Aerosol protection using modified N95 respirator during upper gastrointestinal endoscopy: a randomized controlled trial

Abstract

Aerosol protection using modified N�� respirator during upper gastrointestinal endoscopy: a randomized controlled trial This modified N�� respirator had tendency to reduce particles, especially the particle size of �.�-µm generated in upper gastrointestinal endoscopy The standard N�� respirator (�M Aura ����+ model) was modified to create a channel for endoscope insertion. All patients aged �� and above with undetectable COVID-�� virus who underwent diagnostic upper gastrointestinal endoscopy were enrolled and randomly assigned in �:� ratio into the modified N�� group and control (no mask) group.