High-Flow Nasal Cannula (HFNC) Preoxygenation in Obese Patients Undergoing General Anesthesia

"Preoxygenation trough High Flow Nasal Cannula (HFNC) at 100% FiO2, 50 liters/min and closed mouth.~After Rapid Sequence Induction (RSI), maintenance of apnea with HFNC at 100% FiO2, 70 liters/min and jaw thrust.~At time of peripheral oxygen saturations (SpO2) decreases by 2% or after 10 minutes of apnea, the participant is intubated."

"Preoxygenation trough standard anesthesia FaceMask (FM) at 100% FiO2, 12 liters/min, CPAP 7 cmH2O.~After Rapid Sequence Induction (RSI), maintenance of apnea without mask. At time of peripheral oxygen saturations (SpO2) decreases by 2% or after 10 minutes of apnea, the participant is intubated."