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 Disorders and Hypersomnia Treatment. Treatment for hypersomnia -- excessive daytime sleepiness -- depends on the cause of the sleep disorder. For example, if you are diagnosed with sleep apnea, your doctor may prescribe a treatment known as continuous positive airway pressure (CPAP) to use when sleeping.