The DRS stands for Drag Reduction System, which enables a car to open its rear wing to limit the downforces on the car. This increases the car's theoretical performance and in theory facilitates passing.
The surgical treatments for obstructive sleep apnea include nasal surgery, palate surgery (including uvulopalatopharyngoplasty [UPPP]), upper airway stimulation therapy, tongue reduction surgery, genioglossus advancement, maxillo-mandibular advancement, tracheostomy, and bariatric surgery.
Sleep apnea is a condition in which you stop breathing in the middle of the night, often several times a night. The deprivation of oxygen, as well as the constant sleep disruption, leads to constant daytime sleepiness, lethargy, and fatigue. It is also associated with more-serious conditions, such as heart disease, diabetes, and obesity.