A vital component used to minimize the risk of hypoxemia during endotracheal intubations is preoxygenation. Preoxygenation is a method to to prolong the time to oxygen desaturation by replacing the lung volume with 100% oxygen compared to 21% oxygen (room air) through the administration of supplemental oxygen. This increases the reservoir of oxygen in the lungs that the body can use to prolong their time to desaturation. Studies have shown a good preoxygenation technique can increase the time to oxygen desaturation from 0.6 min to 8 min in a non obese patient. This remarkable impact at preventing hypoxemia has made preoxygenation the gold standard to minimize hypoxemia during airway management.