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.
Surgery is an effective and safe treatment option for many patients with snoring and sleep apnea, particularly those who are unable to use or tolerate CPAP. Proper patient and procedure selection is critical to successful surgical management of obstructive sleep apnea.