If the oxygen saturation falls below 90% occurs at any point, the protocol will stop immediately, and management will proceed in the normal fashion at the discretion of the attending anesthesiologist, which could involve immediate intubation using the GlideScope or other intubation device, or ventilation using a mask or laryngeal mask airway. If, at any time, the attending anesthesiologist believes there is any risk to the patient because of the study protocol, the protocol will be terminated and normal anesthetic care will continue.