopy.
