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.
It sends a pulse stimulation to the hypoglossal nerve -- the nerve in your neck that controls those muscles that keep the airway open, and stimulates them, so the airway doesn't collapse.. Current standard treatment for sleep apnea is a device called a CPAP.