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 common condition characterized by a periodic reduction in or a complete stop of breathing during sleep. There are two main types of sleep apnea; obstructive sleep apnea (OSA) and central sleep apnea (CSA). Mixed sleep apnea refers to the combination of both central and obstructive sleep apnea.