Assessment of Preoxygenation using Real-Time End-Tidal Oxygen Measurements Versus Single-Breath End-Tidal Oxygen Measurements in Healthy Volunteers

Supplemental oxygen led to an overestimation of NC EtO₂ across both groups, with NRBM more than NIV. The correlation between SB EtO₂ and NC EtO₂ suggests NC EtO₂ may be useful in assessing preoxygenation in real-time. Further study is needed to examine its clinical efficacy in preventing desaturation events during endotracheal intubation in the ED.