To the Editor W e read with interest the article published by Chen et al 1 titled "Comparison of a Nasal Mask and Traditional Nasal Cannula During Intravenous Anesthesia for Gastroscopy Procedures: A Randomized Controlled Trial." The authors have innovatively used an infant mask as a nasal mask and found a significant reduction in the incidence of desaturation (18% vs 27.7%). We would like to address certain issues in the study.
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