Oxygen at a high flow rate (35 L·min-1) via face mask for preoxygenation

摘要

To the Editor, Administration of 100% oxygen before induction of anesthesia (preoxygenation) is a widely accepted method to maximize oxygen stores. One conventional method for preoxygenation is "tidal breathing for three minutes" by connecting the patient to an anesthesia machine via a close-fitting face mask to avoid leaks in the circuit. In the clinical setting, however, this conventional method may fail to produce maximum oxygen stores because some patients do not tolerate a close-fitting face mask.