C.3. Why is it important to preoxygenate the patient with obesity? How would you do it? Compare the effectiveness of the four-maximum-breath and 3-minute techniques. What is the importance of continuous positive airway pressure (CPAP) during the induction of general anesthesia? Describe the use of the nasal CPAP mask and transnasal humidified oxygenation rapid-insufflation ventilatory exchange in the induction of general anesthesia. i